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strict';\nvar NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar defineProperty = require('../internals/object-define-property').f;\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar uid = require('../internals/uid');\n\nvar Int8Array = global.Int8Array;\nvar Int8ArrayPrototype = Int8Array && Int8Array.prototype;\nvar Uint8ClampedArray = global.Uint8ClampedArray;\nvar Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;\nvar TypedArray = Int8Array && getPrototypeOf(Int8Array);\nvar TypedArrayPrototype = Int8ArrayPrototype && getPrototypeOf(Int8ArrayPrototype);\nvar ObjectPrototype = Object.prototype;\nvar isPrototypeOf = ObjectPrototype.isPrototypeOf;\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');\n// Fixing native typed arrays in Opera Presto crashes the browser, see #595\nvar NATIVE_ARRAY_BUFFER_VIEWS = NATIVE_ARRAY_BUFFER && !!setPrototypeOf && classof(global.opera) !== 'Opera';\nvar TYPED_ARRAY_TAG_REQIRED = false;\nvar NAME;\n\nvar TypedArrayConstructorsList = {\n  Int8Array: 1,\n  Uint8Array: 1,\n  Uint8ClampedArray: 1,\n  Int16Array: 2,\n  Uint16Array: 2,\n  Int32Array: 4,\n  Uint32Array: 4,\n  Float32Array: 4,\n  Float64Array: 8\n};\n\nvar isView = function isView(it) {\n  var klass = classof(it);\n  return klass === 'DataView' || has(TypedArrayConstructorsList, klass);\n};\n\nvar isTypedArray = function (it) {\n  return isObject(it) && has(TypedArrayConstructorsList, classof(it));\n};\n\nvar aTypedArray = function (it) {\n  if (isTypedArray(it)) return it;\n  throw TypeError('Target is not a typed array');\n};\n\nvar aTypedArrayConstructor = function (C) {\n  if (setPrototypeOf) {\n    if (isPrototypeOf.call(TypedArray, C)) return C;\n  } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {\n    var TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {\n      return C;\n    }\n  } throw TypeError('Target is not a typed array constructor');\n};\n\nvar exportTypedArrayMethod = function (KEY, property, forced) {\n  if (!DESCRIPTORS) return;\n  if (forced) for (var ARRAY in TypedArrayConstructorsList) {\n    var TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {\n      delete TypedArrayConstructor.prototype[KEY];\n    }\n  }\n  if (!TypedArrayPrototype[KEY] || forced) {\n    redefine(TypedArrayPrototype, KEY, forced ? property\n      : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);\n  }\n};\n\nvar exportTypedArrayStaticMethod = function (KEY, property, forced) {\n  var ARRAY, TypedArrayConstructor;\n  if (!DESCRIPTORS) return;\n  if (setPrototypeOf) {\n    if (forced) for (ARRAY in TypedArrayConstructorsList) {\n      TypedArrayConstructor = global[ARRAY];\n      if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {\n        delete TypedArrayConstructor[KEY];\n      }\n    }\n    if (!TypedArray[KEY] || forced) {\n      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable\n      try {\n        return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array[KEY] || property);\n      } catch (error) { /* empty */ }\n    } else return;\n  }\n  for (ARRAY in TypedArrayConstructorsList) {\n    TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {\n      redefine(TypedArrayConstructor, KEY, property);\n    }\n  }\n};\n\nfor (NAME in TypedArrayConstructorsList) {\n  if (!global[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;\n}\n\n// WebKit bug - typed arrays constructors prototype is Object.prototype\nif (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {\n  // eslint-disable-next-line no-shadow\n  TypedArray = function TypedArray() {\n    throw TypeError('Incorrect invocation');\n  };\n  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {\n    if (global[NAME]) setPrototypeOf(global[NAME], TypedArray);\n  }\n}\n\nif (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {\n  TypedArrayPrototype = TypedArray.prototype;\n  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {\n    if (global[NAME]) setPrototypeOf(global[NAME].prototype, TypedArrayPrototype);\n  }\n}\n\n// WebKit bug - one more object in Uint8ClampedArray prototype chain\nif (NATIVE_ARRAY_BUFFER_VIEWS && getPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {\n  setPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);\n}\n\nif (DESCRIPTORS && !has(TypedArrayPrototype, TO_STRING_TAG)) {\n  TYPED_ARRAY_TAG_REQIRED = true;\n  defineProperty(TypedArrayPrototype, TO_STRING_TAG, { get: function () {\n    return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;\n  } });\n  for (NAME in TypedArrayConstructorsList) if (global[NAME]) {\n    createNonEnumerableProperty(global[NAME], TYPED_ARRAY_TAG, NAME);\n  }\n}\n\nmodule.exports = {\n  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,\n  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,\n  aTypedArray: aTypedArray,\n  aTypedArrayConstructor: aTypedArrayConstructor,\n  exportTypedArrayMethod: exportTypedArrayMethod,\n  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,\n  isView: isView,\n  isTypedArray: isTypedArray,\n  TypedArray: TypedArray,\n  TypedArrayPrototype: TypedArrayPrototype\n};\n","var has = require('../internals/has');\nvar toObject = require('../internals/to-object');\nvar sharedKey = require('../internals/shared-key');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar IE_PROTO = sharedKey('IE_PROTO');\nvar ObjectPrototype = Object.prototype;\n\n// `Object.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.getprototypeof\nmodule.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {\n  O = toObject(O);\n  if (has(O, IE_PROTO)) return O[IE_PROTO];\n  if (typeof O.constructor == 'function' && O instanceof O.constructor) {\n    return O.constructor.prototype;\n  } return O instanceof Object ? ObjectPrototype : null;\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\nvar quot = /\"/g;\n\n// B.2.3.2.1 CreateHTML(string, tag, attribute, value)\n// https://tc39.github.io/ecma262/#sec-createhtml\nmodule.exports = function (string, tag, attribute, value) {\n  var S = String(requireObjectCoercible(string));\n  var p1 = '<' + tag;\n  if (attribute !== '') p1 += ' ' + attribute + '=\"' + String(value).replace(quot, '&quot;') + '\"';\n  return p1 + '>' + S + '</' + tag + '>';\n};\n","var fails = require('../internals/fails');\n\n// check the existence of a method, lowercase\n// of a tag and escaping quotes in arguments\nmodule.exports = function (METHOD_NAME) {\n  return fails(function () {\n    var test = ''[METHOD_NAME]('\"');\n    return test !== test.toLowerCase() || test.split('\"').length > 3;\n  });\n};\n","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar Iterators = require('../internals/iterators');\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar ARRAY_ITERATOR = 'Array Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);\n\n// `Array.prototype.entries` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.entries\n// `Array.prototype.keys` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.keys\n// `Array.prototype.values` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.values\n// `Array.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@iterator\n// `CreateArrayIterator` internal method\n// https://tc39.github.io/ecma262/#sec-createarrayiterator\nmodule.exports = defineIterator(Array, 'Array', function (iterated, kind) {\n  setInternalState(this, {\n    type: ARRAY_ITERATOR,\n    target: toIndexedObject(iterated), // target\n    index: 0,                          // next index\n    kind: kind                         // kind\n  });\n// `%ArrayIteratorPrototype%.next` method\n// https://tc39.github.io/ecma262/#sec-%arrayiteratorprototype%.next\n}, function () {\n  var state = getInternalState(this);\n  var target = state.target;\n  var kind = state.kind;\n  var index = state.index++;\n  if (!target || index >= target.length) {\n    state.target = undefined;\n    return { value: undefined, done: true };\n  }\n  if (kind == 'keys') return { value: index, done: false };\n  if (kind == 'values') return { value: target[index], done: false };\n  return { value: [index, target[index]], done: false };\n}, 'values');\n\n// argumentsList[@@iterator] is %ArrayProto_values%\n// https://tc39.github.io/ecma262/#sec-createunmappedargumentsobject\n// https://tc39.github.io/ecma262/#sec-createmappedargumentsobject\nIterators.Arguments = Iterators.Array;\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('keys');\naddToUnscopables('values');\naddToUnscopables('entries');\n","var path = require('../internals/path');\nvar has = require('../internals/has');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineProperty = require('../internals/object-define-property').f;\n\nmodule.exports = function (NAME) {\n  var Symbol = path.Symbol || (path.Symbol = {});\n  if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {\n    value: wrappedWellKnownSymbolModule.f(NAME)\n  });\n};\n","var anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\n\n// `Object.setPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.setprototypeof\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n/* eslint-disable no-proto */\nmodule.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {\n  var CORRECT_SETTER = false;\n  var test = {};\n  var setter;\n  try {\n    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;\n    setter.call(test, []);\n    CORRECT_SETTER = test instanceof Array;\n  } catch (error) { /* empty */ }\n  return function setPrototypeOf(O, proto) {\n    anObject(O);\n    aPossiblePrototype(proto);\n    if (CORRECT_SETTER) setter.call(O, proto);\n    else O.__proto__ = proto;\n    return O;\n  };\n}() : undefined);\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar STRING_ITERATOR = 'String Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);\n\n// `String.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator\ndefineIterator(String, 'String', function (iterated) {\n  setInternalState(this, {\n    type: STRING_ITERATOR,\n    string: String(iterated),\n    index: 0\n  });\n// `%StringIteratorPrototype%.next` method\n// https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next\n}, function next() {\n  var state = getInternalState(this);\n  var string = state.string;\n  var index = state.index;\n  var point;\n  if (index >= string.length) return { value: undefined, done: true };\n  point = charAt(string, index);\n  state.index += point.length;\n  return { value: point, done: false };\n});\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar ArrayIteratorMethods = require('../modules/es.array.iterator');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar ArrayValues = ArrayIteratorMethods.values;\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  if (CollectionPrototype) {\n    // some Chrome versions have non-configurable methods on DOMTokenList\n    if (CollectionPrototype[ITERATOR] !== ArrayValues) try {\n      createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);\n    } catch (error) {\n      CollectionPrototype[ITERATOR] = ArrayValues;\n    }\n    if (!CollectionPrototype[TO_STRING_TAG]) {\n      createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);\n    }\n    if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {\n      // some Chrome versions have non-configurable methods on DOMTokenList\n      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {\n        createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);\n      } catch (error) {\n        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];\n      }\n    }\n  }\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar ArrayBufferModule = require('../internals/array-buffer');\nvar anInstance = require('../internals/an-instance');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar toLength = require('../internals/to-length');\nvar toIndex = require('../internals/to-index');\nvar toOffset = require('../internals/to-offset');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar typedArrayFrom = require('../internals/typed-array-from');\nvar forEach = require('../internals/array-iteration').forEach;\nvar setSpecies = require('../internals/set-species');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar InternalStateModule = require('../internals/internal-state');\nvar inheritIfRequired = require('../internals/inherit-if-required');\n\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar round = Math.round;\nvar RangeError = global.RangeError;\nvar ArrayBuffer = ArrayBufferModule.ArrayBuffer;\nvar DataView = ArrayBufferModule.DataView;\nvar NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;\nvar TYPED_ARRAY_TAG = ArrayBufferViewCore.TYPED_ARRAY_TAG;\nvar TypedArray = ArrayBufferViewCore.TypedArray;\nvar TypedArrayPrototype = ArrayBufferViewCore.TypedArrayPrototype;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar isTypedArray = ArrayBufferViewCore.isTypedArray;\nvar BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';\nvar WRONG_LENGTH = 'Wrong length';\n\nvar fromList = function (C, list) {\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n};\n\nvar addGetter = function (it, key) {\n  nativeDefineProperty(it, key, { get: function () {\n    return getInternalState(this)[key];\n  } });\n};\n\nvar isArrayBuffer = function (it) {\n  var klass;\n  return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';\n};\n\nvar isTypedArrayIndex = function (target, key) {\n  return isTypedArray(target)\n    && typeof key != 'symbol'\n    && key in target\n    && String(+key) == String(key);\n};\n\nvar wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {\n  return isTypedArrayIndex(target, key = toPrimitive(key, true))\n    ? createPropertyDescriptor(2, target[key])\n    : nativeGetOwnPropertyDescriptor(target, key);\n};\n\nvar wrappedDefineProperty = function defineProperty(target, key, descriptor) {\n  if (isTypedArrayIndex(target, key = toPrimitive(key, true))\n    && isObject(descriptor)\n    && has(descriptor, 'value')\n    && !has(descriptor, 'get')\n    && !has(descriptor, 'set')\n    // TODO: add validation descriptor w/o calling accessors\n    && !descriptor.configurable\n    && (!has(descriptor, 'writable') || descriptor.writable)\n    && (!has(descriptor, 'enumerable') || descriptor.enumerable)\n  ) {\n    target[key] = descriptor.value;\n    return target;\n  } return nativeDefineProperty(target, key, descriptor);\n};\n\nif (DESCRIPTORS) {\n  if (!NATIVE_ARRAY_BUFFER_VIEWS) {\n    getOwnPropertyDescriptorModule.f = wrappedGetOwnPropertyDescriptor;\n    definePropertyModule.f = wrappedDefineProperty;\n    addGetter(TypedArrayPrototype, 'buffer');\n    addGetter(TypedArrayPrototype, 'byteOffset');\n    addGetter(TypedArrayPrototype, 'byteLength');\n    addGetter(TypedArrayPrototype, 'length');\n  }\n\n  $({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {\n    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,\n    defineProperty: wrappedDefineProperty\n  });\n\n  module.exports = function (TYPE, wrapper, CLAMPED) {\n    var BYTES = TYPE.match(/\\d+$/)[0] / 8;\n    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';\n    var GETTER = 'get' + TYPE;\n    var SETTER = 'set' + TYPE;\n    var NativeTypedArrayConstructor = global[CONSTRUCTOR_NAME];\n    var TypedArrayConstructor = NativeTypedArrayConstructor;\n    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;\n    var exported = {};\n\n    var getter = function (that, index) {\n      var data = getInternalState(that);\n      return data.view[GETTER](index * BYTES + data.byteOffset, true);\n    };\n\n    var setter = function (that, index, value) {\n      var data = getInternalState(that);\n      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;\n      data.view[SETTER](index * BYTES + data.byteOffset, value, true);\n    };\n\n    var addElement = function (that, index) {\n      nativeDefineProperty(that, index, {\n        get: function () {\n          return getter(this, index);\n        },\n        set: function (value) {\n          return setter(this, index, value);\n        },\n        enumerable: true\n      });\n    };\n\n    if (!NATIVE_ARRAY_BUFFER_VIEWS) {\n      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {\n        anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);\n        var index = 0;\n        var byteOffset = 0;\n        var buffer, byteLength, length;\n        if (!isObject(data)) {\n          length = toIndex(data);\n          byteLength = length * BYTES;\n          buffer = new ArrayBuffer(byteLength);\n        } else if (isArrayBuffer(data)) {\n          buffer = data;\n          byteOffset = toOffset(offset, BYTES);\n          var $len = data.byteLength;\n          if ($length === undefined) {\n            if ($len % BYTES) throw RangeError(WRONG_LENGTH);\n            byteLength = $len - byteOffset;\n            if (byteLength < 0) throw RangeError(WRONG_LENGTH);\n          } else {\n            byteLength = toLength($length) * BYTES;\n            if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);\n          }\n          length = byteLength / BYTES;\n        } else if (isTypedArray(data)) {\n          return fromList(TypedArrayConstructor, data);\n        } else {\n          return typedArrayFrom.call(TypedArrayConstructor, data);\n        }\n        setInternalState(that, {\n          buffer: buffer,\n          byteOffset: byteOffset,\n          byteLength: byteLength,\n          length: length,\n          view: new DataView(buffer)\n        });\n        while (index < length) addElement(that, index++);\n      });\n\n      if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);\n      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create(TypedArrayPrototype);\n    } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS) {\n      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {\n        anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);\n        return inheritIfRequired(function () {\n          if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));\n          if (isArrayBuffer(data)) return $length !== undefined\n            ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)\n            : typedArrayOffset !== undefined\n              ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))\n              : new NativeTypedArrayConstructor(data);\n          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);\n          return typedArrayFrom.call(TypedArrayConstructor, data);\n        }(), dummy, TypedArrayConstructor);\n      });\n\n      if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);\n      forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {\n        if (!(key in TypedArrayConstructor)) {\n          createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);\n        }\n      });\n      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;\n    }\n\n    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);\n    }\n\n    if (TYPED_ARRAY_TAG) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);\n    }\n\n    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;\n\n    $({\n      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS\n    }, exported);\n\n    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {\n      createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);\n    }\n\n    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);\n    }\n\n    setSpecies(CONSTRUCTOR_NAME);\n  };\n} else module.exports = function () { /* empty */ };\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\nvar Iterators = require('../internals/iterators');\nvar IteratorsCore = require('../internals/iterators-core');\n\nvar IteratorPrototype = IteratorsCore.IteratorPrototype;\nvar BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;\nvar ITERATOR = wellKnownSymbol('iterator');\nvar KEYS = 'keys';\nvar VALUES = 'values';\nvar ENTRIES = 'entries';\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {\n  createIteratorConstructor(IteratorConstructor, NAME, next);\n\n  var getIterationMethod = function (KIND) {\n    if (KIND === DEFAULT && defaultIterator) return defaultIterator;\n    if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];\n    switch (KIND) {\n      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };\n      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };\n      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };\n    } return function () { return new IteratorConstructor(this); };\n  };\n\n  var TO_STRING_TAG = NAME + ' Iterator';\n  var INCORRECT_VALUES_NAME = false;\n  var IterablePrototype = Iterable.prototype;\n  var nativeIterator = IterablePrototype[ITERATOR]\n    || IterablePrototype['@@iterator']\n    || DEFAULT && IterablePrototype[DEFAULT];\n  var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);\n  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;\n  var CurrentIteratorPrototype, methods, KEY;\n\n  // fix native\n  if (anyNativeIterator) {\n    CurrentIteratorPrototype = getPrototypeOf(anyNativeIterator.call(new Iterable()));\n    if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {\n      if (!IS_PURE && getPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {\n        if (setPrototypeOf) {\n          setPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);\n        } else if (typeof CurrentIteratorPrototype[ITERATOR] != 'function') {\n          createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR, returnThis);\n        }\n      }\n      // Set @@toStringTag to native iterators\n      setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true, true);\n      if (IS_PURE) Iterators[TO_STRING_TAG] = returnThis;\n    }\n  }\n\n  // fix Array#{values, @@iterator}.name in V8 / FF\n  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {\n    INCORRECT_VALUES_NAME = true;\n    defaultIterator = function values() { return nativeIterator.call(this); };\n  }\n\n  // define iterator\n  if ((!IS_PURE || FORCED) && IterablePrototype[ITERATOR] !== defaultIterator) {\n    createNonEnumerableProperty(IterablePrototype, ITERATOR, defaultIterator);\n  }\n  Iterators[NAME] = defaultIterator;\n\n  // export additional methods\n  if (DEFAULT) {\n    methods = {\n      values: getIterationMethod(VALUES),\n      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),\n      entries: getIterationMethod(ENTRIES)\n    };\n    if (FORCED) for (KEY in methods) {\n      if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {\n        redefine(IterablePrototype, KEY, methods[KEY]);\n      }\n    } else $({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);\n  }\n\n  return methods;\n};\n","'use strict';\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar BUGGY_SAFARI_ITERATORS = false;\n\nvar returnThis = function () { return this; };\n\n// `%IteratorPrototype%` object\n// https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object\nvar IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;\n\nif ([].keys) {\n  arrayIterator = [].keys();\n  // Safari 8 has buggy iterators w/o `next`\n  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;\n  else {\n    PrototypeOfArrayIteratorPrototype = getPrototypeOf(getPrototypeOf(arrayIterator));\n    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;\n  }\n}\n\nif (IteratorPrototype == undefined) IteratorPrototype = {};\n\n// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()\nif (!IS_PURE && !has(IteratorPrototype, ITERATOR)) {\n  createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);\n}\n\nmodule.exports = {\n  IteratorPrototype: IteratorPrototype,\n  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\nvar whitespaces = require('../internals/whitespaces');\n\nvar whitespace = '[' + whitespaces + ']';\nvar ltrim = RegExp('^' + whitespace + whitespace + '*');\nvar rtrim = RegExp(whitespace + whitespace + '*$');\n\n// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation\nvar createMethod = function (TYPE) {\n  return function ($this) {\n    var string = String(requireObjectCoercible($this));\n    if (TYPE & 1) string = string.replace(ltrim, '');\n    if (TYPE & 2) string = string.replace(rtrim, '');\n    return string;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.{ trimLeft, trimStart }` methods\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trimstart\n  start: createMethod(1),\n  // `String.prototype.{ trimRight, trimEnd }` methods\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trimend\n  end: createMethod(2),\n  // `String.prototype.trim` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trim\n  trim: createMethod(3)\n};\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  function F() { /* empty */ }\n  F.prototype.constructor = null;\n  return Object.getPrototypeOf(new F()) !== F.prototype;\n});\n","'use strict';\nvar IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar Iterators = require('../internals/iterators');\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (IteratorConstructor, NAME, next) {\n  var TO_STRING_TAG = NAME + ' Iterator';\n  IteratorConstructor.prototype = create(IteratorPrototype, { next: createPropertyDescriptor(1, next) });\n  setToStringTag(IteratorConstructor, TO_STRING_TAG, false, true);\n  Iterators[TO_STRING_TAG] = returnThis;\n  return IteratorConstructor;\n};\n","var hiddenKeys = require('../internals/hidden-keys');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar defineProperty = require('../internals/object-define-property').f;\nvar uid = require('../internals/uid');\nvar FREEZING = require('../internals/freezing');\n\nvar METADATA = uid('meta');\nvar id = 0;\n\nvar isExtensible = Object.isExtensible || function () {\n  return true;\n};\n\nvar setMetadata = function (it) {\n  defineProperty(it, METADATA, { value: {\n    objectID: 'O' + ++id, // object ID\n    weakData: {}          // weak collections IDs\n  } });\n};\n\nvar fastKey = function (it, create) {\n  // return a primitive with prefix\n  if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return 'F';\n    // not necessary to add metadata\n    if (!create) return 'E';\n    // add missing metadata\n    setMetadata(it);\n  // return object ID\n  } return it[METADATA].objectID;\n};\n\nvar getWeakData = function (it, create) {\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return true;\n    // not necessary to add metadata\n    if (!create) return false;\n    // add missing metadata\n    setMetadata(it);\n  // return the store of weak collections IDs\n  } return it[METADATA].weakData;\n};\n\n// add metadata on freeze-family methods calling\nvar onFreeze = function (it) {\n  if (FREEZING && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);\n  return it;\n};\n\nvar meta = module.exports = {\n  REQUIRED: false,\n  fastKey: fastKey,\n  getWeakData: getWeakData,\n  onFreeze: onFreeze\n};\n\nhiddenKeys[METADATA] = true;\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toObject = require('../internals/to-object');\nvar nativeGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetPrototypeOf(1); });\n\n// `Object.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.getprototypeof\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(it) {\n    return nativeGetPrototypeOf(toObject(it));\n  }\n});\n\n","'use strict';\nvar bind = require('../internals/function-bind-context');\nvar toObject = require('../internals/to-object');\nvar callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\n// `Array.from` method implementation\n// https://tc39.github.io/ecma262/#sec-array.from\nmodule.exports = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n  var O = toObject(arrayLike);\n  var C = typeof this == 'function' ? this : Array;\n  var argumentsLength = arguments.length;\n  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n  var mapping = mapfn !== undefined;\n  var iteratorMethod = getIteratorMethod(O);\n  var index = 0;\n  var length, result, step, iterator, next, value;\n  if (mapping) mapfn = bind(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);\n  // if the target is not iterable or it's an array with the default iterator - use a simple case\n  if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {\n    iterator = iteratorMethod.call(O);\n    next = iterator.next;\n    result = new C();\n    for (;!(step = next.call(iterator)).done; index++) {\n      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;\n      createProperty(result, index, value);\n    }\n  } else {\n    length = toLength(O.length);\n    result = new C(length);\n    for (;length > index; index++) {\n      value = mapping ? mapfn(O[index], index) : O[index];\n      createProperty(result, index, value);\n    }\n  }\n  result.length = index;\n  return result;\n};\n","var $ = require('../internals/export');\nvar from = require('../internals/array-from');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\n\nvar INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {\n  Array.from(iterable);\n});\n\n// `Array.from` method\n// https://tc39.github.io/ecma262/#sec-array.from\n$({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {\n  from: from\n});\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it) && it !== null) {\n    throw TypeError(\"Can't set \" + String(it) + ' as a prototype');\n  } return it;\n};\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar sameValue = require('../internals/same-value');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@search logic\nfixRegExpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {\n  return [\n    // `String.prototype.search` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.search\n    function search(regexp) {\n      var O = requireObjectCoercible(this);\n      var searcher = regexp == undefined ? undefined : regexp[SEARCH];\n      return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));\n    },\n    // `RegExp.prototype[@@search]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@search\n    function (regexp) {\n      var res = maybeCallNative(nativeSearch, regexp, this);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var previousLastIndex = rx.lastIndex;\n      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;\n      var result = regExpExec(rx, S);\n      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;\n      return result === null ? -1 : result.index;\n    }\n  ];\n});\n","// a string of all valid unicode whitespaces\n// eslint-disable-next-line max-len\nmodule.exports = '\\u0009\\u000A\\u000B\\u000C\\u000D\\u0020\\u00A0\\u1680\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF';\n","// iterable DOM collections\n// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods\nmodule.exports = {\n  CSSRuleList: 0,\n  CSSStyleDeclaration: 0,\n  CSSValueList: 0,\n  ClientRectList: 0,\n  DOMRectList: 0,\n  DOMStringList: 0,\n  DOMTokenList: 1,\n  DataTransferItemList: 0,\n  FileList: 0,\n  HTMLAllCollection: 0,\n  HTMLCollection: 0,\n  HTMLFormElement: 0,\n  HTMLSelectElement: 0,\n  MediaList: 0,\n  MimeTypeArray: 0,\n  NamedNodeMap: 0,\n  NodeList: 1,\n  PaintRequestList: 0,\n  Plugin: 0,\n  PluginArray: 0,\n  SVGLengthList: 0,\n  SVGNumberList: 0,\n  SVGPathSegList: 0,\n  SVGPointList: 0,\n  SVGStringList: 0,\n  SVGTransformList: 0,\n  SourceBufferList: 0,\n  StyleSheetList: 0,\n  TextTrackCueList: 0,\n  TextTrackList: 0,\n  TouchList: 0\n};\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar forEach = require('../internals/array-for-each');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  // some Chrome versions have non-configurable methods on DOMTokenList\n  if (CollectionPrototype && CollectionPrototype.forEach !== forEach) try {\n    createNonEnumerableProperty(CollectionPrototype, 'forEach', forEach);\n  } catch (error) {\n    CollectionPrototype.forEach = forEach;\n  }\n}\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  return Object.isExtensible(Object.preventExtensions({}));\n});\n","var isObject = require('../internals/is-object');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\n\n// makes subclassing work correct for wrapped built-ins\nmodule.exports = function ($this, dummy, Wrapper) {\n  var NewTarget, NewTargetPrototype;\n  if (\n    // it can work only with native `setPrototypeOf`\n    setPrototypeOf &&\n    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this\n    typeof (NewTarget = dummy.constructor) == 'function' &&\n    NewTarget !== Wrapper &&\n    isObject(NewTargetPrototype = NewTarget.prototype) &&\n    NewTargetPrototype !== Wrapper.prototype\n  ) setPrototypeOf($this, NewTargetPrototype);\n  return $this;\n};\n","'use strict';\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.repeat` method implementation\n// https://tc39.github.io/ecma262/#sec-string.prototype.repeat\nmodule.exports = ''.repeat || function repeat(count) {\n  var str = String(requireObjectCoercible(this));\n  var result = '';\n  var n = toInteger(count);\n  if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');\n  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;\n  return result;\n};\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.string.iterator');\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar global = require('../internals/global');\nvar defineProperties = require('../internals/object-define-properties');\nvar redefine = require('../internals/redefine');\nvar anInstance = require('../internals/an-instance');\nvar has = require('../internals/has');\nvar assign = require('../internals/object-assign');\nvar arrayFrom = require('../internals/array-from');\nvar codeAt = require('../internals/string-multibyte').codeAt;\nvar toASCII = require('../internals/string-punycode-to-ascii');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar URLSearchParamsModule = require('../modules/web.url-search-params');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar NativeURL = global.URL;\nvar URLSearchParams = URLSearchParamsModule.URLSearchParams;\nvar getInternalSearchParamsState = URLSearchParamsModule.getState;\nvar setInternalState = InternalStateModule.set;\nvar getInternalURLState = InternalStateModule.getterFor('URL');\nvar floor = Math.floor;\nvar pow = Math.pow;\n\nvar INVALID_AUTHORITY = 'Invalid authority';\nvar INVALID_SCHEME = 'Invalid scheme';\nvar INVALID_HOST = 'Invalid host';\nvar INVALID_PORT = 'Invalid port';\n\nvar ALPHA = /[A-Za-z]/;\nvar ALPHANUMERIC = /[\\d+\\-.A-Za-z]/;\nvar DIGIT = /\\d/;\nvar HEX_START = /^(0x|0X)/;\nvar OCT = /^[0-7]+$/;\nvar DEC = /^\\d+$/;\nvar HEX = /^[\\dA-Fa-f]+$/;\n// eslint-disable-next-line no-control-regex\nvar FORBIDDEN_HOST_CODE_POINT = /[\\u0000\\u0009\\u000A\\u000D #%/:?@[\\\\]]/;\n// eslint-disable-next-line no-control-regex\nvar FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\\u0000\\u0009\\u000A\\u000D #/:?@[\\\\]]/;\n// eslint-disable-next-line no-control-regex\nvar LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\\u0000-\\u001F ]+|[\\u0000-\\u001F ]+$/g;\n// eslint-disable-next-line no-control-regex\nvar TAB_AND_NEW_LINE = /[\\u0009\\u000A\\u000D]/g;\nvar EOF;\n\nvar parseHost = function (url, input) {\n  var result, codePoints, index;\n  if (input.charAt(0) == '[') {\n    if (input.charAt(input.length - 1) != ']') return INVALID_HOST;\n    result = parseIPv6(input.slice(1, -1));\n    if (!result) return INVALID_HOST;\n    url.host = result;\n  // opaque host\n  } else if (!isSpecial(url)) {\n    if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;\n    result = '';\n    codePoints = arrayFrom(input);\n    for (index = 0; index < codePoints.length; index++) {\n      result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);\n    }\n    url.host = result;\n  } else {\n    input = toASCII(input);\n    if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;\n    result = parseIPv4(input);\n    if (result === null) return INVALID_HOST;\n    url.host = result;\n  }\n};\n\nvar parseIPv4 = function (input) {\n  var parts = input.split('.');\n  var partsLength, numbers, index, part, radix, number, ipv4;\n  if (parts.length && parts[parts.length - 1] == '') {\n    parts.pop();\n  }\n  partsLength = parts.length;\n  if (partsLength > 4) return input;\n  numbers = [];\n  for (index = 0; index < partsLength; index++) {\n    part = parts[index];\n    if (part == '') return input;\n    radix = 10;\n    if (part.length > 1 && part.charAt(0) == '0') {\n      radix = HEX_START.test(part) ? 16 : 8;\n      part = part.slice(radix == 8 ? 1 : 2);\n    }\n    if (part === '') {\n      number = 0;\n    } else {\n      if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;\n      number = parseInt(part, radix);\n    }\n    numbers.push(number);\n  }\n  for (index = 0; index < partsLength; index++) {\n    number = numbers[index];\n    if (index == partsLength - 1) {\n      if (number >= pow(256, 5 - partsLength)) return null;\n    } else if (number > 255) return null;\n  }\n  ipv4 = numbers.pop();\n  for (index = 0; index < numbers.length; index++) {\n    ipv4 += numbers[index] * pow(256, 3 - index);\n  }\n  return ipv4;\n};\n\n// eslint-disable-next-line max-statements\nvar parseIPv6 = function (input) {\n  var address = [0, 0, 0, 0, 0, 0, 0, 0];\n  var pieceIndex = 0;\n  var compress = null;\n  var pointer = 0;\n  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;\n\n  var char = function () {\n    return input.charAt(pointer);\n  };\n\n  if (char() == ':') {\n    if (input.charAt(1) != ':') return;\n    pointer += 2;\n    pieceIndex++;\n    compress = pieceIndex;\n  }\n  while (char()) {\n    if (pieceIndex == 8) return;\n    if (char() == ':') {\n      if (compress !== null) return;\n      pointer++;\n      pieceIndex++;\n      compress = pieceIndex;\n      continue;\n    }\n    value = length = 0;\n    while (length < 4 && HEX.test(char())) {\n      value = value * 16 + parseInt(char(), 16);\n      pointer++;\n      length++;\n    }\n    if (char() == '.') {\n      if (length == 0) return;\n      pointer -= length;\n      if (pieceIndex > 6) return;\n      numbersSeen = 0;\n      while (char()) {\n        ipv4Piece = null;\n        if (numbersSeen > 0) {\n          if (char() == '.' && numbersSeen < 4) pointer++;\n          else return;\n        }\n        if (!DIGIT.test(char())) return;\n        while (DIGIT.test(char())) {\n          number = parseInt(char(), 10);\n          if (ipv4Piece === null) ipv4Piece = number;\n          else if (ipv4Piece == 0) return;\n          else ipv4Piece = ipv4Piece * 10 + number;\n          if (ipv4Piece > 255) return;\n          pointer++;\n        }\n        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;\n        numbersSeen++;\n        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;\n      }\n      if (numbersSeen != 4) return;\n      break;\n    } else if (char() == ':') {\n      pointer++;\n      if (!char()) return;\n    } else if (char()) return;\n    address[pieceIndex++] = value;\n  }\n  if (compress !== null) {\n    swaps = pieceIndex - compress;\n    pieceIndex = 7;\n    while (pieceIndex != 0 && swaps > 0) {\n      swap = address[pieceIndex];\n      address[pieceIndex--] = address[compress + swaps - 1];\n      address[compress + --swaps] = swap;\n    }\n  } else if (pieceIndex != 8) return;\n  return address;\n};\n\nvar findLongestZeroSequence = function (ipv6) {\n  var maxIndex = null;\n  var maxLength = 1;\n  var currStart = null;\n  var currLength = 0;\n  var index = 0;\n  for (; index < 8; index++) {\n    if (ipv6[index] !== 0) {\n      if (currLength > maxLength) {\n        maxIndex = currStart;\n        maxLength = currLength;\n      }\n      currStart = null;\n      currLength = 0;\n    } else {\n      if (currStart === null) currStart = index;\n      ++currLength;\n    }\n  }\n  if (currLength > maxLength) {\n    maxIndex = currStart;\n    maxLength = currLength;\n  }\n  return maxIndex;\n};\n\nvar serializeHost = function (host) {\n  var result, index, compress, ignore0;\n  // ipv4\n  if (typeof host == 'number') {\n    result = [];\n    for (index = 0; index < 4; index++) {\n      result.unshift(host % 256);\n      host = floor(host / 256);\n    } return result.join('.');\n  // ipv6\n  } else if (typeof host == 'object') {\n    result = '';\n    compress = findLongestZeroSequence(host);\n    for (index = 0; index < 8; index++) {\n      if (ignore0 && host[index] === 0) continue;\n      if (ignore0) ignore0 = false;\n      if (compress === index) {\n        result += index ? ':' : '::';\n        ignore0 = true;\n      } else {\n        result += host[index].toString(16);\n        if (index < 7) result += ':';\n      }\n    }\n    return '[' + result + ']';\n  } return host;\n};\n\nvar C0ControlPercentEncodeSet = {};\nvar fragmentPercentEncodeSet = assign({}, C0ControlPercentEncodeSet, {\n  ' ': 1, '\"': 1, '<': 1, '>': 1, '`': 1\n});\nvar pathPercentEncodeSet = assign({}, fragmentPercentEncodeSet, {\n  '#': 1, '?': 1, '{': 1, '}': 1\n});\nvar userinfoPercentEncodeSet = assign({}, pathPercentEncodeSet, {\n  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\\\': 1, ']': 1, '^': 1, '|': 1\n});\n\nvar percentEncode = function (char, set) {\n  var code = codeAt(char, 0);\n  return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);\n};\n\nvar specialSchemes = {\n  ftp: 21,\n  file: null,\n  http: 80,\n  https: 443,\n  ws: 80,\n  wss: 443\n};\n\nvar isSpecial = function (url) {\n  return has(specialSchemes, url.scheme);\n};\n\nvar includesCredentials = function (url) {\n  return url.username != '' || url.password != '';\n};\n\nvar cannotHaveUsernamePasswordPort = function (url) {\n  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';\n};\n\nvar isWindowsDriveLetter = function (string, normalized) {\n  var second;\n  return string.length == 2 && ALPHA.test(string.charAt(0))\n    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));\n};\n\nvar startsWithWindowsDriveLetter = function (string) {\n  var third;\n  return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (\n    string.length == 2 ||\n    ((third = string.charAt(2)) === '/' || third === '\\\\' || third === '?' || third === '#')\n  );\n};\n\nvar shortenURLsPath = function (url) {\n  var path = url.path;\n  var pathSize = path.length;\n  if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {\n    path.pop();\n  }\n};\n\nvar isSingleDot = function (segment) {\n  return segment === '.' || segment.toLowerCase() === '%2e';\n};\n\nvar isDoubleDot = function (segment) {\n  segment = segment.toLowerCase();\n  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';\n};\n\n// States:\nvar SCHEME_START = {};\nvar SCHEME = {};\nvar NO_SCHEME = {};\nvar SPECIAL_RELATIVE_OR_AUTHORITY = {};\nvar PATH_OR_AUTHORITY = {};\nvar RELATIVE = {};\nvar RELATIVE_SLASH = {};\nvar SPECIAL_AUTHORITY_SLASHES = {};\nvar SPECIAL_AUTHORITY_IGNORE_SLASHES = {};\nvar AUTHORITY = {};\nvar HOST = {};\nvar HOSTNAME = {};\nvar PORT = {};\nvar FILE = {};\nvar FILE_SLASH = {};\nvar FILE_HOST = {};\nvar PATH_START = {};\nvar PATH = {};\nvar CANNOT_BE_A_BASE_URL_PATH = {};\nvar QUERY = {};\nvar FRAGMENT = {};\n\n// eslint-disable-next-line max-statements\nvar parseURL = function (url, input, stateOverride, base) {\n  var state = stateOverride || SCHEME_START;\n  var pointer = 0;\n  var buffer = '';\n  var seenAt = false;\n  var seenBracket = false;\n  var seenPasswordToken = false;\n  var codePoints, char, bufferCodePoints, failure;\n\n  if (!stateOverride) {\n    url.scheme = '';\n    url.username = '';\n    url.password = '';\n    url.host = null;\n    url.port = null;\n    url.path = [];\n    url.query = null;\n    url.fragment = null;\n    url.cannotBeABaseURL = false;\n    input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');\n  }\n\n  input = input.replace(TAB_AND_NEW_LINE, '');\n\n  codePoints = arrayFrom(input);\n\n  while (pointer <= codePoints.length) {\n    char = codePoints[pointer];\n    switch (state) {\n      case SCHEME_START:\n        if (char && ALPHA.test(char)) {\n          buffer += char.toLowerCase();\n          state = SCHEME;\n        } else if (!stateOverride) {\n          state = NO_SCHEME;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case SCHEME:\n        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {\n          buffer += char.toLowerCase();\n        } else if (char == ':') {\n          if (stateOverride && (\n            (isSpecial(url) != has(specialSchemes, buffer)) ||\n            (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||\n            (url.scheme == 'file' && !url.host)\n          )) return;\n          url.scheme = buffer;\n          if (stateOverride) {\n            if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;\n            return;\n          }\n          buffer = '';\n          if (url.scheme == 'file') {\n            state = FILE;\n          } else if (isSpecial(url) && base && base.scheme == url.scheme) {\n            state = SPECIAL_RELATIVE_OR_AUTHORITY;\n          } else if (isSpecial(url)) {\n            state = SPECIAL_AUTHORITY_SLASHES;\n          } else if (codePoints[pointer + 1] == '/') {\n            state = PATH_OR_AUTHORITY;\n            pointer++;\n          } else {\n            url.cannotBeABaseURL = true;\n            url.path.push('');\n            state = CANNOT_BE_A_BASE_URL_PATH;\n          }\n        } else if (!stateOverride) {\n          buffer = '';\n          state = NO_SCHEME;\n          pointer = 0;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case NO_SCHEME:\n        if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;\n        if (base.cannotBeABaseURL && char == '#') {\n          url.scheme = base.scheme;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          url.cannotBeABaseURL = true;\n          state = FRAGMENT;\n          break;\n        }\n        state = base.scheme == 'file' ? FILE : RELATIVE;\n        continue;\n\n      case SPECIAL_RELATIVE_OR_AUTHORITY:\n        if (char == '/' && codePoints[pointer + 1] == '/') {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n          pointer++;\n        } else {\n          state = RELATIVE;\n          continue;\n        } break;\n\n      case PATH_OR_AUTHORITY:\n        if (char == '/') {\n          state = AUTHORITY;\n          break;\n        } else {\n          state = PATH;\n          continue;\n        }\n\n      case RELATIVE:\n        url.scheme = base.scheme;\n        if (char == EOF) {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n        } else if (char == '/' || (char == '\\\\' && isSpecial(url))) {\n          state = RELATIVE_SLASH;\n        } else if (char == '?') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          state = FRAGMENT;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.path.pop();\n          state = PATH;\n          continue;\n        } break;\n\n      case RELATIVE_SLASH:\n        if (isSpecial(url) && (char == '/' || char == '\\\\')) {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        } else if (char == '/') {\n          state = AUTHORITY;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          state = PATH;\n          continue;\n        } break;\n\n      case SPECIAL_AUTHORITY_SLASHES:\n        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;\n        pointer++;\n        break;\n\n      case SPECIAL_AUTHORITY_IGNORE_SLASHES:\n        if (char != '/' && char != '\\\\') {\n          state = AUTHORITY;\n          continue;\n        } break;\n\n      case AUTHORITY:\n        if (char == '@') {\n          if (seenAt) buffer = '%40' + buffer;\n          seenAt = true;\n          bufferCodePoints = arrayFrom(buffer);\n          for (var i = 0; i < bufferCodePoints.length; i++) {\n            var codePoint = bufferCodePoints[i];\n            if (codePoint == ':' && !seenPasswordToken) {\n              seenPasswordToken = true;\n              continue;\n            }\n            var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);\n            if (seenPasswordToken) url.password += encodedCodePoints;\n            else url.username += encodedCodePoints;\n          }\n          buffer = '';\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (seenAt && buffer == '') return INVALID_AUTHORITY;\n          pointer -= arrayFrom(buffer).length + 1;\n          buffer = '';\n          state = HOST;\n        } else buffer += char;\n        break;\n\n      case HOST:\n      case HOSTNAME:\n        if (stateOverride && url.scheme == 'file') {\n          state = FILE_HOST;\n          continue;\n        } else if (char == ':' && !seenBracket) {\n          if (buffer == '') return INVALID_HOST;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PORT;\n          if (stateOverride == HOSTNAME) return;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (isSpecial(url) && buffer == '') return INVALID_HOST;\n          if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PATH_START;\n          if (stateOverride) return;\n          continue;\n        } else {\n          if (char == '[') seenBracket = true;\n          else if (char == ']') seenBracket = false;\n          buffer += char;\n        } break;\n\n      case PORT:\n        if (DIGIT.test(char)) {\n          buffer += char;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          stateOverride\n        ) {\n          if (buffer != '') {\n            var port = parseInt(buffer, 10);\n            if (port > 0xFFFF) return INVALID_PORT;\n            url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;\n            buffer = '';\n          }\n          if (stateOverride) return;\n          state = PATH_START;\n          continue;\n        } else return INVALID_PORT;\n        break;\n\n      case FILE:\n        url.scheme = 'file';\n        if (char == '/' || char == '\\\\') state = FILE_SLASH;\n        else if (base && base.scheme == 'file') {\n          if (char == EOF) {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n          } else if (char == '?') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n            url.fragment = '';\n            state = FRAGMENT;\n          } else {\n            if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n              url.host = base.host;\n              url.path = base.path.slice();\n              shortenURLsPath(url);\n            }\n            state = PATH;\n            continue;\n          }\n        } else {\n          state = PATH;\n          continue;\n        } break;\n\n      case FILE_SLASH:\n        if (char == '/' || char == '\\\\') {\n          state = FILE_HOST;\n          break;\n        }\n        if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n          if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);\n          else url.host = base.host;\n        }\n        state = PATH;\n        continue;\n\n      case FILE_HOST:\n        if (char == EOF || char == '/' || char == '\\\\' || char == '?' || char == '#') {\n          if (!stateOverride && isWindowsDriveLetter(buffer)) {\n            state = PATH;\n          } else if (buffer == '') {\n            url.host = '';\n            if (stateOverride) return;\n            state = PATH_START;\n          } else {\n            failure = parseHost(url, buffer);\n            if (failure) return failure;\n            if (url.host == 'localhost') url.host = '';\n            if (stateOverride) return;\n            buffer = '';\n            state = PATH_START;\n          } continue;\n        } else buffer += char;\n        break;\n\n      case PATH_START:\n        if (isSpecial(url)) {\n          state = PATH;\n          if (char != '/' && char != '\\\\') continue;\n        } else if (!stateOverride && char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          state = PATH;\n          if (char != '/') continue;\n        } break;\n\n      case PATH:\n        if (\n          char == EOF || char == '/' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          (!stateOverride && (char == '?' || char == '#'))\n        ) {\n          if (isDoubleDot(buffer)) {\n            shortenURLsPath(url);\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else if (isSingleDot(buffer)) {\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else {\n            if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {\n              if (url.host) url.host = '';\n              buffer = buffer.charAt(0) + ':'; // normalize windows drive letter\n            }\n            url.path.push(buffer);\n          }\n          buffer = '';\n          if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {\n            while (url.path.length > 1 && url.path[0] === '') {\n              url.path.shift();\n            }\n          }\n          if (char == '?') {\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.fragment = '';\n            state = FRAGMENT;\n          }\n        } else {\n          buffer += percentEncode(char, pathPercentEncodeSet);\n        } break;\n\n      case CANNOT_BE_A_BASE_URL_PATH:\n        if (char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case QUERY:\n        if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          if (char == \"'\" && isSpecial(url)) url.query += '%27';\n          else if (char == '#') url.query += '%23';\n          else url.query += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case FRAGMENT:\n        if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);\n        break;\n    }\n\n    pointer++;\n  }\n};\n\n// `URL` constructor\n// https://url.spec.whatwg.org/#url-class\nvar URLConstructor = function URL(url /* , base */) {\n  var that = anInstance(this, URLConstructor, 'URL');\n  var base = arguments.length > 1 ? arguments[1] : undefined;\n  var urlString = String(url);\n  var state = setInternalState(that, { type: 'URL' });\n  var baseState, failure;\n  if (base !== undefined) {\n    if (base instanceof URLConstructor) baseState = getInternalURLState(base);\n    else {\n      failure = parseURL(baseState = {}, String(base));\n      if (failure) throw TypeError(failure);\n    }\n  }\n  failure = parseURL(state, urlString, null, baseState);\n  if (failure) throw TypeError(failure);\n  var searchParams = state.searchParams = new URLSearchParams();\n  var searchParamsState = getInternalSearchParamsState(searchParams);\n  searchParamsState.updateSearchParams(state.query);\n  searchParamsState.updateURL = function () {\n    state.query = String(searchParams) || null;\n  };\n  if (!DESCRIPTORS) {\n    that.href = serializeURL.call(that);\n    that.origin = getOrigin.call(that);\n    that.protocol = getProtocol.call(that);\n    that.username = getUsername.call(that);\n    that.password = getPassword.call(that);\n    that.host = getHost.call(that);\n    that.hostname = getHostname.call(that);\n    that.port = getPort.call(that);\n    that.pathname = getPathname.call(that);\n    that.search = getSearch.call(that);\n    that.searchParams = getSearchParams.call(that);\n    that.hash = getHash.call(that);\n  }\n};\n\nvar URLPrototype = URLConstructor.prototype;\n\nvar serializeURL = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var username = url.username;\n  var password = url.password;\n  var host = url.host;\n  var port = url.port;\n  var path = url.path;\n  var query = url.query;\n  var fragment = url.fragment;\n  var output = scheme + ':';\n  if (host !== null) {\n    output += '//';\n    if (includesCredentials(url)) {\n      output += username + (password ? ':' + password : '') + '@';\n    }\n    output += serializeHost(host);\n    if (port !== null) output += ':' + port;\n  } else if (scheme == 'file') output += '//';\n  output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n  if (query !== null) output += '?' + query;\n  if (fragment !== null) output += '#' + fragment;\n  return output;\n};\n\nvar getOrigin = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var port = url.port;\n  if (scheme == 'blob') try {\n    return new URL(scheme.path[0]).origin;\n  } catch (error) {\n    return 'null';\n  }\n  if (scheme == 'file' || !isSpecial(url)) return 'null';\n  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');\n};\n\nvar getProtocol = function () {\n  return getInternalURLState(this).scheme + ':';\n};\n\nvar getUsername = function () {\n  return getInternalURLState(this).username;\n};\n\nvar getPassword = function () {\n  return getInternalURLState(this).password;\n};\n\nvar getHost = function () {\n  var url = getInternalURLState(this);\n  var host = url.host;\n  var port = url.port;\n  return host === null ? ''\n    : port === null ? serializeHost(host)\n    : serializeHost(host) + ':' + port;\n};\n\nvar getHostname = function () {\n  var host = getInternalURLState(this).host;\n  return host === null ? '' : serializeHost(host);\n};\n\nvar getPort = function () {\n  var port = getInternalURLState(this).port;\n  return port === null ? '' : String(port);\n};\n\nvar getPathname = function () {\n  var url = getInternalURLState(this);\n  var path = url.path;\n  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n};\n\nvar getSearch = function () {\n  var query = getInternalURLState(this).query;\n  return query ? '?' + query : '';\n};\n\nvar getSearchParams = function () {\n  return getInternalURLState(this).searchParams;\n};\n\nvar getHash = function () {\n  var fragment = getInternalURLState(this).fragment;\n  return fragment ? '#' + fragment : '';\n};\n\nvar accessorDescriptor = function (getter, setter) {\n  return { get: getter, set: setter, configurable: true, enumerable: true };\n};\n\nif (DESCRIPTORS) {\n  defineProperties(URLPrototype, {\n    // `URL.prototype.href` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-href\n    href: accessorDescriptor(serializeURL, function (href) {\n      var url = getInternalURLState(this);\n      var urlString = String(href);\n      var failure = parseURL(url, urlString);\n      if (failure) throw TypeError(failure);\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.origin` getter\n    // https://url.spec.whatwg.org/#dom-url-origin\n    origin: accessorDescriptor(getOrigin),\n    // `URL.prototype.protocol` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-protocol\n    protocol: accessorDescriptor(getProtocol, function (protocol) {\n      var url = getInternalURLState(this);\n      parseURL(url, String(protocol) + ':', SCHEME_START);\n    }),\n    // `URL.prototype.username` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-username\n    username: accessorDescriptor(getUsername, function (username) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(username));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.username = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.password` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-password\n    password: accessorDescriptor(getPassword, function (password) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(password));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.password = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.host` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-host\n    host: accessorDescriptor(getHost, function (host) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(host), HOST);\n    }),\n    // `URL.prototype.hostname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hostname\n    hostname: accessorDescriptor(getHostname, function (hostname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(hostname), HOSTNAME);\n    }),\n    // `URL.prototype.port` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-port\n    port: accessorDescriptor(getPort, function (port) {\n      var url = getInternalURLState(this);\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      port = String(port);\n      if (port == '') url.port = null;\n      else parseURL(url, port, PORT);\n    }),\n    // `URL.prototype.pathname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-pathname\n    pathname: accessorDescriptor(getPathname, function (pathname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      url.path = [];\n      parseURL(url, pathname + '', PATH_START);\n    }),\n    // `URL.prototype.search` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-search\n    search: accessorDescriptor(getSearch, function (search) {\n      var url = getInternalURLState(this);\n      search = String(search);\n      if (search == '') {\n        url.query = null;\n      } else {\n        if ('?' == search.charAt(0)) search = search.slice(1);\n        url.query = '';\n        parseURL(url, search, QUERY);\n      }\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.searchParams` getter\n    // https://url.spec.whatwg.org/#dom-url-searchparams\n    searchParams: accessorDescriptor(getSearchParams),\n    // `URL.prototype.hash` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hash\n    hash: accessorDescriptor(getHash, function (hash) {\n      var url = getInternalURLState(this);\n      hash = String(hash);\n      if (hash == '') {\n        url.fragment = null;\n        return;\n      }\n      if ('#' == hash.charAt(0)) hash = hash.slice(1);\n      url.fragment = '';\n      parseURL(url, hash, FRAGMENT);\n    })\n  });\n}\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\nredefine(URLPrototype, 'toJSON', function toJSON() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\n// `URL.prototype.toString` method\n// https://url.spec.whatwg.org/#URL-stringification-behavior\nredefine(URLPrototype, 'toString', function toString() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\nif (NativeURL) {\n  var nativeCreateObjectURL = NativeURL.createObjectURL;\n  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;\n  // `URL.createObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n  // eslint-disable-next-line no-unused-vars\n  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {\n    return nativeCreateObjectURL.apply(NativeURL, arguments);\n  });\n  // `URL.revokeObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL\n  // eslint-disable-next-line no-unused-vars\n  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {\n    return nativeRevokeObjectURL.apply(NativeURL, arguments);\n  });\n}\n\nsetToStringTag(URLConstructor, 'URL');\n\n$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {\n  URL: URLConstructor\n});\n","'use strict';\nvar IS_PURE = require('../internals/is-pure');\nvar global = require('../internals/global');\nvar fails = require('../internals/fails');\n\n// Forced replacement object prototype accessors methods\nmodule.exports = IS_PURE || !fails(function () {\n  var key = Math.random();\n  // In FF throws only define methods\n  // eslint-disable-next-line no-undef, no-useless-call\n  __defineSetter__.call(null, key, function () { /* empty */ });\n  delete global[key];\n});\n","var aFunction = require('../internals/a-function');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\nvar toLength = require('../internals/to-length');\n\n// `Array.prototype.{ reduce, reduceRight }` methods implementation\nvar createMethod = function (IS_RIGHT) {\n  return function (that, callbackfn, argumentsLength, memo) {\n    aFunction(callbackfn);\n    var O = toObject(that);\n    var self = IndexedObject(O);\n    var length = toLength(O.length);\n    var index = IS_RIGHT ? length - 1 : 0;\n    var i = IS_RIGHT ? -1 : 1;\n    if (argumentsLength < 2) while (true) {\n      if (index in self) {\n        memo = self[index];\n        index += i;\n        break;\n      }\n      index += i;\n      if (IS_RIGHT ? index < 0 : length <= index) {\n        throw TypeError('Reduce of empty array with no initial value');\n      }\n    }\n    for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {\n      memo = callbackfn(memo, self[index], index, O);\n    }\n    return memo;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.reduce` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.reduce\n  left: createMethod(false),\n  // `Array.prototype.reduceRight` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright\n  right: createMethod(true)\n};\n","var nativeExpm1 = Math.expm1;\nvar exp = Math.exp;\n\n// `Math.expm1` method implementation\n// https://tc39.github.io/ecma262/#sec-math.expm1\nmodule.exports = (!nativeExpm1\n  // Old FF bug\n  || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168\n  // Tor Browser bug\n  || nativeExpm1(-2e-17) != -2e-17\n) ? function expm1(x) {\n  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp(x) - 1;\n} : nativeExpm1;\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar InternalMetadataModule = require('../internals/internal-metadata');\nvar iterate = require('../internals/iterate');\nvar anInstance = require('../internals/an-instance');\nvar isObject = require('../internals/is-object');\nvar fails = require('../internals/fails');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar inheritIfRequired = require('../internals/inherit-if-required');\n\nmodule.exports = function (CONSTRUCTOR_NAME, wrapper, common) {\n  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;\n  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;\n  var ADDER = IS_MAP ? 'set' : 'add';\n  var NativeConstructor = global[CONSTRUCTOR_NAME];\n  var NativePrototype = NativeConstructor && NativeConstructor.prototype;\n  var Constructor = NativeConstructor;\n  var exported = {};\n\n  var fixMethod = function (KEY) {\n    var nativeMethod = NativePrototype[KEY];\n    redefine(NativePrototype, KEY,\n      KEY == 'add' ? function add(value) {\n        nativeMethod.call(this, value === 0 ? 0 : value);\n        return this;\n      } : KEY == 'delete' ? function (key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'get' ? function get(key) {\n        return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'has' ? function has(key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : function set(key, value) {\n        nativeMethod.call(this, key === 0 ? 0 : key, value);\n        return this;\n      }\n    );\n  };\n\n  // eslint-disable-next-line max-len\n  if (isForced(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {\n    new NativeConstructor().entries().next();\n  })))) {\n    // create collection constructor\n    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);\n    InternalMetadataModule.REQUIRED = true;\n  } else if (isForced(CONSTRUCTOR_NAME, true)) {\n    var instance = new Constructor();\n    // early implementations not supports chaining\n    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;\n    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false\n    var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });\n    // most early implementations doesn't supports iterables, most modern - not close it correctly\n    // eslint-disable-next-line no-new\n    var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });\n    // for early implementations -0 and +0 not the same\n    var BUGGY_ZERO = !IS_WEAK && fails(function () {\n      // V8 ~ Chromium 42- fails only with 5+ elements\n      var $instance = new NativeConstructor();\n      var index = 5;\n      while (index--) $instance[ADDER](index, index);\n      return !$instance.has(-0);\n    });\n\n    if (!ACCEPT_ITERABLES) {\n      Constructor = wrapper(function (dummy, iterable) {\n        anInstance(dummy, Constructor, CONSTRUCTOR_NAME);\n        var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);\n        if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n        return that;\n      });\n      Constructor.prototype = NativePrototype;\n      NativePrototype.constructor = Constructor;\n    }\n\n    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {\n      fixMethod('delete');\n      fixMethod('has');\n      IS_MAP && fixMethod('get');\n    }\n\n    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);\n\n    // weak collections should not contains .clear method\n    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;\n  }\n\n  exported[CONSTRUCTOR_NAME] = Constructor;\n  $({ global: true, forced: Constructor != NativeConstructor }, exported);\n\n  setToStringTag(Constructor, CONSTRUCTOR_NAME);\n\n  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);\n\n  return Constructor;\n};\n","'use strict';\nvar global = require('../internals/global');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefineAll = require('../internals/redefine-all');\nvar fails = require('../internals/fails');\nvar anInstance = require('../internals/an-instance');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar toIndex = require('../internals/to-index');\nvar IEEE754 = require('../internals/ieee754');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar arrayFill = require('../internals/array-fill');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar DATA_VIEW = 'DataView';\nvar PROTOTYPE = 'prototype';\nvar WRONG_LENGTH = 'Wrong length';\nvar WRONG_INDEX = 'Wrong index';\nvar NativeArrayBuffer = global[ARRAY_BUFFER];\nvar $ArrayBuffer = NativeArrayBuffer;\nvar $DataView = global[DATA_VIEW];\nvar $DataViewPrototype = $DataView && $DataView[PROTOTYPE];\nvar ObjectPrototype = Object.prototype;\nvar RangeError = global.RangeError;\n\nvar packIEEE754 = IEEE754.pack;\nvar unpackIEEE754 = IEEE754.unpack;\n\nvar packInt8 = function (number) {\n  return [number & 0xFF];\n};\n\nvar packInt16 = function (number) {\n  return [number & 0xFF, number >> 8 & 0xFF];\n};\n\nvar packInt32 = function (number) {\n  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];\n};\n\nvar unpackInt32 = function (buffer) {\n  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];\n};\n\nvar packFloat32 = function (number) {\n  return packIEEE754(number, 23, 4);\n};\n\nvar packFloat64 = function (number) {\n  return packIEEE754(number, 52, 8);\n};\n\nvar addGetter = function (Constructor, key) {\n  defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } });\n};\n\nvar get = function (view, count, index, isLittleEndian) {\n  var intIndex = toIndex(index);\n  var store = getInternalState(view);\n  if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);\n  var bytes = getInternalState(store.buffer).bytes;\n  var start = intIndex + store.byteOffset;\n  var pack = bytes.slice(start, start + count);\n  return isLittleEndian ? pack : pack.reverse();\n};\n\nvar set = function (view, count, index, conversion, value, isLittleEndian) {\n  var intIndex = toIndex(index);\n  var store = getInternalState(view);\n  if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);\n  var bytes = getInternalState(store.buffer).bytes;\n  var start = intIndex + store.byteOffset;\n  var pack = conversion(+value);\n  for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];\n};\n\nif (!NATIVE_ARRAY_BUFFER) {\n  $ArrayBuffer = function ArrayBuffer(length) {\n    anInstance(this, $ArrayBuffer, ARRAY_BUFFER);\n    var byteLength = toIndex(length);\n    setInternalState(this, {\n      bytes: arrayFill.call(new Array(byteLength), 0),\n      byteLength: byteLength\n    });\n    if (!DESCRIPTORS) this.byteLength = byteLength;\n  };\n\n  $DataView = function DataView(buffer, byteOffset, byteLength) {\n    anInstance(this, $DataView, DATA_VIEW);\n    anInstance(buffer, $ArrayBuffer, DATA_VIEW);\n    var bufferLength = getInternalState(buffer).byteLength;\n    var offset = toInteger(byteOffset);\n    if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset');\n    byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);\n    if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);\n    setInternalState(this, {\n      buffer: buffer,\n      byteLength: byteLength,\n      byteOffset: offset\n    });\n    if (!DESCRIPTORS) {\n      this.buffer = buffer;\n      this.byteLength = byteLength;\n      this.byteOffset = offset;\n    }\n  };\n\n  if (DESCRIPTORS) {\n    addGetter($ArrayBuffer, 'byteLength');\n    addGetter($DataView, 'buffer');\n    addGetter($DataView, 'byteLength');\n    addGetter($DataView, 'byteOffset');\n  }\n\n  redefineAll($DataView[PROTOTYPE], {\n    getInt8: function getInt8(byteOffset) {\n      return get(this, 1, byteOffset)[0] << 24 >> 24;\n    },\n    getUint8: function getUint8(byteOffset) {\n      return get(this, 1, byteOffset)[0];\n    },\n    getInt16: function getInt16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);\n      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;\n    },\n    getUint16: function getUint16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);\n      return bytes[1] << 8 | bytes[0];\n    },\n    getInt32: function getInt32(byteOffset /* , littleEndian */) {\n      return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));\n    },\n    getUint32: function getUint32(byteOffset /* , littleEndian */) {\n      return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;\n    },\n    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);\n    },\n    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);\n    },\n    setInt8: function setInt8(byteOffset, value) {\n      set(this, 1, byteOffset, packInt8, value);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      set(this, 1, byteOffset, packInt8, value);\n    },\n    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {\n      set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);\n    }\n  });\n} else {\n  if (!fails(function () {\n    NativeArrayBuffer(1);\n  }) || !fails(function () {\n    new NativeArrayBuffer(-1); // eslint-disable-line no-new\n  }) || fails(function () {\n    new NativeArrayBuffer(); // eslint-disable-line no-new\n    new NativeArrayBuffer(1.5); // eslint-disable-line no-new\n    new NativeArrayBuffer(NaN); // eslint-disable-line no-new\n    return NativeArrayBuffer.name != ARRAY_BUFFER;\n  })) {\n    $ArrayBuffer = function ArrayBuffer(length) {\n      anInstance(this, $ArrayBuffer);\n      return new NativeArrayBuffer(toIndex(length));\n    };\n    var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer[PROTOTYPE];\n    for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) {\n      if (!((key = keys[j++]) in $ArrayBuffer)) {\n        createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);\n      }\n    }\n    ArrayBufferPrototype.constructor = $ArrayBuffer;\n  }\n\n  // WebKit bug - the same parent prototype for typed arrays and data view\n  if (setPrototypeOf && getPrototypeOf($DataViewPrototype) !== ObjectPrototype) {\n    setPrototypeOf($DataViewPrototype, ObjectPrototype);\n  }\n\n  // iOS Safari 7.x bug\n  var testView = new $DataView(new $ArrayBuffer(2));\n  var nativeSetInt8 = $DataViewPrototype.setInt8;\n  testView.setInt8(0, 2147483648);\n  testView.setInt8(1, 2147483649);\n  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {\n    setInt8: function setInt8(byteOffset, value) {\n      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);\n    }\n  }, { unsafe: true });\n}\n\nsetToStringTag($ArrayBuffer, ARRAY_BUFFER);\nsetToStringTag($DataView, DATA_VIEW);\n\nmodule.exports = {\n  ArrayBuffer: $ArrayBuffer,\n  DataView: $DataView\n};\n","var isRegExp = require('../internals/is-regexp');\n\nmodule.exports = function (it) {\n  if (isRegExp(it)) {\n    throw TypeError(\"The method doesn't accept regular expressions\");\n  } return it;\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\nmodule.exports = function (METHOD_NAME) {\n  var regexp = /./;\n  try {\n    '/./'[METHOD_NAME](regexp);\n  } catch (e) {\n    try {\n      regexp[MATCH] = false;\n      return '/./'[METHOD_NAME](regexp);\n    } catch (f) { /* empty */ }\n  } return false;\n};\n","var fails = require('../internals/fails');\nvar whitespaces = require('../internals/whitespaces');\n\nvar non = '\\u200B\\u0085\\u180E';\n\n// check that a method works with the correct list\n// of whitespaces and has a correct name\nmodule.exports = function (METHOD_NAME) {\n  return fails(function () {\n    return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;\n  });\n};\n","'use strict';\nvar $forEach = require('../internals/array-iteration').forEach;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('forEach');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('forEach');\n\n// `Array.prototype.forEach` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\nmodule.exports = (!STRICT_METHOD || !USES_TO_LENGTH) ? function forEach(callbackfn /* , thisArg */) {\n  return $forEach(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n} : [].forEach;\n","var classof = require('../internals/classof-raw');\n\n// `thisNumberValue` abstract operation\n// https://tc39.github.io/ecma262/#sec-thisnumbervalue\nmodule.exports = function (value) {\n  if (typeof value != 'number' && classof(value) != 'Number') {\n    throw TypeError('Incorrect invocation');\n  }\n  return +value;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.small` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.small\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('small') }, {\n  small: function small() {\n    return createHTML(this, 'small', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar toInteger = require('../internals/to-integer');\nvar thisNumberValue = require('../internals/this-number-value');\nvar repeat = require('../internals/string-repeat');\nvar fails = require('../internals/fails');\n\nvar nativeToFixed = 1.0.toFixed;\nvar floor = Math.floor;\n\nvar pow = function (x, n, acc) {\n  return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);\n};\n\nvar log = function (x) {\n  var n = 0;\n  var x2 = x;\n  while (x2 >= 4096) {\n    n += 12;\n    x2 /= 4096;\n  }\n  while (x2 >= 2) {\n    n += 1;\n    x2 /= 2;\n  } return n;\n};\n\nvar FORCED = nativeToFixed && (\n  0.00008.toFixed(3) !== '0.000' ||\n  0.9.toFixed(0) !== '1' ||\n  1.255.toFixed(2) !== '1.25' ||\n  1000000000000000128.0.toFixed(0) !== '1000000000000000128'\n) || !fails(function () {\n  // V8 ~ Android 4.3-\n  nativeToFixed.call({});\n});\n\n// `Number.prototype.toFixed` method\n// https://tc39.github.io/ecma262/#sec-number.prototype.tofixed\n$({ target: 'Number', proto: true, forced: FORCED }, {\n  // eslint-disable-next-line max-statements\n  toFixed: function toFixed(fractionDigits) {\n    var number = thisNumberValue(this);\n    var fractDigits = toInteger(fractionDigits);\n    var data = [0, 0, 0, 0, 0, 0];\n    var sign = '';\n    var result = '0';\n    var e, z, j, k;\n\n    var multiply = function (n, c) {\n      var index = -1;\n      var c2 = c;\n      while (++index < 6) {\n        c2 += n * data[index];\n        data[index] = c2 % 1e7;\n        c2 = floor(c2 / 1e7);\n      }\n    };\n\n    var divide = function (n) {\n      var index = 6;\n      var c = 0;\n      while (--index >= 0) {\n        c += data[index];\n        data[index] = floor(c / n);\n        c = (c % n) * 1e7;\n      }\n    };\n\n    var dataToString = function () {\n      var index = 6;\n      var s = '';\n      while (--index >= 0) {\n        if (s !== '' || index === 0 || data[index] !== 0) {\n          var t = String(data[index]);\n          s = s === '' ? t : s + repeat.call('0', 7 - t.length) + t;\n        }\n      } return s;\n    };\n\n    if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');\n    // eslint-disable-next-line no-self-compare\n    if (number != number) return 'NaN';\n    if (number <= -1e21 || number >= 1e21) return String(number);\n    if (number < 0) {\n      sign = '-';\n      number = -number;\n    }\n    if (number > 1e-21) {\n      e = log(number * pow(2, 69, 1)) - 69;\n      z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);\n      z *= 0x10000000000000;\n      e = 52 - e;\n      if (e > 0) {\n        multiply(0, z);\n        j = fractDigits;\n        while (j >= 7) {\n          multiply(1e7, 0);\n          j -= 7;\n        }\n        multiply(pow(10, j, 1), 0);\n        j = e - 1;\n        while (j >= 23) {\n          divide(1 << 23);\n          j -= 23;\n        }\n        divide(1 << j);\n        multiply(1, 1);\n        divide(2);\n        result = dataToString();\n      } else {\n        multiply(0, z);\n        multiply(1 << -e, 0);\n        result = dataToString() + repeat.call('0', fractDigits);\n      }\n    }\n    if (fractDigits > 0) {\n      k = result.length;\n      result = sign + (k <= fractDigits\n        ? '0.' + repeat.call('0', fractDigits - k) + result\n        : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));\n    } else {\n      result = sign + result;\n    } return result;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar createProperty = require('../internals/create-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('slice');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('slice', { ACCESSORS: true, 0: 0, 1: 2 });\n\nvar SPECIES = wellKnownSymbol('species');\nvar nativeSlice = [].slice;\nvar max = Math.max;\n\n// `Array.prototype.slice` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.slice\n// fallback for not array-like ES3 strings and DOM objects\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  slice: function slice(start, end) {\n    var O = toIndexedObject(this);\n    var length = toLength(O.length);\n    var k = toAbsoluteIndex(start, length);\n    var fin = toAbsoluteIndex(end === undefined ? length : end, length);\n    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible\n    var Constructor, result, n;\n    if (isArray(O)) {\n      Constructor = O.constructor;\n      // cross-realm fallback\n      if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {\n        Constructor = undefined;\n      } else if (isObject(Constructor)) {\n        Constructor = Constructor[SPECIES];\n        if (Constructor === null) Constructor = undefined;\n      }\n      if (Constructor === Array || Constructor === undefined) {\n        return nativeSlice.call(O, k, fin);\n      }\n    }\n    result = new (Constructor === undefined ? Array : Constructor)(max(fin - k, 0));\n    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);\n    result.length = n;\n    return result;\n  }\n});\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = !fails(function () {\n  var url = new URL('b?a=1&b=2&c=3', 'http://a');\n  var searchParams = url.searchParams;\n  var result = '';\n  url.pathname = 'c%20d';\n  searchParams.forEach(function (value, key) {\n    searchParams['delete']('b');\n    result += key + value;\n  });\n  return (IS_PURE && !url.toJSON)\n    || !searchParams.sort\n    || url.href !== 'http://a/c%20d?a=1&c=3'\n    || searchParams.get('c') !== '3'\n    || String(new URLSearchParams('?a=1')) !== 'a=1'\n    || !searchParams[ITERATOR]\n    // throws in Edge\n    || new URL('https://a@b').username !== 'a'\n    || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'\n    // not punycoded in Edge\n    || new URL('http://тест').host !== 'xn--e1aybc'\n    // not escaped in Chrome 62-\n    || new URL('http://a#б').hash !== '#%D0%B1'\n    // fails in Chrome 66-\n    || result !== 'a1c3'\n    // throws in Safari\n    || new URL('http://x', undefined).host !== 'x';\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $includes = require('../internals/array-includes').includes;\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\n\n// `Array.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.includes\n$({ target: 'Array', proto: true, forced: !USES_TO_LENGTH }, {\n  includes: function includes(el /* , fromIndex = 0 */) {\n    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('includes');\n","'use strict';\nvar $ = require('../internals/export');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\n\n// `String.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.includes\n$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {\n  includes: function includes(searchString /* , position = 0 */) {\n    return !!~String(requireObjectCoercible(this))\n      .indexOf(notARegExp(searchString), arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","// https://github.com/tc39/proposal-string-pad-start-end\nvar toLength = require('../internals/to-length');\nvar repeat = require('../internals/string-repeat');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nvar ceil = Math.ceil;\n\n// `String.prototype.{ padStart, padEnd }` methods implementation\nvar createMethod = function (IS_END) {\n  return function ($this, maxLength, fillString) {\n    var S = String(requireObjectCoercible($this));\n    var stringLength = S.length;\n    var fillStr = fillString === undefined ? ' ' : String(fillString);\n    var intMaxLength = toLength(maxLength);\n    var fillLen, stringFiller;\n    if (intMaxLength <= stringLength || fillStr == '') return S;\n    fillLen = intMaxLength - stringLength;\n    stringFiller = repeat.call(fillStr, ceil(fillLen / fillStr.length));\n    if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);\n    return IS_END ? S + stringFiller : stringFiller + S;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.padStart` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.padstart\n  start: createMethod(false),\n  // `String.prototype.padEnd` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.padend\n  end: createMethod(true)\n};\n","// `Math.sign` method implementation\n// https://tc39.github.io/ecma262/#sec-math.sign\nmodule.exports = Math.sign || function sign(x) {\n  // eslint-disable-next-line no-self-compare\n  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;\n};\n","module.exports = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';\n","/* eslint-disable no-new */\nvar global = require('../internals/global');\nvar fails = require('../internals/fails');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar NATIVE_ARRAY_BUFFER_VIEWS = require('../internals/array-buffer-view-core').NATIVE_ARRAY_BUFFER_VIEWS;\n\nvar ArrayBuffer = global.ArrayBuffer;\nvar Int8Array = global.Int8Array;\n\nmodule.exports = !NATIVE_ARRAY_BUFFER_VIEWS || !fails(function () {\n  Int8Array(1);\n}) || !fails(function () {\n  new Int8Array(-1);\n}) || !checkCorrectnessOfIteration(function (iterable) {\n  new Int8Array();\n  new Int8Array(null);\n  new Int8Array(1.5);\n  new Int8Array(iterable);\n}, true) || fails(function () {\n  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill\n  return new Int8Array(new ArrayBuffer(2), 1, undefined).length !== 1;\n});\n","// `SameValue` abstract operation\n// https://tc39.github.io/ecma262/#sec-samevalue\nmodule.exports = Object.is || function is(x, y) {\n  // eslint-disable-next-line no-self-compare\n  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;\n};\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.array.iterator');\nvar $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar InternalStateModule = require('../internals/internal-state');\nvar anInstance = require('../internals/an-instance');\nvar hasOwn = require('../internals/has');\nvar bind = require('../internals/function-bind-context');\nvar classof = require('../internals/classof');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar getIterator = require('../internals/get-iterator');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar $fetch = getBuiltIn('fetch');\nvar Headers = getBuiltIn('Headers');\nvar ITERATOR = wellKnownSymbol('iterator');\nvar URL_SEARCH_PARAMS = 'URLSearchParams';\nvar URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalParamsState = InternalStateModule.getterFor(URL_SEARCH_PARAMS);\nvar getInternalIteratorState = InternalStateModule.getterFor(URL_SEARCH_PARAMS_ITERATOR);\n\nvar plus = /\\+/g;\nvar sequences = Array(4);\n\nvar percentSequence = function (bytes) {\n  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\\\da-f]{2}){' + bytes + '})', 'gi'));\n};\n\nvar percentDecode = function (sequence) {\n  try {\n    return decodeURIComponent(sequence);\n  } catch (error) {\n    return sequence;\n  }\n};\n\nvar deserialize = function (it) {\n  var result = it.replace(plus, ' ');\n  var bytes = 4;\n  try {\n    return decodeURIComponent(result);\n  } catch (error) {\n    while (bytes) {\n      result = result.replace(percentSequence(bytes--), percentDecode);\n    }\n    return result;\n  }\n};\n\nvar find = /[!'()~]|%20/g;\n\nvar replace = {\n  '!': '%21',\n  \"'\": '%27',\n  '(': '%28',\n  ')': '%29',\n  '~': '%7E',\n  '%20': '+'\n};\n\nvar replacer = function (match) {\n  return replace[match];\n};\n\nvar serialize = function (it) {\n  return encodeURIComponent(it).replace(find, replacer);\n};\n\nvar parseSearchParams = function (result, query) {\n  if (query) {\n    var attributes = query.split('&');\n    var index = 0;\n    var attribute, entry;\n    while (index < attributes.length) {\n      attribute = attributes[index++];\n      if (attribute.length) {\n        entry = attribute.split('=');\n        result.push({\n          key: deserialize(entry.shift()),\n          value: deserialize(entry.join('='))\n        });\n      }\n    }\n  }\n};\n\nvar updateSearchParams = function (query) {\n  this.entries.length = 0;\n  parseSearchParams(this.entries, query);\n};\n\nvar validateArgumentsLength = function (passed, required) {\n  if (passed < required) throw TypeError('Not enough arguments');\n};\n\nvar URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {\n  setInternalState(this, {\n    type: URL_SEARCH_PARAMS_ITERATOR,\n    iterator: getIterator(getInternalParamsState(params).entries),\n    kind: kind\n  });\n}, 'Iterator', function next() {\n  var state = getInternalIteratorState(this);\n  var kind = state.kind;\n  var step = state.iterator.next();\n  var entry = step.value;\n  if (!step.done) {\n    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];\n  } return step;\n});\n\n// `URLSearchParams` constructor\n// https://url.spec.whatwg.org/#interface-urlsearchparams\nvar URLSearchParamsConstructor = function URLSearchParams(/* init */) {\n  anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n  var init = arguments.length > 0 ? arguments[0] : undefined;\n  var that = this;\n  var entries = [];\n  var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;\n\n  setInternalState(that, {\n    type: URL_SEARCH_PARAMS,\n    entries: entries,\n    updateURL: function () { /* empty */ },\n    updateSearchParams: updateSearchParams\n  });\n\n  if (init !== undefined) {\n    if (isObject(init)) {\n      iteratorMethod = getIteratorMethod(init);\n      if (typeof iteratorMethod === 'function') {\n        iterator = iteratorMethod.call(init);\n        next = iterator.next;\n        while (!(step = next.call(iterator)).done) {\n          entryIterator = getIterator(anObject(step.value));\n          entryNext = entryIterator.next;\n          if (\n            (first = entryNext.call(entryIterator)).done ||\n            (second = entryNext.call(entryIterator)).done ||\n            !entryNext.call(entryIterator).done\n          ) throw TypeError('Expected sequence with length 2');\n          entries.push({ key: first.value + '', value: second.value + '' });\n        }\n      } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });\n    } else {\n      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');\n    }\n  }\n};\n\nvar URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;\n\nredefineAll(URLSearchParamsPrototype, {\n  // `URLSearchParams.prototype.appent` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-append\n  append: function append(name, value) {\n    validateArgumentsLength(arguments.length, 2);\n    var state = getInternalParamsState(this);\n    state.entries.push({ key: name + '', value: value + '' });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.delete` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete\n  'delete': function (name) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index].key === key) entries.splice(index, 1);\n      else index++;\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.get` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-get\n  get: function get(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) return entries[index].value;\n    }\n    return null;\n  },\n  // `URLSearchParams.prototype.getAll` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall\n  getAll: function getAll(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var result = [];\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) result.push(entries[index].value);\n    }\n    return result;\n  },\n  // `URLSearchParams.prototype.has` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-has\n  has: function has(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index++].key === key) return true;\n    }\n    return false;\n  },\n  // `URLSearchParams.prototype.set` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-set\n  set: function set(name, value) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var found = false;\n    var key = name + '';\n    var val = value + '';\n    var index = 0;\n    var entry;\n    for (; index < entries.length; index++) {\n      entry = entries[index];\n      if (entry.key === key) {\n        if (found) entries.splice(index--, 1);\n        else {\n          found = true;\n          entry.value = val;\n        }\n      }\n    }\n    if (!found) entries.push({ key: key, value: val });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.sort` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort\n  sort: function sort() {\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    // Array#sort is not stable in some engines\n    var slice = entries.slice();\n    var entry, entriesIndex, sliceIndex;\n    entries.length = 0;\n    for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {\n      entry = slice[sliceIndex];\n      for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {\n        if (entries[entriesIndex].key > entry.key) {\n          entries.splice(entriesIndex, 0, entry);\n          break;\n        }\n      }\n      if (entriesIndex === sliceIndex) entries.push(entry);\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.forEach` method\n  forEach: function forEach(callback /* , thisArg */) {\n    var entries = getInternalParamsState(this).entries;\n    var boundFunction = bind(callback, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var index = 0;\n    var entry;\n    while (index < entries.length) {\n      entry = entries[index++];\n      boundFunction(entry.value, entry.key, this);\n    }\n  },\n  // `URLSearchParams.prototype.keys` method\n  keys: function keys() {\n    return new URLSearchParamsIterator(this, 'keys');\n  },\n  // `URLSearchParams.prototype.values` method\n  values: function values() {\n    return new URLSearchParamsIterator(this, 'values');\n  },\n  // `URLSearchParams.prototype.entries` method\n  entries: function entries() {\n    return new URLSearchParamsIterator(this, 'entries');\n  }\n}, { enumerable: true });\n\n// `URLSearchParams.prototype[@@iterator]` method\nredefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);\n\n// `URLSearchParams.prototype.toString` method\n// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior\nredefine(URLSearchParamsPrototype, 'toString', function toString() {\n  var entries = getInternalParamsState(this).entries;\n  var result = [];\n  var index = 0;\n  var entry;\n  while (index < entries.length) {\n    entry = entries[index++];\n    result.push(serialize(entry.key) + '=' + serialize(entry.value));\n  } return result.join('&');\n}, { enumerable: true });\n\nsetToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n\n$({ global: true, forced: !USE_NATIVE_URL }, {\n  URLSearchParams: URLSearchParamsConstructor\n});\n\n// Wrap `fetch` for correct work with polyfilled `URLSearchParams`\n// https://github.com/zloirock/core-js/issues/674\nif (!USE_NATIVE_URL && typeof $fetch == 'function' && typeof Headers == 'function') {\n  $({ global: true, enumerable: true, forced: true }, {\n    fetch: function fetch(input /* , init */) {\n      var args = [input];\n      var init, body, headers;\n      if (arguments.length > 1) {\n        init = arguments[1];\n        if (isObject(init)) {\n          body = init.body;\n          if (classof(body) === URL_SEARCH_PARAMS) {\n            headers = init.headers ? new Headers(init.headers) : new Headers();\n            if (!headers.has('content-type')) {\n              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');\n            }\n            init = create(init, {\n              body: createPropertyDescriptor(0, String(body)),\n              headers: createPropertyDescriptor(0, headers)\n            });\n          }\n        }\n        args.push(init);\n      } return $fetch.apply(this, args);\n    }\n  });\n}\n\nmodule.exports = {\n  URLSearchParams: URLSearchParamsConstructor,\n  getState: getInternalParamsState\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar $trim = require('../internals/string-trim').trim;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\n// `String.prototype.trim` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.trim\n$({ target: 'String', proto: true, forced: forcedStringTrimMethod('trim') }, {\n  trim: function trim() {\n    return $trim(this);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.link` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.link\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {\n  link: function link(url) {\n    return createHTML(this, 'a', 'href', url);\n  }\n});\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof-raw');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar toPrimitive = require('../internals/to-primitive');\nvar fails = require('../internals/fails');\nvar create = require('../internals/object-create');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar trim = require('../internals/string-trim').trim;\n\nvar NUMBER = 'Number';\nvar NativeNumber = global[NUMBER];\nvar NumberPrototype = NativeNumber.prototype;\n\n// Opera ~12 has broken Object#toString\nvar BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;\n\n// `ToNumber` abstract operation\n// https://tc39.github.io/ecma262/#sec-tonumber\nvar toNumber = function (argument) {\n  var it = toPrimitive(argument, false);\n  var first, third, radix, maxCode, digits, length, index, code;\n  if (typeof it == 'string' && it.length > 2) {\n    it = trim(it);\n    first = it.charCodeAt(0);\n    if (first === 43 || first === 45) {\n      third = it.charCodeAt(2);\n      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix\n    } else if (first === 48) {\n      switch (it.charCodeAt(1)) {\n        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i\n        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i\n        default: return +it;\n      }\n      digits = it.slice(2);\n      length = digits.length;\n      for (index = 0; index < length; index++) {\n        code = digits.charCodeAt(index);\n        // parseInt parses a string to a first unavailable symbol\n        // but ToNumber should return NaN if a string contains unavailable symbols\n        if (code < 48 || code > maxCode) return NaN;\n      } return parseInt(digits, radix);\n    }\n  } return +it;\n};\n\n// `Number` constructor\n// https://tc39.github.io/ecma262/#sec-number-constructor\nif (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {\n  var NumberWrapper = function Number(value) {\n    var it = arguments.length < 1 ? 0 : value;\n    var dummy = this;\n    return dummy instanceof NumberWrapper\n      // check on 1..constructor(foo) case\n      && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classof(dummy) != NUMBER)\n        ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);\n  };\n  for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (\n    // ES3:\n    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +\n    // ES2015 (in case, if modules with ES2015 Number statics required before):\n    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +\n    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'\n  ).split(','), j = 0, key; keys.length > j; j++) {\n    if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {\n      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));\n    }\n  }\n  NumberWrapper.prototype = NumberPrototype;\n  NumberPrototype.constructor = NumberWrapper;\n  redefine(global, NUMBER, NumberWrapper);\n}\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyNames = require('../internals/object-get-own-property-names').f;\n\nvar toString = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n  ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n  try {\n    return nativeGetOwnPropertyNames(it);\n  } catch (error) {\n    return windowNames.slice();\n  }\n};\n\n// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\nmodule.exports.f = function getOwnPropertyNames(it) {\n  return windowNames && toString.call(it) == '[object Window]'\n    ? getWindowNames(it)\n    : nativeGetOwnPropertyNames(toIndexedObject(it));\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nexports.f = wellKnownSymbol;\n","var DESCRIPTORS = require('../internals/descriptors');\nvar objectKeys = require('../internals/object-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar propertyIsEnumerable = require('../internals/object-property-is-enumerable').f;\n\n// `Object.{ entries, values }` methods implementation\nvar createMethod = function (TO_ENTRIES) {\n  return function (it) {\n    var O = toIndexedObject(it);\n    var keys = objectKeys(O);\n    var length = keys.length;\n    var i = 0;\n    var result = [];\n    var key;\n    while (length > i) {\n      key = keys[i++];\n      if (!DESCRIPTORS || propertyIsEnumerable.call(O, key)) {\n        result.push(TO_ENTRIES ? [key, O[key]] : O[key]);\n      }\n    }\n    return result;\n  };\n};\n\nmodule.exports = {\n  // `Object.entries` method\n  // https://tc39.github.io/ecma262/#sec-object.entries\n  entries: createMethod(true),\n  // `Object.values` method\n  // https://tc39.github.io/ecma262/#sec-object.values\n  values: createMethod(false)\n};\n","'use strict';\nvar aFunction = require('../internals/a-function');\nvar isObject = require('../internals/is-object');\n\nvar slice = [].slice;\nvar factories = {};\n\nvar construct = function (C, argsLength, args) {\n  if (!(argsLength in factories)) {\n    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';\n    // eslint-disable-next-line no-new-func\n    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');\n  } return factories[argsLength](C, args);\n};\n\n// `Function.prototype.bind` method implementation\n// https://tc39.github.io/ecma262/#sec-function.prototype.bind\nmodule.exports = Function.bind || function bind(that /* , ...args */) {\n  var fn = aFunction(this);\n  var partArgs = slice.call(arguments, 1);\n  var boundFunction = function bound(/* args... */) {\n    var args = partArgs.concat(slice.call(arguments));\n    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);\n  };\n  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;\n  return boundFunction;\n};\n","'use strict';\nvar toObject = require('../internals/to-object');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\n\nvar min = Math.min;\n\n// `Array.prototype.copyWithin` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin\nmodule.exports = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {\n  var O = toObject(this);\n  var len = toLength(O.length);\n  var to = toAbsoluteIndex(target, len);\n  var from = toAbsoluteIndex(start, len);\n  var end = arguments.length > 2 ? arguments[2] : undefined;\n  var count = min((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);\n  var inc = 1;\n  if (from < to && to < from + count) {\n    inc = -1;\n    from += count - 1;\n    to += count - 1;\n  }\n  while (count-- > 0) {\n    if (from in O) O[to] = O[from];\n    else delete O[to];\n    to += inc;\n    from += inc;\n  } return O;\n};\n","'use strict';\nvar isArray = require('../internals/is-array');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\n\n// `FlattenIntoArray` abstract operation\n// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray\nvar flattenIntoArray = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {\n  var targetIndex = start;\n  var sourceIndex = 0;\n  var mapFn = mapper ? bind(mapper, thisArg, 3) : false;\n  var element;\n\n  while (sourceIndex < sourceLen) {\n    if (sourceIndex in source) {\n      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];\n\n      if (depth > 0 && isArray(element)) {\n        targetIndex = flattenIntoArray(target, original, element, toLength(element.length), targetIndex, depth - 1) - 1;\n      } else {\n        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError('Exceed the acceptable array length');\n        target[targetIndex] = element;\n      }\n\n      targetIndex++;\n    }\n    sourceIndex++;\n  }\n  return targetIndex;\n};\n\nmodule.exports = flattenIntoArray;\n","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar min = Math.min;\nvar nativeLastIndexOf = [].lastIndexOf;\nvar NEGATIVE_ZERO = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;\nvar STRICT_METHOD = arrayMethodIsStrict('lastIndexOf');\n// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\nvar FORCED = NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH;\n\n// `Array.prototype.lastIndexOf` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof\nmodule.exports = FORCED ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {\n  // convert -0 to +0\n  if (NEGATIVE_ZERO) return nativeLastIndexOf.apply(this, arguments) || 0;\n  var O = toIndexedObject(this);\n  var length = toLength(O.length);\n  var index = length - 1;\n  if (arguments.length > 1) index = min(index, toInteger(arguments[1]));\n  if (index < 0) index = length + index;\n  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;\n  return -1;\n} : nativeLastIndexOf;\n","// https://github.com/zloirock/core-js/issues/280\nvar userAgent = require('../internals/engine-user-agent');\n\n// eslint-disable-next-line unicorn/no-unsafe-regex\nmodule.exports = /Version\\/10\\.\\d+(\\.\\d+)?( Mobile\\/\\w+)? Safari\\//.test(userAgent);\n","var global = require('../internals/global');\nvar trim = require('../internals/string-trim').trim;\nvar whitespaces = require('../internals/whitespaces');\n\nvar $parseInt = global.parseInt;\nvar hex = /^[+-]?0[Xx]/;\nvar FORCED = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;\n\n// `parseInt` method\n// https://tc39.github.io/ecma262/#sec-parseint-string-radix\nmodule.exports = FORCED ? function parseInt(string, radix) {\n  var S = trim(String(string));\n  return $parseInt(S, (radix >>> 0) || (hex.test(S) ? 16 : 10));\n} : $parseInt;\n","var global = require('../internals/global');\nvar trim = require('../internals/string-trim').trim;\nvar whitespaces = require('../internals/whitespaces');\n\nvar $parseFloat = global.parseFloat;\nvar FORCED = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;\n\n// `parseFloat` method\n// https://tc39.github.io/ecma262/#sec-parsefloat-string\nmodule.exports = FORCED ? function parseFloat(string) {\n  var trimmedString = trim(String(string));\n  var result = $parseFloat(trimmedString);\n  return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;\n} : $parseFloat;\n","var isObject = require('../internals/is-object');\n\nvar floor = Math.floor;\n\n// `Number.isInteger` method implementation\n// https://tc39.github.io/ecma262/#sec-number.isinteger\nmodule.exports = function isInteger(it) {\n  return !isObject(it) && isFinite(it) && floor(it) === it;\n};\n","var log = Math.log;\n\n// `Math.log1p` method implementation\n// https://tc39.github.io/ecma262/#sec-math.log1p\nmodule.exports = Math.log1p || function log1p(x) {\n  return (x = +x) > -1e-8 && x < 1e-8 ? x - x * x / 2 : log(1 + x);\n};\n","'use strict';\nvar defineProperty = require('../internals/object-define-property').f;\nvar create = require('../internals/object-create');\nvar redefineAll = require('../internals/redefine-all');\nvar bind = require('../internals/function-bind-context');\nvar anInstance = require('../internals/an-instance');\nvar iterate = require('../internals/iterate');\nvar defineIterator = require('../internals/define-iterator');\nvar setSpecies = require('../internals/set-species');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fastKey = require('../internals/internal-metadata').fastKey;\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar internalStateGetterFor = InternalStateModule.getterFor;\n\nmodule.exports = {\n  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      anInstance(that, C, CONSTRUCTOR_NAME);\n      setInternalState(that, {\n        type: CONSTRUCTOR_NAME,\n        index: create(null),\n        first: undefined,\n        last: undefined,\n        size: 0\n      });\n      if (!DESCRIPTORS) that.size = 0;\n      if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n    });\n\n    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);\n\n    var define = function (that, key, value) {\n      var state = getInternalState(that);\n      var entry = getEntry(that, key);\n      var previous, index;\n      // change existing entry\n      if (entry) {\n        entry.value = value;\n      // create new entry\n      } else {\n        state.last = entry = {\n          index: index = fastKey(key, true),\n          key: key,\n          value: value,\n          previous: previous = state.last,\n          next: undefined,\n          removed: false\n        };\n        if (!state.first) state.first = entry;\n        if (previous) previous.next = entry;\n        if (DESCRIPTORS) state.size++;\n        else that.size++;\n        // add to index\n        if (index !== 'F') state.index[index] = entry;\n      } return that;\n    };\n\n    var getEntry = function (that, key) {\n      var state = getInternalState(that);\n      // fast case\n      var index = fastKey(key);\n      var entry;\n      if (index !== 'F') return state.index[index];\n      // frozen object case\n      for (entry = state.first; entry; entry = entry.next) {\n        if (entry.key == key) return entry;\n      }\n    };\n\n    redefineAll(C.prototype, {\n      // 23.1.3.1 Map.prototype.clear()\n      // 23.2.3.2 Set.prototype.clear()\n      clear: function clear() {\n        var that = this;\n        var state = getInternalState(that);\n        var data = state.index;\n        var entry = state.first;\n        while (entry) {\n          entry.removed = true;\n          if (entry.previous) entry.previous = entry.previous.next = undefined;\n          delete data[entry.index];\n          entry = entry.next;\n        }\n        state.first = state.last = undefined;\n        if (DESCRIPTORS) state.size = 0;\n        else that.size = 0;\n      },\n      // 23.1.3.3 Map.prototype.delete(key)\n      // 23.2.3.4 Set.prototype.delete(value)\n      'delete': function (key) {\n        var that = this;\n        var state = getInternalState(that);\n        var entry = getEntry(that, key);\n        if (entry) {\n          var next = entry.next;\n          var prev = entry.previous;\n          delete state.index[entry.index];\n          entry.removed = true;\n          if (prev) prev.next = next;\n          if (next) next.previous = prev;\n          if (state.first == entry) state.first = next;\n          if (state.last == entry) state.last = prev;\n          if (DESCRIPTORS) state.size--;\n          else that.size--;\n        } return !!entry;\n      },\n      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)\n      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)\n      forEach: function forEach(callbackfn /* , that = undefined */) {\n        var state = getInternalState(this);\n        var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n        var entry;\n        while (entry = entry ? entry.next : state.first) {\n          boundFunction(entry.value, entry.key, this);\n          // revert to the last existing entry\n          while (entry && entry.removed) entry = entry.previous;\n        }\n      },\n      // 23.1.3.7 Map.prototype.has(key)\n      // 23.2.3.7 Set.prototype.has(value)\n      has: function has(key) {\n        return !!getEntry(this, key);\n      }\n    });\n\n    redefineAll(C.prototype, IS_MAP ? {\n      // 23.1.3.6 Map.prototype.get(key)\n      get: function get(key) {\n        var entry = getEntry(this, key);\n        return entry && entry.value;\n      },\n      // 23.1.3.9 Map.prototype.set(key, value)\n      set: function set(key, value) {\n        return define(this, key === 0 ? 0 : key, value);\n      }\n    } : {\n      // 23.2.3.1 Set.prototype.add(value)\n      add: function add(value) {\n        return define(this, value = value === 0 ? 0 : value, value);\n      }\n    });\n    if (DESCRIPTORS) defineProperty(C.prototype, 'size', {\n      get: function () {\n        return getInternalState(this).size;\n      }\n    });\n    return C;\n  },\n  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {\n    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';\n    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);\n    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);\n    // add .keys, .values, .entries, [@@iterator]\n    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11\n    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {\n      setInternalState(this, {\n        type: ITERATOR_NAME,\n        target: iterated,\n        state: getInternalCollectionState(iterated),\n        kind: kind,\n        last: undefined\n      });\n    }, function () {\n      var state = getInternalIteratorState(this);\n      var kind = state.kind;\n      var entry = state.last;\n      // revert to the last existing entry\n      while (entry && entry.removed) entry = entry.previous;\n      // get next entry\n      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {\n        // or finish the iteration\n        state.target = undefined;\n        return { value: undefined, done: true };\n      }\n      // return step by kind\n      if (kind == 'keys') return { value: entry.key, done: false };\n      if (kind == 'values') return { value: entry.value, done: false };\n      return { value: [entry.key, entry.value], done: false };\n    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);\n\n    // add [@@species], 23.1.2.2, 23.2.2.2\n    setSpecies(CONSTRUCTOR_NAME);\n  }\n};\n","'use strict';\nvar redefineAll = require('../internals/redefine-all');\nvar getWeakData = require('../internals/internal-metadata').getWeakData;\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar anInstance = require('../internals/an-instance');\nvar iterate = require('../internals/iterate');\nvar ArrayIterationModule = require('../internals/array-iteration');\nvar $has = require('../internals/has');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar internalStateGetterFor = InternalStateModule.getterFor;\nvar find = ArrayIterationModule.find;\nvar findIndex = ArrayIterationModule.findIndex;\nvar id = 0;\n\n// fallback for uncaught frozen keys\nvar uncaughtFrozenStore = function (store) {\n  return store.frozen || (store.frozen = new UncaughtFrozenStore());\n};\n\nvar UncaughtFrozenStore = function () {\n  this.entries = [];\n};\n\nvar findUncaughtFrozen = function (store, key) {\n  return find(store.entries, function (it) {\n    return it[0] === key;\n  });\n};\n\nUncaughtFrozenStore.prototype = {\n  get: function (key) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) return entry[1];\n  },\n  has: function (key) {\n    return !!findUncaughtFrozen(this, key);\n  },\n  set: function (key, value) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) entry[1] = value;\n    else this.entries.push([key, value]);\n  },\n  'delete': function (key) {\n    var index = findIndex(this.entries, function (it) {\n      return it[0] === key;\n    });\n    if (~index) this.entries.splice(index, 1);\n    return !!~index;\n  }\n};\n\nmodule.exports = {\n  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      anInstance(that, C, CONSTRUCTOR_NAME);\n      setInternalState(that, {\n        type: CONSTRUCTOR_NAME,\n        id: id++,\n        frozen: undefined\n      });\n      if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n    });\n\n    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);\n\n    var define = function (that, key, value) {\n      var state = getInternalState(that);\n      var data = getWeakData(anObject(key), true);\n      if (data === true) uncaughtFrozenStore(state).set(key, value);\n      else data[state.id] = value;\n      return that;\n    };\n\n    redefineAll(C.prototype, {\n      // 23.3.3.2 WeakMap.prototype.delete(key)\n      // 23.4.3.3 WeakSet.prototype.delete(value)\n      'delete': function (key) {\n        var state = getInternalState(this);\n        if (!isObject(key)) return false;\n        var data = getWeakData(key);\n        if (data === true) return uncaughtFrozenStore(state)['delete'](key);\n        return data && $has(data, state.id) && delete data[state.id];\n      },\n      // 23.3.3.4 WeakMap.prototype.has(key)\n      // 23.4.3.4 WeakSet.prototype.has(value)\n      has: function has(key) {\n        var state = getInternalState(this);\n        if (!isObject(key)) return false;\n        var data = getWeakData(key);\n        if (data === true) return uncaughtFrozenStore(state).has(key);\n        return data && $has(data, state.id);\n      }\n    });\n\n    redefineAll(C.prototype, IS_MAP ? {\n      // 23.3.3.3 WeakMap.prototype.get(key)\n      get: function get(key) {\n        var state = getInternalState(this);\n        if (isObject(key)) {\n          var data = getWeakData(key);\n          if (data === true) return uncaughtFrozenStore(state).get(key);\n          return data ? data[state.id] : undefined;\n        }\n      },\n      // 23.3.3.5 WeakMap.prototype.set(key, value)\n      set: function set(key, value) {\n        return define(this, key, value);\n      }\n    } : {\n      // 23.4.3.1 WeakSet.prototype.add(value)\n      add: function add(value) {\n        return define(this, value, true);\n      }\n    });\n\n    return C;\n  }\n};\n","var toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\n\n// `ToIndex` abstract operation\n// https://tc39.github.io/ecma262/#sec-toindex\nmodule.exports = function (it) {\n  if (it === undefined) return 0;\n  var number = toInteger(it);\n  var length = toLength(number);\n  if (number !== length) throw RangeError('Wrong length or index');\n  return length;\n};\n","var toPositiveInteger = require('../internals/to-positive-integer');\n\nmodule.exports = function (it, BYTES) {\n  var offset = toPositiveInteger(it);\n  if (offset % BYTES) throw RangeError('Wrong offset');\n  return offset;\n};\n","var toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar bind = require('../internals/function-bind-context');\nvar aTypedArrayConstructor = require('../internals/array-buffer-view-core').aTypedArrayConstructor;\n\nmodule.exports = function from(source /* , mapfn, thisArg */) {\n  var O = toObject(source);\n  var argumentsLength = arguments.length;\n  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n  var mapping = mapfn !== undefined;\n  var iteratorMethod = getIteratorMethod(O);\n  var i, length, result, step, iterator, next;\n  if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {\n    iterator = iteratorMethod.call(O);\n    next = iterator.next;\n    O = [];\n    while (!(step = next.call(iterator)).done) {\n      O.push(step.value);\n    }\n  }\n  if (mapping && argumentsLength > 2) {\n    mapfn = bind(mapfn, arguments[2], 2);\n  }\n  length = toLength(O.length);\n  result = new (aTypedArrayConstructor(this))(length);\n  for (i = 0; length > i; i++) {\n    result[i] = mapping ? mapfn(O[i], i) : O[i];\n  }\n  return result;\n};\n","'use strict';\n// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js\nvar maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1\nvar base = 36;\nvar tMin = 1;\nvar tMax = 26;\nvar skew = 38;\nvar damp = 700;\nvar initialBias = 72;\nvar initialN = 128; // 0x80\nvar delimiter = '-'; // '\\x2D'\nvar regexNonASCII = /[^\\0-\\u007E]/; // non-ASCII chars\nvar regexSeparators = /[.\\u3002\\uFF0E\\uFF61]/g; // RFC 3490 separators\nvar OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';\nvar baseMinusTMin = base - tMin;\nvar floor = Math.floor;\nvar stringFromCharCode = String.fromCharCode;\n\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n */\nvar ucs2decode = function (string) {\n  var output = [];\n  var counter = 0;\n  var length = string.length;\n  while (counter < length) {\n    var value = string.charCodeAt(counter++);\n    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n      // It's a high surrogate, and there is a next character.\n      var extra = string.charCodeAt(counter++);\n      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.\n        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n      } else {\n        // It's an unmatched surrogate; only append this code unit, in case the\n        // next code unit is the high surrogate of a surrogate pair.\n        output.push(value);\n        counter--;\n      }\n    } else {\n      output.push(value);\n    }\n  }\n  return output;\n};\n\n/**\n * Converts a digit/integer into a basic code point.\n */\nvar digitToBasic = function (digit) {\n  //  0..25 map to ASCII a..z or A..Z\n  // 26..35 map to ASCII 0..9\n  return digit + 22 + 75 * (digit < 26);\n};\n\n/**\n * Bias adaptation function as per section 3.4 of RFC 3492.\n * https://tools.ietf.org/html/rfc3492#section-3.4\n */\nvar adapt = function (delta, numPoints, firstTime) {\n  var k = 0;\n  delta = firstTime ? floor(delta / damp) : delta >> 1;\n  delta += floor(delta / numPoints);\n  for (; delta > baseMinusTMin * tMax >> 1; k += base) {\n    delta = floor(delta / baseMinusTMin);\n  }\n  return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n};\n\n/**\n * Converts a string of Unicode symbols (e.g. a domain name label) to a\n * Punycode string of ASCII-only symbols.\n */\n// eslint-disable-next-line  max-statements\nvar encode = function (input) {\n  var output = [];\n\n  // Convert the input in UCS-2 to an array of Unicode code points.\n  input = ucs2decode(input);\n\n  // Cache the length.\n  var inputLength = input.length;\n\n  // Initialize the state.\n  var n = initialN;\n  var delta = 0;\n  var bias = initialBias;\n  var i, currentValue;\n\n  // Handle the basic code points.\n  for (i = 0; i < input.length; i++) {\n    currentValue = input[i];\n    if (currentValue < 0x80) {\n      output.push(stringFromCharCode(currentValue));\n    }\n  }\n\n  var basicLength = output.length; // number of basic code points.\n  var handledCPCount = basicLength; // number of code points that have been handled;\n\n  // Finish the basic string with a delimiter unless it's empty.\n  if (basicLength) {\n    output.push(delimiter);\n  }\n\n  // Main encoding loop:\n  while (handledCPCount < inputLength) {\n    // All non-basic code points < n have been handled already. Find the next larger one:\n    var m = maxInt;\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue >= n && currentValue < m) {\n        m = currentValue;\n      }\n    }\n\n    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.\n    var handledCPCountPlusOne = handledCPCount + 1;\n    if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n      throw RangeError(OVERFLOW_ERROR);\n    }\n\n    delta += (m - n) * handledCPCountPlusOne;\n    n = m;\n\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue < n && ++delta > maxInt) {\n        throw RangeError(OVERFLOW_ERROR);\n      }\n      if (currentValue == n) {\n        // Represent delta as a generalized variable-length integer.\n        var q = delta;\n        for (var k = base; /* no condition */; k += base) {\n          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n          if (q < t) break;\n          var qMinusT = q - t;\n          var baseMinusT = base - t;\n          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));\n          q = floor(qMinusT / baseMinusT);\n        }\n\n        output.push(stringFromCharCode(digitToBasic(q)));\n        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n        delta = 0;\n        ++handledCPCount;\n      }\n    }\n\n    ++delta;\n    ++n;\n  }\n  return output.join('');\n};\n\nmodule.exports = function (input) {\n  var encoded = [];\n  var labels = input.toLowerCase().replace(regexSeparators, '\\u002E').split('.');\n  var i, label;\n  for (i = 0; i < labels.length; i++) {\n    label = labels[i];\n    encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);\n  }\n  return encoded.join('.');\n};\n","var anObject = require('../internals/an-object');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\nmodule.exports = function (it) {\n  var iteratorMethod = getIteratorMethod(it);\n  if (typeof iteratorMethod != 'function') {\n    throw TypeError(String(it) + ' is not iterable');\n  } return anObject(iteratorMethod.call(it));\n};\n","'use strict';\nvar $ = require('../internals/export');\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\n$({ target: 'URL', proto: true, enumerable: true }, {\n  toJSON: function toJSON() {\n    return URL.prototype.toString.call(this);\n  }\n});\n","var $ = require('../internals/export');\nvar $entries = require('../internals/object-to-array').entries;\n\n// `Object.entries` method\n// https://tc39.github.io/ecma262/#sec-object.entries\n$({ target: 'Object', stat: true }, {\n  entries: function entries(O) {\n    return $entries(O);\n  }\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toLength = require('../internals/to-length');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@match logic\nfixRegExpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {\n  return [\n    // `String.prototype.match` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.match\n    function match(regexp) {\n      var O = requireObjectCoercible(this);\n      var matcher = regexp == undefined ? undefined : regexp[MATCH];\n      return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));\n    },\n    // `RegExp.prototype[@@match]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match\n    function (regexp) {\n      var res = maybeCallNative(nativeMatch, regexp, this);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      if (!rx.global) return regExpExec(rx, S);\n\n      var fullUnicode = rx.unicode;\n      rx.lastIndex = 0;\n      var A = [];\n      var n = 0;\n      var result;\n      while ((result = regExpExec(rx, S)) !== null) {\n        var matchStr = String(result[0]);\n        A[n] = matchStr;\n        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n        n++;\n      }\n      return n === 0 ? null : A;\n    }\n  ];\n});\n","var $ = require('../internals/export');\nvar toObject = require('../internals/to-object');\nvar nativeKeys = require('../internals/object-keys');\nvar fails = require('../internals/fails');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeKeys(1); });\n\n// `Object.keys` method\n// https://tc39.github.io/ecma262/#sec-object.keys\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  keys: function keys(it) {\n    return nativeKeys(toObject(it));\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar IS_PURE = require('../internals/is-pure');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\nvar fails = require('../internals/fails');\nvar has = require('../internals/has');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar nativeObjectCreate = require('../internals/object-create');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertyNamesExternal = require('../internals/object-get-own-property-names-external');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar shared = require('../internals/shared');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar uid = require('../internals/uid');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineWellKnownSymbol = require('../internals/define-well-known-symbol');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar HIDDEN = sharedKey('hidden');\nvar SYMBOL = 'Symbol';\nvar PROTOTYPE = 'prototype';\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(SYMBOL);\nvar ObjectPrototype = Object[PROTOTYPE];\nvar $Symbol = global.Symbol;\nvar $stringify = getBuiltIn('JSON', 'stringify');\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;\nvar nativePropertyIsEnumerable = propertyIsEnumerableModule.f;\nvar AllSymbols = shared('symbols');\nvar ObjectPrototypeSymbols = shared('op-symbols');\nvar StringToSymbolRegistry = shared('string-to-symbol-registry');\nvar SymbolToStringRegistry = shared('symbol-to-string-registry');\nvar WellKnownSymbolsStore = shared('wks');\nvar QObject = global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDescriptor = DESCRIPTORS && fails(function () {\n  return nativeObjectCreate(nativeDefineProperty({}, 'a', {\n    get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }\n  })).a != 7;\n}) ? function (O, P, Attributes) {\n  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor(ObjectPrototype, P);\n  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];\n  nativeDefineProperty(O, P, Attributes);\n  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {\n    nativeDefineProperty(ObjectPrototype, P, ObjectPrototypeDescriptor);\n  }\n} : nativeDefineProperty;\n\nvar wrap = function (tag, description) {\n  var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE]);\n  setInternalState(symbol, {\n    type: SYMBOL,\n    tag: tag,\n    description: description\n  });\n  if (!DESCRIPTORS) symbol.description = description;\n  return symbol;\n};\n\nvar isSymbol = USE_SYMBOL_AS_UID ? function (it) {\n  return typeof it == 'symbol';\n} : function (it) {\n  return Object(it) instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(O, P, Attributes) {\n  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);\n  anObject(O);\n  var key = toPrimitive(P, true);\n  anObject(Attributes);\n  if (has(AllSymbols, key)) {\n    if (!Attributes.enumerable) {\n      if (!has(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));\n      O[HIDDEN][key] = true;\n    } else {\n      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;\n      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });\n    } return setSymbolDescriptor(O, key, Attributes);\n  } return nativeDefineProperty(O, key, Attributes);\n};\n\nvar $defineProperties = function defineProperties(O, Properties) {\n  anObject(O);\n  var properties = toIndexedObject(Properties);\n  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));\n  $forEach(keys, function (key) {\n    if (!DESCRIPTORS || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);\n  });\n  return O;\n};\n\nvar $create = function create(O, Properties) {\n  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);\n};\n\nvar $propertyIsEnumerable = function propertyIsEnumerable(V) {\n  var P = toPrimitive(V, true);\n  var enumerable = nativePropertyIsEnumerable.call(this, P);\n  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;\n  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;\n};\n\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {\n  var it = toIndexedObject(O);\n  var key = toPrimitive(P, true);\n  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;\n  var descriptor = nativeGetOwnPropertyDescriptor(it, key);\n  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {\n    descriptor.enumerable = true;\n  }\n  return descriptor;\n};\n\nvar $getOwnPropertyNames = function getOwnPropertyNames(O) {\n  var names = nativeGetOwnPropertyNames(toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);\n  });\n  return result;\n};\n\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(O) {\n  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;\n  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {\n      result.push(AllSymbols[key]);\n    }\n  });\n  return result;\n};\n\n// `Symbol` constructor\n// https://tc39.github.io/ecma262/#sec-symbol-constructor\nif (!NATIVE_SYMBOL) {\n  $Symbol = function Symbol() {\n    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');\n    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var tag = uid(description);\n    var setter = function (value) {\n      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);\n      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));\n    };\n    if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });\n    return wrap(tag, description);\n  };\n\n  redefine($Symbol[PROTOTYPE], 'toString', function toString() {\n    return getInternalState(this).tag;\n  });\n\n  redefine($Symbol, 'withoutSetter', function (description) {\n    return wrap(uid(description), description);\n  });\n\n  propertyIsEnumerableModule.f = $propertyIsEnumerable;\n  definePropertyModule.f = $defineProperty;\n  getOwnPropertyDescriptorModule.f = $getOwnPropertyDescriptor;\n  getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;\n  getOwnPropertySymbolsModule.f = $getOwnPropertySymbols;\n\n  wrappedWellKnownSymbolModule.f = function (name) {\n    return wrap(wellKnownSymbol(name), name);\n  };\n\n  if (DESCRIPTORS) {\n    // https://github.com/tc39/proposal-Symbol-description\n    nativeDefineProperty($Symbol[PROTOTYPE], 'description', {\n      configurable: true,\n      get: function description() {\n        return getInternalState(this).description;\n      }\n    });\n    if (!IS_PURE) {\n      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });\n    }\n  }\n}\n\n$({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {\n  Symbol: $Symbol\n});\n\n$forEach(objectKeys(WellKnownSymbolsStore), function (name) {\n  defineWellKnownSymbol(name);\n});\n\n$({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Symbol.for` method\n  // https://tc39.github.io/ecma262/#sec-symbol.for\n  'for': function (key) {\n    var string = String(key);\n    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];\n    var symbol = $Symbol(string);\n    StringToSymbolRegistry[string] = symbol;\n    SymbolToStringRegistry[symbol] = string;\n    return symbol;\n  },\n  // `Symbol.keyFor` method\n  // https://tc39.github.io/ecma262/#sec-symbol.keyfor\n  keyFor: function keyFor(sym) {\n    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');\n    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];\n  },\n  useSetter: function () { USE_SETTER = true; },\n  useSimple: function () { USE_SETTER = false; }\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS }, {\n  // `Object.create` method\n  // https://tc39.github.io/ecma262/#sec-object.create\n  create: $create,\n  // `Object.defineProperty` method\n  // https://tc39.github.io/ecma262/#sec-object.defineproperty\n  defineProperty: $defineProperty,\n  // `Object.defineProperties` method\n  // https://tc39.github.io/ecma262/#sec-object.defineproperties\n  defineProperties: $defineProperties,\n  // `Object.getOwnPropertyDescriptor` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors\n  getOwnPropertyDescriptor: $getOwnPropertyDescriptor\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Object.getOwnPropertyNames` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertynames\n  getOwnPropertyNames: $getOwnPropertyNames,\n  // `Object.getOwnPropertySymbols` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols\n  getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\n$({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, {\n  getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n    return getOwnPropertySymbolsModule.f(toObject(it));\n  }\n});\n\n// `JSON.stringify` method behavior with symbols\n// https://tc39.github.io/ecma262/#sec-json.stringify\nif ($stringify) {\n  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails(function () {\n    var symbol = $Symbol();\n    // MS Edge converts symbol values to JSON as {}\n    return $stringify([symbol]) != '[null]'\n      // WebKit converts symbol values to JSON as null\n      || $stringify({ a: symbol }) != '{}'\n      // V8 throws on boxed symbols\n      || $stringify(Object(symbol)) != '{}';\n  });\n\n  $({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {\n    // eslint-disable-next-line no-unused-vars\n    stringify: function stringify(it, replacer, space) {\n      var args = [it];\n      var index = 1;\n      var $replacer;\n      while (arguments.length > index) args.push(arguments[index++]);\n      $replacer = replacer;\n      if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n      if (!isArray(replacer)) replacer = function (key, value) {\n        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n        if (!isSymbol(value)) return value;\n      };\n      args[1] = replacer;\n      return $stringify.apply(null, args);\n    }\n  });\n}\n\n// `Symbol.prototype[@@toPrimitive]` method\n// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive\nif (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {\n  createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);\n}\n// `Symbol.prototype[@@toStringTag]` property\n// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag\nsetToStringTag($Symbol, SYMBOL);\n\nhiddenKeys[HIDDEN] = true;\n","// `Symbol.prototype.description` getter\n// https://tc39.github.io/ecma262/#sec-symbol.prototype.description\n'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar has = require('../internals/has');\nvar isObject = require('../internals/is-object');\nvar defineProperty = require('../internals/object-define-property').f;\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\n\nvar NativeSymbol = global.Symbol;\n\nif (DESCRIPTORS && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||\n  // Safari 12 bug\n  NativeSymbol().description !== undefined\n)) {\n  var EmptyStringDescriptionStore = {};\n  // wrap Symbol constructor for correct work with undefined description\n  var SymbolWrapper = function Symbol() {\n    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var result = this instanceof SymbolWrapper\n      ? new NativeSymbol(description)\n      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'\n      : description === undefined ? NativeSymbol() : NativeSymbol(description);\n    if (description === '') EmptyStringDescriptionStore[result] = true;\n    return result;\n  };\n  copyConstructorProperties(SymbolWrapper, NativeSymbol);\n  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;\n  symbolPrototype.constructor = SymbolWrapper;\n\n  var symbolToString = symbolPrototype.toString;\n  var native = String(NativeSymbol('test')) == 'Symbol(test)';\n  var regexp = /^Symbol\\((.*)\\)[^)]+$/;\n  defineProperty(symbolPrototype, 'description', {\n    configurable: true,\n    get: function description() {\n      var symbol = isObject(this) ? this.valueOf() : this;\n      var string = symbolToString.call(symbol);\n      if (has(EmptyStringDescriptionStore, symbol)) return '';\n      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');\n      return desc === '' ? undefined : desc;\n    }\n  });\n\n  $({ global: true, forced: true }, {\n    Symbol: SymbolWrapper\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar aFunction = require('../internals/a-function');\nvar toObject = require('../internals/to-object');\nvar fails = require('../internals/fails');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar test = [];\nvar nativeSort = test.sort;\n\n// IE8-\nvar FAILS_ON_UNDEFINED = fails(function () {\n  test.sort(undefined);\n});\n// V8 bug\nvar FAILS_ON_NULL = fails(function () {\n  test.sort(null);\n});\n// Old WebKit\nvar STRICT_METHOD = arrayMethodIsStrict('sort');\n\nvar FORCED = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD;\n\n// `Array.prototype.sort` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.sort\n$({ target: 'Array', proto: true, forced: FORCED }, {\n  sort: function sort(comparefn) {\n    return comparefn === undefined\n      ? nativeSort.call(toObject(this))\n      : nativeSort.call(toObject(this), aFunction(comparefn));\n  }\n});\n","require('../es');\nrequire('../web');\nvar path = require('../internals/path');\n\nmodule.exports = path;\n","require('../modules/es.symbol');\nrequire('../modules/es.symbol.async-iterator');\nrequire('../modules/es.symbol.description');\nrequire('../modules/es.symbol.has-instance');\nrequire('../modules/es.symbol.is-concat-spreadable');\nrequire('../modules/es.symbol.iterator');\nrequire('../modules/es.symbol.match');\nrequire('../modules/es.symbol.match-all');\nrequire('../modules/es.symbol.replace');\nrequire('../modules/es.symbol.search');\nrequire('../modules/es.symbol.species');\nrequire('../modules/es.symbol.split');\nrequire('../modules/es.symbol.to-primitive');\nrequire('../modules/es.symbol.to-string-tag');\nrequire('../modules/es.symbol.unscopables');\nrequire('../modules/es.object.assign');\nrequire('../modules/es.object.create');\nrequire('../modules/es.object.define-property');\nrequire('../modules/es.object.define-properties');\nrequire('../modules/es.object.entries');\nrequire('../modules/es.object.freeze');\nrequire('../modules/es.object.from-entries');\nrequire('../modules/es.object.get-own-property-descriptor');\nrequire('../modules/es.object.get-own-property-descriptors');\nrequire('../modules/es.object.get-own-property-names');\nrequire('../modules/es.object.get-prototype-of');\nrequire('../modules/es.object.is');\nrequire('../modules/es.object.is-extensible');\nrequire('../modules/es.object.is-frozen');\nrequire('../modules/es.object.is-sealed');\nrequire('../modules/es.object.keys');\nrequire('../modules/es.object.prevent-extensions');\nrequire('../modules/es.object.seal');\nrequire('../modules/es.object.set-prototype-of');\nrequire('../modules/es.object.values');\nrequire('../modules/es.object.to-string');\nrequire('../modules/es.object.define-getter');\nrequire('../modules/es.object.define-setter');\nrequire('../modules/es.object.lookup-getter');\nrequire('../modules/es.object.lookup-setter');\nrequire('../modules/es.function.bind');\nrequire('../modules/es.function.name');\nrequire('../modules/es.function.has-instance');\nrequire('../modules/es.global-this');\nrequire('../modules/es.array.from');\nrequire('../modules/es.array.is-array');\nrequire('../modules/es.array.of');\nrequire('../modules/es.array.concat');\nrequire('../modules/es.array.copy-within');\nrequire('../modules/es.array.every');\nrequire('../modules/es.array.fill');\nrequire('../modules/es.array.filter');\nrequire('../modules/es.array.find');\nrequire('../modules/es.array.find-index');\nrequire('../modules/es.array.flat');\nrequire('../modules/es.array.flat-map');\nrequire('../modules/es.array.for-each');\nrequire('../modules/es.array.includes');\nrequire('../modules/es.array.index-of');\nrequire('../modules/es.array.join');\nrequire('../modules/es.array.last-index-of');\nrequire('../modules/es.array.map');\nrequire('../modules/es.array.reduce');\nrequire('../modules/es.array.reduce-right');\nrequire('../modules/es.array.reverse');\nrequire('../modules/es.array.slice');\nrequire('../modules/es.array.some');\nrequire('../modules/es.array.sort');\nrequire('../modules/es.array.splice');\nrequire('../modules/es.array.species');\nrequire('../modules/es.array.unscopables.flat');\nrequire('../modules/es.array.unscopables.flat-map');\nrequire('../modules/es.array.iterator');\nrequire('../modules/es.string.from-code-point');\nrequire('../modules/es.string.raw');\nrequire('../modules/es.string.code-point-at');\nrequire('../modules/es.string.ends-with');\nrequire('../modules/es.string.includes');\nrequire('../modules/es.string.match');\nrequire('../modules/es.string.match-all');\nrequire('../modules/es.string.pad-end');\nrequire('../modules/es.string.pad-start');\nrequire('../modules/es.string.repeat');\nrequire('../modules/es.string.replace');\nrequire('../modules/es.string.search');\nrequire('../modules/es.string.split');\nrequire('../modules/es.string.starts-with');\nrequire('../modules/es.string.trim');\nrequire('../modules/es.string.trim-start');\nrequire('../modules/es.string.trim-end');\nrequire('../modules/es.string.iterator');\nrequire('../modules/es.string.anchor');\nrequire('../modules/es.string.big');\nrequire('../modules/es.string.blink');\nrequire('../modules/es.string.bold');\nrequire('../modules/es.string.fixed');\nrequire('../modules/es.string.fontcolor');\nrequire('../modules/es.string.fontsize');\nrequire('../modules/es.string.italics');\nrequire('../modules/es.string.link');\nrequire('../modules/es.string.small');\nrequire('../modules/es.string.strike');\nrequire('../modules/es.string.sub');\nrequire('../modules/es.string.sup');\nrequire('../modules/es.regexp.constructor');\nrequire('../modules/es.regexp.exec');\nrequire('../modules/es.regexp.flags');\nrequire('../modules/es.regexp.sticky');\nrequire('../modules/es.regexp.test');\nrequire('../modules/es.regexp.to-string');\nrequire('../modules/es.parse-int');\nrequire('../modules/es.parse-float');\nrequire('../modules/es.number.constructor');\nrequire('../modules/es.number.epsilon');\nrequire('../modules/es.number.is-finite');\nrequire('../modules/es.number.is-integer');\nrequire('../modules/es.number.is-nan');\nrequire('../modules/es.number.is-safe-integer');\nrequire('../modules/es.number.max-safe-integer');\nrequire('../modules/es.number.min-safe-integer');\nrequire('../modules/es.number.parse-float');\nrequire('../modules/es.number.parse-int');\nrequire('../modules/es.number.to-fixed');\nrequire('../modules/es.number.to-precision');\nrequire('../modules/es.math.acosh');\nrequire('../modules/es.math.asinh');\nrequire('../modules/es.math.atanh');\nrequire('../modules/es.math.cbrt');\nrequire('../modules/es.math.clz32');\nrequire('../modules/es.math.cosh');\nrequire('../modules/es.math.expm1');\nrequire('../modules/es.math.fround');\nrequire('../modules/es.math.hypot');\nrequire('../modules/es.math.imul');\nrequire('../modules/es.math.log10');\nrequire('../modules/es.math.log1p');\nrequire('../modules/es.math.log2');\nrequire('../modules/es.math.sign');\nrequire('../modules/es.math.sinh');\nrequire('../modules/es.math.tanh');\nrequire('../modules/es.math.to-string-tag');\nrequire('../modules/es.math.trunc');\nrequire('../modules/es.date.now');\nrequire('../modules/es.date.to-json');\nrequire('../modules/es.date.to-iso-string');\nrequire('../modules/es.date.to-string');\nrequire('../modules/es.date.to-primitive');\nrequire('../modules/es.json.stringify');\nrequire('../modules/es.json.to-string-tag');\nrequire('../modules/es.promise');\nrequire('../modules/es.promise.all-settled');\nrequire('../modules/es.promise.finally');\nrequire('../modules/es.map');\nrequire('../modules/es.set');\nrequire('../modules/es.weak-map');\nrequire('../modules/es.weak-set');\nrequire('../modules/es.array-buffer.constructor');\nrequire('../modules/es.array-buffer.is-view');\nrequire('../modules/es.array-buffer.slice');\nrequire('../modules/es.data-view');\nrequire('../modules/es.typed-array.int8-array');\nrequire('../modules/es.typed-array.uint8-array');\nrequire('../modules/es.typed-array.uint8-clamped-array');\nrequire('../modules/es.typed-array.int16-array');\nrequire('../modules/es.typed-array.uint16-array');\nrequire('../modules/es.typed-array.int32-array');\nrequire('../modules/es.typed-array.uint32-array');\nrequire('../modules/es.typed-array.float32-array');\nrequire('../modules/es.typed-array.float64-array');\nrequire('../modules/es.typed-array.from');\nrequire('../modules/es.typed-array.of');\nrequire('../modules/es.typed-array.copy-within');\nrequire('../modules/es.typed-array.every');\nrequire('../modules/es.typed-array.fill');\nrequire('../modules/es.typed-array.filter');\nrequire('../modules/es.typed-array.find');\nrequire('../modules/es.typed-array.find-index');\nrequire('../modules/es.typed-array.for-each');\nrequire('../modules/es.typed-array.includes');\nrequire('../modules/es.typed-array.index-of');\nrequire('../modules/es.typed-array.iterator');\nrequire('../modules/es.typed-array.join');\nrequire('../modules/es.typed-array.last-index-of');\nrequire('../modules/es.typed-array.map');\nrequire('../modules/es.typed-array.reduce');\nrequire('../modules/es.typed-array.reduce-right');\nrequire('../modules/es.typed-array.reverse');\nrequire('../modules/es.typed-array.set');\nrequire('../modules/es.typed-array.slice');\nrequire('../modules/es.typed-array.some');\nrequire('../modules/es.typed-array.sort');\nrequire('../modules/es.typed-array.subarray');\nrequire('../modules/es.typed-array.to-locale-string');\nrequire('../modules/es.typed-array.to-string');\nrequire('../modules/es.reflect.apply');\nrequire('../modules/es.reflect.construct');\nrequire('../modules/es.reflect.define-property');\nrequire('../modules/es.reflect.delete-property');\nrequire('../modules/es.reflect.get');\nrequire('../modules/es.reflect.get-own-property-descriptor');\nrequire('../modules/es.reflect.get-prototype-of');\nrequire('../modules/es.reflect.has');\nrequire('../modules/es.reflect.is-extensible');\nrequire('../modules/es.reflect.own-keys');\nrequire('../modules/es.reflect.prevent-extensions');\nrequire('../modules/es.reflect.set');\nrequire('../modules/es.reflect.set-prototype-of');\nvar path = require('../internals/path');\n\nmodule.exports = path;\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.asyncIterator` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.asynciterator\ndefineWellKnownSymbol('asyncIterator');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.hasInstance` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.hasinstance\ndefineWellKnownSymbol('hasInstance');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.isConcatSpreadable` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.isconcatspreadable\ndefineWellKnownSymbol('isConcatSpreadable');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.iterator` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.iterator\ndefineWellKnownSymbol('iterator');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.match` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.match\ndefineWellKnownSymbol('match');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.matchAll` well-known symbol\ndefineWellKnownSymbol('matchAll');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.replace` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.replace\ndefineWellKnownSymbol('replace');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.search` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.search\ndefineWellKnownSymbol('search');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.species` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.species\ndefineWellKnownSymbol('species');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.split` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.split\ndefineWellKnownSymbol('split');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.toPrimitive` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.toprimitive\ndefineWellKnownSymbol('toPrimitive');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.toStringTag` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.tostringtag\ndefineWellKnownSymbol('toStringTag');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.unscopables` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.unscopables\ndefineWellKnownSymbol('unscopables');\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar create = require('../internals/object-create');\n\n// `Object.create` method\n// https://tc39.github.io/ecma262/#sec-object.create\n$({ target: 'Object', stat: true, sham: !DESCRIPTORS }, {\n  create: create\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar objectDefinePropertyModile = require('../internals/object-define-property');\n\n// `Object.defineProperty` method\n// https://tc39.github.io/ecma262/#sec-object.defineproperty\n$({ target: 'Object', stat: true, forced: !DESCRIPTORS, sham: !DESCRIPTORS }, {\n  defineProperty: objectDefinePropertyModile.f\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar defineProperties = require('../internals/object-define-properties');\n\n// `Object.defineProperties` method\n// https://tc39.github.io/ecma262/#sec-object.defineproperties\n$({ target: 'Object', stat: true, forced: !DESCRIPTORS, sham: !DESCRIPTORS }, {\n  defineProperties: defineProperties\n});\n","var $ = require('../internals/export');\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\n\nvar nativeFreeze = Object.freeze;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeFreeze(1); });\n\n// `Object.freeze` method\n// https://tc39.github.io/ecma262/#sec-object.freeze\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  freeze: function freeze(it) {\n    return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;\n  }\n});\n","var $ = require('../internals/export');\nvar iterate = require('../internals/iterate');\nvar createProperty = require('../internals/create-property');\n\n// `Object.fromEntries` method\n// https://github.com/tc39/proposal-object-from-entries\n$({ target: 'Object', stat: true }, {\n  fromEntries: function fromEntries(iterable) {\n    var obj = {};\n    iterate(iterable, function (k, v) {\n      createProperty(obj, k, v);\n    }, undefined, true);\n    return obj;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetOwnPropertyDescriptor(1); });\nvar FORCED = !DESCRIPTORS || FAILS_ON_PRIMITIVES;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor\n$({ target: 'Object', stat: true, forced: FORCED, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {\n    return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);\n  }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar ownKeys = require('../internals/own-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar createProperty = require('../internals/create-property');\n\n// `Object.getOwnPropertyDescriptors` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors\n$({ target: 'Object', stat: true, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {\n    var O = toIndexedObject(object);\n    var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n    var keys = ownKeys(O);\n    var result = {};\n    var index = 0;\n    var key, descriptor;\n    while (keys.length > index) {\n      descriptor = getOwnPropertyDescriptor(O, key = keys[index++]);\n      if (descriptor !== undefined) createProperty(result, key, descriptor);\n    }\n    return result;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar nativeGetOwnPropertyNames = require('../internals/object-get-own-property-names-external').f;\n\nvar FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });\n\n// `Object.getOwnPropertyNames` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertynames\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  getOwnPropertyNames: nativeGetOwnPropertyNames\n});\n","var $ = require('../internals/export');\nvar is = require('../internals/same-value');\n\n// `Object.is` method\n// https://tc39.github.io/ecma262/#sec-object.is\n$({ target: 'Object', stat: true }, {\n  is: is\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsExtensible = Object.isExtensible;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsExtensible(1); });\n\n// `Object.isExtensible` method\n// https://tc39.github.io/ecma262/#sec-object.isextensible\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isExtensible: function isExtensible(it) {\n    return isObject(it) ? nativeIsExtensible ? nativeIsExtensible(it) : true : false;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsFrozen = Object.isFrozen;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsFrozen(1); });\n\n// `Object.isFrozen` method\n// https://tc39.github.io/ecma262/#sec-object.isfrozen\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isFrozen: function isFrozen(it) {\n    return isObject(it) ? nativeIsFrozen ? nativeIsFrozen(it) : false : true;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsSealed = Object.isSealed;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsSealed(1); });\n\n// `Object.isSealed` method\n// https://tc39.github.io/ecma262/#sec-object.issealed\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isSealed: function isSealed(it) {\n    return isObject(it) ? nativeIsSealed ? nativeIsSealed(it) : false : true;\n  }\n});\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\n\nvar nativePreventExtensions = Object.preventExtensions;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativePreventExtensions(1); });\n\n// `Object.preventExtensions` method\n// https://tc39.github.io/ecma262/#sec-object.preventextensions\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  preventExtensions: function preventExtensions(it) {\n    return nativePreventExtensions && isObject(it) ? nativePreventExtensions(onFreeze(it)) : it;\n  }\n});\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\n\nvar nativeSeal = Object.seal;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeSeal(1); });\n\n// `Object.seal` method\n// https://tc39.github.io/ecma262/#sec-object.seal\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  seal: function seal(it) {\n    return nativeSeal && isObject(it) ? nativeSeal(onFreeze(it)) : it;\n  }\n});\n","var $ = require('../internals/export');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\n\n// `Object.setPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.setprototypeof\n$({ target: 'Object', stat: true }, {\n  setPrototypeOf: setPrototypeOf\n});\n","var $ = require('../internals/export');\nvar $values = require('../internals/object-to-array').values;\n\n// `Object.values` method\n// https://tc39.github.io/ecma262/#sec-object.values\n$({ target: 'Object', stat: true }, {\n  values: function values(O) {\n    return $values(O);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar aFunction = require('../internals/a-function');\nvar definePropertyModule = require('../internals/object-define-property');\n\n// `Object.prototype.__defineGetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__defineGetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __defineGetter__: function __defineGetter__(P, getter) {\n      definePropertyModule.f(toObject(this), P, { get: aFunction(getter), enumerable: true, configurable: true });\n    }\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar aFunction = require('../internals/a-function');\nvar definePropertyModule = require('../internals/object-define-property');\n\n// `Object.prototype.__defineSetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__defineSetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __defineSetter__: function __defineSetter__(P, setter) {\n      definePropertyModule.f(toObject(this), P, { set: aFunction(setter), enumerable: true, configurable: true });\n    }\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Object.prototype.__lookupGetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupGetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __lookupGetter__: function __lookupGetter__(P) {\n      var O = toObject(this);\n      var key = toPrimitive(P, true);\n      var desc;\n      do {\n        if (desc = getOwnPropertyDescriptor(O, key)) return desc.get;\n      } while (O = getPrototypeOf(O));\n    }\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Object.prototype.__lookupSetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupSetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __lookupSetter__: function __lookupSetter__(P) {\n      var O = toObject(this);\n      var key = toPrimitive(P, true);\n      var desc;\n      do {\n        if (desc = getOwnPropertyDescriptor(O, key)) return desc.set;\n      } while (O = getPrototypeOf(O));\n    }\n  });\n}\n","var $ = require('../internals/export');\nvar bind = require('../internals/function-bind');\n\n// `Function.prototype.bind` method\n// https://tc39.github.io/ecma262/#sec-function.prototype.bind\n$({ target: 'Function', proto: true }, {\n  bind: bind\n});\n","'use strict';\nvar isObject = require('../internals/is-object');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar HAS_INSTANCE = wellKnownSymbol('hasInstance');\nvar FunctionPrototype = Function.prototype;\n\n// `Function.prototype[@@hasInstance]` method\n// https://tc39.github.io/ecma262/#sec-function.prototype-@@hasinstance\nif (!(HAS_INSTANCE in FunctionPrototype)) {\n  definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: function (O) {\n    if (typeof this != 'function' || !isObject(O)) return false;\n    if (!isObject(this.prototype)) return O instanceof this;\n    // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:\n    while (O = getPrototypeOf(O)) if (this.prototype === O) return true;\n    return false;\n  } });\n}\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\n\n// `globalThis` object\n// https://github.com/tc39/proposal-global\n$({ global: true }, {\n  globalThis: global\n});\n","var $ = require('../internals/export');\nvar isArray = require('../internals/is-array');\n\n// `Array.isArray` method\n// https://tc39.github.io/ecma262/#sec-array.isarray\n$({ target: 'Array', stat: true }, {\n  isArray: isArray\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar createProperty = require('../internals/create-property');\n\nvar ISNT_GENERIC = fails(function () {\n  function F() { /* empty */ }\n  return !(Array.of.call(F) instanceof F);\n});\n\n// `Array.of` method\n// https://tc39.github.io/ecma262/#sec-array.of\n// WebKit Array.of isn't generic\n$({ target: 'Array', stat: true, forced: ISNT_GENERIC }, {\n  of: function of(/* ...args */) {\n    var index = 0;\n    var argumentsLength = arguments.length;\n    var result = new (typeof this == 'function' ? this : Array)(argumentsLength);\n    while (argumentsLength > index) createProperty(result, index, arguments[index++]);\n    result.length = argumentsLength;\n    return result;\n  }\n});\n","var $ = require('../internals/export');\nvar copyWithin = require('../internals/array-copy-within');\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.copyWithin` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin\n$({ target: 'Array', proto: true }, {\n  copyWithin: copyWithin\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('copyWithin');\n","'use strict';\nvar $ = require('../internals/export');\nvar $every = require('../internals/array-iteration').every;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('every');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('every');\n\n// `Array.prototype.every` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.every\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  every: function every(callbackfn /* , thisArg */) {\n    return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $findIndex = require('../internals/array-iteration').findIndex;\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar FIND_INDEX = 'findIndex';\nvar SKIPS_HOLES = true;\n\nvar USES_TO_LENGTH = arrayMethodUsesToLength(FIND_INDEX);\n\n// Shouldn't skip holes\nif (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.findIndex` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.findindex\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH }, {\n  findIndex: function findIndex(callbackfn /* , that = undefined */) {\n    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND_INDEX);\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flat` method\n// https://github.com/tc39/proposal-flatMap\n$({ target: 'Array', proto: true }, {\n  flat: function flat(/* depthArg = 1 */) {\n    var depthArg = arguments.length ? arguments[0] : undefined;\n    var O = toObject(this);\n    var sourceLen = toLength(O.length);\n    var A = arraySpeciesCreate(O, 0);\n    A.length = flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toInteger(depthArg));\n    return A;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar aFunction = require('../internals/a-function');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flatMap` method\n// https://github.com/tc39/proposal-flatMap\n$({ target: 'Array', proto: true }, {\n  flatMap: function flatMap(callbackfn /* , thisArg */) {\n    var O = toObject(this);\n    var sourceLen = toLength(O.length);\n    var A;\n    aFunction(callbackfn);\n    A = arraySpeciesCreate(O, 0);\n    A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n    return A;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar forEach = require('../internals/array-for-each');\n\n// `Array.prototype.forEach` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\n$({ target: 'Array', proto: true, forced: [].forEach != forEach }, {\n  forEach: forEach\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $indexOf = require('../internals/array-includes').indexOf;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar nativeIndexOf = [].indexOf;\n\nvar NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;\nvar STRICT_METHOD = arrayMethodIsStrict('indexOf');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\n\n// `Array.prototype.indexOf` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.indexof\n$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH }, {\n  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {\n    return NEGATIVE_ZERO\n      // convert -0 to +0\n      ? nativeIndexOf.apply(this, arguments) || 0\n      : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","var $ = require('../internals/export');\nvar lastIndexOf = require('../internals/array-last-index-of');\n\n// `Array.prototype.lastIndexOf` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof\n$({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {\n  lastIndexOf: lastIndexOf\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $reduce = require('../internals/array-reduce').left;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('reduce');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('reduce', { 1: 0 });\n\n// `Array.prototype.reduce` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.reduce\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  reduce: function reduce(callbackfn /* , initialValue */) {\n    return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $reduceRight = require('../internals/array-reduce').right;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('reduceRight');\n// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method\nvar USES_TO_LENGTH = arrayMethodUsesToLength('reduce', { 1: 0 });\n\n// `Array.prototype.reduceRight` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.reduceright\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  reduceRight: function reduceRight(callbackfn /* , initialValue */) {\n    return $reduceRight(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar isArray = require('../internals/is-array');\n\nvar nativeReverse = [].reverse;\nvar test = [1, 2];\n\n// `Array.prototype.reverse` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.reverse\n// fix for Safari 12.0 bug\n// https://bugs.webkit.org/show_bug.cgi?id=188794\n$({ target: 'Array', proto: true, forced: String(test) === String(test.reverse()) }, {\n  reverse: function reverse() {\n    // eslint-disable-next-line no-self-assign\n    if (isArray(this)) this.length = this.length;\n    return nativeReverse.call(this);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $some = require('../internals/array-iteration').some;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('some');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('some');\n\n// `Array.prototype.some` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.some\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  some: function some(callbackfn /* , thisArg */) {\n    return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar toObject = require('../internals/to-object');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar createProperty = require('../internals/create-property');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('splice');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 });\n\nvar max = Math.max;\nvar min = Math.min;\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';\n\n// `Array.prototype.splice` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.splice\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  splice: function splice(start, deleteCount /* , ...items */) {\n    var O = toObject(this);\n    var len = toLength(O.length);\n    var actualStart = toAbsoluteIndex(start, len);\n    var argumentsLength = arguments.length;\n    var insertCount, actualDeleteCount, A, k, from, to;\n    if (argumentsLength === 0) {\n      insertCount = actualDeleteCount = 0;\n    } else if (argumentsLength === 1) {\n      insertCount = 0;\n      actualDeleteCount = len - actualStart;\n    } else {\n      insertCount = argumentsLength - 2;\n      actualDeleteCount = min(max(toInteger(deleteCount), 0), len - actualStart);\n    }\n    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {\n      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);\n    }\n    A = arraySpeciesCreate(O, actualDeleteCount);\n    for (k = 0; k < actualDeleteCount; k++) {\n      from = actualStart + k;\n      if (from in O) createProperty(A, k, O[from]);\n    }\n    A.length = actualDeleteCount;\n    if (insertCount < actualDeleteCount) {\n      for (k = actualStart; k < len - actualDeleteCount; k++) {\n        from = k + actualDeleteCount;\n        to = k + insertCount;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];\n    } else if (insertCount > actualDeleteCount) {\n      for (k = len - actualDeleteCount; k > actualStart; k--) {\n        from = k + actualDeleteCount - 1;\n        to = k + insertCount - 1;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n    }\n    for (k = 0; k < insertCount; k++) {\n      O[k + actualStart] = arguments[k + 2];\n    }\n    O.length = len - actualDeleteCount + insertCount;\n    return A;\n  }\n});\n","var setSpecies = require('../internals/set-species');\n\n// `Array[@@species]` getter\n// https://tc39.github.io/ecma262/#sec-get-array-@@species\nsetSpecies('Array');\n","// this method was added to unscopables after implementation\n// in popular engines, so it's moved to a separate module\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\naddToUnscopables('flat');\n","// this method was added to unscopables after implementation\n// in popular engines, so it's moved to a separate module\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\naddToUnscopables('flatMap');\n","var $ = require('../internals/export');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\nvar fromCharCode = String.fromCharCode;\nvar nativeFromCodePoint = String.fromCodePoint;\n\n// length should be 1, old FF problem\nvar INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;\n\n// `String.fromCodePoint` method\n// https://tc39.github.io/ecma262/#sec-string.fromcodepoint\n$({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {\n  fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars\n    var elements = [];\n    var length = arguments.length;\n    var i = 0;\n    var code;\n    while (length > i) {\n      code = +arguments[i++];\n      if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');\n      elements.push(code < 0x10000\n        ? fromCharCode(code)\n        : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)\n      );\n    } return elements.join('');\n  }\n});\n","var $ = require('../internals/export');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\n\n// `String.raw` method\n// https://tc39.github.io/ecma262/#sec-string.raw\n$({ target: 'String', stat: true }, {\n  raw: function raw(template) {\n    var rawTemplate = toIndexedObject(template.raw);\n    var literalSegments = toLength(rawTemplate.length);\n    var argumentsLength = arguments.length;\n    var elements = [];\n    var i = 0;\n    while (literalSegments > i) {\n      elements.push(String(rawTemplate[i++]));\n      if (i < argumentsLength) elements.push(String(arguments[i]));\n    } return elements.join('');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar codeAt = require('../internals/string-multibyte').codeAt;\n\n// `String.prototype.codePointAt` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.codepointat\n$({ target: 'String', proto: true }, {\n  codePointAt: function codePointAt(pos) {\n    return codeAt(this, pos);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar toLength = require('../internals/to-length');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\nvar IS_PURE = require('../internals/is-pure');\n\nvar nativeEndsWith = ''.endsWith;\nvar min = Math.min;\n\nvar CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('endsWith');\n// https://github.com/zloirock/core-js/pull/702\nvar MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () {\n  var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');\n  return descriptor && !descriptor.writable;\n}();\n\n// `String.prototype.endsWith` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.endswith\n$({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {\n  endsWith: function endsWith(searchString /* , endPosition = @length */) {\n    var that = String(requireObjectCoercible(this));\n    notARegExp(searchString);\n    var endPosition = arguments.length > 1 ? arguments[1] : undefined;\n    var len = toLength(that.length);\n    var end = endPosition === undefined ? len : min(toLength(endPosition), len);\n    var search = String(searchString);\n    return nativeEndsWith\n      ? nativeEndsWith.call(that, search, end)\n      : that.slice(end - search.length, end) === search;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar toLength = require('../internals/to-length');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar classof = require('../internals/classof-raw');\nvar isRegExp = require('../internals/is-regexp');\nvar getRegExpFlags = require('../internals/regexp-flags');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar InternalStateModule = require('../internals/internal-state');\nvar IS_PURE = require('../internals/is-pure');\n\nvar MATCH_ALL = wellKnownSymbol('matchAll');\nvar REGEXP_STRING = 'RegExp String';\nvar REGEXP_STRING_ITERATOR = REGEXP_STRING + ' Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(REGEXP_STRING_ITERATOR);\nvar RegExpPrototype = RegExp.prototype;\nvar regExpBuiltinExec = RegExpPrototype.exec;\nvar nativeMatchAll = ''.matchAll;\n\nvar WORKS_WITH_NON_GLOBAL_REGEX = !!nativeMatchAll && !fails(function () {\n  'a'.matchAll(/./);\n});\n\nvar regExpExec = function (R, S) {\n  var exec = R.exec;\n  var result;\n  if (typeof exec == 'function') {\n    result = exec.call(R, S);\n    if (typeof result != 'object') throw TypeError('Incorrect exec result');\n    return result;\n  } return regExpBuiltinExec.call(R, S);\n};\n\n// eslint-disable-next-line max-len\nvar $RegExpStringIterator = createIteratorConstructor(function RegExpStringIterator(regexp, string, global, fullUnicode) {\n  setInternalState(this, {\n    type: REGEXP_STRING_ITERATOR,\n    regexp: regexp,\n    string: string,\n    global: global,\n    unicode: fullUnicode,\n    done: false\n  });\n}, REGEXP_STRING, function next() {\n  var state = getInternalState(this);\n  if (state.done) return { value: undefined, done: true };\n  var R = state.regexp;\n  var S = state.string;\n  var match = regExpExec(R, S);\n  if (match === null) return { value: undefined, done: state.done = true };\n  if (state.global) {\n    if (String(match[0]) == '') R.lastIndex = advanceStringIndex(S, toLength(R.lastIndex), state.unicode);\n    return { value: match, done: false };\n  }\n  state.done = true;\n  return { value: match, done: false };\n});\n\nvar $matchAll = function (string) {\n  var R = anObject(this);\n  var S = String(string);\n  var C, flagsValue, flags, matcher, global, fullUnicode;\n  C = speciesConstructor(R, RegExp);\n  flagsValue = R.flags;\n  if (flagsValue === undefined && R instanceof RegExp && !('flags' in RegExpPrototype)) {\n    flagsValue = getRegExpFlags.call(R);\n  }\n  flags = flagsValue === undefined ? '' : String(flagsValue);\n  matcher = new C(C === RegExp ? R.source : R, flags);\n  global = !!~flags.indexOf('g');\n  fullUnicode = !!~flags.indexOf('u');\n  matcher.lastIndex = toLength(R.lastIndex);\n  return new $RegExpStringIterator(matcher, S, global, fullUnicode);\n};\n\n// `String.prototype.matchAll` method\n// https://github.com/tc39/proposal-string-matchall\n$({ target: 'String', proto: true, forced: WORKS_WITH_NON_GLOBAL_REGEX }, {\n  matchAll: function matchAll(regexp) {\n    var O = requireObjectCoercible(this);\n    var flags, S, matcher, rx;\n    if (regexp != null) {\n      if (isRegExp(regexp)) {\n        flags = String(requireObjectCoercible('flags' in RegExpPrototype\n          ? regexp.flags\n          : getRegExpFlags.call(regexp)\n        ));\n        if (!~flags.indexOf('g')) throw TypeError('`.matchAll` does not allow non-global regexes');\n      }\n      if (WORKS_WITH_NON_GLOBAL_REGEX) return nativeMatchAll.apply(O, arguments);\n      matcher = regexp[MATCH_ALL];\n      if (matcher === undefined && IS_PURE && classof(regexp) == 'RegExp') matcher = $matchAll;\n      if (matcher != null) return aFunction(matcher).call(regexp, O);\n    } else if (WORKS_WITH_NON_GLOBAL_REGEX) return nativeMatchAll.apply(O, arguments);\n    S = String(O);\n    rx = new RegExp(regexp, 'g');\n    return IS_PURE ? $matchAll.call(rx, S) : rx[MATCH_ALL](S);\n  }\n});\n\nIS_PURE || MATCH_ALL in RegExpPrototype || createNonEnumerableProperty(RegExpPrototype, MATCH_ALL, $matchAll);\n","'use strict';\nvar $ = require('../internals/export');\nvar $padEnd = require('../internals/string-pad').end;\nvar WEBKIT_BUG = require('../internals/string-pad-webkit-bug');\n\n// `String.prototype.padEnd` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.padend\n$({ target: 'String', proto: true, forced: WEBKIT_BUG }, {\n  padEnd: function padEnd(maxLength /* , fillString = ' ' */) {\n    return $padEnd(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $padStart = require('../internals/string-pad').start;\nvar WEBKIT_BUG = require('../internals/string-pad-webkit-bug');\n\n// `String.prototype.padStart` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.padstart\n$({ target: 'String', proto: true, forced: WEBKIT_BUG }, {\n  padStart: function padStart(maxLength /* , fillString = ' ' */) {\n    return $padStart(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","var $ = require('../internals/export');\nvar repeat = require('../internals/string-repeat');\n\n// `String.prototype.repeat` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.repeat\n$({ target: 'String', proto: true }, {\n  repeat: repeat\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar toLength = require('../internals/to-length');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\nvar IS_PURE = require('../internals/is-pure');\n\nvar nativeStartsWith = ''.startsWith;\nvar min = Math.min;\n\nvar CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');\n// https://github.com/zloirock/core-js/pull/702\nvar MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () {\n  var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');\n  return descriptor && !descriptor.writable;\n}();\n\n// `String.prototype.startsWith` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.startswith\n$({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {\n  startsWith: function startsWith(searchString /* , position = 0 */) {\n    var that = String(requireObjectCoercible(this));\n    notARegExp(searchString);\n    var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));\n    var search = String(searchString);\n    return nativeStartsWith\n      ? nativeStartsWith.call(that, search, index)\n      : that.slice(index, index + search.length) === search;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $trimStart = require('../internals/string-trim').start;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\nvar FORCED = forcedStringTrimMethod('trimStart');\n\nvar trimStart = FORCED ? function trimStart() {\n  return $trimStart(this);\n} : ''.trimStart;\n\n// `String.prototype.{ trimStart, trimLeft }` methods\n// https://github.com/tc39/ecmascript-string-left-right-trim\n$({ target: 'String', proto: true, forced: FORCED }, {\n  trimStart: trimStart,\n  trimLeft: trimStart\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $trimEnd = require('../internals/string-trim').end;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\nvar FORCED = forcedStringTrimMethod('trimEnd');\n\nvar trimEnd = FORCED ? function trimEnd() {\n  return $trimEnd(this);\n} : ''.trimEnd;\n\n// `String.prototype.{ trimEnd, trimRight }` methods\n// https://github.com/tc39/ecmascript-string-left-right-trim\n$({ target: 'String', proto: true, forced: FORCED }, {\n  trimEnd: trimEnd,\n  trimRight: trimEnd\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.anchor` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.anchor\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('anchor') }, {\n  anchor: function anchor(name) {\n    return createHTML(this, 'a', 'name', name);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.big` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.big\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('big') }, {\n  big: function big() {\n    return createHTML(this, 'big', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.blink` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.blink\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('blink') }, {\n  blink: function blink() {\n    return createHTML(this, 'blink', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.bold` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.bold\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('bold') }, {\n  bold: function bold() {\n    return createHTML(this, 'b', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fixed` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fixed\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fixed') }, {\n  fixed: function fixed() {\n    return createHTML(this, 'tt', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fontcolor` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fontcolor\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fontcolor') }, {\n  fontcolor: function fontcolor(color) {\n    return createHTML(this, 'font', 'color', color);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fontsize` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fontsize\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fontsize') }, {\n  fontsize: function fontsize(size) {\n    return createHTML(this, 'font', 'size', size);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.italics` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.italics\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('italics') }, {\n  italics: function italics() {\n    return createHTML(this, 'i', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.strike` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.strike\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('strike') }, {\n  strike: function strike() {\n    return createHTML(this, 'strike', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.sub` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.sub\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('sub') }, {\n  sub: function sub() {\n    return createHTML(this, 'sub', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.sup` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.sup\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('sup') }, {\n  sup: function sup() {\n    return createHTML(this, 'sup', '', '');\n  }\n});\n","var DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar defineProperty = require('../internals/object-define-property').f;\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar isRegExp = require('../internals/is-regexp');\nvar getFlags = require('../internals/regexp-flags');\nvar stickyHelpers = require('../internals/regexp-sticky-helpers');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar setInternalState = require('../internals/internal-state').set;\nvar setSpecies = require('../internals/set-species');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\nvar NativeRegExp = global.RegExp;\nvar RegExpPrototype = NativeRegExp.prototype;\nvar re1 = /a/g;\nvar re2 = /a/g;\n\n// \"new\" should create a new object, old webkit bug\nvar CORRECT_NEW = new NativeRegExp(re1) !== re1;\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;\n\nvar FORCED = DESCRIPTORS && isForced('RegExp', (!CORRECT_NEW || UNSUPPORTED_Y || fails(function () {\n  re2[MATCH] = false;\n  // RegExp constructor can alter flags and IsRegExp works correct with @@match\n  return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';\n})));\n\n// `RegExp` constructor\n// https://tc39.github.io/ecma262/#sec-regexp-constructor\nif (FORCED) {\n  var RegExpWrapper = function RegExp(pattern, flags) {\n    var thisIsRegExp = this instanceof RegExpWrapper;\n    var patternIsRegExp = isRegExp(pattern);\n    var flagsAreUndefined = flags === undefined;\n    var sticky;\n\n    if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {\n      return pattern;\n    }\n\n    if (CORRECT_NEW) {\n      if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;\n    } else if (pattern instanceof RegExpWrapper) {\n      if (flagsAreUndefined) flags = getFlags.call(pattern);\n      pattern = pattern.source;\n    }\n\n    if (UNSUPPORTED_Y) {\n      sticky = !!flags && flags.indexOf('y') > -1;\n      if (sticky) flags = flags.replace(/y/g, '');\n    }\n\n    var result = inheritIfRequired(\n      CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),\n      thisIsRegExp ? this : RegExpPrototype,\n      RegExpWrapper\n    );\n\n    if (UNSUPPORTED_Y && sticky) setInternalState(result, { sticky: sticky });\n\n    return result;\n  };\n  var proxy = function (key) {\n    key in RegExpWrapper || defineProperty(RegExpWrapper, key, {\n      configurable: true,\n      get: function () { return NativeRegExp[key]; },\n      set: function (it) { NativeRegExp[key] = it; }\n    });\n  };\n  var keys = getOwnPropertyNames(NativeRegExp);\n  var index = 0;\n  while (keys.length > index) proxy(keys[index++]);\n  RegExpPrototype.constructor = RegExpWrapper;\n  RegExpWrapper.prototype = RegExpPrototype;\n  redefine(global, 'RegExp', RegExpWrapper);\n}\n\n// https://tc39.github.io/ecma262/#sec-get-regexp-@@species\nsetSpecies('RegExp');\n","var DESCRIPTORS = require('../internals/descriptors');\nvar objectDefinePropertyModule = require('../internals/object-define-property');\nvar regExpFlags = require('../internals/regexp-flags');\nvar UNSUPPORTED_Y = require('../internals/regexp-sticky-helpers').UNSUPPORTED_Y;\n\n// `RegExp.prototype.flags` getter\n// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags\nif (DESCRIPTORS && (/./g.flags != 'g' || UNSUPPORTED_Y)) {\n  objectDefinePropertyModule.f(RegExp.prototype, 'flags', {\n    configurable: true,\n    get: regExpFlags\n  });\n}\n","var DESCRIPTORS = require('../internals/descriptors');\nvar UNSUPPORTED_Y = require('../internals/regexp-sticky-helpers').UNSUPPORTED_Y;\nvar defineProperty = require('../internals/object-define-property').f;\nvar getInternalState = require('../internals/internal-state').get;\nvar RegExpPrototype = RegExp.prototype;\n\n// `RegExp.prototype.sticky` getter\nif (DESCRIPTORS && UNSUPPORTED_Y) {\n  defineProperty(RegExp.prototype, 'sticky', {\n    configurable: true,\n    get: function () {\n      if (this === RegExpPrototype) return undefined;\n      // We can't use InternalStateModule.getterFor because\n      // we don't add metadata for regexps created by a literal.\n      if (this instanceof RegExp) {\n        return !!getInternalState(this).sticky;\n      }\n      throw TypeError('Incompatible receiver, RegExp required');\n    }\n  });\n}\n","'use strict';\n// TODO: Remove from `core-js@4` since it's moved to entry points\nrequire('../modules/es.regexp.exec');\nvar $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\n\nvar DELEGATES_TO_EXEC = function () {\n  var execCalled = false;\n  var re = /[ac]/;\n  re.exec = function () {\n    execCalled = true;\n    return /./.exec.apply(this, arguments);\n  };\n  return re.test('abc') === true && execCalled;\n}();\n\nvar nativeTest = /./.test;\n\n$({ target: 'RegExp', proto: true, forced: !DELEGATES_TO_EXEC }, {\n  test: function (str) {\n    if (typeof this.exec !== 'function') {\n      return nativeTest.call(this, str);\n    }\n    var result = this.exec(str);\n    if (result !== null && !isObject(result)) {\n      throw new Error('RegExp exec method returned something other than an Object or null');\n    }\n    return !!result;\n  }\n});\n","var $ = require('../internals/export');\nvar parseIntImplementation = require('../internals/number-parse-int');\n\n// `parseInt` method\n// https://tc39.github.io/ecma262/#sec-parseint-string-radix\n$({ global: true, forced: parseInt != parseIntImplementation }, {\n  parseInt: parseIntImplementation\n});\n","var $ = require('../internals/export');\nvar parseFloatImplementation = require('../internals/number-parse-float');\n\n// `parseFloat` method\n// https://tc39.github.io/ecma262/#sec-parsefloat-string\n$({ global: true, forced: parseFloat != parseFloatImplementation }, {\n  parseFloat: parseFloatImplementation\n});\n","var $ = require('../internals/export');\n\n// `Number.EPSILON` constant\n// https://tc39.github.io/ecma262/#sec-number.epsilon\n$({ target: 'Number', stat: true }, {\n  EPSILON: Math.pow(2, -52)\n});\n","var $ = require('../internals/export');\nvar numberIsFinite = require('../internals/number-is-finite');\n\n// `Number.isFinite` method\n// https://tc39.github.io/ecma262/#sec-number.isfinite\n$({ target: 'Number', stat: true }, { isFinite: numberIsFinite });\n","var global = require('../internals/global');\n\nvar globalIsFinite = global.isFinite;\n\n// `Number.isFinite` method\n// https://tc39.github.io/ecma262/#sec-number.isfinite\nmodule.exports = Number.isFinite || function isFinite(it) {\n  return typeof it == 'number' && globalIsFinite(it);\n};\n","var $ = require('../internals/export');\nvar isInteger = require('../internals/is-integer');\n\n// `Number.isInteger` method\n// https://tc39.github.io/ecma262/#sec-number.isinteger\n$({ target: 'Number', stat: true }, {\n  isInteger: isInteger\n});\n","var $ = require('../internals/export');\n\n// `Number.isNaN` method\n// https://tc39.github.io/ecma262/#sec-number.isnan\n$({ target: 'Number', stat: true }, {\n  isNaN: function isNaN(number) {\n    // eslint-disable-next-line no-self-compare\n    return number != number;\n  }\n});\n","var $ = require('../internals/export');\nvar isInteger = require('../internals/is-integer');\n\nvar abs = Math.abs;\n\n// `Number.isSafeInteger` method\n// https://tc39.github.io/ecma262/#sec-number.issafeinteger\n$({ target: 'Number', stat: true }, {\n  isSafeInteger: function isSafeInteger(number) {\n    return isInteger(number) && abs(number) <= 0x1FFFFFFFFFFFFF;\n  }\n});\n","var $ = require('../internals/export');\n\n// `Number.MAX_SAFE_INTEGER` constant\n// https://tc39.github.io/ecma262/#sec-number.max_safe_integer\n$({ target: 'Number', stat: true }, {\n  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF\n});\n","var $ = require('../internals/export');\n\n// `Number.MIN_SAFE_INTEGER` constant\n// https://tc39.github.io/ecma262/#sec-number.min_safe_integer\n$({ target: 'Number', stat: true }, {\n  MIN_SAFE_INTEGER: -0x1FFFFFFFFFFFFF\n});\n","var $ = require('../internals/export');\nvar parseFloat = require('../internals/number-parse-float');\n\n// `Number.parseFloat` method\n// https://tc39.github.io/ecma262/#sec-number.parseFloat\n$({ target: 'Number', stat: true, forced: Number.parseFloat != parseFloat }, {\n  parseFloat: parseFloat\n});\n","var $ = require('../internals/export');\nvar parseInt = require('../internals/number-parse-int');\n\n// `Number.parseInt` method\n// https://tc39.github.io/ecma262/#sec-number.parseint\n$({ target: 'Number', stat: true, forced: Number.parseInt != parseInt }, {\n  parseInt: parseInt\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar thisNumberValue = require('../internals/this-number-value');\n\nvar nativeToPrecision = 1.0.toPrecision;\n\nvar FORCED = fails(function () {\n  // IE7-\n  return nativeToPrecision.call(1, undefined) !== '1';\n}) || !fails(function () {\n  // V8 ~ Android 4.3-\n  nativeToPrecision.call({});\n});\n\n// `Number.prototype.toPrecision` method\n// https://tc39.github.io/ecma262/#sec-number.prototype.toprecision\n$({ target: 'Number', proto: true, forced: FORCED }, {\n  toPrecision: function toPrecision(precision) {\n    return precision === undefined\n      ? nativeToPrecision.call(thisNumberValue(this))\n      : nativeToPrecision.call(thisNumberValue(this), precision);\n  }\n});\n","var $ = require('../internals/export');\nvar log1p = require('../internals/math-log1p');\n\nvar nativeAcosh = Math.acosh;\nvar log = Math.log;\nvar sqrt = Math.sqrt;\nvar LN2 = Math.LN2;\n\nvar FORCED = !nativeAcosh\n  // V8 bug: https://code.google.com/p/v8/issues/detail?id=3509\n  || Math.floor(nativeAcosh(Number.MAX_VALUE)) != 710\n  // Tor Browser bug: Math.acosh(Infinity) -> NaN\n  || nativeAcosh(Infinity) != Infinity;\n\n// `Math.acosh` method\n// https://tc39.github.io/ecma262/#sec-math.acosh\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  acosh: function acosh(x) {\n    return (x = +x) < 1 ? NaN : x > 94906265.62425156\n      ? log(x) + LN2\n      : log1p(x - 1 + sqrt(x - 1) * sqrt(x + 1));\n  }\n});\n","var $ = require('../internals/export');\n\nvar nativeAsinh = Math.asinh;\nvar log = Math.log;\nvar sqrt = Math.sqrt;\n\nfunction asinh(x) {\n  return !isFinite(x = +x) || x == 0 ? x : x < 0 ? -asinh(-x) : log(x + sqrt(x * x + 1));\n}\n\n// `Math.asinh` method\n// https://tc39.github.io/ecma262/#sec-math.asinh\n// Tor Browser bug: Math.asinh(0) -> -0\n$({ target: 'Math', stat: true, forced: !(nativeAsinh && 1 / nativeAsinh(0) > 0) }, {\n  asinh: asinh\n});\n","var $ = require('../internals/export');\n\nvar nativeAtanh = Math.atanh;\nvar log = Math.log;\n\n// `Math.atanh` method\n// https://tc39.github.io/ecma262/#sec-math.atanh\n// Tor Browser bug: Math.atanh(-0) -> 0\n$({ target: 'Math', stat: true, forced: !(nativeAtanh && 1 / nativeAtanh(-0) < 0) }, {\n  atanh: function atanh(x) {\n    return (x = +x) == 0 ? x : log((1 + x) / (1 - x)) / 2;\n  }\n});\n","var $ = require('../internals/export');\nvar sign = require('../internals/math-sign');\n\nvar abs = Math.abs;\nvar pow = Math.pow;\n\n// `Math.cbrt` method\n// https://tc39.github.io/ecma262/#sec-math.cbrt\n$({ target: 'Math', stat: true }, {\n  cbrt: function cbrt(x) {\n    return sign(x = +x) * pow(abs(x), 1 / 3);\n  }\n});\n","var $ = require('../internals/export');\n\nvar floor = Math.floor;\nvar log = Math.log;\nvar LOG2E = Math.LOG2E;\n\n// `Math.clz32` method\n// https://tc39.github.io/ecma262/#sec-math.clz32\n$({ target: 'Math', stat: true }, {\n  clz32: function clz32(x) {\n    return (x >>>= 0) ? 31 - floor(log(x + 0.5) * LOG2E) : 32;\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\nvar nativeCosh = Math.cosh;\nvar abs = Math.abs;\nvar E = Math.E;\n\n// `Math.cosh` method\n// https://tc39.github.io/ecma262/#sec-math.cosh\n$({ target: 'Math', stat: true, forced: !nativeCosh || nativeCosh(710) === Infinity }, {\n  cosh: function cosh(x) {\n    var t = expm1(abs(x) - 1) + 1;\n    return (t + 1 / (t * E * E)) * (E / 2);\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\n// `Math.expm1` method\n// https://tc39.github.io/ecma262/#sec-math.expm1\n$({ target: 'Math', stat: true, forced: expm1 != Math.expm1 }, { expm1: expm1 });\n","var $ = require('../internals/export');\nvar fround = require('../internals/math-fround');\n\n// `Math.fround` method\n// https://tc39.github.io/ecma262/#sec-math.fround\n$({ target: 'Math', stat: true }, { fround: fround });\n","var sign = require('../internals/math-sign');\n\nvar abs = Math.abs;\nvar pow = Math.pow;\nvar EPSILON = pow(2, -52);\nvar EPSILON32 = pow(2, -23);\nvar MAX32 = pow(2, 127) * (2 - EPSILON32);\nvar MIN32 = pow(2, -126);\n\nvar roundTiesToEven = function (n) {\n  return n + 1 / EPSILON - 1 / EPSILON;\n};\n\n// `Math.fround` method implementation\n// https://tc39.github.io/ecma262/#sec-math.fround\nmodule.exports = Math.fround || function fround(x) {\n  var $abs = abs(x);\n  var $sign = sign(x);\n  var a, result;\n  if ($abs < MIN32) return $sign * roundTiesToEven($abs / MIN32 / EPSILON32) * MIN32 * EPSILON32;\n  a = (1 + EPSILON32 / EPSILON) * $abs;\n  result = a - (a - $abs);\n  // eslint-disable-next-line no-self-compare\n  if (result > MAX32 || result != result) return $sign * Infinity;\n  return $sign * result;\n};\n","var $ = require('../internals/export');\n\nvar $hypot = Math.hypot;\nvar abs = Math.abs;\nvar sqrt = Math.sqrt;\n\n// Chrome 77 bug\n// https://bugs.chromium.org/p/v8/issues/detail?id=9546\nvar BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;\n\n// `Math.hypot` method\n// https://tc39.github.io/ecma262/#sec-math.hypot\n$({ target: 'Math', stat: true, forced: BUGGY }, {\n  hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars\n    var sum = 0;\n    var i = 0;\n    var aLen = arguments.length;\n    var larg = 0;\n    var arg, div;\n    while (i < aLen) {\n      arg = abs(arguments[i++]);\n      if (larg < arg) {\n        div = larg / arg;\n        sum = sum * div * div + 1;\n        larg = arg;\n      } else if (arg > 0) {\n        div = arg / larg;\n        sum += div * div;\n      } else sum += arg;\n    }\n    return larg === Infinity ? Infinity : larg * sqrt(sum);\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\n\nvar nativeImul = Math.imul;\n\nvar FORCED = fails(function () {\n  return nativeImul(0xFFFFFFFF, 5) != -5 || nativeImul.length != 2;\n});\n\n// `Math.imul` method\n// https://tc39.github.io/ecma262/#sec-math.imul\n// some WebKit versions fails with big numbers, some has wrong arity\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  imul: function imul(x, y) {\n    var UINT16 = 0xFFFF;\n    var xn = +x;\n    var yn = +y;\n    var xl = UINT16 & xn;\n    var yl = UINT16 & yn;\n    return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);\n  }\n});\n","var $ = require('../internals/export');\n\nvar log = Math.log;\nvar LOG10E = Math.LOG10E;\n\n// `Math.log10` method\n// https://tc39.github.io/ecma262/#sec-math.log10\n$({ target: 'Math', stat: true }, {\n  log10: function log10(x) {\n    return log(x) * LOG10E;\n  }\n});\n","var $ = require('../internals/export');\nvar log1p = require('../internals/math-log1p');\n\n// `Math.log1p` method\n// https://tc39.github.io/ecma262/#sec-math.log1p\n$({ target: 'Math', stat: true }, { log1p: log1p });\n","var $ = require('../internals/export');\n\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\n// `Math.log2` method\n// https://tc39.github.io/ecma262/#sec-math.log2\n$({ target: 'Math', stat: true }, {\n  log2: function log2(x) {\n    return log(x) / LN2;\n  }\n});\n","var $ = require('../internals/export');\nvar sign = require('../internals/math-sign');\n\n// `Math.sign` method\n// https://tc39.github.io/ecma262/#sec-math.sign\n$({ target: 'Math', stat: true }, {\n  sign: sign\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar expm1 = require('../internals/math-expm1');\n\nvar abs = Math.abs;\nvar exp = Math.exp;\nvar E = Math.E;\n\nvar FORCED = fails(function () {\n  return Math.sinh(-2e-17) != -2e-17;\n});\n\n// `Math.sinh` method\n// https://tc39.github.io/ecma262/#sec-math.sinh\n// V8 near Chromium 38 has a problem with very small numbers\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  sinh: function sinh(x) {\n    return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\nvar exp = Math.exp;\n\n// `Math.tanh` method\n// https://tc39.github.io/ecma262/#sec-math.tanh\n$({ target: 'Math', stat: true }, {\n  tanh: function tanh(x) {\n    var a = expm1(x = +x);\n    var b = expm1(-x);\n    return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));\n  }\n});\n","var setToStringTag = require('../internals/set-to-string-tag');\n\n// Math[@@toStringTag] property\n// https://tc39.github.io/ecma262/#sec-math-@@tostringtag\nsetToStringTag(Math, 'Math', true);\n","var $ = require('../internals/export');\n\nvar ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `Math.trunc` method\n// https://tc39.github.io/ecma262/#sec-math.trunc\n$({ target: 'Math', stat: true }, {\n  trunc: function trunc(it) {\n    return (it > 0 ? floor : ceil)(it);\n  }\n});\n","var $ = require('../internals/export');\n\n// `Date.now` method\n// https://tc39.github.io/ecma262/#sec-date.now\n$({ target: 'Date', stat: true }, {\n  now: function now() {\n    return new Date().getTime();\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toObject = require('../internals/to-object');\nvar toPrimitive = require('../internals/to-primitive');\n\nvar FORCED = fails(function () {\n  return new Date(NaN).toJSON() !== null\n    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;\n});\n\n// `Date.prototype.toJSON` method\n// https://tc39.github.io/ecma262/#sec-date.prototype.tojson\n$({ target: 'Date', proto: true, forced: FORCED }, {\n  // eslint-disable-next-line no-unused-vars\n  toJSON: function toJSON(key) {\n    var O = toObject(this);\n    var pv = toPrimitive(O);\n    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();\n  }\n});\n","var $ = require('../internals/export');\nvar toISOString = require('../internals/date-to-iso-string');\n\n// `Date.prototype.toISOString` method\n// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring\n// PhantomJS / old WebKit has a broken implementations\n$({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {\n  toISOString: toISOString\n});\n","'use strict';\nvar fails = require('../internals/fails');\nvar padStart = require('../internals/string-pad').start;\n\nvar abs = Math.abs;\nvar DatePrototype = Date.prototype;\nvar getTime = DatePrototype.getTime;\nvar nativeDateToISOString = DatePrototype.toISOString;\n\n// `Date.prototype.toISOString` method implementation\n// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring\n// PhantomJS / old WebKit fails here:\nmodule.exports = (fails(function () {\n  return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';\n}) || !fails(function () {\n  nativeDateToISOString.call(new Date(NaN));\n})) ? function toISOString() {\n  if (!isFinite(getTime.call(this))) throw RangeError('Invalid time value');\n  var date = this;\n  var year = date.getUTCFullYear();\n  var milliseconds = date.getUTCMilliseconds();\n  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';\n  return sign + padStart(abs(year), sign ? 6 : 4, 0) +\n    '-' + padStart(date.getUTCMonth() + 1, 2, 0) +\n    '-' + padStart(date.getUTCDate(), 2, 0) +\n    'T' + padStart(date.getUTCHours(), 2, 0) +\n    ':' + padStart(date.getUTCMinutes(), 2, 0) +\n    ':' + padStart(date.getUTCSeconds(), 2, 0) +\n    '.' + padStart(milliseconds, 3, 0) +\n    'Z';\n} : nativeDateToISOString;\n","var redefine = require('../internals/redefine');\n\nvar DatePrototype = Date.prototype;\nvar INVALID_DATE = 'Invalid Date';\nvar TO_STRING = 'toString';\nvar nativeDateToString = DatePrototype[TO_STRING];\nvar getTime = DatePrototype.getTime;\n\n// `Date.prototype.toString` method\n// https://tc39.github.io/ecma262/#sec-date.prototype.tostring\nif (new Date(NaN) + '' != INVALID_DATE) {\n  redefine(DatePrototype, TO_STRING, function toString() {\n    var value = getTime.call(this);\n    // eslint-disable-next-line no-self-compare\n    return value === value ? nativeDateToString.call(this) : INVALID_DATE;\n  });\n}\n","var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar dateToPrimitive = require('../internals/date-to-primitive');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar DatePrototype = Date.prototype;\n\n// `Date.prototype[@@toPrimitive]` method\n// https://tc39.github.io/ecma262/#sec-date.prototype-@@toprimitive\nif (!(TO_PRIMITIVE in DatePrototype)) {\n  createNonEnumerableProperty(DatePrototype, TO_PRIMITIVE, dateToPrimitive);\n}\n","'use strict';\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\nmodule.exports = function (hint) {\n  if (hint !== 'string' && hint !== 'number' && hint !== 'default') {\n    throw TypeError('Incorrect hint');\n  } return toPrimitive(anObject(this), hint !== 'number');\n};\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar fails = require('../internals/fails');\n\nvar $stringify = getBuiltIn('JSON', 'stringify');\nvar re = /[\\uD800-\\uDFFF]/g;\nvar low = /^[\\uD800-\\uDBFF]$/;\nvar hi = /^[\\uDC00-\\uDFFF]$/;\n\nvar fix = function (match, offset, string) {\n  var prev = string.charAt(offset - 1);\n  var next = string.charAt(offset + 1);\n  if ((low.test(match) && !hi.test(next)) || (hi.test(match) && !low.test(prev))) {\n    return '\\\\u' + match.charCodeAt(0).toString(16);\n  } return match;\n};\n\nvar FORCED = fails(function () {\n  return $stringify('\\uDF06\\uD834') !== '\"\\\\udf06\\\\ud834\"'\n    || $stringify('\\uDEAD') !== '\"\\\\udead\"';\n});\n\nif ($stringify) {\n  // https://github.com/tc39/proposal-well-formed-stringify\n  $({ target: 'JSON', stat: true, forced: FORCED }, {\n    // eslint-disable-next-line no-unused-vars\n    stringify: function stringify(it, replacer, space) {\n      var result = $stringify.apply(null, arguments);\n      return typeof result == 'string' ? result.replace(re, fix) : result;\n    }\n  });\n}\n","var global = require('../internals/global');\nvar setToStringTag = require('../internals/set-to-string-tag');\n\n// JSON[@@toStringTag] property\n// https://tc39.github.io/ecma262/#sec-json-@@tostringtag\nsetToStringTag(global.JSON, 'JSON', true);\n","'use strict';\nvar $ = require('../internals/export');\nvar aFunction = require('../internals/a-function');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar iterate = require('../internals/iterate');\n\n// `Promise.allSettled` method\n// https://github.com/tc39/proposal-promise-allSettled\n$({ target: 'Promise', stat: true }, {\n  allSettled: function allSettled(iterable) {\n    var C = this;\n    var capability = newPromiseCapabilityModule.f(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = perform(function () {\n      var promiseResolve = aFunction(C.resolve);\n      var values = [];\n      var counter = 0;\n      var remaining = 1;\n      iterate(iterable, function (promise) {\n        var index = counter++;\n        var alreadyCalled = false;\n        values.push(undefined);\n        remaining++;\n        promiseResolve.call(C, promise).then(function (value) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = { status: 'fulfilled', value: value };\n          --remaining || resolve(values);\n        }, function (e) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = { status: 'rejected', reason: e };\n          --remaining || resolve(values);\n        });\n      });\n      --remaining || resolve(values);\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar fails = require('../internals/fails');\nvar getBuiltIn = require('../internals/get-built-in');\nvar speciesConstructor = require('../internals/species-constructor');\nvar promiseResolve = require('../internals/promise-resolve');\nvar redefine = require('../internals/redefine');\n\n// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829\nvar NON_GENERIC = !!NativePromise && fails(function () {\n  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });\n});\n\n// `Promise.prototype.finally` method\n// https://tc39.github.io/ecma262/#sec-promise.prototype.finally\n$({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {\n  'finally': function (onFinally) {\n    var C = speciesConstructor(this, getBuiltIn('Promise'));\n    var isFunction = typeof onFinally == 'function';\n    return this.then(\n      isFunction ? function (x) {\n        return promiseResolve(C, onFinally()).then(function () { return x; });\n      } : onFinally,\n      isFunction ? function (e) {\n        return promiseResolve(C, onFinally()).then(function () { throw e; });\n      } : onFinally\n    );\n  }\n});\n\n// patch native Promise.prototype for native async functions\nif (!IS_PURE && typeof NativePromise == 'function' && !NativePromise.prototype['finally']) {\n  redefine(NativePromise.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);\n}\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionStrong = require('../internals/collection-strong');\n\n// `Map` constructor\n// https://tc39.github.io/ecma262/#sec-map-objects\nmodule.exports = collection('Map', function (init) {\n  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionStrong);\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionStrong = require('../internals/collection-strong');\n\n// `Set` constructor\n// https://tc39.github.io/ecma262/#sec-set-objects\nmodule.exports = collection('Set', function (init) {\n  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionStrong);\n","'use strict';\nvar global = require('../internals/global');\nvar redefineAll = require('../internals/redefine-all');\nvar InternalMetadataModule = require('../internals/internal-metadata');\nvar collection = require('../internals/collection');\nvar collectionWeak = require('../internals/collection-weak');\nvar isObject = require('../internals/is-object');\nvar enforceIternalState = require('../internals/internal-state').enforce;\nvar NATIVE_WEAK_MAP = require('../internals/native-weak-map');\n\nvar IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;\nvar isExtensible = Object.isExtensible;\nvar InternalWeakMap;\n\nvar wrapper = function (init) {\n  return function WeakMap() {\n    return init(this, arguments.length ? arguments[0] : undefined);\n  };\n};\n\n// `WeakMap` constructor\n// https://tc39.github.io/ecma262/#sec-weakmap-constructor\nvar $WeakMap = module.exports = collection('WeakMap', wrapper, collectionWeak);\n\n// IE11 WeakMap frozen keys fix\n// We can't use feature detection because it crash some old IE builds\n// https://github.com/zloirock/core-js/issues/485\nif (NATIVE_WEAK_MAP && IS_IE11) {\n  InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);\n  InternalMetadataModule.REQUIRED = true;\n  var WeakMapPrototype = $WeakMap.prototype;\n  var nativeDelete = WeakMapPrototype['delete'];\n  var nativeHas = WeakMapPrototype.has;\n  var nativeGet = WeakMapPrototype.get;\n  var nativeSet = WeakMapPrototype.set;\n  redefineAll(WeakMapPrototype, {\n    'delete': function (key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeDelete.call(this, key) || state.frozen['delete'](key);\n      } return nativeDelete.call(this, key);\n    },\n    has: function has(key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeHas.call(this, key) || state.frozen.has(key);\n      } return nativeHas.call(this, key);\n    },\n    get: function get(key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeHas.call(this, key) ? nativeGet.call(this, key) : state.frozen.get(key);\n      } return nativeGet.call(this, key);\n    },\n    set: function set(key, value) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        nativeHas.call(this, key) ? nativeSet.call(this, key, value) : state.frozen.set(key, value);\n      } else nativeSet.call(this, key, value);\n      return this;\n    }\n  });\n}\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionWeak = require('../internals/collection-weak');\n\n// `WeakSet` constructor\n// https://tc39.github.io/ecma262/#sec-weakset-constructor\ncollection('WeakSet', function (init) {\n  return function WeakSet() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionWeak);\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar arrayBufferModule = require('../internals/array-buffer');\nvar setSpecies = require('../internals/set-species');\n\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar ArrayBuffer = arrayBufferModule[ARRAY_BUFFER];\nvar NativeArrayBuffer = global[ARRAY_BUFFER];\n\n// `ArrayBuffer` constructor\n// https://tc39.github.io/ecma262/#sec-arraybuffer-constructor\n$({ global: true, forced: NativeArrayBuffer !== ArrayBuffer }, {\n  ArrayBuffer: ArrayBuffer\n});\n\nsetSpecies(ARRAY_BUFFER);\n","// IEEE754 conversions based on https://github.com/feross/ieee754\n// eslint-disable-next-line no-shadow-restricted-names\nvar Infinity = 1 / 0;\nvar abs = Math.abs;\nvar pow = Math.pow;\nvar floor = Math.floor;\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\nvar pack = function (number, mantissaLength, bytes) {\n  var buffer = new Array(bytes);\n  var exponentLength = bytes * 8 - mantissaLength - 1;\n  var eMax = (1 << exponentLength) - 1;\n  var eBias = eMax >> 1;\n  var rt = mantissaLength === 23 ? pow(2, -24) - pow(2, -77) : 0;\n  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;\n  var index = 0;\n  var exponent, mantissa, c;\n  number = abs(number);\n  // eslint-disable-next-line no-self-compare\n  if (number != number || number === Infinity) {\n    // eslint-disable-next-line no-self-compare\n    mantissa = number != number ? 1 : 0;\n    exponent = eMax;\n  } else {\n    exponent = floor(log(number) / LN2);\n    if (number * (c = pow(2, -exponent)) < 1) {\n      exponent--;\n      c *= 2;\n    }\n    if (exponent + eBias >= 1) {\n      number += rt / c;\n    } else {\n      number += rt * pow(2, 1 - eBias);\n    }\n    if (number * c >= 2) {\n      exponent++;\n      c /= 2;\n    }\n    if (exponent + eBias >= eMax) {\n      mantissa = 0;\n      exponent = eMax;\n    } else if (exponent + eBias >= 1) {\n      mantissa = (number * c - 1) * pow(2, mantissaLength);\n      exponent = exponent + eBias;\n    } else {\n      mantissa = number * pow(2, eBias - 1) * pow(2, mantissaLength);\n      exponent = 0;\n    }\n  }\n  for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);\n  exponent = exponent << mantissaLength | mantissa;\n  exponentLength += mantissaLength;\n  for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);\n  buffer[--index] |= sign * 128;\n  return buffer;\n};\n\nvar unpack = function (buffer, mantissaLength) {\n  var bytes = buffer.length;\n  var exponentLength = bytes * 8 - mantissaLength - 1;\n  var eMax = (1 << exponentLength) - 1;\n  var eBias = eMax >> 1;\n  var nBits = exponentLength - 7;\n  var index = bytes - 1;\n  var sign = buffer[index--];\n  var exponent = sign & 127;\n  var mantissa;\n  sign >>= 7;\n  for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);\n  mantissa = exponent & (1 << -nBits) - 1;\n  exponent >>= -nBits;\n  nBits += mantissaLength;\n  for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);\n  if (exponent === 0) {\n    exponent = 1 - eBias;\n  } else if (exponent === eMax) {\n    return mantissa ? NaN : sign ? -Infinity : Infinity;\n  } else {\n    mantissa = mantissa + pow(2, mantissaLength);\n    exponent = exponent - eBias;\n  } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);\n};\n\nmodule.exports = {\n  pack: pack,\n  unpack: unpack\n};\n","var $ = require('../internals/export');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;\n\n// `ArrayBuffer.isView` method\n// https://tc39.github.io/ecma262/#sec-arraybuffer.isview\n$({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {\n  isView: ArrayBufferViewCore.isView\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar ArrayBufferModule = require('../internals/array-buffer');\nvar anObject = require('../internals/an-object');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar ArrayBuffer = ArrayBufferModule.ArrayBuffer;\nvar DataView = ArrayBufferModule.DataView;\nvar nativeArrayBufferSlice = ArrayBuffer.prototype.slice;\n\nvar INCORRECT_SLICE = fails(function () {\n  return !new ArrayBuffer(2).slice(1, undefined).byteLength;\n});\n\n// `ArrayBuffer.prototype.slice` method\n// https://tc39.github.io/ecma262/#sec-arraybuffer.prototype.slice\n$({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {\n  slice: function slice(start, end) {\n    if (nativeArrayBufferSlice !== undefined && end === undefined) {\n      return nativeArrayBufferSlice.call(anObject(this), start); // FF fix\n    }\n    var length = anObject(this).byteLength;\n    var first = toAbsoluteIndex(start, length);\n    var fin = toAbsoluteIndex(end === undefined ? length : end, length);\n    var result = new (speciesConstructor(this, ArrayBuffer))(toLength(fin - first));\n    var viewSource = new DataView(this);\n    var viewTarget = new DataView(result);\n    var index = 0;\n    while (first < fin) {\n      viewTarget.setUint8(index++, viewSource.getUint8(first++));\n    } return result;\n  }\n});\n","var $ = require('../internals/export');\nvar ArrayBufferModule = require('../internals/array-buffer');\nvar NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');\n\n// `DataView` constructor\n// https://tc39.github.io/ecma262/#sec-dataview-constructor\n$({ global: true, forced: !NATIVE_ARRAY_BUFFER }, {\n  DataView: ArrayBufferModule.DataView\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int8Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int8', function (init) {\n  return function Int8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var toInteger = require('../internals/to-integer');\n\nmodule.exports = function (it) {\n  var result = toInteger(it);\n  if (result < 0) throw RangeError(\"The argument can't be less than 0\");\n  return result;\n};\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint8Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint8', function (init) {\n  return function Uint8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint8ClampedArray` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint8', function (init) {\n  return function Uint8ClampedArray(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n}, true);\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int16Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int16', function (init) {\n  return function Int16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint16Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint16', function (init) {\n  return function Uint16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int32', function (init) {\n  return function Int32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint32', function (init) {\n  return function Uint32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Float32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Float32', function (init) {\n  return function Float32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Float64Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Float64', function (init) {\n  return function Float64Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","'use strict';\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\nvar exportTypedArrayStaticMethod = require('../internals/array-buffer-view-core').exportTypedArrayStaticMethod;\nvar typedArrayFrom = require('../internals/typed-array-from');\n\n// `%TypedArray%.from` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.from\nexportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\n\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayStaticMethod = ArrayBufferViewCore.exportTypedArrayStaticMethod;\n\n// `%TypedArray%.of` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.of\nexportTypedArrayStaticMethod('of', function of(/* ...items */) {\n  var index = 0;\n  var length = arguments.length;\n  var result = new (aTypedArrayConstructor(this))(length);\n  while (length > index) result[index] = arguments[index++];\n  return result;\n}, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $copyWithin = require('../internals/array-copy-within');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.copyWithin` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.copywithin\nexportTypedArrayMethod('copyWithin', function copyWithin(target, start /* , end */) {\n  return $copyWithin.call(aTypedArray(this), target, start, arguments.length > 2 ? arguments[2] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $every = require('../internals/array-iteration').every;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.every` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every\nexportTypedArrayMethod('every', function every(callbackfn /* , thisArg */) {\n  return $every(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $fill = require('../internals/array-fill');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.fill` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('fill', function fill(value /* , start, end */) {\n  return $fill.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $filter = require('../internals/array-iteration').filter;\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.filter` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter\nexportTypedArrayMethod('filter', function filter(callbackfn /* , thisArg */) {\n  var list = $filter(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  var C = speciesConstructor(this, this.constructor);\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $find = require('../internals/array-iteration').find;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.find` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find\nexportTypedArrayMethod('find', function find(predicate /* , thisArg */) {\n  return $find(aTypedArray(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $findIndex = require('../internals/array-iteration').findIndex;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.findIndex` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex\nexportTypedArrayMethod('findIndex', function findIndex(predicate /* , thisArg */) {\n  return $findIndex(aTypedArray(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.forEach` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach\nexportTypedArrayMethod('forEach', function forEach(callbackfn /* , thisArg */) {\n  $forEach(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $includes = require('../internals/array-includes').includes;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes\nexportTypedArrayMethod('includes', function includes(searchElement /* , fromIndex */) {\n  return $includes(aTypedArray(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $indexOf = require('../internals/array-includes').indexOf;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.indexOf` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof\nexportTypedArrayMethod('indexOf', function indexOf(searchElement /* , fromIndex */) {\n  return $indexOf(aTypedArray(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar global = require('../internals/global');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar ArrayIterators = require('../modules/es.array.iterator');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar Uint8Array = global.Uint8Array;\nvar arrayValues = ArrayIterators.values;\nvar arrayKeys = ArrayIterators.keys;\nvar arrayEntries = ArrayIterators.entries;\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar nativeTypedArrayIterator = Uint8Array && Uint8Array.prototype[ITERATOR];\n\nvar CORRECT_ITER_NAME = !!nativeTypedArrayIterator\n  && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);\n\nvar typedArrayValues = function values() {\n  return arrayValues.call(aTypedArray(this));\n};\n\n// `%TypedArray%.prototype.entries` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries\nexportTypedArrayMethod('entries', function entries() {\n  return arrayEntries.call(aTypedArray(this));\n});\n// `%TypedArray%.prototype.keys` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys\nexportTypedArrayMethod('keys', function keys() {\n  return arrayKeys.call(aTypedArray(this));\n});\n// `%TypedArray%.prototype.values` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values\nexportTypedArrayMethod('values', typedArrayValues, !CORRECT_ITER_NAME);\n// `%TypedArray%.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator\nexportTypedArrayMethod(ITERATOR, typedArrayValues, !CORRECT_ITER_NAME);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $join = [].join;\n\n// `%TypedArray%.prototype.join` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('join', function join(separator) {\n  return $join.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $lastIndexOf = require('../internals/array-last-index-of');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.lastIndexOf` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.lastindexof\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {\n  return $lastIndexOf.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $map = require('../internals/array-iteration').map;\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.map` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.map\nexportTypedArrayMethod('map', function map(mapfn /* , thisArg */) {\n  return $map(aTypedArray(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {\n    return new (aTypedArrayConstructor(speciesConstructor(O, O.constructor)))(length);\n  });\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $reduce = require('../internals/array-reduce').left;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.reduce` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce\nexportTypedArrayMethod('reduce', function reduce(callbackfn /* , initialValue */) {\n  return $reduce(aTypedArray(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $reduceRight = require('../internals/array-reduce').right;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.reduceRicht` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduceright\nexportTypedArrayMethod('reduceRight', function reduceRight(callbackfn /* , initialValue */) {\n  return $reduceRight(aTypedArray(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar floor = Math.floor;\n\n// `%TypedArray%.prototype.reverse` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse\nexportTypedArrayMethod('reverse', function reverse() {\n  var that = this;\n  var length = aTypedArray(that).length;\n  var middle = floor(length / 2);\n  var index = 0;\n  var value;\n  while (index < middle) {\n    value = that[index];\n    that[index++] = that[--length];\n    that[length] = value;\n  } return that;\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar toLength = require('../internals/to-length');\nvar toOffset = require('../internals/to-offset');\nvar toObject = require('../internals/to-object');\nvar fails = require('../internals/fails');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\nvar FORCED = fails(function () {\n  // eslint-disable-next-line no-undef\n  new Int8Array(1).set({});\n});\n\n// `%TypedArray%.prototype.set` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set\nexportTypedArrayMethod('set', function set(arrayLike /* , offset */) {\n  aTypedArray(this);\n  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);\n  var length = this.length;\n  var src = toObject(arrayLike);\n  var len = toLength(src.length);\n  var index = 0;\n  if (len + offset > length) throw RangeError('Wrong length');\n  while (index < len) this[offset + index] = src[index++];\n}, FORCED);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar speciesConstructor = require('../internals/species-constructor');\nvar fails = require('../internals/fails');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $slice = [].slice;\n\nvar FORCED = fails(function () {\n  // eslint-disable-next-line no-undef\n  new Int8Array(1).slice();\n});\n\n// `%TypedArray%.prototype.slice` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.slice\nexportTypedArrayMethod('slice', function slice(start, end) {\n  var list = $slice.call(aTypedArray(this), start, end);\n  var C = speciesConstructor(this, this.constructor);\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n}, FORCED);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $some = require('../internals/array-iteration').some;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.some` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.some\nexportTypedArrayMethod('some', function some(callbackfn /* , thisArg */) {\n  return $some(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $sort = [].sort;\n\n// `%TypedArray%.prototype.sort` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.sort\nexportTypedArrayMethod('sort', function sort(comparefn) {\n  return $sort.call(aTypedArray(this), comparefn);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.subarray` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.subarray\nexportTypedArrayMethod('subarray', function subarray(begin, end) {\n  var O = aTypedArray(this);\n  var length = O.length;\n  var beginIndex = toAbsoluteIndex(begin, length);\n  return new (speciesConstructor(O, O.constructor))(\n    O.buffer,\n    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,\n    toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)\n  );\n});\n","'use strict';\nvar global = require('../internals/global');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar fails = require('../internals/fails');\n\nvar Int8Array = global.Int8Array;\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $toLocaleString = [].toLocaleString;\nvar $slice = [].slice;\n\n// iOS Safari 6.x fails here\nvar TO_LOCALE_STRING_BUG = !!Int8Array && fails(function () {\n  $toLocaleString.call(new Int8Array(1));\n});\n\nvar FORCED = fails(function () {\n  return [1, 2].toLocaleString() != new Int8Array([1, 2]).toLocaleString();\n}) || !fails(function () {\n  Int8Array.prototype.toLocaleString.call([1, 2]);\n});\n\n// `%TypedArray%.prototype.toLocaleString` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tolocalestring\nexportTypedArrayMethod('toLocaleString', function toLocaleString() {\n  return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);\n}, FORCED);\n","'use strict';\nvar exportTypedArrayMethod = require('../internals/array-buffer-view-core').exportTypedArrayMethod;\nvar fails = require('../internals/fails');\nvar global = require('../internals/global');\n\nvar Uint8Array = global.Uint8Array;\nvar Uint8ArrayPrototype = Uint8Array && Uint8Array.prototype || {};\nvar arrayToString = [].toString;\nvar arrayJoin = [].join;\n\nif (fails(function () { arrayToString.call({}); })) {\n  arrayToString = function toString() {\n    return arrayJoin.call(this);\n  };\n}\n\nvar IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;\n\n// `%TypedArray%.prototype.toString` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring\nexportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar fails = require('../internals/fails');\n\nvar nativeApply = getBuiltIn('Reflect', 'apply');\nvar functionApply = Function.apply;\n\n// MS Edge argumentsList argument is optional\nvar OPTIONAL_ARGUMENTS_LIST = !fails(function () {\n  nativeApply(function () { /* empty */ });\n});\n\n// `Reflect.apply` method\n// https://tc39.github.io/ecma262/#sec-reflect.apply\n$({ target: 'Reflect', stat: true, forced: OPTIONAL_ARGUMENTS_LIST }, {\n  apply: function apply(target, thisArgument, argumentsList) {\n    aFunction(target);\n    anObject(argumentsList);\n    return nativeApply\n      ? nativeApply(target, thisArgument, argumentsList)\n      : functionApply.call(target, thisArgument, argumentsList);\n  }\n});\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar bind = require('../internals/function-bind');\nvar fails = require('../internals/fails');\n\nvar nativeConstruct = getBuiltIn('Reflect', 'construct');\n\n// `Reflect.construct` method\n// https://tc39.github.io/ecma262/#sec-reflect.construct\n// MS Edge supports only 2 arguments and argumentsList argument is optional\n// FF Nightly sets third argument as `new.target`, but does not create `this` from it\nvar NEW_TARGET_BUG = fails(function () {\n  function F() { /* empty */ }\n  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);\n});\nvar ARGS_BUG = !fails(function () {\n  nativeConstruct(function () { /* empty */ });\n});\nvar FORCED = NEW_TARGET_BUG || ARGS_BUG;\n\n$({ target: 'Reflect', stat: true, forced: FORCED, sham: FORCED }, {\n  construct: function construct(Target, args /* , newTarget */) {\n    aFunction(Target);\n    anObject(args);\n    var newTarget = arguments.length < 3 ? Target : aFunction(arguments[2]);\n    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);\n    if (Target == newTarget) {\n      // w/o altered newTarget, optimization for 0-4 arguments\n      switch (args.length) {\n        case 0: return new Target();\n        case 1: return new Target(args[0]);\n        case 2: return new Target(args[0], args[1]);\n        case 3: return new Target(args[0], args[1], args[2]);\n        case 4: return new Target(args[0], args[1], args[2], args[3]);\n      }\n      // w/o altered newTarget, lot of arguments case\n      var $args = [null];\n      $args.push.apply($args, args);\n      return new (bind.apply(Target, $args))();\n    }\n    // with altered newTarget, not support built-in constructors\n    var proto = newTarget.prototype;\n    var instance = create(isObject(proto) ? proto : Object.prototype);\n    var result = Function.apply.call(Target, instance, args);\n    return isObject(result) ? result : instance;\n  }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar fails = require('../internals/fails');\n\n// MS Edge has broken Reflect.defineProperty - throwing instead of returning false\nvar ERROR_INSTEAD_OF_FALSE = fails(function () {\n  // eslint-disable-next-line no-undef\n  Reflect.defineProperty(definePropertyModule.f({}, 1, { value: 1 }), 1, { value: 2 });\n});\n\n// `Reflect.defineProperty` method\n// https://tc39.github.io/ecma262/#sec-reflect.defineproperty\n$({ target: 'Reflect', stat: true, forced: ERROR_INSTEAD_OF_FALSE, sham: !DESCRIPTORS }, {\n  defineProperty: function defineProperty(target, propertyKey, attributes) {\n    anObject(target);\n    var key = toPrimitive(propertyKey, true);\n    anObject(attributes);\n    try {\n      definePropertyModule.f(target, key, attributes);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Reflect.deleteProperty` method\n// https://tc39.github.io/ecma262/#sec-reflect.deleteproperty\n$({ target: 'Reflect', stat: true }, {\n  deleteProperty: function deleteProperty(target, propertyKey) {\n    var descriptor = getOwnPropertyDescriptor(anObject(target), propertyKey);\n    return descriptor && !descriptor.configurable ? false : delete target[propertyKey];\n  }\n});\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar has = require('../internals/has');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\n\n// `Reflect.get` method\n// https://tc39.github.io/ecma262/#sec-reflect.get\nfunction get(target, propertyKey /* , receiver */) {\n  var receiver = arguments.length < 3 ? target : arguments[2];\n  var descriptor, prototype;\n  if (anObject(target) === receiver) return target[propertyKey];\n  if (descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey)) return has(descriptor, 'value')\n    ? descriptor.value\n    : descriptor.get === undefined\n      ? undefined\n      : descriptor.get.call(receiver);\n  if (isObject(prototype = getPrototypeOf(target))) return get(prototype, propertyKey, receiver);\n}\n\n$({ target: 'Reflect', stat: true }, {\n  get: get\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar anObject = require('../internals/an-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\n\n// `Reflect.getOwnPropertyDescriptor` method\n// https://tc39.github.io/ecma262/#sec-reflect.getownpropertydescriptor\n$({ target: 'Reflect', stat: true, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {\n    return getOwnPropertyDescriptorModule.f(anObject(target), propertyKey);\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar objectGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\n// `Reflect.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-reflect.getprototypeof\n$({ target: 'Reflect', stat: true, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(target) {\n    return objectGetPrototypeOf(anObject(target));\n  }\n});\n","var $ = require('../internals/export');\n\n// `Reflect.has` method\n// https://tc39.github.io/ecma262/#sec-reflect.has\n$({ target: 'Reflect', stat: true }, {\n  has: function has(target, propertyKey) {\n    return propertyKey in target;\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\n\nvar objectIsExtensible = Object.isExtensible;\n\n// `Reflect.isExtensible` method\n// https://tc39.github.io/ecma262/#sec-reflect.isextensible\n$({ target: 'Reflect', stat: true }, {\n  isExtensible: function isExtensible(target) {\n    anObject(target);\n    return objectIsExtensible ? objectIsExtensible(target) : true;\n  }\n});\n","var $ = require('../internals/export');\nvar ownKeys = require('../internals/own-keys');\n\n// `Reflect.ownKeys` method\n// https://tc39.github.io/ecma262/#sec-reflect.ownkeys\n$({ target: 'Reflect', stat: true }, {\n  ownKeys: ownKeys\n});\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar FREEZING = require('../internals/freezing');\n\n// `Reflect.preventExtensions` method\n// https://tc39.github.io/ecma262/#sec-reflect.preventextensions\n$({ target: 'Reflect', stat: true, sham: !FREEZING }, {\n  preventExtensions: function preventExtensions(target) {\n    anObject(target);\n    try {\n      var objectPreventExtensions = getBuiltIn('Object', 'preventExtensions');\n      if (objectPreventExtensions) objectPreventExtensions(target);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar fails = require('../internals/fails');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\n// `Reflect.set` method\n// https://tc39.github.io/ecma262/#sec-reflect.set\nfunction set(target, propertyKey, V /* , receiver */) {\n  var receiver = arguments.length < 4 ? target : arguments[3];\n  var ownDescriptor = getOwnPropertyDescriptorModule.f(anObject(target), propertyKey);\n  var existingDescriptor, prototype;\n  if (!ownDescriptor) {\n    if (isObject(prototype = getPrototypeOf(target))) {\n      return set(prototype, propertyKey, V, receiver);\n    }\n    ownDescriptor = createPropertyDescriptor(0);\n  }\n  if (has(ownDescriptor, 'value')) {\n    if (ownDescriptor.writable === false || !isObject(receiver)) return false;\n    if (existingDescriptor = getOwnPropertyDescriptorModule.f(receiver, propertyKey)) {\n      if (existingDescriptor.get || existingDescriptor.set || existingDescriptor.writable === false) return false;\n      existingDescriptor.value = V;\n      definePropertyModule.f(receiver, propertyKey, existingDescriptor);\n    } else definePropertyModule.f(receiver, propertyKey, createPropertyDescriptor(0, V));\n    return true;\n  }\n  return ownDescriptor.set === undefined ? false : (ownDescriptor.set.call(receiver, V), true);\n}\n\n// MS Edge 17-18 Reflect.set allows setting the property to object\n// with non-writable property on the prototype\nvar MS_EDGE_BUG = fails(function () {\n  var object = definePropertyModule.f({}, 'a', { configurable: true });\n  // eslint-disable-next-line no-undef\n  return Reflect.set(getPrototypeOf(object), 'a', 1, object) !== false;\n});\n\n$({ target: 'Reflect', stat: true, forced: MS_EDGE_BUG }, {\n  set: set\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\nvar objectSetPrototypeOf = require('../internals/object-set-prototype-of');\n\n// `Reflect.setPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-reflect.setprototypeof\nif (objectSetPrototypeOf) $({ target: 'Reflect', stat: true }, {\n  setPrototypeOf: function setPrototypeOf(target, proto) {\n    anObject(target);\n    aPossiblePrototype(proto);\n    try {\n      objectSetPrototypeOf(target, proto);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","require('../modules/web.dom-collections.for-each');\nrequire('../modules/web.dom-collections.iterator');\nrequire('../modules/web.immediate');\nrequire('../modules/web.queue-microtask');\nrequire('../modules/web.timers');\nrequire('../modules/web.url');\nrequire('../modules/web.url.to-json');\nrequire('../modules/web.url-search-params');\nvar path = require('../internals/path');\n\nmodule.exports = path;\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\nvar task = require('../internals/task');\n\nvar FORCED = !global.setImmediate || !global.clearImmediate;\n\n// http://w3c.github.io/setImmediate/\n$({ global: true, bind: true, enumerable: true, forced: FORCED }, {\n  // `setImmediate` method\n  // http://w3c.github.io/setImmediate/#si-setImmediate\n  setImmediate: task.set,\n  // `clearImmediate` method\n  // http://w3c.github.io/setImmediate/#si-clearImmediate\n  clearImmediate: task.clear\n});\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\nvar microtask = require('../internals/microtask');\nvar classof = require('../internals/classof-raw');\n\nvar process = global.process;\nvar isNode = classof(process) == 'process';\n\n// `queueMicrotask` method\n// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-queuemicrotask\n$({ global: true, enumerable: true, noTargetGet: true }, {\n  queueMicrotask: function queueMicrotask(fn) {\n    var domain = isNode && process.domain;\n    microtask(domain ? domain.bind(fn) : fn);\n  }\n});\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\nvar userAgent = require('../internals/engine-user-agent');\n\nvar slice = [].slice;\nvar MSIE = /MSIE .\\./.test(userAgent); // <- dirty ie9- check\n\nvar wrap = function (scheduler) {\n  return function (handler, timeout /* , ...arguments */) {\n    var boundArgs = arguments.length > 2;\n    var args = boundArgs ? slice.call(arguments, 2) : undefined;\n    return scheduler(boundArgs ? function () {\n      // eslint-disable-next-line no-new-func\n      (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);\n    } : handler, timeout);\n  };\n};\n\n// ie9- setTimeout & setInterval additional parameters fix\n// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers\n$({ global: true, bind: true, forced: MSIE }, {\n  // `setTimeout` method\n  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout\n  setTimeout: wrap(global.setTimeout),\n  // `setInterval` method\n  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval\n  setInterval: wrap(global.setInterval)\n});\n","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nvar Direction;\n\n(function (Direction) {\n  Direction[\"Right\"] = \"to right\";\n  Direction[\"Left\"] = \"to left\";\n  Direction[\"Down\"] = \"to bottom\";\n  Direction[\"Up\"] = \"to top\";\n})(Direction = exports.Direction || (exports.Direction = {}));","function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? 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Fabric.js Copyright 2008-2015, Printio (Juriy Zaytsev, Maxim Chernyak) */\nvar fabric = fabric || {\n  version: '3.6.3'\n};\n\nif (typeof exports !== 'undefined') {\n  exports.fabric = fabric;\n}\n/* _AMD_START_ */\nelse if (typeof define === 'function' && define.amd) {\n  define([], function () {\n    return fabric;\n  });\n}\n/* _AMD_END_ */\n\n\nif (typeof document !== 'undefined' && typeof window !== 'undefined') {\n  if (document instanceof (typeof HTMLDocument !== 'undefined' ? HTMLDocument : Document)) {\n    fabric.document = document;\n  } else {\n    fabric.document = document.implementation.createHTMLDocument('');\n  }\n\n  fabric.window = window;\n} else {\n  // assume we're running under node.js when document/window are not present\n  var jsdom = require('jsdom');\n\n  var virtualWindow = new jsdom.JSDOM(decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'), {\n    features: {\n      FetchExternalResources: ['img']\n    },\n    resources: 'usable'\n  }).window;\n  fabric.document = virtualWindow.document;\n  fabric.jsdomImplForWrapper = require('jsdom/lib/jsdom/living/generated/utils').implForWrapper;\n  fabric.nodeCanvas = require('jsdom/lib/jsdom/utils').Canvas;\n  fabric.window = virtualWindow;\n  DOMParser = fabric.window.DOMParser;\n}\n/**\n * True when in environment that supports touch events\n * @type boolean\n */\n\n\nfabric.isTouchSupported = 'ontouchstart' in fabric.window || 'ontouchstart' in fabric.document || fabric.window && fabric.window.navigator && fabric.window.navigator.maxTouchPoints > 0;\n/**\n * True when in environment that's probably Node.js\n * @type boolean\n */\n\nfabric.isLikelyNode = typeof Buffer !== 'undefined' && typeof window === 'undefined';\n/**\n * Pixel per Inch as a default value set to 96. Can be changed for more realistic conversion.\n */\n\nfabric.DPI = 96;\nfabric.reNum = '(?:[-+]?(?:\\\\d+|\\\\d*\\\\.\\\\d+)(?:[eE][-+]?\\\\d+)?)';\nfabric.rePathCommand = /([-+]?((\\d+\\.\\d+)|((\\d+)|(\\.\\d+)))(?:[eE][-+]?\\d+)?)/ig;\nfabric.reNonWord = /[ \\n\\.,;!\\?\\-]/;\nfabric.fontPaths = {};\nfabric.iMatrix = [1, 0, 0, 1, 0, 0];\nfabric.svgNS = 'http://www.w3.org/2000/svg';\n/**\n * Pixel limit for cache canvases. 1Mpx , 4Mpx should be fine.\n * @since 1.7.14\n * @type Number\n * @default\n */\n\nfabric.perfLimitSizeTotal = 2097152;\n/**\n * Pixel limit for cache canvases width or height. IE fixes the maximum at 5000\n * @since 1.7.14\n * @type Number\n * @default\n */\n\nfabric.maxCacheSideLimit = 4096;\n/**\n * Lowest pixel limit for cache canvases, set at 256PX\n * @since 1.7.14\n * @type Number\n * @default\n */\n\nfabric.minCacheSideLimit = 256;\n/**\n * Cache Object for widths of chars in text rendering.\n */\n\nfabric.charWidthsCache = {};\n/**\n * if webgl is enabled and available, textureSize will determine the size\n * of the canvas backend\n * @since 2.0.0\n * @type Number\n * @default\n */\n\nfabric.textureSize = 2048;\n/**\n * When 'true', style information is not retained when copy/pasting text, making\n * pasted text use destination style.\n * Defaults to 'false'.\n * @type Boolean\n * @default\n */\n\nfabric.disableStyleCopyPaste = false;\n/**\n * Enable webgl for filtering picture is available\n * A filtering backend will be initialized, this will both take memory and\n * time since a default 2048x2048 canvas will be created for the gl context\n * @since 2.0.0\n * @type Boolean\n * @default\n */\n\nfabric.enableGLFiltering = true;\n/**\n * Device Pixel Ratio\n * @see https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/SettingUptheCanvas/SettingUptheCanvas.html\n */\n\nfabric.devicePixelRatio = fabric.window.devicePixelRatio || fabric.window.webkitDevicePixelRatio || fabric.window.mozDevicePixelRatio || 1;\n/**\n * Browser-specific constant to adjust CanvasRenderingContext2D.shadowBlur value,\n * which is unitless and not rendered equally across browsers.\n *\n * Values that work quite well (as of October 2017) are:\n * - Chrome: 1.5\n * - Edge: 1.75\n * - Firefox: 0.9\n * - Safari: 0.95\n *\n * @since 2.0.0\n * @type Number\n * @default 1\n */\n\nfabric.browserShadowBlurConstant = 1;\n/**\n * This object contains the result of arc to beizer conversion for faster retrieving if the same arc needs to be converted again.\n * It was an internal variable, is accessible since version 2.3.4\n */\n\nfabric.arcToSegmentsCache = {};\n/**\n * This object keeps the results of the boundsOfCurve calculation mapped by the joined arguments necessary to calculate it.\n * It does speed up calculation, if you parse and add always the same paths, but in case of heavy usage of freedrawing\n * you do not get any speed benefit and you get a big object in memory.\n * The object was a private variable before, while now is appended to the lib so that you have access to it and you\n * can eventually clear it.\n * It was an internal variable, is accessible since version 2.3.4\n */\n\nfabric.boundsOfCurveCache = {};\n/**\n * If disabled boundsOfCurveCache is not used. For apps that make heavy usage of pencil drawing probably disabling it is better\n * @default true\n */\n\nfabric.cachesBoundsOfCurve = true;\n/**\n * Skip performance testing of setupGLContext and force the use of putImageData that seems to be the one that works best on\n * Chrome + old hardware. if your users are experiencing empty images after filtering you may try to force this to true\n * this has to be set before instantiating the filtering backend ( before filtering the first image )\n * @type Boolean\n * @default false\n */\n\nfabric.forceGLPutImageData = false;\n\nfabric.initFilterBackend = function () {\n  if (fabric.enableGLFiltering && fabric.isWebglSupported && fabric.isWebglSupported(fabric.textureSize)) {\n    console.log('max texture size: ' + fabric.maxTextureSize);\n    return new fabric.WebglFilterBackend({\n      tileSize: fabric.textureSize\n    });\n  } else if (fabric.Canvas2dFilterBackend) {\n    return new fabric.Canvas2dFilterBackend();\n  }\n};\n/*:\n\t----------------------------------------------------\n\tevent.js : 1.1.5 : 2014/02/12 : MIT License\n\t----------------------------------------------------\n\thttps://github.com/mudcube/Event.js\n\t----------------------------------------------------\n\t1  : click, dblclick, dbltap\n\t1+ : tap, longpress, drag, swipe\n\t2+ : pinch, rotate\n\t   : mousewheel, devicemotion, shake\n\t----------------------------------------------------\n\tIdeas for the future\n\t----------------------------------------------------\n\t* GamePad, and other input abstractions.\n\t* Event batching - i.e. for every x fingers down a new gesture is created.\n\t----------------------------------------------------\n\thttp://www.w3.org/TR/2011/WD-touch-events-20110505/\n\t----------------------------------------------------\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\n\n(function (root) {\n  \"use strict\"; // Add custom *EventListener commands to HTMLElements (set false to prevent funkiness).\n\n  root.modifyEventListener = false; // Add bulk *EventListener commands on NodeLists from querySelectorAll and others  (set false to prevent funkiness).\n\n  root.modifySelectors = false;\n\n  root.configure = function (conf) {\n    if (isFinite(conf.modifyEventListener)) root.modifyEventListener = conf.modifyEventListener;\n    if (isFinite(conf.modifySelectors)) root.modifySelectors = conf.modifySelectors; /// Augment event listeners\n\n    if (eventListenersAgumented === false && root.modifyEventListener) {\n      augmentEventListeners();\n    }\n\n    if (selectorsAugmented === false && root.modifySelectors) {\n      augmentSelectors();\n    }\n  }; // Event maintenance.\n\n\n  root.add = function (target, type, listener, configure) {\n    return eventManager(target, type, listener, configure, \"add\");\n  };\n\n  root.remove = function (target, type, listener, configure) {\n    return eventManager(target, type, listener, configure, \"remove\");\n  };\n\n  root.returnFalse = function (event) {\n    return false;\n  };\n\n  root.stop = function (event) {\n    if (!event) return;\n    if (event.stopPropagation) event.stopPropagation();\n    event.cancelBubble = true; // <= IE8\n\n    event.cancelBubbleCount = 0;\n  };\n\n  root.prevent = function (event) {\n    if (!event) return;\n\n    if (event.preventDefault) {\n      event.preventDefault();\n    } else if (event.preventManipulation) {\n      event.preventManipulation(); // MS\n    } else {\n      event.returnValue = false; // <= IE8\n    }\n  };\n\n  root.cancel = function (event) {\n    root.stop(event);\n    root.prevent(event);\n  };\n\n  root.blur = function () {\n    // Blurs the focused element. Useful when using eventjs.cancel as canceling will prevent focused elements from being blurred.\n    var node = document.activeElement;\n    if (!node) return;\n    var nodeName = document.activeElement.nodeName;\n\n    if (nodeName === \"INPUT\" || nodeName === \"TEXTAREA\" || node.contentEditable === \"true\") {\n      if (node.blur) node.blur();\n    }\n  }; // Check whether event is natively supported (via @kangax)\n\n\n  root.getEventSupport = function (target, type) {\n    if (typeof target === \"string\") {\n      type = target;\n      target = window;\n    }\n\n    type = \"on\" + type;\n    if (type in target) return true;\n    if (!target.setAttribute) target = document.createElement(\"div\");\n\n    if (target.setAttribute && target.removeAttribute) {\n      target.setAttribute(type, \"\");\n      var isSupported = typeof target[type] === \"function\";\n      if (typeof target[type] !== \"undefined\") target[type] = null;\n      target.removeAttribute(type);\n      return isSupported;\n    }\n  };\n\n  var clone = function clone(obj) {\n    if (!obj || _typeof(obj) !== 'object') return obj;\n    var temp = new obj.constructor();\n\n    for (var key in obj) {\n      if (!obj[key] || _typeof(obj[key]) !== 'object') {\n        temp[key] = obj[key];\n      } else {\n        // clone sub-object\n        temp[key] = clone(obj[key]);\n      }\n    }\n\n    return temp;\n  }; /// Handle custom *EventListener commands.\n\n\n  var eventManager = function eventManager(target, type, listener, configure, trigger, fromOverwrite) {\n    configure = configure || {}; // Check whether target is a configuration variable;\n\n    if (String(target) === \"[object Object]\") {\n      var data = target;\n      target = data.target;\n      delete data.target; ///\n\n      if (data.type && data.listener) {\n        type = data.type;\n        delete data.type;\n        listener = data.listener;\n        delete data.listener;\n\n        for (var key in data) {\n          configure[key] = data[key];\n        }\n      } else {\n        // specialness\n        for (var param in data) {\n          var value = data[param];\n          if (typeof value === \"function\") continue;\n          configure[param] = value;\n        } ///\n\n\n        var ret = {};\n\n        for (var key in data) {\n          var param = key.split(\",\");\n          var o = data[key];\n          var conf = {};\n\n          for (var k in configure) {\n            // clone base configuration\n            conf[k] = configure[k];\n          } ///\n\n\n          if (typeof o === \"function\") {\n            // without configuration\n            var listener = o;\n          } else if (typeof o.listener === \"function\") {\n            // with configuration\n            var listener = o.listener;\n\n            for (var k in o) {\n              // merge configure into base configuration\n              if (typeof o[k] === \"function\") continue;\n              conf[k] = o[k];\n            }\n          } else {\n            // not a listener\n            continue;\n          } ///\n\n\n          for (var n = 0; n < param.length; n++) {\n            ret[key] = eventjs.add(target, param[n], listener, conf, trigger);\n          }\n        }\n\n        return ret;\n      }\n    } ///\n\n\n    if (!target || !type || !listener) return; // Check for element to load on interval (before onload).\n\n    if (typeof target === \"string\" && type === \"ready\") {\n      if (window.eventjs_stallOnReady) {\n        /// force stall for scripts to load\n        type = \"load\";\n        target = window;\n      } else {\n        //\n        var time = new Date().getTime();\n        var timeout = configure.timeout;\n        var ms = configure.interval || 1000 / 60;\n        var interval = window.setInterval(function () {\n          if (new Date().getTime() - time > timeout) {\n            window.clearInterval(interval);\n          }\n\n          if (document.querySelector(target)) {\n            window.clearInterval(interval);\n            setTimeout(listener, 1);\n          }\n        }, ms);\n        return;\n      }\n    } // Get DOM element from Query Selector.\n\n\n    if (typeof target === \"string\") {\n      target = document.querySelectorAll(target);\n      if (target.length === 0) return createError(\"Missing target on listener!\", arguments); // No results.\n\n      if (target.length === 1) {\n        // Single target.\n        target = target[0];\n      }\n    } /// Handle multiple targets.\n\n\n    var event;\n    var events = {};\n\n    if (target.length > 0 && target !== window) {\n      for (var n0 = 0, length0 = target.length; n0 < length0; n0++) {\n        event = eventManager(target[n0], type, listener, clone(configure), trigger);\n        if (event) events[n0] = event;\n      }\n\n      return createBatchCommands(events);\n    } /// Check for multiple events in one string.\n\n\n    if (typeof type === \"string\") {\n      type = type.toLowerCase();\n\n      if (type.indexOf(\" \") !== -1) {\n        type = type.split(\" \");\n      } else if (type.indexOf(\",\") !== -1) {\n        type = type.split(\",\");\n      }\n    } /// Attach or remove multiple events associated with a target.\n\n\n    if (typeof type !== \"string\") {\n      // Has multiple events.\n      if (typeof type.length === \"number\") {\n        // Handle multiple listeners glued together.\n        for (var n1 = 0, length1 = type.length; n1 < length1; n1++) {\n          // Array [type]\n          event = eventManager(target, type[n1], listener, clone(configure), trigger);\n          if (event) events[type[n1]] = event;\n        }\n      } else {\n        // Handle multiple listeners.\n        for (var key in type) {\n          // Object {type}\n          if (typeof type[key] === \"function\") {\n            // without configuration.\n            event = eventManager(target, key, type[key], clone(configure), trigger);\n          } else {\n            // with configuration.\n            event = eventManager(target, key, type[key].listener, clone(type[key]), trigger);\n          }\n\n          if (event) events[key] = event;\n        }\n      }\n\n      return createBatchCommands(events);\n    } else if (type.indexOf(\"on\") === 0) {\n      // to support things like \"onclick\" instead of \"click\"\n      type = type.substr(2);\n    } // Ensure listener is a function.\n\n\n    if (_typeof(target) !== \"object\") return createError(\"Target is not defined!\", arguments);\n    if (typeof listener !== \"function\") return createError(\"Listener is not a function!\", arguments); // Generate a unique wrapper identifier.\n\n    var useCapture = configure.useCapture || false;\n    var id = getID(target) + \".\" + getID(listener) + \".\" + (useCapture ? 1 : 0); // Handle the event.\n\n    if (root.Gesture && root.Gesture._gestureHandlers[type]) {\n      // Fire custom event.\n      id = type + id;\n\n      if (trigger === \"remove\") {\n        // Remove event listener.\n        if (!wrappers[id]) return; // Already removed.\n\n        wrappers[id].remove();\n        delete wrappers[id];\n      } else if (trigger === \"add\") {\n        // Attach event listener.\n        if (wrappers[id]) {\n          wrappers[id].add();\n          return wrappers[id]; // Already attached.\n        } // Retains \"this\" orientation.\n\n\n        if (configure.useCall && !root.modifyEventListener) {\n          var tmp = listener;\n\n          listener = function listener(event, self) {\n            for (var key in self) {\n              event[key] = self[key];\n            }\n\n            return tmp.call(target, event);\n          };\n        } // Create listener proxy.\n\n\n        configure.gesture = type;\n        configure.target = target;\n        configure.listener = listener;\n        configure.fromOverwrite = fromOverwrite; // Record wrapper.\n\n        wrappers[id] = root.proxy[type](configure);\n      }\n\n      return wrappers[id];\n    } else {\n      // Fire native event.\n      var eventList = getEventList(type);\n\n      for (var n = 0, eventId; n < eventList.length; n++) {\n        type = eventList[n];\n        eventId = type + \".\" + id;\n\n        if (trigger === \"remove\") {\n          // Remove event listener.\n          if (!wrappers[eventId]) continue; // Already removed.\n\n          target[remove](type, listener, useCapture);\n          delete wrappers[eventId];\n        } else if (trigger === \"add\") {\n          // Attach event listener.\n          if (wrappers[eventId]) return wrappers[eventId]; // Already attached.\n\n          target[add](type, listener, useCapture); // Record wrapper.\n\n          wrappers[eventId] = {\n            id: eventId,\n            type: type,\n            target: target,\n            listener: listener,\n            remove: function remove() {\n              for (var n = 0; n < eventList.length; n++) {\n                root.remove(target, eventList[n], listener, configure);\n              }\n            }\n          };\n        }\n      }\n\n      return wrappers[eventId];\n    }\n  }; /// Perform batch actions on multiple events.\n\n\n  var createBatchCommands = function createBatchCommands(events) {\n    return {\n      remove: function remove() {\n        // Remove multiple events.\n        for (var key in events) {\n          events[key].remove();\n        }\n      },\n      add: function add() {\n        // Add multiple events.\n        for (var key in events) {\n          events[key].add();\n        }\n      }\n    };\n  }; /// Display error message in console.\n\n\n  var createError = function createError(message, data) {\n    if (typeof console === \"undefined\") return;\n    if (typeof console.error === \"undefined\") return;\n    console.error(message, data);\n  }; /// Handle naming discrepancies between platforms.\n\n\n  var pointerDefs = {\n    \"msPointer\": [\"MSPointerDown\", \"MSPointerMove\", \"MSPointerUp\"],\n    \"touch\": [\"touchstart\", \"touchmove\", \"touchend\"],\n    \"mouse\": [\"mousedown\", \"mousemove\", \"mouseup\"]\n  };\n  var pointerDetect = {\n    // MSPointer\n    \"MSPointerDown\": 0,\n    \"MSPointerMove\": 1,\n    \"MSPointerUp\": 2,\n    // Touch\n    \"touchstart\": 0,\n    \"touchmove\": 1,\n    \"touchend\": 2,\n    // Mouse\n    \"mousedown\": 0,\n    \"mousemove\": 1,\n    \"mouseup\": 2\n  };\n\n  var getEventSupport = function () {\n    root.supports = {};\n\n    if (window.navigator.msPointerEnabled) {\n      root.supports.msPointer = true;\n    }\n\n    if (root.getEventSupport(\"touchstart\")) {\n      root.supports.touch = true;\n    }\n\n    if (root.getEventSupport(\"mousedown\")) {\n      root.supports.mouse = true;\n    }\n  }();\n\n  var getEventList = function () {\n    return function (type) {\n      var prefix = document.addEventListener ? \"\" : \"on\"; // IE\n\n      var idx = pointerDetect[type];\n\n      if (isFinite(idx)) {\n        var types = [];\n\n        for (var key in root.supports) {\n          types.push(prefix + pointerDefs[key][idx]);\n        }\n\n        return types;\n      } else {\n        return [prefix + type];\n      }\n    };\n  }(); /// Event wrappers to keep track of all events placed in the window.\n\n\n  var wrappers = {};\n  var counter = 0;\n\n  var getID = function getID(object) {\n    if (object === window) return \"#window\";\n    if (object === document) return \"#document\";\n    if (!object.uniqueID) object.uniqueID = \"e\" + counter++;\n    return object.uniqueID;\n  }; /// Detect platforms native *EventListener command.\n\n\n  var add = document.addEventListener ? \"addEventListener\" : \"attachEvent\";\n  var remove = document.removeEventListener ? \"removeEventListener\" : \"detachEvent\";\n  /*\n  \tPointer.js\n  \t----------------------------------------\n  \tModified from; https://github.com/borismus/pointer.js\n  */\n\n  root.createPointerEvent = function (event, self, preventRecord) {\n    var eventName = self.gesture;\n    var target = self.target;\n    var pts = event.changedTouches || root.proxy.getCoords(event);\n\n    if (pts.length) {\n      var pt = pts[0];\n      self.pointers = preventRecord ? [] : pts;\n      self.pageX = pt.pageX;\n      self.pageY = pt.pageY;\n      self.x = self.pageX;\n      self.y = self.pageY;\n    } ///\n\n\n    var newEvent = document.createEvent(\"Event\");\n    newEvent.initEvent(eventName, true, true);\n    newEvent.originalEvent = event;\n\n    for (var k in self) {\n      if (k === \"target\") continue;\n      newEvent[k] = self[k];\n    } ///\n\n\n    var type = newEvent.type;\n\n    if (root.Gesture && root.Gesture._gestureHandlers[type]) {\n      // capture custom events.\n      //\t\ttarget.dispatchEvent(newEvent);\n      self.oldListener.call(target, newEvent, self, false);\n    }\n  };\n\n  var eventListenersAgumented = false;\n\n  var augmentEventListeners = function augmentEventListeners() {\n    /// Allows *EventListener to use custom event proxies.\n    if (!window.HTMLElement) return;\n\n    var augmentEventListener = function augmentEventListener(proto) {\n      var recall = function recall(trigger) {\n        // overwrite native *EventListener's\n        var handle = trigger + \"EventListener\";\n        var handler = proto[handle];\n\n        proto[handle] = function (type, listener, useCapture) {\n          if (root.Gesture && root.Gesture._gestureHandlers[type]) {\n            // capture custom events.\n            var configure = useCapture;\n\n            if (_typeof(useCapture) === \"object\") {\n              configure.useCall = true;\n            } else {\n              // convert to configuration object.\n              configure = {\n                useCall: true,\n                useCapture: useCapture\n              };\n            }\n\n            eventManager(this, type, listener, configure, trigger, true); //\t\t\t\t\thandler.call(this, type, listener, useCapture);\n          } else {\n            // use native function.\n            var types = getEventList(type);\n\n            for (var n = 0; n < types.length; n++) {\n              handler.call(this, types[n], listener, useCapture);\n            }\n          }\n        };\n      };\n\n      recall(\"add\");\n      recall(\"remove\");\n    }; // NOTE: overwriting HTMLElement doesn't do anything in Firefox.\n\n\n    if (navigator.userAgent.match(/Firefox/)) {\n      // TODO: fix Firefox for the general case.\n      augmentEventListener(HTMLDivElement.prototype);\n      augmentEventListener(HTMLCanvasElement.prototype);\n    } else {\n      augmentEventListener(HTMLElement.prototype);\n    }\n\n    augmentEventListener(document);\n    augmentEventListener(window);\n  };\n\n  var selectorsAugmented = false;\n\n  var augmentSelectors = function augmentSelectors() {\n    /// Allows querySelectorAll and other NodeLists to perform *EventListener commands in bulk.\n    var proto = NodeList.prototype;\n\n    proto.removeEventListener = function (type, listener, useCapture) {\n      for (var n = 0, length = this.length; n < length; n++) {\n        this[n].removeEventListener(type, listener, useCapture);\n      }\n    };\n\n    proto.addEventListener = function (type, listener, useCapture) {\n      for (var n = 0, length = this.length; n < length; n++) {\n        this[n].addEventListener(type, listener, useCapture);\n      }\n    };\n  };\n\n  return root;\n})(eventjs);\n/*:\n\t----------------------------------------------------\n\teventjs.proxy : 0.4.2 : 2013/07/17 : MIT License\n\t----------------------------------------------------\n\thttps://github.com/mudcube/eventjs.js\n\t----------------------------------------------------\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n  /*\n  \tCreate a new pointer gesture instance.\n  */\n\n  root.pointerSetup = function (conf, self) {\n    /// Configure.\n    conf.target = conf.target || window;\n    conf.doc = conf.target.ownerDocument || conf.target; // Associated document.\n\n    conf.minFingers = conf.minFingers || conf.fingers || 1; // Minimum required fingers.\n\n    conf.maxFingers = conf.maxFingers || conf.fingers || Infinity; // Maximum allowed fingers.\n\n    conf.position = conf.position || \"relative\"; // Determines what coordinate system points are returned.\n\n    delete conf.fingers; //-\n    /// Convenience data.\n\n    self = self || {};\n    self.enabled = true;\n    self.gesture = conf.gesture;\n    self.target = conf.target;\n    self.env = conf.env; ///\n\n    if (eventjs.modifyEventListener && conf.fromOverwrite) {\n      conf.oldListener = conf.listener;\n      conf.listener = eventjs.createPointerEvent;\n    } /// Convenience commands.\n\n\n    var fingers = 0;\n    var type = self.gesture.indexOf(\"pointer\") === 0 && eventjs.modifyEventListener ? \"pointer\" : \"mouse\";\n    if (conf.oldListener) self.oldListener = conf.oldListener; ///\n\n    self.listener = conf.listener;\n\n    self.proxy = function (listener) {\n      self.defaultListener = conf.listener;\n      conf.listener = listener;\n      listener(conf.event, self);\n    };\n\n    self.add = function () {\n      if (self.enabled === true) return;\n      if (conf.onPointerDown) eventjs.add(conf.target, type + \"down\", conf.onPointerDown);\n      if (conf.onPointerMove) eventjs.add(conf.doc, type + \"move\", conf.onPointerMove);\n      if (conf.onPointerUp) eventjs.add(conf.doc, type + \"up\", conf.onPointerUp);\n      self.enabled = true;\n    };\n\n    self.remove = function () {\n      if (self.enabled === false) return;\n      if (conf.onPointerDown) eventjs.remove(conf.target, type + \"down\", conf.onPointerDown);\n      if (conf.onPointerMove) eventjs.remove(conf.doc, type + \"move\", conf.onPointerMove);\n      if (conf.onPointerUp) eventjs.remove(conf.doc, type + \"up\", conf.onPointerUp);\n      self.reset();\n      self.enabled = false;\n    };\n\n    self.pause = function (opt) {\n      if (conf.onPointerMove && (!opt || opt.move)) eventjs.remove(conf.doc, type + \"move\", conf.onPointerMove);\n      if (conf.onPointerUp && (!opt || opt.up)) eventjs.remove(conf.doc, type + \"up\", conf.onPointerUp);\n      fingers = conf.fingers;\n      conf.fingers = 0;\n    };\n\n    self.resume = function (opt) {\n      if (conf.onPointerMove && (!opt || opt.move)) eventjs.add(conf.doc, type + \"move\", conf.onPointerMove);\n      if (conf.onPointerUp && (!opt || opt.up)) eventjs.add(conf.doc, type + \"up\", conf.onPointerUp);\n      conf.fingers = fingers;\n    };\n\n    self.reset = function () {\n      conf.tracker = {};\n      conf.fingers = 0;\n    }; ///\n\n\n    return self;\n  };\n  /*\n  \tBegin proxied pointer command.\n  */\n\n\n  var sp = eventjs.supports; // Default pointerType\n  ///\n\n  eventjs.isMouse = !!sp.mouse;\n  eventjs.isMSPointer = !!sp.touch;\n  eventjs.isTouch = !!sp.msPointer; ///\n\n  root.pointerStart = function (event, self, conf) {\n    /// tracks multiple inputs\n    var type = (event.type || \"mousedown\").toUpperCase();\n\n    if (type.indexOf(\"MOUSE\") === 0) {\n      eventjs.isMouse = true;\n      eventjs.isTouch = false;\n      eventjs.isMSPointer = false;\n    } else if (type.indexOf(\"TOUCH\") === 0) {\n      eventjs.isMouse = false;\n      eventjs.isTouch = true;\n      eventjs.isMSPointer = false;\n    } else if (type.indexOf(\"MSPOINTER\") === 0) {\n      eventjs.isMouse = false;\n      eventjs.isTouch = false;\n      eventjs.isMSPointer = true;\n    } ///\n\n\n    var addTouchStart = function addTouchStart(touch, sid) {\n      var bbox = conf.bbox;\n      var pt = track[sid] = {}; ///\n\n      switch (conf.position) {\n        case \"absolute\":\n          // Absolute from within window.\n          pt.offsetX = 0;\n          pt.offsetY = 0;\n          break;\n\n        case \"differenceFromLast\":\n          // Since last coordinate recorded.\n          pt.offsetX = touch.pageX;\n          pt.offsetY = touch.pageY;\n          break;\n\n        case \"difference\":\n          // Relative from origin.\n          pt.offsetX = touch.pageX;\n          pt.offsetY = touch.pageY;\n          break;\n\n        case \"move\":\n          // Move target element.\n          pt.offsetX = touch.pageX - bbox.x1;\n          pt.offsetY = touch.pageY - bbox.y1;\n          break;\n\n        default:\n          // Relative from within target.\n          pt.offsetX = bbox.x1 - bbox.scrollLeft;\n          pt.offsetY = bbox.y1 - bbox.scrollTop;\n          break;\n      } ///\n\n\n      var x = touch.pageX - pt.offsetX;\n      var y = touch.pageY - pt.offsetY; ///\n\n      pt.rotation = 0;\n      pt.scale = 1;\n      pt.startTime = pt.moveTime = new Date().getTime();\n      pt.move = {\n        x: x,\n        y: y\n      };\n      pt.start = {\n        x: x,\n        y: y\n      }; ///\n\n      conf.fingers++;\n    }; ///\n\n\n    conf.event = event;\n\n    if (self.defaultListener) {\n      conf.listener = self.defaultListener;\n      delete self.defaultListener;\n    } ///\n\n\n    var isTouchStart = !conf.fingers;\n    var track = conf.tracker;\n    var touches = event.changedTouches || root.getCoords(event);\n    var length = touches.length; // Adding touch events to tracking.\n\n    for (var i = 0; i < length; i++) {\n      var touch = touches[i];\n      var sid = touch.identifier || Infinity; // Touch ID.\n      // Track the current state of the touches.\n\n      if (conf.fingers) {\n        if (conf.fingers >= conf.maxFingers) {\n          var ids = [];\n\n          for (var sid in conf.tracker) {\n            ids.push(sid);\n          }\n\n          self.identifier = ids.join(\",\");\n          return isTouchStart;\n        }\n\n        var fingers = 0; // Finger ID.\n\n        for (var rid in track) {\n          // Replace removed finger.\n          if (track[rid].up) {\n            delete track[rid];\n            addTouchStart(touch, sid);\n            conf.cancel = true;\n            break;\n          }\n\n          fingers++;\n        } // Add additional finger.\n\n\n        if (track[sid]) continue;\n        addTouchStart(touch, sid);\n      } else {\n        // Start tracking fingers.\n        track = conf.tracker = {};\n        self.bbox = conf.bbox = root.getBoundingBox(conf.target);\n        conf.fingers = 0;\n        conf.cancel = false;\n        addTouchStart(touch, sid);\n      }\n    } ///\n\n\n    var ids = [];\n\n    for (var sid in conf.tracker) {\n      ids.push(sid);\n    }\n\n    self.identifier = ids.join(\",\"); ///\n\n    return isTouchStart;\n  };\n  /*\n  \tEnd proxied pointer command.\n  */\n\n\n  root.pointerEnd = function (event, self, conf, onPointerUp) {\n    // Record changed touches have ended (iOS changedTouches is not reliable).\n    var touches = event.touches || [];\n    var length = touches.length;\n    var exists = {};\n\n    for (var i = 0; i < length; i++) {\n      var touch = touches[i];\n      var sid = touch.identifier;\n      exists[sid || Infinity] = true;\n    }\n\n    for (var sid in conf.tracker) {\n      var track = conf.tracker[sid];\n      if (exists[sid] || track.up) continue;\n\n      if (onPointerUp) {\n        // add changedTouches to mouse.\n        onPointerUp({\n          pageX: track.pageX,\n          pageY: track.pageY,\n          changedTouches: [{\n            pageX: track.pageX,\n            pageY: track.pageY,\n            identifier: sid === \"Infinity\" ? Infinity : sid\n          }]\n        }, \"up\");\n      }\n\n      track.up = true;\n      conf.fingers--;\n    }\n    /*\t// This should work but fails in Safari on iOS4 so not using it.\n    \tvar touches = event.changedTouches || root.getCoords(event);\n    \tvar length = touches.length;\n    \t// Record changed touches have ended (this should work).\n    \tfor (var i = 0; i < length; i ++) {\n    \t\tvar touch = touches[i];\n    \t\tvar sid = touch.identifier || Infinity;\n    \t\tvar track = conf.tracker[sid];\n    \t\tif (track && !track.up) {\n    \t\t\tif (onPointerUp) { // add changedTouches to mouse.\n    \t\t\t\tonPointerUp({\n    \t\t\t\t\tchangedTouches: [{\n    \t\t\t\t\t\tpageX: track.pageX,\n    \t\t\t\t\t\tpageY: track.pageY,\n    \t\t\t\t\t\tidentifier: sid === \"Infinity\" ? Infinity : sid\n    \t\t\t\t\t}]\n    \t\t\t\t}, \"up\");\n    \t\t\t}\n    \t\t\ttrack.up = true;\n    \t\t\tconf.fingers --;\n    \t\t}\n    \t} */\n    // Wait for all fingers to be released.\n\n\n    if (conf.fingers !== 0) return false; // Record total number of fingers gesture used.\n\n    var ids = [];\n    conf.gestureFingers = 0;\n\n    for (var sid in conf.tracker) {\n      conf.gestureFingers++;\n      ids.push(sid);\n    }\n\n    self.identifier = ids.join(\",\"); // Our pointer gesture has ended.\n\n    return true;\n  };\n  /*\n  \tReturns mouse coords in an array to match event.*Touches\n  \t------------------------------------------------------------\n  \tvar touch = event.changedTouches || root.getCoords(event);\n  */\n\n\n  root.getCoords = function (event) {\n    if (typeof event.pageX !== \"undefined\") {\n      // Desktop browsers.\n      root.getCoords = function (event) {\n        return Array({\n          type: \"mouse\",\n          x: event.pageX,\n          y: event.pageY,\n          pageX: event.pageX,\n          pageY: event.pageY,\n          identifier: event.pointerId || Infinity // pointerId is MS\n\n        });\n      };\n    } else {\n      // Internet Explorer <= 8.0\n      root.getCoords = function (event) {\n        var doc = document.documentElement;\n        event = event || window.event;\n        return Array({\n          type: \"mouse\",\n          x: event.clientX + doc.scrollLeft,\n          y: event.clientY + doc.scrollTop,\n          pageX: event.clientX + doc.scrollLeft,\n          pageY: event.clientY + doc.scrollTop,\n          identifier: Infinity\n        });\n      };\n    }\n\n    return root.getCoords(event);\n  };\n  /*\n  \tReturns single coords in an object.\n  \t------------------------------------------------------------\n  \tvar mouse = root.getCoord(event);\n  */\n\n\n  root.getCoord = function (event) {\n    if (\"ontouchstart\" in window) {\n      // Mobile browsers.\n      var pX = 0;\n      var pY = 0;\n\n      root.getCoord = function (event) {\n        var touches = event.changedTouches;\n\n        if (touches && touches.length) {\n          // ontouchstart + ontouchmove\n          return {\n            x: pX = touches[0].pageX,\n            y: pY = touches[0].pageY\n          };\n        } else {\n          // ontouchend\n          return {\n            x: pX,\n            y: pY\n          };\n        }\n      };\n    } else if (typeof event.pageX !== \"undefined\" && typeof event.pageY !== \"undefined\") {\n      // Desktop browsers.\n      root.getCoord = function (event) {\n        return {\n          x: event.pageX,\n          y: event.pageY\n        };\n      };\n    } else {\n      // Internet Explorer <=8.0\n      root.getCoord = function (event) {\n        var doc = document.documentElement;\n        event = event || window.event;\n        return {\n          x: event.clientX + doc.scrollLeft,\n          y: event.clientY + doc.scrollTop\n        };\n      };\n    }\n\n    return root.getCoord(event);\n  };\n  /*\n  \tGet target scale and position in space.\n  */\n\n\n  var getPropertyAsFloat = function getPropertyAsFloat(o, type) {\n    var n = parseFloat(o.getPropertyValue(type), 10);\n    return isFinite(n) ? n : 0;\n  };\n\n  root.getBoundingBox = function (o) {\n    if (o === window || o === document) o = document.body; ///\n\n    var bbox = {};\n    var bcr = o.getBoundingClientRect();\n    bbox.width = bcr.width;\n    bbox.height = bcr.height;\n    bbox.x1 = bcr.left;\n    bbox.y1 = bcr.top;\n    bbox.scaleX = bcr.width / o.offsetWidth || 1;\n    bbox.scaleY = bcr.height / o.offsetHeight || 1;\n    bbox.scrollLeft = 0;\n    bbox.scrollTop = 0; ///\n\n    var style = window.getComputedStyle(o);\n    var borderBox = style.getPropertyValue(\"box-sizing\") === \"border-box\"; ///\n\n    if (borderBox === false) {\n      var left = getPropertyAsFloat(style, \"border-left-width\");\n      var right = getPropertyAsFloat(style, \"border-right-width\");\n      var bottom = getPropertyAsFloat(style, \"border-bottom-width\");\n      var top = getPropertyAsFloat(style, \"border-top-width\");\n      bbox.border = [left, right, top, bottom];\n      bbox.x1 += left;\n      bbox.y1 += top;\n      bbox.width -= right + left;\n      bbox.height -= bottom + top;\n    }\n    /*\tvar left = getPropertyAsFloat(style, \"padding-left\");\n    \tvar right = getPropertyAsFloat(style, \"padding-right\");\n    \tvar bottom = getPropertyAsFloat(style, \"padding-bottom\");\n    \tvar top = getPropertyAsFloat(style, \"padding-top\");\n    \tbbox.padding = [ left, right, top, bottom ];*/\n    ///\n\n\n    bbox.x2 = bbox.x1 + bbox.width;\n    bbox.y2 = bbox.y1 + bbox.height; /// Get the scroll of container element.\n\n    var position = style.getPropertyValue(\"position\");\n    var tmp = position === \"fixed\" ? o : o.parentNode;\n\n    while (tmp !== null) {\n      if (tmp === document.body) break;\n      if (tmp.scrollTop === undefined) break;\n      var style = window.getComputedStyle(tmp);\n      var position = style.getPropertyValue(\"position\");\n\n      if (position === \"absolute\") {} else if (position === \"fixed\") {\n        //\t\t\tbbox.scrollTop += document.body.scrollTop;\n        //\t\t\tbbox.scrollLeft += document.body.scrollLeft;\n        bbox.scrollTop -= tmp.parentNode.scrollTop;\n        bbox.scrollLeft -= tmp.parentNode.scrollLeft;\n        break;\n      } else {\n        bbox.scrollLeft += tmp.scrollLeft;\n        bbox.scrollTop += tmp.scrollTop;\n      } ///\n\n\n      tmp = tmp.parentNode;\n    }\n\n    ; ///\n\n    bbox.scrollBodyLeft = window.pageXOffset !== undefined ? window.pageXOffset : (document.documentElement || document.body.parentNode || document.body).scrollLeft;\n    bbox.scrollBodyTop = window.pageYOffset !== undefined ? window.pageYOffset : (document.documentElement || document.body.parentNode || document.body).scrollTop; ///\n\n    bbox.scrollLeft -= bbox.scrollBodyLeft;\n    bbox.scrollTop -= bbox.scrollBodyTop; ///\n\n    return bbox;\n  };\n  /*\n  \tKeep track of metaKey, the proper ctrlKey for users platform.\n  \t----------------------------------------------------\n  \thttp://www.quirksmode.org/js/keys.html\n  \t-----------------------------------\n  \thttp://unixpapa.com/js/key.html\n  */\n\n\n  (function () {\n    var agent = navigator.userAgent.toLowerCase();\n    var mac = agent.indexOf(\"macintosh\") !== -1;\n    var metaKeys;\n\n    if (mac && agent.indexOf(\"khtml\") !== -1) {\n      // chrome, safari.\n      metaKeys = {\n        91: true,\n        93: true\n      };\n    } else if (mac && agent.indexOf(\"firefox\") !== -1) {\n      // mac firefox.\n      metaKeys = {\n        224: true\n      };\n    } else {\n      // windows, linux, or mac opera.\n      metaKeys = {\n        17: true\n      };\n    }\n\n    (root.metaTrackerReset = function () {\n      eventjs.fnKey = root.fnKey = false;\n      eventjs.metaKey = root.metaKey = false;\n      eventjs.escKey = root.escKey = false;\n      eventjs.ctrlKey = root.ctrlKey = false;\n      eventjs.shiftKey = root.shiftKey = false;\n      eventjs.altKey = root.altKey = false;\n    })();\n\n    root.metaTracker = function (event) {\n      var isKeyDown = event.type === \"keydown\";\n      if (event.keyCode === 27) eventjs.escKey = root.escKey = isKeyDown;\n      if (metaKeys[event.keyCode]) eventjs.metaKey = root.metaKey = isKeyDown;\n      eventjs.ctrlKey = root.ctrlKey = event.ctrlKey;\n      eventjs.shiftKey = root.shiftKey = event.shiftKey;\n      eventjs.altKey = root.altKey = event.altKey;\n    };\n  })();\n\n  return root;\n}(eventjs.proxy);\n/*:\n\t----------------------------------------------------\n\t\"MutationObserver\" event proxy.\n\t----------------------------------------------------\n\tauthor: Selvakumar Arumugam - MIT LICENSE\n\t   src: http://stackoverflow.com/questions/10868104/can-you-have-a-javascript-hook-trigger-after-a-dom-elements-style-object-change\n\t----------------------------------------------------\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\n\neventjs.MutationObserver = function () {\n  var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;\n\n  var DOMAttrModifiedSupported = !MutationObserver && function () {\n    var p = document.createElement(\"p\");\n    var flag = false;\n\n    var fn = function fn() {\n      flag = true;\n    };\n\n    if (p.addEventListener) {\n      p.addEventListener(\"DOMAttrModified\", fn, false);\n    } else if (p.attachEvent) {\n      p.attachEvent(\"onDOMAttrModified\", fn);\n    } else {\n      return false;\n    } ///\n\n\n    p.setAttribute(\"id\", \"target\"); ///\n\n    return flag;\n  }(); ///\n\n\n  return function (container, callback) {\n    if (MutationObserver) {\n      var options = {\n        subtree: false,\n        attributes: true\n      };\n      var observer = new MutationObserver(function (mutations) {\n        mutations.forEach(function (e) {\n          callback.call(e.target, e.attributeName);\n        });\n      });\n      observer.observe(container, options);\n    } else if (DOMAttrModifiedSupported) {\n      eventjs.add(container, \"DOMAttrModified\", function (e) {\n        callback.call(container, e.attrName);\n      });\n    } else if (\"onpropertychange\" in document.body) {\n      eventjs.add(container, \"propertychange\", function (e) {\n        callback.call(container, window.event.propertyName);\n      });\n    }\n  };\n}();\n/*:\n\t\"Click\" event proxy.\n\t----------------------------------------------------\n\teventjs.add(window, \"click\", function(event, self) {});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.click = function (conf) {\n    conf.gesture = conf.gesture || \"click\";\n    conf.maxFingers = conf.maxFingers || conf.fingers || 1; /// Tracking the events.\n\n    conf.onPointerDown = function (event) {\n      if (root.pointerStart(event, self, conf)) {\n        eventjs.add(conf.target, \"mouseup\", conf.onPointerUp);\n      }\n    };\n\n    conf.onPointerUp = function (event) {\n      if (root.pointerEnd(event, self, conf)) {\n        eventjs.remove(conf.target, \"mouseup\", conf.onPointerUp);\n        var pointers = event.changedTouches || root.getCoords(event);\n        var pointer = pointers[0];\n        var bbox = conf.bbox;\n        var newbbox = root.getBoundingBox(conf.target);\n        var y = pointer.pageY - newbbox.scrollBodyTop;\n        var x = pointer.pageX - newbbox.scrollBodyLeft; ////\n\n        if (x > bbox.x1 && y > bbox.y1 && x < bbox.x2 && y < bbox.y2 && bbox.scrollTop === newbbox.scrollTop) {\n          // has not been scrolled\n          ///\n          for (var key in conf.tracker) {\n            break;\n          } //- should be modularized? in dblclick too\n\n\n          var point = conf.tracker[key];\n          self.x = point.start.x;\n          self.y = point.start.y; ///\n\n          conf.listener(event, self);\n        }\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf);\n    self.state = \"click\"; // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.click = root.click;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Double-Click\" aka \"Double-Tap\" event proxy.\n\t----------------------------------------------------\n\teventjs.add(window, \"dblclick\", function(event, self) {});\n\t----------------------------------------------------\n\tTouch an target twice for <= 700ms, with less than 25 pixel drift.\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.dbltap = root.dblclick = function (conf) {\n    conf.gesture = conf.gesture || \"dbltap\";\n    conf.maxFingers = conf.maxFingers || conf.fingers || 1; // Setting up local variables.\n\n    var delay = 700; // in milliseconds\n\n    var time0, time1, timeout;\n    var pointer0, pointer1; // Tracking the events.\n\n    conf.onPointerDown = function (event) {\n      var pointers = event.changedTouches || root.getCoords(event);\n\n      if (time0 && !time1) {\n        // Click #2\n        pointer1 = pointers[0];\n        time1 = new Date().getTime() - time0;\n      } else {\n        // Click #1\n        pointer0 = pointers[0];\n        time0 = new Date().getTime();\n        time1 = 0;\n        clearTimeout(timeout);\n        timeout = setTimeout(function () {\n          time0 = 0;\n        }, delay);\n      }\n\n      if (root.pointerStart(event, self, conf)) {\n        eventjs.add(conf.target, \"mousemove\", conf.onPointerMove).listener(event);\n        eventjs.add(conf.target, \"mouseup\", conf.onPointerUp);\n      }\n    };\n\n    conf.onPointerMove = function (event) {\n      if (time0 && !time1) {\n        var pointers = event.changedTouches || root.getCoords(event);\n        pointer1 = pointers[0];\n      }\n\n      var bbox = conf.bbox;\n      var ax = pointer1.pageX - bbox.x1;\n      var ay = pointer1.pageY - bbox.y1;\n\n      if (!(ax > 0 && ax < bbox.width && // Within target coordinates..\n      ay > 0 && ay < bbox.height && Math.abs(pointer1.pageX - pointer0.pageX) <= 25 && // Within drift deviance.\n      Math.abs(pointer1.pageY - pointer0.pageY) <= 25)) {\n        // Cancel out this listener.\n        eventjs.remove(conf.target, \"mousemove\", conf.onPointerMove);\n        clearTimeout(timeout);\n        time0 = time1 = 0;\n      }\n    };\n\n    conf.onPointerUp = function (event) {\n      if (root.pointerEnd(event, self, conf)) {\n        eventjs.remove(conf.target, \"mousemove\", conf.onPointerMove);\n        eventjs.remove(conf.target, \"mouseup\", conf.onPointerUp);\n      }\n\n      if (time0 && time1) {\n        if (time1 <= delay) {\n          // && !(event.cancelBubble && ++event.cancelBubbleCount > 1)) {\n          self.state = conf.gesture;\n\n          for (var key in conf.tracker) {\n            break;\n          }\n\n          var point = conf.tracker[key];\n          self.x = point.start.x;\n          self.y = point.start.y;\n          conf.listener(event, self);\n        }\n\n        clearTimeout(timeout);\n        time0 = time1 = 0;\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf);\n    self.state = \"dblclick\"; // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.dbltap = root.dbltap;\n  eventjs.Gesture._gestureHandlers.dblclick = root.dblclick;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Drag\" event proxy (1+ fingers).\n\t----------------------------------------------------\n\tCONFIGURE: maxFingers, position.\n\t----------------------------------------------------\n\teventjs.add(window, \"drag\", function(event, self) {\n\t\tconsole.log(self.gesture, self.state, self.start, self.x, self.y, self.bbox);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.dragElement = function (that, event) {\n    root.drag({\n      event: event,\n      target: that,\n      position: \"move\",\n      listener: function listener(event, self) {\n        that.style.left = self.x + \"px\";\n        that.style.top = self.y + \"px\";\n        eventjs.prevent(event);\n      }\n    });\n  };\n\n  root.drag = function (conf) {\n    conf.gesture = \"drag\";\n\n    conf.onPointerDown = function (event) {\n      if (root.pointerStart(event, self, conf)) {\n        if (!conf.monitor) {\n          eventjs.add(conf.doc, \"mousemove\", conf.onPointerMove);\n          eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp);\n        }\n      } // Process event listener.\n\n\n      conf.onPointerMove(event, \"down\");\n    };\n\n    conf.onPointerMove = function (event, state) {\n      if (!conf.tracker) return conf.onPointerDown(event);\n      var bbox = conf.bbox;\n      var touches = event.changedTouches || root.getCoords(event);\n      var length = touches.length;\n\n      for (var i = 0; i < length; i++) {\n        var touch = touches[i];\n        var identifier = touch.identifier || Infinity;\n        var pt = conf.tracker[identifier]; // Identifier defined outside of listener.\n\n        if (!pt) continue;\n        pt.pageX = touch.pageX;\n        pt.pageY = touch.pageY; // Record data.\n\n        self.state = state || \"move\";\n        self.identifier = identifier;\n        self.start = pt.start;\n        self.fingers = conf.fingers;\n\n        if (conf.position === \"differenceFromLast\") {\n          self.x = pt.pageX - pt.offsetX;\n          self.y = pt.pageY - pt.offsetY;\n          pt.offsetX = pt.pageX;\n          pt.offsetY = pt.pageY;\n        } else {\n          self.x = pt.pageX - pt.offsetX;\n          self.y = pt.pageY - pt.offsetY;\n        } ///\n\n\n        conf.listener(event, self);\n      }\n    };\n\n    conf.onPointerUp = function (event) {\n      // Remove tracking for touch.\n      if (root.pointerEnd(event, self, conf, conf.onPointerMove)) {\n        if (!conf.monitor) {\n          eventjs.remove(conf.doc, \"mousemove\", conf.onPointerMove);\n          eventjs.remove(conf.doc, \"mouseup\", conf.onPointerUp);\n        }\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf); // Attach events.\n\n    if (conf.event) {\n      conf.onPointerDown(conf.event);\n    } else {\n      //\n      eventjs.add(conf.target, \"mousedown\", conf.onPointerDown);\n\n      if (conf.monitor) {\n        eventjs.add(conf.doc, \"mousemove\", conf.onPointerMove);\n        eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp);\n      }\n    } // Return this object.\n\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.drag = root.drag;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Gesture\" event proxy (2+ fingers).\n\t----------------------------------------------------\n\tCONFIGURE: minFingers, maxFingers.\n\t----------------------------------------------------\n\teventjs.add(window, \"gesture\", function(event, self) {\n\t\tconsole.log(\n\t\t\tself.x, // centroid\n\t\t\tself.y,\n\t\t\tself.rotation,\n\t\t\tself.scale,\n\t\t\tself.fingers,\n\t\t\tself.state\n\t\t);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  var RAD_DEG = Math.PI / 180;\n\n  var getCentroid = function getCentroid(self, points) {\n    var centroidx = 0;\n    var centroidy = 0;\n    var length = 0;\n\n    for (var sid in points) {\n      var touch = points[sid];\n      if (touch.up) continue;\n      centroidx += touch.move.x;\n      centroidy += touch.move.y;\n      length++;\n    }\n\n    self.x = centroidx /= length;\n    self.y = centroidy /= length;\n    return self;\n  };\n\n  root.gesture = function (conf) {\n    conf.gesture = conf.gesture || \"gesture\";\n    conf.minFingers = conf.minFingers || conf.fingers || 2; // Tracking the events.\n\n    conf.onPointerDown = function (event) {\n      var fingers = conf.fingers;\n\n      if (root.pointerStart(event, self, conf)) {\n        eventjs.add(conf.doc, \"mousemove\", conf.onPointerMove);\n        eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp);\n      } // Record gesture start.\n\n\n      if (conf.fingers === conf.minFingers && fingers !== conf.fingers) {\n        self.fingers = conf.minFingers;\n        self.scale = 1;\n        self.rotation = 0;\n        self.state = \"start\";\n        var sids = \"\"; //- FIXME(mud): can generate duplicate IDs.\n\n        for (var key in conf.tracker) {\n          sids += key;\n        }\n\n        self.identifier = parseInt(sids);\n        getCentroid(self, conf.tracker);\n        conf.listener(event, self);\n      }\n    }; ///\n\n\n    conf.onPointerMove = function (event, state) {\n      var bbox = conf.bbox;\n      var points = conf.tracker;\n      var touches = event.changedTouches || root.getCoords(event);\n      var length = touches.length; // Update tracker coordinates.\n\n      for (var i = 0; i < length; i++) {\n        var touch = touches[i];\n        var sid = touch.identifier || Infinity;\n        var pt = points[sid]; // Check whether \"pt\" is used by another gesture.\n\n        if (!pt) continue; // Find the actual coordinates.\n\n        pt.move.x = touch.pageX - bbox.x1;\n        pt.move.y = touch.pageY - bbox.y1;\n      } ///\n\n\n      if (conf.fingers < conf.minFingers) return; ///\n\n      var touches = [];\n      var scale = 0;\n      var rotation = 0; /// Calculate centroid of gesture.\n\n      getCentroid(self, points); ///\n\n      for (var sid in points) {\n        var touch = points[sid];\n        if (touch.up) continue;\n        var start = touch.start;\n\n        if (!start.distance) {\n          var dx = start.x - self.x;\n          var dy = start.y - self.y;\n          start.distance = Math.sqrt(dx * dx + dy * dy);\n          start.angle = Math.atan2(dx, dy) / RAD_DEG;\n        } // Calculate scale.\n\n\n        var dx = touch.move.x - self.x;\n        var dy = touch.move.y - self.y;\n        var distance = Math.sqrt(dx * dx + dy * dy);\n        scale += distance / start.distance; // Calculate rotation.\n\n        var angle = Math.atan2(dx, dy) / RAD_DEG;\n        var rotate = (start.angle - angle + 360) % 360 - 180;\n        touch.DEG2 = touch.DEG1; // Previous degree.\n\n        touch.DEG1 = rotate > 0 ? rotate : -rotate; // Current degree.\n\n        if (typeof touch.DEG2 !== \"undefined\") {\n          if (rotate > 0) {\n            touch.rotation += touch.DEG1 - touch.DEG2;\n          } else {\n            touch.rotation -= touch.DEG1 - touch.DEG2;\n          }\n\n          rotation += touch.rotation;\n        } // Attach current points to self.\n\n\n        touches.push(touch.move);\n      } ///\n\n\n      self.touches = touches;\n      self.fingers = conf.fingers;\n      self.scale = scale / conf.fingers;\n      self.rotation = rotation / conf.fingers;\n      self.state = \"change\";\n      conf.listener(event, self);\n    };\n\n    conf.onPointerUp = function (event) {\n      // Remove tracking for touch.\n      var fingers = conf.fingers;\n\n      if (root.pointerEnd(event, self, conf)) {\n        eventjs.remove(conf.doc, \"mousemove\", conf.onPointerMove);\n        eventjs.remove(conf.doc, \"mouseup\", conf.onPointerUp);\n      } // Check whether fingers has dropped below minFingers.\n\n\n      if (fingers === conf.minFingers && conf.fingers < conf.minFingers) {\n        self.fingers = conf.fingers;\n        self.state = \"end\";\n        conf.listener(event, self);\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf); // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.gesture = root.gesture;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Pointer\" event proxy (1+ fingers).\n\t----------------------------------------------------\n\tCONFIGURE: minFingers, maxFingers.\n\t----------------------------------------------------\n\teventjs.add(window, \"gesture\", function(event, self) {\n\t\tconsole.log(self.rotation, self.scale, self.fingers, self.state);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.pointerdown = root.pointermove = root.pointerup = function (conf) {\n    conf.gesture = conf.gesture || \"pointer\";\n    if (conf.target.isPointerEmitter) return; // Tracking the events.\n\n    var isDown = true;\n\n    conf.onPointerDown = function (event) {\n      isDown = false;\n      self.gesture = \"pointerdown\";\n      conf.listener(event, self);\n    };\n\n    conf.onPointerMove = function (event) {\n      self.gesture = \"pointermove\";\n      conf.listener(event, self, isDown);\n    };\n\n    conf.onPointerUp = function (event) {\n      isDown = true;\n      self.gesture = \"pointerup\";\n      conf.listener(event, self, true);\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf); // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown);\n    eventjs.add(conf.target, \"mousemove\", conf.onPointerMove);\n    eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp); // Return this object.\n\n    conf.target.isPointerEmitter = true;\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.pointerdown = root.pointerdown;\n  eventjs.Gesture._gestureHandlers.pointermove = root.pointermove;\n  eventjs.Gesture._gestureHandlers.pointerup = root.pointerup;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Device Motion\" and \"Shake\" event proxy.\n\t----------------------------------------------------\n\thttp://developer.android.com/reference/android/hardware/Sensoreventjs.html#values\n\t----------------------------------------------------\n\teventjs.add(window, \"shake\", function(event, self) {});\n\teventjs.add(window, \"devicemotion\", function(event, self) {\n\t\tconsole.log(self.acceleration, self.accelerationIncludingGravity);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.shake = function (conf) {\n    // Externally accessible data.\n    var self = {\n      gesture: \"devicemotion\",\n      acceleration: {},\n      accelerationIncludingGravity: {},\n      target: conf.target,\n      listener: conf.listener,\n      remove: function remove() {\n        window.removeEventListener('devicemotion', onDeviceMotion, false);\n      }\n    }; // Setting up local variables.\n\n    var threshold = 4; // Gravitational threshold.\n\n    var timeout = 1000; // Timeout between shake events.\n\n    var timeframe = 200; // Time between shakes.\n\n    var shakes = 3; // Minimum shakes to trigger event.\n\n    var lastShake = new Date().getTime();\n    var gravity = {\n      x: 0,\n      y: 0,\n      z: 0\n    };\n    var delta = {\n      x: {\n        count: 0,\n        value: 0\n      },\n      y: {\n        count: 0,\n        value: 0\n      },\n      z: {\n        count: 0,\n        value: 0\n      }\n    }; // Tracking the events.\n\n    var onDeviceMotion = function onDeviceMotion(e) {\n      var alpha = 0.8; // Low pass filter.\n\n      var o = e.accelerationIncludingGravity;\n      gravity.x = alpha * gravity.x + (1 - alpha) * o.x;\n      gravity.y = alpha * gravity.y + (1 - alpha) * o.y;\n      gravity.z = alpha * gravity.z + (1 - alpha) * o.z;\n      self.accelerationIncludingGravity = gravity;\n      self.acceleration.x = o.x - gravity.x;\n      self.acceleration.y = o.y - gravity.y;\n      self.acceleration.z = o.z - gravity.z; ///\n\n      if (conf.gesture === \"devicemotion\") {\n        conf.listener(e, self);\n        return;\n      }\n\n      var data = \"xyz\";\n      var now = new Date().getTime();\n\n      for (var n = 0, length = data.length; n < length; n++) {\n        var letter = data[n];\n        var ACCELERATION = self.acceleration[letter];\n        var DELTA = delta[letter];\n        var abs = Math.abs(ACCELERATION); /// Check whether another shake event was recently registered.\n\n        if (now - lastShake < timeout) continue; /// Check whether delta surpasses threshold.\n\n        if (abs > threshold) {\n          var idx = now * ACCELERATION / abs;\n          var span = Math.abs(idx + DELTA.value); // Check whether last delta was registered within timeframe.\n\n          if (DELTA.value && span < timeframe) {\n            DELTA.value = idx;\n            DELTA.count++; // Check whether delta count has enough shakes.\n\n            if (DELTA.count === shakes) {\n              conf.listener(e, self); // Reset tracking.\n\n              lastShake = now;\n              DELTA.value = 0;\n              DELTA.count = 0;\n            }\n          } else {\n            // Track first shake.\n            DELTA.value = idx;\n            DELTA.count = 1;\n          }\n        }\n      }\n    }; // Attach events.\n\n\n    if (!window.addEventListener) return;\n    window.addEventListener('devicemotion', onDeviceMotion, false); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.shake = root.shake;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Swipe\" event proxy (1+ fingers).\n\t----------------------------------------------------\n\tCONFIGURE: snap, threshold, maxFingers.\n\t----------------------------------------------------\n\teventjs.add(window, \"swipe\", function(event, self) {\n\t\tconsole.log(self.velocity, self.angle);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  var RAD_DEG = Math.PI / 180;\n\n  root.swipe = function (conf) {\n    conf.snap = conf.snap || 90; // angle snap.\n\n    conf.threshold = conf.threshold || 1; // velocity threshold.\n\n    conf.gesture = conf.gesture || \"swipe\"; // Tracking the events.\n\n    conf.onPointerDown = function (event) {\n      if (root.pointerStart(event, self, conf)) {\n        eventjs.add(conf.doc, \"mousemove\", conf.onPointerMove).listener(event);\n        eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp);\n      }\n    };\n\n    conf.onPointerMove = function (event) {\n      var touches = event.changedTouches || root.getCoords(event);\n      var length = touches.length;\n\n      for (var i = 0; i < length; i++) {\n        var touch = touches[i];\n        var sid = touch.identifier || Infinity;\n        var o = conf.tracker[sid]; // Identifier defined outside of listener.\n\n        if (!o) continue;\n        o.move.x = touch.pageX;\n        o.move.y = touch.pageY;\n        o.moveTime = new Date().getTime();\n      }\n    };\n\n    conf.onPointerUp = function (event) {\n      if (root.pointerEnd(event, self, conf)) {\n        eventjs.remove(conf.doc, \"mousemove\", conf.onPointerMove);\n        eventjs.remove(conf.doc, \"mouseup\", conf.onPointerUp); ///\n\n        var velocity1;\n        var velocity2;\n        var degree1;\n        var degree2; /// Calculate centroid of gesture.\n\n        var start = {\n          x: 0,\n          y: 0\n        };\n        var endx = 0;\n        var endy = 0;\n        var length = 0; ///\n\n        for (var sid in conf.tracker) {\n          var touch = conf.tracker[sid];\n          var xdist = touch.move.x - touch.start.x;\n          var ydist = touch.move.y - touch.start.y; ///\n\n          endx += touch.move.x;\n          endy += touch.move.y;\n          start.x += touch.start.x;\n          start.y += touch.start.y;\n          length++; ///\n\n          var distance = Math.sqrt(xdist * xdist + ydist * ydist);\n          var ms = touch.moveTime - touch.startTime;\n          var degree2 = Math.atan2(xdist, ydist) / RAD_DEG + 180;\n          var velocity2 = ms ? distance / ms : 0;\n\n          if (typeof degree1 === \"undefined\") {\n            degree1 = degree2;\n            velocity1 = velocity2;\n          } else if (Math.abs(degree2 - degree1) <= 20) {\n            degree1 = (degree1 + degree2) / 2;\n            velocity1 = (velocity1 + velocity2) / 2;\n          } else {\n            return;\n          }\n        } ///\n\n\n        var fingers = conf.gestureFingers;\n\n        if (conf.minFingers <= fingers && conf.maxFingers >= fingers) {\n          if (velocity1 > conf.threshold) {\n            start.x /= length;\n            start.y /= length;\n            self.start = start;\n            self.x = endx / length;\n            self.y = endy / length;\n            self.angle = -(((degree1 / conf.snap + 0.5 >> 0) * conf.snap || 360) - 360);\n            self.velocity = velocity1;\n            self.fingers = fingers;\n            self.state = \"swipe\";\n            conf.listener(event, self);\n          }\n        }\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf); // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.swipe = root.swipe;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Tap\" and \"Longpress\" event proxy.\n\t----------------------------------------------------\n\tCONFIGURE: delay (longpress), timeout (tap).\n\t----------------------------------------------------\n\teventjs.add(window, \"tap\", function(event, self) {\n\t\tconsole.log(self.fingers);\n\t});\n\t----------------------------------------------------\n\tmulti-finger tap // touch an target for <= 250ms.\n\tmulti-finger longpress // touch an target for >= 500ms\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.longpress = function (conf) {\n    conf.gesture = \"longpress\";\n    return root.tap(conf);\n  };\n\n  root.tap = function (conf) {\n    conf.delay = conf.delay || 500;\n    conf.timeout = conf.timeout || 250;\n    conf.driftDeviance = conf.driftDeviance || 10;\n    conf.gesture = conf.gesture || \"tap\"; // Setting up local variables.\n\n    var timestamp, timeout; // Tracking the events.\n\n    conf.onPointerDown = function (event) {\n      if (root.pointerStart(event, self, conf)) {\n        timestamp = new Date().getTime(); // Initialize event listeners.\n\n        eventjs.add(conf.doc, \"mousemove\", conf.onPointerMove).listener(event);\n        eventjs.add(conf.doc, \"mouseup\", conf.onPointerUp); // Make sure this is a \"longpress\" event.\n\n        if (conf.gesture !== \"longpress\") return;\n        timeout = setTimeout(function () {\n          if (event.cancelBubble && ++event.cancelBubbleCount > 1) return; // Make sure no fingers have been changed.\n\n          var fingers = 0;\n\n          for (var key in conf.tracker) {\n            var point = conf.tracker[key];\n            if (point.end === true) return;\n            if (conf.cancel) return;\n            fingers++;\n          } // Send callback.\n\n\n          if (conf.minFingers <= fingers && conf.maxFingers >= fingers) {\n            self.state = \"start\";\n            self.fingers = fingers;\n            self.x = point.start.x;\n            self.y = point.start.y;\n            conf.listener(event, self);\n          }\n        }, conf.delay);\n      }\n    };\n\n    conf.onPointerMove = function (event) {\n      var bbox = conf.bbox;\n      var touches = event.changedTouches || root.getCoords(event);\n      var length = touches.length;\n\n      for (var i = 0; i < length; i++) {\n        var touch = touches[i];\n        var identifier = touch.identifier || Infinity;\n        var pt = conf.tracker[identifier];\n        if (!pt) continue;\n        var x = touch.pageX - bbox.x1;\n        var y = touch.pageY - bbox.y1; ///\n\n        var dx = x - pt.start.x;\n        var dy = y - pt.start.y;\n        var distance = Math.sqrt(dx * dx + dy * dy);\n\n        if (!(x > 0 && x < bbox.width && // Within target coordinates..\n        y > 0 && y < bbox.height && distance <= conf.driftDeviance)) {\n          // Within drift deviance.\n          // Cancel out this listener.\n          eventjs.remove(conf.doc, \"mousemove\", conf.onPointerMove);\n          conf.cancel = true;\n          return;\n        }\n      }\n    };\n\n    conf.onPointerUp = function (event) {\n      if (root.pointerEnd(event, self, conf)) {\n        clearTimeout(timeout);\n        eventjs.remove(conf.doc, \"mousemove\", conf.onPointerMove);\n        eventjs.remove(conf.doc, \"mouseup\", conf.onPointerUp);\n        if (event.cancelBubble && ++event.cancelBubbleCount > 1) return; // Callback release on longpress.\n\n        if (conf.gesture === \"longpress\") {\n          if (self.state === \"start\") {\n            self.state = \"end\";\n            conf.listener(event, self);\n          }\n\n          return;\n        } // Cancel event due to movement.\n\n\n        if (conf.cancel) return; // Ensure delay is within margins.\n\n        if (new Date().getTime() - timestamp > conf.timeout) return; // Send callback.\n\n        var fingers = conf.gestureFingers;\n\n        if (conf.minFingers <= fingers && conf.maxFingers >= fingers) {\n          self.state = \"tap\";\n          self.fingers = conf.gestureFingers;\n          conf.listener(event, self);\n        }\n      }\n    }; // Generate maintenance commands, and other configurations.\n\n\n    var self = root.pointerSetup(conf); // Attach events.\n\n    eventjs.add(conf.target, \"mousedown\", conf.onPointerDown); // Return this object.\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.tap = root.tap;\n  eventjs.Gesture._gestureHandlers.longpress = root.longpress;\n  return root;\n}(eventjs.proxy);\n/*:\n\t\"Mouse Wheel\" event proxy.\n\t----------------------------------------------------\n\teventjs.add(window, \"wheel\", function(event, self) {\n\t\tconsole.log(self.state, self.wheelDelta);\n\t});\n*/\n\n\nif (typeof eventjs === \"undefined\") var eventjs = {};\nif (typeof eventjs.proxy === \"undefined\") eventjs.proxy = {};\n\neventjs.proxy = function (root) {\n  \"use strict\";\n\n  root.wheelPreventElasticBounce = function (el) {\n    if (!el) return;\n    if (typeof el === \"string\") el = document.querySelector(el);\n    eventjs.add(el, \"wheel\", function (event, self) {\n      self.preventElasticBounce();\n      eventjs.stop(event);\n    });\n  };\n\n  root.wheel = function (conf) {\n    // Configure event listener.\n    var interval;\n    var timeout = conf.timeout || 150;\n    var count = 0; // Externally accessible data.\n\n    var self = {\n      gesture: \"wheel\",\n      state: \"start\",\n      wheelDelta: 0,\n      target: conf.target,\n      listener: conf.listener,\n      preventElasticBounce: function preventElasticBounce(event) {\n        var target = this.target;\n        var scrollTop = target.scrollTop;\n        var top = scrollTop + target.offsetHeight;\n        var height = target.scrollHeight;\n        if (top === height && this.wheelDelta <= 0) eventjs.cancel(event);else if (scrollTop === 0 && this.wheelDelta >= 0) eventjs.cancel(event);\n        eventjs.stop(event);\n      },\n      add: function add() {\n        conf.target[_add](type, onMouseWheel, false);\n      },\n      remove: function remove() {\n        conf.target[_remove](type, onMouseWheel, false);\n      }\n    }; // Tracking the events.\n\n    var onMouseWheel = function onMouseWheel(event) {\n      event = event || window.event;\n      self.state = count++ ? \"change\" : \"start\";\n      self.wheelDelta = event.detail ? event.detail * -20 : event.wheelDelta;\n      conf.listener(event, self);\n      clearTimeout(interval);\n      interval = setTimeout(function () {\n        count = 0;\n        self.state = \"end\";\n        self.wheelDelta = 0;\n        conf.listener(event, self);\n      }, timeout);\n    }; // Attach events.\n\n\n    var _add = document.addEventListener ? \"addEventListener\" : \"attachEvent\";\n\n    var _remove = document.removeEventListener ? \"removeEventListener\" : \"detachEvent\";\n\n    var type = eventjs.getEventSupport(\"mousewheel\") ? \"mousewheel\" : \"DOMMouseScroll\";\n\n    conf.target[_add](type, onMouseWheel, false); // Return this object.\n\n\n    return self;\n  };\n\n  eventjs.Gesture = eventjs.Gesture || {};\n  eventjs.Gesture._gestureHandlers = eventjs.Gesture._gestureHandlers || {};\n  eventjs.Gesture._gestureHandlers.wheel = root.wheel;\n  return root;\n}(eventjs.proxy);\n/*\n\t\"Orientation Change\"\n\t----------------------------------------------------\n\thttps://developer.apple.com/library/safari/documentation/SafariDOMAdditions/Reference/DeviceOrientationEventClassRef/DeviceOrientationEvent/DeviceOrientationEvent.html#//apple_ref/doc/uid/TP40010526\n\t----------------------------------------------------\n\tEvent.add(window, \"deviceorientation\", function(event, self) {});\n*/\n\n\nif (typeof Event === \"undefined\") var Event = {};\nif (typeof Event.proxy === \"undefined\") Event.proxy = {};\n\nEvent.proxy = function (root) {\n  \"use strict\";\n\n  root.orientation = function (conf) {\n    // Externally accessible data.\n    var self = {\n      gesture: \"orientationchange\",\n      previous: null,\n\n      /* Report the previous orientation */\n      current: window.orientation,\n      target: conf.target,\n      listener: conf.listener,\n      remove: function remove() {\n        window.removeEventListener('orientationchange', onOrientationChange, false);\n      }\n    }; // Tracking the events.\n\n    var onOrientationChange = function onOrientationChange(e) {\n      self.previous = self.current;\n      self.current = window.orientation;\n\n      if (self.previous !== null && self.previous != self.current) {\n        conf.listener(e, self);\n        return;\n      }\n    }; // Attach events.\n\n\n    if (window.DeviceOrientationEvent) {\n      window.addEventListener(\"orientationchange\", onOrientationChange, false);\n    } // Return this object.\n\n\n    return self;\n  };\n\n  Event.Gesture = Event.Gesture || {};\n  Event.Gesture._gestureHandlers = Event.Gesture._gestureHandlers || {};\n  Event.Gesture._gestureHandlers.orientation = root.orientation;\n  return root;\n}(Event.proxy);\n\n(function () {\n  /**\n   * @private\n   * @param {String} eventName\n   * @param {Function} handler\n   */\n  function _removeEventListener(eventName, handler) {\n    if (!this.__eventListeners[eventName]) {\n      return;\n    }\n\n    var eventListener = this.__eventListeners[eventName];\n\n    if (handler) {\n      eventListener[eventListener.indexOf(handler)] = false;\n    } else {\n      fabric.util.array.fill(eventListener, false);\n    }\n  }\n  /**\n   * Observes specified event\n   * @deprecated `observe` deprecated since 0.8.34 (use `on` instead)\n   * @memberOf fabric.Observable\n   * @alias on\n   * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})\n   * @param {Function} handler Function that receives a notification when an event of the specified type occurs\n   * @return {Self} thisArg\n   * @chainable\n   */\n\n\n  function observe(eventName, handler) {\n    if (!this.__eventListeners) {\n      this.__eventListeners = {};\n    } // one object with key/value pairs was passed\n\n\n    if (arguments.length === 1) {\n      for (var prop in eventName) {\n        this.on(prop, eventName[prop]);\n      }\n    } else {\n      if (!this.__eventListeners[eventName]) {\n        this.__eventListeners[eventName] = [];\n      }\n\n      this.__eventListeners[eventName].push(handler);\n    }\n\n    return this;\n  }\n  /**\n   * Stops event observing for a particular event handler. Calling this method\n   * without arguments removes all handlers for all events\n   * @deprecated `stopObserving` deprecated since 0.8.34 (use `off` instead)\n   * @memberOf fabric.Observable\n   * @alias off\n   * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})\n   * @param {Function} handler Function to be deleted from EventListeners\n   * @return {Self} thisArg\n   * @chainable\n   */\n\n\n  function stopObserving(eventName, handler) {\n    if (!this.__eventListeners) {\n      return this;\n    } // remove all key/value pairs (event name -> event handler)\n\n\n    if (arguments.length === 0) {\n      for (eventName in this.__eventListeners) {\n        _removeEventListener.call(this, eventName);\n      }\n    } // one object with key/value pairs was passed\n    else if (arguments.length === 1 && _typeof(arguments[0]) === 'object') {\n      for (var prop in eventName) {\n        _removeEventListener.call(this, prop, eventName[prop]);\n      }\n    } else {\n      _removeEventListener.call(this, eventName, handler);\n    }\n\n    return this;\n  }\n  /**\n   * Fires event with an optional options object\n   * @deprecated `fire` deprecated since 1.0.7 (use `trigger` instead)\n   * @memberOf fabric.Observable\n   * @alias trigger\n   * @param {String} eventName Event name to fire\n   * @param {Object} [options] Options object\n   * @return {Self} thisArg\n   * @chainable\n   */\n\n\n  function fire(eventName, options) {\n    if (!this.__eventListeners) {\n      return this;\n    }\n\n    var listenersForEvent = this.__eventListeners[eventName];\n\n    if (!listenersForEvent) {\n      return this;\n    }\n\n    for (var i = 0, len = listenersForEvent.length; i < len; i++) {\n      listenersForEvent[i] && listenersForEvent[i].call(this, options || {});\n    }\n\n    this.__eventListeners[eventName] = listenersForEvent.filter(function (value) {\n      return value !== false;\n    });\n    return this;\n  }\n  /**\n   * @namespace fabric.Observable\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#events}\n   * @see {@link http://fabricjs.com/events|Events demo}\n   */\n\n\n  fabric.Observable = {\n    observe: observe,\n    stopObserving: stopObserving,\n    fire: fire,\n    on: observe,\n    off: stopObserving,\n    trigger: fire\n  };\n})();\n/**\n * @namespace fabric.Collection\n */\n\n\nfabric.Collection = {\n  _objects: [],\n\n  /**\n   * Adds objects to collection, Canvas or Group, then renders canvas\n   * (if `renderOnAddRemove` is not `false`).\n   * in case of Group no changes to bounding box are made.\n   * Objects should be instances of (or inherit from) fabric.Object\n   * Use of this function is highly discouraged for groups.\n   * you can add a bunch of objects with the add method but then you NEED\n   * to run a addWithUpdate call for the Group class or position/bbox will be wrong.\n   * @param {...fabric.Object} object Zero or more fabric instances\n   * @return {Self} thisArg\n   * @chainable\n   */\n  add: function add() {\n    this._objects.push.apply(this._objects, arguments);\n\n    if (this._onObjectAdded) {\n      for (var i = 0, length = arguments.length; i < length; i++) {\n        this._onObjectAdded(arguments[i]);\n      }\n    }\n\n    this.renderOnAddRemove && this.requestRenderAll();\n    return this;\n  },\n\n  /**\n   * Inserts an object into collection at specified index, then renders canvas (if `renderOnAddRemove` is not `false`)\n   * An object should be an instance of (or inherit from) fabric.Object\n   * Use of this function is highly discouraged for groups.\n   * you can add a bunch of objects with the insertAt method but then you NEED\n   * to run a addWithUpdate call for the Group class or position/bbox will be wrong.\n   * @param {Object} object Object to insert\n   * @param {Number} index Index to insert object at\n   * @param {Boolean} nonSplicing When `true`, no splicing (shifting) of objects occurs\n   * @return {Self} thisArg\n   * @chainable\n   */\n  insertAt: function insertAt(object, index, nonSplicing) {\n    var objects = this._objects;\n\n    if (nonSplicing) {\n      objects[index] = object;\n    } else {\n      objects.splice(index, 0, object);\n    }\n\n    this._onObjectAdded && this._onObjectAdded(object);\n    this.renderOnAddRemove && this.requestRenderAll();\n    return this;\n  },\n\n  /**\n   * Removes objects from a collection, then renders canvas (if `renderOnAddRemove` is not `false`)\n   * @param {...fabric.Object} object Zero or more fabric instances\n   * @return {Self} thisArg\n   * @chainable\n   */\n  remove: function remove() {\n    var objects = this._objects,\n        index,\n        somethingRemoved = false;\n\n    for (var i = 0, length = arguments.length; i < length; i++) {\n      index = objects.indexOf(arguments[i]); // only call onObjectRemoved if an object was actually removed\n\n      if (index !== -1) {\n        somethingRemoved = true;\n        objects.splice(index, 1);\n        this._onObjectRemoved && this._onObjectRemoved(arguments[i]);\n      }\n    }\n\n    this.renderOnAddRemove && somethingRemoved && this.requestRenderAll();\n    return this;\n  },\n\n  /**\n   * Executes given function for each object in this group\n   * @param {Function} callback\n   *                   Callback invoked with current object as first argument,\n   *                   index - as second and an array of all objects - as third.\n   *                   Callback is invoked in a context of Global Object (e.g. `window`)\n   *                   when no `context` argument is given\n   *\n   * @param {Object} context Context (aka thisObject)\n   * @return {Self} thisArg\n   * @chainable\n   */\n  forEachObject: function forEachObject(callback, context) {\n    var objects = this.getObjects();\n\n    for (var i = 0, len = objects.length; i < len; i++) {\n      callback.call(context, objects[i], i, objects);\n    }\n\n    return this;\n  },\n\n  /**\n   * Returns an array of children objects of this instance\n   * Type parameter introduced in 1.3.10\n   * since 2.3.5 this method return always a COPY of the array;\n   * @param {String} [type] When specified, only objects of this type are returned\n   * @return {Array}\n   */\n  getObjects: function getObjects(type) {\n    if (typeof type === 'undefined') {\n      return this._objects.concat();\n    }\n\n    return this._objects.filter(function (o) {\n      return o.type === type;\n    });\n  },\n\n  /**\n   * Returns object at specified index\n   * @param {Number} index\n   * @return {Self} thisArg\n   */\n  item: function item(index) {\n    return this._objects[index];\n  },\n\n  /**\n   * Returns true if collection contains no objects\n   * @return {Boolean} true if collection is empty\n   */\n  isEmpty: function isEmpty() {\n    return this._objects.length === 0;\n  },\n\n  /**\n   * Returns a size of a collection (i.e: length of an array containing its objects)\n   * @return {Number} Collection size\n   */\n  size: function size() {\n    return this._objects.length;\n  },\n\n  /**\n   * Returns true if collection contains an object\n   * @param {Object} object Object to check against\n   * @return {Boolean} `true` if collection contains an object\n   */\n  contains: function contains(object) {\n    return this._objects.indexOf(object) > -1;\n  },\n\n  /**\n   * Returns number representation of a collection complexity\n   * @return {Number} complexity\n   */\n  complexity: function complexity() {\n    return this._objects.reduce(function (memo, current) {\n      memo += current.complexity ? current.complexity() : 0;\n      return memo;\n    }, 0);\n  }\n};\n/**\n * @namespace fabric.CommonMethods\n */\n\nfabric.CommonMethods = {\n  /**\n   * Sets object's properties from options\n   * @param {Object} [options] Options object\n   */\n  _setOptions: function _setOptions(options) {\n    for (var prop in options) {\n      this.set(prop, options[prop]);\n    }\n  },\n\n  /**\n   * @private\n   * @param {Object} [filler] Options object\n   * @param {String} [property] property to set the Gradient to\n   */\n  _initGradient: function _initGradient(filler, property) {\n    if (filler && filler.colorStops && !(filler instanceof fabric.Gradient)) {\n      this.set(property, new fabric.Gradient(filler));\n    }\n  },\n\n  /**\n   * @private\n   * @param {Object} [filler] Options object\n   * @param {String} [property] property to set the Pattern to\n   * @param {Function} [callback] callback to invoke after pattern load\n   */\n  _initPattern: function _initPattern(filler, property, callback) {\n    if (filler && filler.source && !(filler instanceof fabric.Pattern)) {\n      this.set(property, new fabric.Pattern(filler, callback));\n    } else {\n      callback && callback();\n    }\n  },\n\n  /**\n   * @private\n   * @param {Object} [options] Options object\n   */\n  _initClipping: function _initClipping(options) {\n    if (!options.clipTo || typeof options.clipTo !== 'string') {\n      return;\n    }\n\n    var functionBody = fabric.util.getFunctionBody(options.clipTo);\n\n    if (typeof functionBody !== 'undefined') {\n      this.clipTo = new Function('ctx', functionBody);\n    }\n  },\n\n  /**\n   * @private\n   */\n  _setObject: function _setObject(obj) {\n    for (var prop in obj) {\n      this._set(prop, obj[prop]);\n    }\n  },\n\n  /**\n   * Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.\n   * @param {String|Object} key Property name or object (if object, iterate over the object properties)\n   * @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  set: function set(key, value) {\n    if (_typeof(key) === 'object') {\n      this._setObject(key);\n    } else {\n      if (typeof value === 'function' && key !== 'clipTo') {\n        this._set(key, value(this.get(key)));\n      } else {\n        this._set(key, value);\n      }\n    }\n\n    return this;\n  },\n  _set: function _set(key, value) {\n    this[key] = value;\n  },\n\n  /**\n   * Toggles specified property from `true` to `false` or from `false` to `true`\n   * @param {String} property Property to toggle\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  toggle: function toggle(property) {\n    var value = this.get(property);\n\n    if (typeof value === 'boolean') {\n      this.set(property, !value);\n    }\n\n    return this;\n  },\n\n  /**\n   * Basic getter\n   * @param {String} property Property name\n   * @return {*} value of a property\n   */\n  get: function get(property) {\n    return this[property];\n  }\n};\n\n(function (global) {\n  var sqrt = Math.sqrt,\n      atan2 = Math.atan2,\n      pow = Math.pow,\n      PiBy180 = Math.PI / 180,\n      PiBy2 = Math.PI / 2;\n  /**\n   * @namespace fabric.util\n   */\n\n  fabric.util = {\n    /**\n     * Calculate the cos of an angle, avoiding returning floats for known results\n     * @static\n     * @memberOf fabric.util\n     * @param {Number} angle the angle in radians or in degree\n     * @return {Number}\n     */\n    cos: function cos(angle) {\n      if (angle === 0) {\n        return 1;\n      }\n\n      if (angle < 0) {\n        // cos(a) = cos(-a)\n        angle = -angle;\n      }\n\n      var angleSlice = angle / PiBy2;\n\n      switch (angleSlice) {\n        case 1:\n        case 3:\n          return 0;\n\n        case 2:\n          return -1;\n      }\n\n      return Math.cos(angle);\n    },\n\n    /**\n     * Calculate the sin of an angle, avoiding returning floats for known results\n     * @static\n     * @memberOf fabric.util\n     * @param {Number} angle the angle in radians or in degree\n     * @return {Number}\n     */\n    sin: function sin(angle) {\n      if (angle === 0) {\n        return 0;\n      }\n\n      var angleSlice = angle / PiBy2,\n          sign = 1;\n\n      if (angle < 0) {\n        // sin(-a) = -sin(a)\n        sign = -1;\n      }\n\n      switch (angleSlice) {\n        case 1:\n          return sign;\n\n        case 2:\n          return 0;\n\n        case 3:\n          return -sign;\n      }\n\n      return Math.sin(angle);\n    },\n\n    /**\n     * Removes value from an array.\n     * Presence of value (and its position in an array) is determined via `Array.prototype.indexOf`\n     * @static\n     * @memberOf fabric.util\n     * @param {Array} array\n     * @param {*} value\n     * @return {Array} original array\n     */\n    removeFromArray: function removeFromArray(array, value) {\n      var idx = array.indexOf(value);\n\n      if (idx !== -1) {\n        array.splice(idx, 1);\n      }\n\n      return array;\n    },\n\n    /**\n     * Returns random number between 2 specified ones.\n     * @static\n     * @memberOf fabric.util\n     * @param {Number} min lower limit\n     * @param {Number} max upper limit\n     * @return {Number} random value (between min and max)\n     */\n    getRandomInt: function getRandomInt(min, max) {\n      return Math.floor(Math.random() * (max - min + 1)) + min;\n    },\n\n    /**\n     * Transforms degrees to radians.\n     * @static\n     * @memberOf fabric.util\n     * @param {Number} degrees value in degrees\n     * @return {Number} value in radians\n     */\n    degreesToRadians: function degreesToRadians(degrees) {\n      return degrees * PiBy180;\n    },\n\n    /**\n     * Transforms radians to degrees.\n     * @static\n     * @memberOf fabric.util\n     * @param {Number} radians value in radians\n     * @return {Number} value in degrees\n     */\n    radiansToDegrees: function radiansToDegrees(radians) {\n      return radians / PiBy180;\n    },\n\n    /**\n     * Rotates `point` around `origin` with `radians`\n     * @static\n     * @memberOf fabric.util\n     * @param {fabric.Point} point The point to rotate\n     * @param {fabric.Point} origin The origin of the rotation\n     * @param {Number} radians The radians of the angle for the rotation\n     * @return {fabric.Point} The new rotated point\n     */\n    rotatePoint: function rotatePoint(point, origin, radians) {\n      point.subtractEquals(origin);\n      var v = fabric.util.rotateVector(point, radians);\n      return new fabric.Point(v.x, v.y).addEquals(origin);\n    },\n\n    /**\n     * Rotates `vector` with `radians`\n     * @static\n     * @memberOf fabric.util\n     * @param {Object} vector The vector to rotate (x and y)\n     * @param {Number} radians The radians of the angle for the rotation\n     * @return {Object} The new rotated point\n     */\n    rotateVector: function rotateVector(vector, radians) {\n      var sin = fabric.util.sin(radians),\n          cos = fabric.util.cos(radians),\n          rx = vector.x * cos - vector.y * sin,\n          ry = vector.x * sin + vector.y * cos;\n      return {\n        x: rx,\n        y: ry\n      };\n    },\n\n    /**\n     * Apply transform t to point p\n     * @static\n     * @memberOf fabric.util\n     * @param  {fabric.Point} p The point to transform\n     * @param  {Array} t The transform\n     * @param  {Boolean} [ignoreOffset] Indicates that the offset should not be applied\n     * @return {fabric.Point} The transformed point\n     */\n    transformPoint: function transformPoint(p, t, ignoreOffset) {\n      if (ignoreOffset) {\n        return new fabric.Point(t[0] * p.x + t[2] * p.y, t[1] * p.x + t[3] * p.y);\n      }\n\n      return new fabric.Point(t[0] * p.x + t[2] * p.y + t[4], t[1] * p.x + t[3] * p.y + t[5]);\n    },\n\n    /**\n     * Returns coordinates of points's bounding rectangle (left, top, width, height)\n     * @param {Array} points 4 points array\n     * @param {Array} [transform] an array of 6 numbers representing a 2x3 transform matrix\n     * @return {Object} Object with left, top, width, height properties\n     */\n    makeBoundingBoxFromPoints: function makeBoundingBoxFromPoints(points, transform) {\n      if (transform) {\n        for (var i = 0; i < points.length; i++) {\n          points[i] = fabric.util.transformPoint(points[i], transform);\n        }\n      }\n\n      var xPoints = [points[0].x, points[1].x, points[2].x, points[3].x],\n          minX = fabric.util.array.min(xPoints),\n          maxX = fabric.util.array.max(xPoints),\n          width = maxX - minX,\n          yPoints = [points[0].y, points[1].y, points[2].y, points[3].y],\n          minY = fabric.util.array.min(yPoints),\n          maxY = fabric.util.array.max(yPoints),\n          height = maxY - minY;\n      return {\n        left: minX,\n        top: minY,\n        width: width,\n        height: height\n      };\n    },\n\n    /**\n     * Invert transformation t\n     * @static\n     * @memberOf fabric.util\n     * @param {Array} t The transform\n     * @return {Array} The inverted transform\n     */\n    invertTransform: function invertTransform(t) {\n      var a = 1 / (t[0] * t[3] - t[1] * t[2]),\n          r = [a * t[3], -a * t[1], -a * t[2], a * t[0]],\n          o = fabric.util.transformPoint({\n        x: t[4],\n        y: t[5]\n      }, r, true);\n      r[4] = -o.x;\n      r[5] = -o.y;\n      return r;\n    },\n\n    /**\n     * A wrapper around Number#toFixed, which contrary to native method returns number, not string.\n     * @static\n     * @memberOf fabric.util\n     * @param {Number|String} number number to operate on\n     * @param {Number} fractionDigits number of fraction digits to \"leave\"\n     * @return {Number}\n     */\n    toFixed: function toFixed(number, fractionDigits) {\n      return parseFloat(Number(number).toFixed(fractionDigits));\n    },\n\n    /**\n     * Converts from attribute value to pixel value if applicable.\n     * Returns converted pixels or original value not converted.\n     * @param {Number|String} value number to operate on\n     * @param {Number} fontSize\n     * @return {Number|String}\n     */\n    parseUnit: function parseUnit(value, fontSize) {\n      var unit = /\\D{0,2}$/.exec(value),\n          number = parseFloat(value);\n\n      if (!fontSize) {\n        fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE;\n      }\n\n      switch (unit[0]) {\n        case 'mm':\n          return number * fabric.DPI / 25.4;\n\n        case 'cm':\n          return number * fabric.DPI / 2.54;\n\n        case 'in':\n          return number * fabric.DPI;\n\n        case 'pt':\n          return number * fabric.DPI / 72;\n        // or * 4 / 3\n\n        case 'pc':\n          return number * fabric.DPI / 72 * 12;\n        // or * 16\n\n        case 'em':\n          return number * fontSize;\n\n        default:\n          return number;\n      }\n    },\n\n    /**\n     * Function which always returns `false`.\n     * @static\n     * @memberOf fabric.util\n     * @return {Boolean}\n     */\n    falseFunction: function falseFunction() {\n      return false;\n    },\n\n    /**\n     * Returns klass \"Class\" object of given namespace\n     * @memberOf fabric.util\n     * @param {String} type Type of object (eg. 'circle')\n     * @param {String} namespace Namespace to get klass \"Class\" object from\n     * @return {Object} klass \"Class\"\n     */\n    getKlass: function getKlass(type, namespace) {\n      // capitalize first letter only\n      type = fabric.util.string.camelize(type.charAt(0).toUpperCase() + type.slice(1));\n      return fabric.util.resolveNamespace(namespace)[type];\n    },\n\n    /**\n     * Returns array of attributes for given svg that fabric parses\n     * @memberOf fabric.util\n     * @param {String} type Type of svg element (eg. 'circle')\n     * @return {Array} string names of supported attributes\n     */\n    getSvgAttributes: function getSvgAttributes(type) {\n      var attributes = ['instantiated_by_use', 'style', 'id', 'class'];\n\n      switch (type) {\n        case 'linearGradient':\n          attributes = attributes.concat(['x1', 'y1', 'x2', 'y2', 'gradientUnits', 'gradientTransform']);\n          break;\n\n        case 'radialGradient':\n          attributes = attributes.concat(['gradientUnits', 'gradientTransform', 'cx', 'cy', 'r', 'fx', 'fy', 'fr']);\n          break;\n\n        case 'stop':\n          attributes = attributes.concat(['offset', 'stop-color', 'stop-opacity']);\n          break;\n      }\n\n      return attributes;\n    },\n\n    /**\n     * Returns object of given namespace\n     * @memberOf fabric.util\n     * @param {String} namespace Namespace string e.g. 'fabric.Image.filter' or 'fabric'\n     * @return {Object} Object for given namespace (default fabric)\n     */\n    resolveNamespace: function resolveNamespace(namespace) {\n      if (!namespace) {\n        return fabric;\n      }\n\n      var parts = namespace.split('.'),\n          len = parts.length,\n          i,\n          obj = global || fabric.window;\n\n      for (i = 0; i < len; ++i) {\n        obj = obj[parts[i]];\n      }\n\n      return obj;\n    },\n\n    /**\n     * Loads image element from given url and passes it to a callback\n     * @memberOf fabric.util\n     * @param {String} url URL representing an image\n     * @param {Function} callback Callback; invoked with loaded image\n     * @param {*} [context] Context to invoke callback in\n     * @param {Object} [crossOrigin] crossOrigin value to set image element to\n     */\n    loadImage: function loadImage(url, callback, context, crossOrigin) {\n      if (!url) {\n        callback && callback.call(context, url);\n        return;\n      }\n\n      var img = fabric.util.createImage();\n      /** @ignore */\n\n      var onLoadCallback = function onLoadCallback() {\n        callback && callback.call(context, img);\n        img = img.onload = img.onerror = null;\n      };\n\n      img.onload = onLoadCallback;\n      /** @ignore */\n\n      img.onerror = function () {\n        fabric.log('Error loading ' + img.src);\n        callback && callback.call(context, null, true);\n        img = img.onload = img.onerror = null;\n      }; // data-urls appear to be buggy with crossOrigin\n      // https://github.com/kangax/fabric.js/commit/d0abb90f1cd5c5ef9d2a94d3fb21a22330da3e0a#commitcomment-4513767\n      // see https://code.google.com/p/chromium/issues/detail?id=315152\n      //     https://bugzilla.mozilla.org/show_bug.cgi?id=935069\n\n\n      if (url.indexOf('data') !== 0 && crossOrigin) {\n        img.crossOrigin = crossOrigin; // Bust cache, otherwise Chrome will run into a crossorigin error\n\n        url = new URL(url);\n        url.searchParams.set(\"t\", Date.now());\n        url = url.toString();\n      } // IE10 / IE11-Fix: SVG contents from data: URI\n      // will only be available if the IMG is present\n      // in the DOM (and visible)\n\n\n      if (url.substring(0, 14) === 'data:image/svg') {\n        img.onload = null;\n        fabric.util.loadImageInDom(img, onLoadCallback);\n      }\n\n      img.src = url;\n    },\n\n    /**\n     * Attaches SVG image with data: URL to the dom\n     * @memberOf fabric.util\n     * @param {Object} img Image object with data:image/svg src\n     * @param {Function} callback Callback; invoked with loaded image\n     * @return {Object} DOM element (div containing the SVG image)\n     */\n    loadImageInDom: function loadImageInDom(img, onLoadCallback) {\n      var div = fabric.document.createElement('div');\n      div.style.width = div.style.height = '1px';\n      div.style.left = div.style.top = '-100%';\n      div.style.position = 'absolute';\n      div.appendChild(img);\n      fabric.document.querySelector('body').appendChild(div);\n      /**\n       * Wrap in function to:\n       *   1. Call existing callback\n       *   2. Cleanup DOM\n       */\n\n      img.onload = function () {\n        onLoadCallback();\n        div.parentNode.removeChild(div);\n        div = null;\n      };\n    },\n\n    /**\n     * Creates corresponding fabric instances from their object representations\n     * @static\n     * @memberOf fabric.util\n     * @param {Array} objects Objects to enliven\n     * @param {Function} callback Callback to invoke when all objects are created\n     * @param {String} namespace Namespace to get klass \"Class\" object from\n     * @param {Function} reviver Method for further parsing of object elements,\n     * called after each fabric object created.\n     */\n    enlivenObjects: function enlivenObjects(objects, callback, namespace, reviver) {\n      objects = objects || [];\n      var enlivenedObjects = [],\n          numLoadedObjects = 0,\n          numTotalObjects = objects.length;\n\n      function onLoaded() {\n        if (++numLoadedObjects === numTotalObjects) {\n          callback && callback(enlivenedObjects.filter(function (obj) {\n            // filter out undefined objects (objects that gave error)\n            return obj;\n          }));\n        }\n      }\n\n      if (!numTotalObjects) {\n        callback && callback(enlivenedObjects);\n        return;\n      }\n\n      objects.forEach(function (o, index) {\n        // if sparse array\n        if (!o || !o.type) {\n          onLoaded();\n          return;\n        }\n\n        var klass = fabric.util.getKlass(o.type, namespace);\n        klass.fromObject(o, function (obj, error) {\n          error || (enlivenedObjects[index] = obj);\n          reviver && reviver(o, obj, error);\n          onLoaded();\n        });\n      });\n    },\n\n    /**\n     * Create and wait for loading of patterns\n     * @static\n     * @memberOf fabric.util\n     * @param {Array} patterns Objects to enliven\n     * @param {Function} callback Callback to invoke when all objects are created\n     * called after each fabric object created.\n     */\n    enlivenPatterns: function enlivenPatterns(patterns, callback) {\n      patterns = patterns || [];\n\n      function onLoaded() {\n        if (++numLoadedPatterns === numPatterns) {\n          callback && callback(enlivenedPatterns);\n        }\n      }\n\n      var enlivenedPatterns = [],\n          numLoadedPatterns = 0,\n          numPatterns = patterns.length;\n\n      if (!numPatterns) {\n        callback && callback(enlivenedPatterns);\n        return;\n      }\n\n      patterns.forEach(function (p, index) {\n        if (p && p.source) {\n          new fabric.Pattern(p, function (pattern) {\n            enlivenedPatterns[index] = pattern;\n            onLoaded();\n          });\n        } else {\n          enlivenedPatterns[index] = p;\n          onLoaded();\n        }\n      });\n    },\n\n    /**\n     * Groups SVG elements (usually those retrieved from SVG document)\n     * @static\n     * @memberOf fabric.util\n     * @param {Array} elements SVG elements to group\n     * @param {Object} [options] Options object\n     * @param {String} path Value to set sourcePath to\n     * @return {fabric.Object|fabric.Group}\n     */\n    groupSVGElements: function groupSVGElements(elements, options, path) {\n      var object;\n\n      if (elements && elements.length === 1) {\n        return elements[0];\n      }\n\n      if (options) {\n        if (options.width && options.height) {\n          options.centerPoint = {\n            x: options.width / 2,\n            y: options.height / 2\n          };\n        } else {\n          delete options.width;\n          delete options.height;\n        }\n      }\n\n      object = new fabric.Group(elements, options);\n\n      if (typeof path !== 'undefined') {\n        object.sourcePath = path;\n      }\n\n      return object;\n    },\n\n    /**\n     * Populates an object with properties of another object\n     * @static\n     * @memberOf fabric.util\n     * @param {Object} source Source object\n     * @param {Object} destination Destination object\n     * @return {Array} properties Properties names to include\n     */\n    populateWithProperties: function populateWithProperties(source, destination, properties) {\n      if (properties && Object.prototype.toString.call(properties) === '[object Array]') {\n        for (var i = 0, len = properties.length; i < len; i++) {\n          if (properties[i] in source) {\n            destination[properties[i]] = source[properties[i]];\n          }\n        }\n      }\n    },\n\n    /**\n     * Draws a dashed line between two points\n     *\n     * This method is used to draw dashed line around selection area.\n     * See <a href=\"http://stackoverflow.com/questions/4576724/dotted-stroke-in-canvas\">dotted stroke in canvas</a>\n     *\n     * @param {CanvasRenderingContext2D} ctx context\n     * @param {Number} x  start x coordinate\n     * @param {Number} y start y coordinate\n     * @param {Number} x2 end x coordinate\n     * @param {Number} y2 end y coordinate\n     * @param {Array} da dash array pattern\n     */\n    drawDashedLine: function drawDashedLine(ctx, x, y, x2, y2, da) {\n      var dx = x2 - x,\n          dy = y2 - y,\n          len = sqrt(dx * dx + dy * dy),\n          rot = atan2(dy, dx),\n          dc = da.length,\n          di = 0,\n          draw = true;\n      ctx.save();\n      ctx.translate(x, y);\n      ctx.moveTo(0, 0);\n      ctx.rotate(rot);\n      x = 0;\n\n      while (len > x) {\n        x += da[di++ % dc];\n\n        if (x > len) {\n          x = len;\n        }\n\n        ctx[draw ? 'lineTo' : 'moveTo'](x, 0);\n        draw = !draw;\n      }\n\n      ctx.restore();\n    },\n\n    /**\n     * Creates canvas element\n     * @static\n     * @memberOf fabric.util\n     * @return {CanvasElement} initialized canvas element\n     */\n    createCanvasElement: function createCanvasElement() {\n      return fabric.document.createElement('canvas');\n    },\n\n    /**\n     * Creates a canvas element that is a copy of another and is also painted\n     * @param {CanvasElement} canvas to copy size and content of\n     * @static\n     * @memberOf fabric.util\n     * @return {CanvasElement} initialized canvas element\n     */\n    copyCanvasElement: function copyCanvasElement(canvas) {\n      var newCanvas = fabric.util.createCanvasElement();\n      newCanvas.width = canvas.width;\n      newCanvas.height = canvas.height;\n      newCanvas.getContext('2d').drawImage(canvas, 0, 0);\n      return newCanvas;\n    },\n\n    /**\n     * since 2.6.0 moved from canvas instance to utility.\n     * @param {CanvasElement} canvasEl to copy size and content of\n     * @param {String} format 'jpeg' or 'png', in some browsers 'webp' is ok too\n     * @param {Number} quality <= 1 and > 0\n     * @static\n     * @memberOf fabric.util\n     * @return {String} data url\n     */\n    toDataURL: function toDataURL(canvasEl, format, quality) {\n      return canvasEl.toDataURL('image/' + format, quality);\n    },\n\n    /**\n     * Creates image element (works on client and node)\n     * @static\n     * @memberOf fabric.util\n     * @return {HTMLImageElement} HTML image element\n     */\n    createImage: function createImage() {\n      return fabric.document.createElement('img');\n    },\n\n    /**\n     * @static\n     * @memberOf fabric.util\n     * @deprecated since 2.0.0\n     * @param {fabric.Object} receiver Object implementing `clipTo` method\n     * @param {CanvasRenderingContext2D} ctx Context to clip\n     */\n    clipContext: function clipContext(receiver, ctx) {\n      ctx.save();\n      ctx.beginPath();\n      receiver.clipTo(ctx);\n      ctx.clip();\n    },\n\n    /**\n     * Multiply matrix A by matrix B to nest transformations\n     * @static\n     * @memberOf fabric.util\n     * @param  {Array} a First transformMatrix\n     * @param  {Array} b Second transformMatrix\n     * @param  {Boolean} is2x2 flag to multiply matrices as 2x2 matrices\n     * @return {Array} The product of the two transform matrices\n     */\n    multiplyTransformMatrices: function multiplyTransformMatrices(a, b, is2x2) {\n      // Matrix multiply a * b\n      return [a[0] * b[0] + a[2] * b[1], a[1] * b[0] + a[3] * b[1], a[0] * b[2] + a[2] * b[3], a[1] * b[2] + a[3] * b[3], is2x2 ? 0 : a[0] * b[4] + a[2] * b[5] + a[4], is2x2 ? 0 : a[1] * b[4] + a[3] * b[5] + a[5]];\n    },\n\n    /**\n     * Decomposes standard 2x3 matrix into transform components\n     * @static\n     * @memberOf fabric.util\n     * @param  {Array} a transformMatrix\n     * @return {Object} Components of transform\n     */\n    qrDecompose: function qrDecompose(a) {\n      var angle = atan2(a[1], a[0]),\n          denom = pow(a[0], 2) + pow(a[1], 2),\n          scaleX = sqrt(denom),\n          scaleY = (a[0] * a[3] - a[2] * a[1]) / scaleX,\n          skewX = atan2(a[0] * a[2] + a[1] * a[3], denom);\n      return {\n        angle: angle / PiBy180,\n        scaleX: scaleX,\n        scaleY: scaleY,\n        skewX: skewX / PiBy180,\n        skewY: 0,\n        translateX: a[4],\n        translateY: a[5]\n      };\n    },\n\n    /**\n     * Returns a transform matrix starting from an object of the same kind of\n     * the one returned from qrDecompose, useful also if you want to calculate some\n     * transformations from an object that is not enlived yet\n     * @static\n     * @memberOf fabric.util\n     * @param  {Object} options\n     * @param  {Number} [options.angle] angle in degrees\n     * @return {Number[]} transform matrix\n     */\n    calcRotateMatrix: function calcRotateMatrix(options) {\n      if (!options.angle) {\n        return fabric.iMatrix.concat();\n      }\n\n      var theta = fabric.util.degreesToRadians(options.angle),\n          cos = fabric.util.cos(theta),\n          sin = fabric.util.sin(theta);\n      return [cos, sin, -sin, cos, 0, 0];\n    },\n\n    /**\n     * Returns a transform matrix starting from an object of the same kind of\n     * the one returned from qrDecompose, useful also if you want to calculate some\n     * transformations from an object that is not enlived yet.\n     * is called DimensionsTransformMatrix because those properties are the one that influence\n     * the size of the resulting box of the object.\n     * @static\n     * @memberOf fabric.util\n     * @param  {Object} options\n     * @param  {Number} [options.scaleX]\n     * @param  {Number} [options.scaleY]\n     * @param  {Boolean} [options.flipX]\n     * @param  {Boolean} [options.flipY]\n     * @param  {Number} [options.skewX]\n     * @param  {Number} [options.skewX]\n     * @return {Number[]} transform matrix\n     */\n    calcDimensionsMatrix: function calcDimensionsMatrix(options) {\n      var scaleX = typeof options.scaleX === 'undefined' ? 1 : options.scaleX,\n          scaleY = typeof options.scaleY === 'undefined' ? 1 : options.scaleY,\n          scaleMatrix = [options.flipX ? -scaleX : scaleX, 0, 0, options.flipY ? -scaleY : scaleY, 0, 0],\n          multiply = fabric.util.multiplyTransformMatrices,\n          degreesToRadians = fabric.util.degreesToRadians;\n\n      if (options.skewX) {\n        scaleMatrix = multiply(scaleMatrix, [1, 0, Math.tan(degreesToRadians(options.skewX)), 1], true);\n      }\n\n      if (options.skewY) {\n        scaleMatrix = multiply(scaleMatrix, [1, Math.tan(degreesToRadians(options.skewY)), 0, 1], true);\n      }\n\n      return scaleMatrix;\n    },\n\n    /**\n     * Returns a transform matrix starting from an object of the same kind of\n     * the one returned from qrDecompose, useful also if you want to calculate some\n     * transformations from an object that is not enlived yet\n     * @static\n     * @memberOf fabric.util\n     * @param  {Object} options\n     * @param  {Number} [options.angle]\n     * @param  {Number} [options.scaleX]\n     * @param  {Number} [options.scaleY]\n     * @param  {Boolean} [options.flipX]\n     * @param  {Boolean} [options.flipY]\n     * @param  {Number} [options.skewX]\n     * @param  {Number} [options.skewX]\n     * @param  {Number} [options.translateX]\n     * @param  {Number} [options.translateY]\n     * @return {Number[]} transform matrix\n     */\n    composeMatrix: function composeMatrix(options) {\n      var matrix = [1, 0, 0, 1, options.translateX || 0, options.translateY || 0],\n          multiply = fabric.util.multiplyTransformMatrices;\n\n      if (options.angle) {\n        matrix = multiply(matrix, fabric.util.calcRotateMatrix(options));\n      }\n\n      if (options.scaleX || options.scaleY || options.skewX || options.skewY || options.flipX || options.flipY) {\n        matrix = multiply(matrix, fabric.util.calcDimensionsMatrix(options));\n      }\n\n      return matrix;\n    },\n\n    /**\n     * Returns a transform matrix that has the same effect of scaleX, scaleY and skewX.\n     * Is deprecated for composeMatrix. Please do not use it.\n     * @static\n     * @deprecated since 3.4.0\n     * @memberOf fabric.util\n     * @param  {Number} scaleX\n     * @param  {Number} scaleY\n     * @param  {Number} skewX\n     * @return {Number[]} transform matrix\n     */\n    customTransformMatrix: function customTransformMatrix(scaleX, scaleY, skewX) {\n      return fabric.util.composeMatrix({\n        scaleX: scaleX,\n        scaleY: scaleY,\n        skewX: skewX\n      });\n    },\n\n    /**\n     * reset an object transform state to neutral. Top and left are not accounted for\n     * @static\n     * @memberOf fabric.util\n     * @param  {fabric.Object} target object to transform\n     */\n    resetObjectTransform: function resetObjectTransform(target) {\n      target.scaleX = 1;\n      target.scaleY = 1;\n      target.skewX = 0;\n      target.skewY = 0;\n      target.flipX = false;\n      target.flipY = false;\n      target.rotate(0);\n    },\n\n    /**\n     * Extract Object transform values\n     * @static\n     * @memberOf fabric.util\n     * @param  {fabric.Object} target object to read from\n     * @return {Object} Components of transform\n     */\n    saveObjectTransform: function saveObjectTransform(target) {\n      return {\n        scaleX: target.scaleX,\n        scaleY: target.scaleY,\n        skewX: target.skewX,\n        skewY: target.skewY,\n        angle: target.angle,\n        left: target.left,\n        flipX: target.flipX,\n        flipY: target.flipY,\n        top: target.top\n      };\n    },\n\n    /**\n     * Returns string representation of function body\n     * @param {Function} fn Function to get body of\n     * @return {String} Function body\n     */\n    getFunctionBody: function getFunctionBody(fn) {\n      return (String(fn).match(/function[^{]*\\{([\\s\\S]*)\\}/) || {})[1];\n    },\n\n    /**\n     * Returns true if context has transparent pixel\n     * at specified location (taking tolerance into account)\n     * @param {CanvasRenderingContext2D} ctx context\n     * @param {Number} x x coordinate\n     * @param {Number} y y coordinate\n     * @param {Number} tolerance Tolerance\n     */\n    isTransparent: function isTransparent(ctx, x, y, tolerance) {\n      // If tolerance is > 0 adjust start coords to take into account.\n      // If moves off Canvas fix to 0\n      if (tolerance > 0) {\n        if (x > tolerance) {\n          x -= tolerance;\n        } else {\n          x = 0;\n        }\n\n        if (y > tolerance) {\n          y -= tolerance;\n        } else {\n          y = 0;\n        }\n      }\n\n      var _isTransparent = true,\n          i,\n          temp,\n          imageData = ctx.getImageData(x, y, tolerance * 2 || 1, tolerance * 2 || 1),\n          l = imageData.data.length; // Split image data - for tolerance > 1, pixelDataSize = 4;\n\n      for (i = 3; i < l; i += 4) {\n        temp = imageData.data[i];\n        _isTransparent = temp <= 0;\n\n        if (_isTransparent === false) {\n          break; // Stop if colour found\n        }\n      }\n\n      imageData = null;\n      return _isTransparent;\n    },\n\n    /**\n     * Parse preserveAspectRatio attribute from element\n     * @param {string} attribute to be parsed\n     * @return {Object} an object containing align and meetOrSlice attribute\n     */\n    parsePreserveAspectRatioAttribute: function parsePreserveAspectRatioAttribute(attribute) {\n      var meetOrSlice = 'meet',\n          alignX = 'Mid',\n          alignY = 'Mid',\n          aspectRatioAttrs = attribute.split(' '),\n          align;\n\n      if (aspectRatioAttrs && aspectRatioAttrs.length) {\n        meetOrSlice = aspectRatioAttrs.pop();\n\n        if (meetOrSlice !== 'meet' && meetOrSlice !== 'slice') {\n          align = meetOrSlice;\n          meetOrSlice = 'meet';\n        } else if (aspectRatioAttrs.length) {\n          align = aspectRatioAttrs.pop();\n        }\n      } //divide align in alignX and alignY\n\n\n      alignX = align !== 'none' ? align.slice(1, 4) : 'none';\n      alignY = align !== 'none' ? align.slice(5, 8) : 'none';\n      return {\n        meetOrSlice: meetOrSlice,\n        alignX: alignX,\n        alignY: alignY\n      };\n    },\n\n    /**\n     * Clear char widths cache for the given font family or all the cache if no\n     * fontFamily is specified.\n     * Use it if you know you are loading fonts in a lazy way and you are not waiting\n     * for custom fonts to load properly when adding text objects to the canvas.\n     * If a text object is added when its own font is not loaded yet, you will get wrong\n     * measurement and so wrong bounding boxes.\n     * After the font cache is cleared, either change the textObject text content or call\n     * initDimensions() to trigger a recalculation\n     * @memberOf fabric.util\n     * @param {String} [fontFamily] font family to clear\n     */\n    clearFabricFontCache: function clearFabricFontCache(fontFamily) {\n      fontFamily = (fontFamily || '').toLowerCase();\n\n      if (!fontFamily) {\n        fabric.charWidthsCache = {};\n      } else if (fabric.charWidthsCache[fontFamily]) {\n        delete fabric.charWidthsCache[fontFamily];\n      }\n    },\n\n    /**\n     * Given current aspect ratio, determines the max width and height that can\n     * respect the total allowed area for the cache.\n     * @memberOf fabric.util\n     * @param {Number} ar aspect ratio\n     * @param {Number} maximumArea Maximum area you want to achieve\n     * @return {Object.x} Limited dimensions by X\n     * @return {Object.y} Limited dimensions by Y\n     */\n    limitDimsByArea: function limitDimsByArea(ar, maximumArea) {\n      var roughWidth = Math.sqrt(maximumArea * ar),\n          perfLimitSizeY = Math.floor(maximumArea / roughWidth);\n      return {\n        x: Math.floor(roughWidth),\n        y: perfLimitSizeY\n      };\n    },\n    capValue: function capValue(min, value, max) {\n      return Math.max(min, Math.min(value, max));\n    },\n\n    /**\n     * Finds the scale for the object source to fit inside the object destination,\n     * keeping aspect ratio intact.\n     * respect the total allowed area for the cache.\n     * @memberOf fabric.util\n     * @param {Object | fabric.Object} source\n     * @param {Number} source.height natural unscaled height of the object\n     * @param {Number} source.width natural unscaled width of the object\n     * @param {Object | fabric.Object} destination\n     * @param {Number} destination.height natural unscaled height of the object\n     * @param {Number} destination.width natural unscaled width of the object\n     * @return {Number} scale factor to apply to source to fit into destination\n     */\n    findScaleToFit: function findScaleToFit(source, destination) {\n      return Math.min(destination.width / source.width, destination.height / source.height);\n    },\n\n    /**\n     * Finds the scale for the object source to cover entirely the object destination,\n     * keeping aspect ratio intact.\n     * respect the total allowed area for the cache.\n     * @memberOf fabric.util\n     * @param {Object | fabric.Object} source\n     * @param {Number} source.height natural unscaled height of the object\n     * @param {Number} source.width natural unscaled width of the object\n     * @param {Object | fabric.Object} destination\n     * @param {Number} destination.height natural unscaled height of the object\n     * @param {Number} destination.width natural unscaled width of the object\n     * @return {Number} scale factor to apply to source to cover destination\n     */\n    findScaleToCover: function findScaleToCover(source, destination) {\n      return Math.max(destination.width / source.width, destination.height / source.height);\n    },\n\n    /**\n     * given an array of 6 number returns something like `\"matrix(...numbers)\"`\n     * @memberOf fabric.util\n     * @param {Array} trasnform an array with 6 numbers\n     * @return {String} transform matrix for svg\n     * @return {Object.y} Limited dimensions by Y\n     */\n    matrixToSVG: function matrixToSVG(transform) {\n      return 'matrix(' + transform.map(function (value) {\n        return fabric.util.toFixed(value, fabric.Object.NUM_FRACTION_DIGITS);\n      }).join(' ') + ')';\n    }\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function () {\n  var _join = Array.prototype.join;\n  /* Adapted from http://dxr.mozilla.org/mozilla-central/source/content/svg/content/src/nsSVGPathDataParser.cpp\n   * by Andrea Bogazzi code is under MPL. if you don't have a copy of the license you can take it here\n   * http://mozilla.org/MPL/2.0/\n   */\n\n  function arcToSegments(toX, toY, rx, ry, large, sweep, rotateX) {\n    var argsString = _join.call(arguments);\n\n    if (fabric.arcToSegmentsCache[argsString]) {\n      return fabric.arcToSegmentsCache[argsString];\n    }\n\n    var PI = Math.PI,\n        th = rotateX * PI / 180,\n        sinTh = fabric.util.sin(th),\n        cosTh = fabric.util.cos(th),\n        fromX = 0,\n        fromY = 0;\n    rx = Math.abs(rx);\n    ry = Math.abs(ry);\n    var px = -cosTh * toX * 0.5 - sinTh * toY * 0.5,\n        py = -cosTh * toY * 0.5 + sinTh * toX * 0.5,\n        rx2 = rx * rx,\n        ry2 = ry * ry,\n        py2 = py * py,\n        px2 = px * px,\n        pl = rx2 * ry2 - rx2 * py2 - ry2 * px2,\n        root = 0;\n\n    if (pl < 0) {\n      var s = Math.sqrt(1 - pl / (rx2 * ry2));\n      rx *= s;\n      ry *= s;\n    } else {\n      root = (large === sweep ? -1.0 : 1.0) * Math.sqrt(pl / (rx2 * py2 + ry2 * px2));\n    }\n\n    var cx = root * rx * py / ry,\n        cy = -root * ry * px / rx,\n        cx1 = cosTh * cx - sinTh * cy + toX * 0.5,\n        cy1 = sinTh * cx + cosTh * cy + toY * 0.5,\n        mTheta = calcVectorAngle(1, 0, (px - cx) / rx, (py - cy) / ry),\n        dtheta = calcVectorAngle((px - cx) / rx, (py - cy) / ry, (-px - cx) / rx, (-py - cy) / ry);\n\n    if (sweep === 0 && dtheta > 0) {\n      dtheta -= 2 * PI;\n    } else if (sweep === 1 && dtheta < 0) {\n      dtheta += 2 * PI;\n    } // Convert into cubic bezier segments <= 90deg\n\n\n    var segments = Math.ceil(Math.abs(dtheta / PI * 2)),\n        result = [],\n        mDelta = dtheta / segments,\n        mT = 8 / 3 * Math.sin(mDelta / 4) * Math.sin(mDelta / 4) / Math.sin(mDelta / 2),\n        th3 = mTheta + mDelta;\n\n    for (var i = 0; i < segments; i++) {\n      result[i] = segmentToBezier(mTheta, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY);\n      fromX = result[i][4];\n      fromY = result[i][5];\n      mTheta = th3;\n      th3 += mDelta;\n    }\n\n    fabric.arcToSegmentsCache[argsString] = result;\n    return result;\n  }\n\n  function segmentToBezier(th2, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY) {\n    var costh2 = fabric.util.cos(th2),\n        sinth2 = fabric.util.sin(th2),\n        costh3 = fabric.util.cos(th3),\n        sinth3 = fabric.util.sin(th3),\n        toX = cosTh * rx * costh3 - sinTh * ry * sinth3 + cx1,\n        toY = sinTh * rx * costh3 + cosTh * ry * sinth3 + cy1,\n        cp1X = fromX + mT * (-cosTh * rx * sinth2 - sinTh * ry * costh2),\n        cp1Y = fromY + mT * (-sinTh * rx * sinth2 + cosTh * ry * costh2),\n        cp2X = toX + mT * (cosTh * rx * sinth3 + sinTh * ry * costh3),\n        cp2Y = toY + mT * (sinTh * rx * sinth3 - cosTh * ry * costh3);\n    return [cp1X, cp1Y, cp2X, cp2Y, toX, toY];\n  }\n  /*\n   * Private\n   */\n\n\n  function calcVectorAngle(ux, uy, vx, vy) {\n    var ta = Math.atan2(uy, ux),\n        tb = Math.atan2(vy, vx);\n\n    if (tb >= ta) {\n      return tb - ta;\n    } else {\n      return 2 * Math.PI - (ta - tb);\n    }\n  }\n  /**\n   * Draws arc\n   * @param {CanvasRenderingContext2D} ctx\n   * @param {Number} fx\n   * @param {Number} fy\n   * @param {Array} coords\n   */\n\n\n  fabric.util.drawArc = function (ctx, fx, fy, coords) {\n    var rx = coords[0],\n        ry = coords[1],\n        rot = coords[2],\n        large = coords[3],\n        sweep = coords[4],\n        tx = coords[5],\n        ty = coords[6],\n        segs = [[], [], [], []],\n        segsNorm = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot);\n\n    for (var i = 0, len = segsNorm.length; i < len; i++) {\n      segs[i][0] = segsNorm[i][0] + fx;\n      segs[i][1] = segsNorm[i][1] + fy;\n      segs[i][2] = segsNorm[i][2] + fx;\n      segs[i][3] = segsNorm[i][3] + fy;\n      segs[i][4] = segsNorm[i][4] + fx;\n      segs[i][5] = segsNorm[i][5] + fy;\n      ctx.bezierCurveTo.apply(ctx, segs[i]);\n    }\n  };\n  /**\n   * Calculate bounding box of a elliptic-arc\n   * @param {Number} fx start point of arc\n   * @param {Number} fy\n   * @param {Number} rx horizontal radius\n   * @param {Number} ry vertical radius\n   * @param {Number} rot angle of horizontal axe\n   * @param {Number} large 1 or 0, whatever the arc is the big or the small on the 2 points\n   * @param {Number} sweep 1 or 0, 1 clockwise or counterclockwise direction\n   * @param {Number} tx end point of arc\n   * @param {Number} ty\n   */\n\n\n  fabric.util.getBoundsOfArc = function (fx, fy, rx, ry, rot, large, sweep, tx, ty) {\n    var fromX = 0,\n        fromY = 0,\n        bound,\n        bounds = [],\n        segs = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot);\n\n    for (var i = 0, len = segs.length; i < len; i++) {\n      bound = getBoundsOfCurve(fromX, fromY, segs[i][0], segs[i][1], segs[i][2], segs[i][3], segs[i][4], segs[i][5]);\n      bounds.push({\n        x: bound[0].x + fx,\n        y: bound[0].y + fy\n      });\n      bounds.push({\n        x: bound[1].x + fx,\n        y: bound[1].y + fy\n      });\n      fromX = segs[i][4];\n      fromY = segs[i][5];\n    }\n\n    return bounds;\n  };\n  /**\n   * Calculate bounding box of a beziercurve\n   * @param {Number} x0 starting point\n   * @param {Number} y0\n   * @param {Number} x1 first control point\n   * @param {Number} y1\n   * @param {Number} x2 secondo control point\n   * @param {Number} y2\n   * @param {Number} x3 end of beizer\n   * @param {Number} y3\n   */\n  // taken from http://jsbin.com/ivomiq/56/edit  no credits available for that.\n\n\n  function getBoundsOfCurve(x0, y0, x1, y1, x2, y2, x3, y3) {\n    var argsString;\n\n    if (fabric.cachesBoundsOfCurve) {\n      argsString = _join.call(arguments);\n\n      if (fabric.boundsOfCurveCache[argsString]) {\n        return fabric.boundsOfCurveCache[argsString];\n      }\n    }\n\n    var sqrt = Math.sqrt,\n        min = Math.min,\n        max = Math.max,\n        abs = Math.abs,\n        tvalues = [],\n        bounds = [[], []],\n        a,\n        b,\n        c,\n        t,\n        t1,\n        t2,\n        b2ac,\n        sqrtb2ac;\n    b = 6 * x0 - 12 * x1 + 6 * x2;\n    a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;\n    c = 3 * x1 - 3 * x0;\n\n    for (var i = 0; i < 2; ++i) {\n      if (i > 0) {\n        b = 6 * y0 - 12 * y1 + 6 * y2;\n        a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;\n        c = 3 * y1 - 3 * y0;\n      }\n\n      if (abs(a) < 1e-12) {\n        if (abs(b) < 1e-12) {\n          continue;\n        }\n\n        t = -c / b;\n\n        if (0 < t && t < 1) {\n          tvalues.push(t);\n        }\n\n        continue;\n      }\n\n      b2ac = b * b - 4 * c * a;\n\n      if (b2ac < 0) {\n        continue;\n      }\n\n      sqrtb2ac = sqrt(b2ac);\n      t1 = (-b + sqrtb2ac) / (2 * a);\n\n      if (0 < t1 && t1 < 1) {\n        tvalues.push(t1);\n      }\n\n      t2 = (-b - sqrtb2ac) / (2 * a);\n\n      if (0 < t2 && t2 < 1) {\n        tvalues.push(t2);\n      }\n    }\n\n    var x,\n        y,\n        j = tvalues.length,\n        jlen = j,\n        mt;\n\n    while (j--) {\n      t = tvalues[j];\n      mt = 1 - t;\n      x = mt * mt * mt * x0 + 3 * mt * mt * t * x1 + 3 * mt * t * t * x2 + t * t * t * x3;\n      bounds[0][j] = x;\n      y = mt * mt * mt * y0 + 3 * mt * mt * t * y1 + 3 * mt * t * t * y2 + t * t * t * y3;\n      bounds[1][j] = y;\n    }\n\n    bounds[0][jlen] = x0;\n    bounds[1][jlen] = y0;\n    bounds[0][jlen + 1] = x3;\n    bounds[1][jlen + 1] = y3;\n    var result = [{\n      x: min.apply(null, bounds[0]),\n      y: min.apply(null, bounds[1])\n    }, {\n      x: max.apply(null, bounds[0]),\n      y: max.apply(null, bounds[1])\n    }];\n\n    if (fabric.cachesBoundsOfCurve) {\n      fabric.boundsOfCurveCache[argsString] = result;\n    }\n\n    return result;\n  }\n\n  fabric.util.getBoundsOfCurve = getBoundsOfCurve;\n})();\n\n(function () {\n  var slice = Array.prototype.slice;\n  /**\n   * Invokes method on all items in a given array\n   * @memberOf fabric.util.array\n   * @param {Array} array Array to iterate over\n   * @param {String} method Name of a method to invoke\n   * @return {Array}\n   */\n\n  function invoke(array, method) {\n    var args = slice.call(arguments, 2),\n        result = [];\n\n    for (var i = 0, len = array.length; i < len; i++) {\n      result[i] = args.length ? array[i][method].apply(array[i], args) : array[i][method].call(array[i]);\n    }\n\n    return result;\n  }\n  /**\n   * Finds maximum value in array (not necessarily \"first\" one)\n   * @memberOf fabric.util.array\n   * @param {Array} array Array to iterate over\n   * @param {String} byProperty\n   * @return {*}\n   */\n\n\n  function max(array, byProperty) {\n    return find(array, byProperty, function (value1, value2) {\n      return value1 >= value2;\n    });\n  }\n  /**\n   * Finds minimum value in array (not necessarily \"first\" one)\n   * @memberOf fabric.util.array\n   * @param {Array} array Array to iterate over\n   * @param {String} byProperty\n   * @return {*}\n   */\n\n\n  function min(array, byProperty) {\n    return find(array, byProperty, function (value1, value2) {\n      return value1 < value2;\n    });\n  }\n  /**\n   * @private\n   */\n\n\n  function fill(array, value) {\n    var k = array.length;\n\n    while (k--) {\n      array[k] = value;\n    }\n\n    return array;\n  }\n  /**\n   * @private\n   */\n\n\n  function find(array, byProperty, condition) {\n    if (!array || array.length === 0) {\n      return;\n    }\n\n    var i = array.length - 1,\n        result = byProperty ? array[i][byProperty] : array[i];\n\n    if (byProperty) {\n      while (i--) {\n        if (condition(array[i][byProperty], result)) {\n          result = array[i][byProperty];\n        }\n      }\n    } else {\n      while (i--) {\n        if (condition(array[i], result)) {\n          result = array[i];\n        }\n      }\n    }\n\n    return result;\n  }\n  /**\n   * @namespace fabric.util.array\n   */\n\n\n  fabric.util.array = {\n    fill: fill,\n    invoke: invoke,\n    min: min,\n    max: max\n  };\n})();\n\n(function () {\n  /**\n   * Copies all enumerable properties of one js object to another\n   * this does not and cannot compete with generic utils.\n   * Does not clone or extend fabric.Object subclasses.\n   * This is mostly for internal use and has extra handling for fabricJS objects\n   * it skips the canvas property in deep cloning.\n   * @memberOf fabric.util.object\n   * @param {Object} destination Where to copy to\n   * @param {Object} source Where to copy from\n   * @return {Object}\n   */\n  function extend(destination, source, deep) {\n    // JScript DontEnum bug is not taken care of\n    // the deep clone is for internal use, is not meant to avoid\n    // javascript traps or cloning html element or self referenced objects.\n    if (deep) {\n      if (!fabric.isLikelyNode && source instanceof Element) {\n        // avoid cloning deep images, canvases,\n        destination = source;\n      } else if (source instanceof Array) {\n        destination = [];\n\n        for (var i = 0, len = source.length; i < len; i++) {\n          destination[i] = extend({}, source[i], deep);\n        }\n      } else if (source && _typeof(source) === 'object') {\n        for (var property in source) {\n          if (property === 'canvas') {\n            destination[property] = extend({}, source[property]);\n          } else if (source.hasOwnProperty(property)) {\n            destination[property] = extend({}, source[property], deep);\n          }\n        }\n      } else {\n        // this sounds odd for an extend but is ok for recursive use\n        destination = source;\n      }\n    } else {\n      for (var property in source) {\n        destination[property] = source[property];\n      }\n    }\n\n    return destination;\n  }\n  /**\n   * Creates an empty object and copies all enumerable properties of another object to it\n   * @memberOf fabric.util.object\n   * TODO: this function return an empty object if you try to clone null\n   * @param {Object} object Object to clone\n   * @return {Object}\n   */\n\n\n  function clone(object, deep) {\n    return extend({}, object, deep);\n  }\n  /** @namespace fabric.util.object */\n\n\n  fabric.util.object = {\n    extend: extend,\n    clone: clone\n  };\n  fabric.util.object.extend(fabric.util, fabric.Observable);\n})();\n\n(function () {\n  /**\n   * Camelizes a string\n   * @memberOf fabric.util.string\n   * @param {String} string String to camelize\n   * @return {String} Camelized version of a string\n   */\n  function camelize(string) {\n    return string.replace(/-+(.)?/g, function (match, character) {\n      return character ? character.toUpperCase() : '';\n    });\n  }\n  /**\n   * Capitalizes a string\n   * @memberOf fabric.util.string\n   * @param {String} string String to capitalize\n   * @param {Boolean} [firstLetterOnly] If true only first letter is capitalized\n   * and other letters stay untouched, if false first letter is capitalized\n   * and other letters are converted to lowercase.\n   * @return {String} Capitalized version of a string\n   */\n\n\n  function capitalize(string, firstLetterOnly) {\n    return string.charAt(0).toUpperCase() + (firstLetterOnly ? string.slice(1) : string.slice(1).toLowerCase());\n  }\n  /**\n   * Escapes XML in a string\n   * @memberOf fabric.util.string\n   * @param {String} string String to escape\n   * @return {String} Escaped version of a string\n   */\n\n\n  function escapeXml(string) {\n    return string.replace(/&/g, '&amp;').replace(/\"/g, '&quot;').replace(/'/g, '&apos;').replace(/</g, '&lt;').replace(/>/g, '&gt;');\n  }\n  /**\n   * Divide a string in the user perceived single units\n   * @memberOf fabric.util.string\n   * @param {String} textstring String to escape\n   * @return {Array} array containing the graphemes\n   */\n\n\n  function graphemeSplit(textstring) {\n    var i = 0,\n        chr,\n        graphemes = [];\n\n    for (i = 0, chr; i < textstring.length; i++) {\n      if ((chr = getWholeChar(textstring, i)) === false) {\n        continue;\n      }\n\n      graphemes.push(chr);\n    }\n\n    return graphemes;\n  } // taken from mdn in the charAt doc page.\n\n\n  function getWholeChar(str, i) {\n    var code = str.charCodeAt(i);\n\n    if (isNaN(code)) {\n      return ''; // Position not found\n    }\n\n    if (code < 0xD800 || code > 0xDFFF) {\n      return str.charAt(i);\n    } // High surrogate (could change last hex to 0xDB7F to treat high private\n    // surrogates as single characters)\n\n\n    if (0xD800 <= code && code <= 0xDBFF) {\n      if (str.length <= i + 1) {\n        throw 'High surrogate without following low surrogate';\n      }\n\n      var next = str.charCodeAt(i + 1);\n\n      if (0xDC00 > next || next > 0xDFFF) {\n        throw 'High surrogate without following low surrogate';\n      }\n\n      return str.charAt(i) + str.charAt(i + 1);\n    } // Low surrogate (0xDC00 <= code && code <= 0xDFFF)\n\n\n    if (i === 0) {\n      throw 'Low surrogate without preceding high surrogate';\n    }\n\n    var prev = str.charCodeAt(i - 1); // (could change last hex to 0xDB7F to treat high private\n    // surrogates as single characters)\n\n    if (0xD800 > prev || prev > 0xDBFF) {\n      throw 'Low surrogate without preceding high surrogate';\n    } // We can pass over low surrogates now as the second component\n    // in a pair which we have already processed\n\n\n    return false;\n  }\n  /**\n   * String utilities\n   * @namespace fabric.util.string\n   */\n\n\n  fabric.util.string = {\n    camelize: camelize,\n    capitalize: capitalize,\n    escapeXml: escapeXml,\n    graphemeSplit: graphemeSplit\n  };\n})();\n\n(function () {\n  var slice = Array.prototype.slice,\n      emptyFunction = function emptyFunction() {},\n      IS_DONTENUM_BUGGY = function () {\n    for (var p in {\n      toString: 1\n    }) {\n      if (p === 'toString') {\n        return false;\n      }\n    }\n\n    return true;\n  }(),\n\n  /** @ignore */\n  addMethods = function addMethods(klass, source, parent) {\n    for (var property in source) {\n      if (property in klass.prototype && typeof klass.prototype[property] === 'function' && (source[property] + '').indexOf('callSuper') > -1) {\n        klass.prototype[property] = function (property) {\n          return function () {\n            var superclass = this.constructor.superclass;\n            this.constructor.superclass = parent;\n            var returnValue = source[property].apply(this, arguments);\n            this.constructor.superclass = superclass;\n\n            if (property !== 'initialize') {\n              return returnValue;\n            }\n          };\n        }(property);\n      } else {\n        klass.prototype[property] = source[property];\n      }\n\n      if (IS_DONTENUM_BUGGY) {\n        if (source.toString !== Object.prototype.toString) {\n          klass.prototype.toString = source.toString;\n        }\n\n        if (source.valueOf !== Object.prototype.valueOf) {\n          klass.prototype.valueOf = source.valueOf;\n        }\n      }\n    }\n  };\n\n  function Subclass() {}\n\n  function callSuper(methodName) {\n    var parentMethod = null,\n        _this = this; // climb prototype chain to find method not equal to callee's method\n\n\n    while (_this.constructor.superclass) {\n      var superClassMethod = _this.constructor.superclass.prototype[methodName];\n\n      if (_this[methodName] !== superClassMethod) {\n        parentMethod = superClassMethod;\n        break;\n      } // eslint-disable-next-line\n\n\n      _this = _this.constructor.superclass.prototype;\n    }\n\n    if (!parentMethod) {\n      return console.log('tried to callSuper ' + methodName + ', method not found in prototype chain', this);\n    }\n\n    return arguments.length > 1 ? parentMethod.apply(this, slice.call(arguments, 1)) : parentMethod.call(this);\n  }\n  /**\n   * Helper for creation of \"classes\".\n   * @memberOf fabric.util\n   * @param {Function} [parent] optional \"Class\" to inherit from\n   * @param {Object} [properties] Properties shared by all instances of this class\n   *                  (be careful modifying objects defined here as this would affect all instances)\n   */\n\n\n  function createClass() {\n    var parent = null,\n        properties = slice.call(arguments, 0);\n\n    if (typeof properties[0] === 'function') {\n      parent = properties.shift();\n    }\n\n    function klass() {\n      this.initialize.apply(this, arguments);\n    }\n\n    klass.superclass = parent;\n    klass.subclasses = [];\n\n    if (parent) {\n      Subclass.prototype = parent.prototype;\n      klass.prototype = new Subclass();\n      parent.subclasses.push(klass);\n    }\n\n    for (var i = 0, length = properties.length; i < length; i++) {\n      addMethods(klass, properties[i], parent);\n    }\n\n    if (!klass.prototype.initialize) {\n      klass.prototype.initialize = emptyFunction;\n    }\n\n    klass.prototype.constructor = klass;\n    klass.prototype.callSuper = callSuper;\n    return klass;\n  }\n\n  fabric.util.createClass = createClass;\n})();\n\n(function () {\n  // since ie10 or ie9 can use addEventListener but they do not support options, i need to check\n  var couldUseAttachEvent = !!fabric.document.createElement('div').attachEvent;\n  /**\n   * Adds an event listener to an element\n   * @function\n   * @memberOf fabric.util\n   * @param {HTMLElement} element\n   * @param {String} eventName\n   * @param {Function} handler\n   */\n\n  fabric.util.addListener = function (element, eventName, handler, options) {\n    element && element.addEventListener(eventName, handler, couldUseAttachEvent ? false : options);\n  };\n  /**\n   * Removes an event listener from an element\n   * @function\n   * @memberOf fabric.util\n   * @param {HTMLElement} element\n   * @param {String} eventName\n   * @param {Function} handler\n   */\n\n\n  fabric.util.removeListener = function (element, eventName, handler, options) {\n    element && element.removeEventListener(eventName, handler, couldUseAttachEvent ? false : options);\n  };\n\n  function getTouchInfo(event) {\n    var touchProp = event.changedTouches;\n\n    if (touchProp && touchProp[0]) {\n      return touchProp[0];\n    }\n\n    return event;\n  }\n\n  fabric.util.getPointer = function (event) {\n    var element = event.target,\n        scroll = fabric.util.getScrollLeftTop(element),\n        _evt = getTouchInfo(event);\n\n    return {\n      x: _evt.clientX + scroll.left,\n      y: _evt.clientY + scroll.top\n    };\n  };\n})();\n\n(function () {\n  /**\n   * Cross-browser wrapper for setting element's style\n   * @memberOf fabric.util\n   * @param {HTMLElement} element\n   * @param {Object} styles\n   * @return {HTMLElement} Element that was passed as a first argument\n   */\n  function setStyle(element, styles) {\n    var elementStyle = element.style;\n\n    if (!elementStyle) {\n      return element;\n    }\n\n    if (typeof styles === 'string') {\n      element.style.cssText += ';' + styles;\n      return styles.indexOf('opacity') > -1 ? setOpacity(element, styles.match(/opacity:\\s*(\\d?\\.?\\d*)/)[1]) : element;\n    }\n\n    for (var property in styles) {\n      if (property === 'opacity') {\n        setOpacity(element, styles[property]);\n      } else {\n        var normalizedProperty = property === 'float' || property === 'cssFloat' ? typeof elementStyle.styleFloat === 'undefined' ? 'cssFloat' : 'styleFloat' : property;\n        elementStyle[normalizedProperty] = styles[property];\n      }\n    }\n\n    return element;\n  }\n\n  var parseEl = fabric.document.createElement('div'),\n      supportsOpacity = typeof parseEl.style.opacity === 'string',\n      supportsFilters = typeof parseEl.style.filter === 'string',\n      reOpacity = /alpha\\s*\\(\\s*opacity\\s*=\\s*([^\\)]+)\\)/,\n\n  /** @ignore */\n  setOpacity = function setOpacity(element) {\n    return element;\n  };\n\n  if (supportsOpacity) {\n    /** @ignore */\n    setOpacity = function setOpacity(element, value) {\n      element.style.opacity = value;\n      return element;\n    };\n  } else if (supportsFilters) {\n    /** @ignore */\n    setOpacity = function setOpacity(element, value) {\n      var es = element.style;\n\n      if (element.currentStyle && !element.currentStyle.hasLayout) {\n        es.zoom = 1;\n      }\n\n      if (reOpacity.test(es.filter)) {\n        value = value >= 0.9999 ? '' : 'alpha(opacity=' + value * 100 + ')';\n        es.filter = es.filter.replace(reOpacity, value);\n      } else {\n        es.filter += ' alpha(opacity=' + value * 100 + ')';\n      }\n\n      return element;\n    };\n  }\n\n  fabric.util.setStyle = setStyle;\n})();\n\n(function () {\n  var _slice = Array.prototype.slice;\n  /**\n   * Takes id and returns an element with that id (if one exists in a document)\n   * @memberOf fabric.util\n   * @param {String|HTMLElement} id\n   * @return {HTMLElement|null}\n   */\n\n  function getById(id) {\n    return typeof id === 'string' ? fabric.document.getElementById(id) : id;\n  }\n\n  var sliceCanConvertNodelists,\n\n  /**\n   * Converts an array-like object (e.g. arguments or NodeList) to an array\n   * @memberOf fabric.util\n   * @param {Object} arrayLike\n   * @return {Array}\n   */\n  toArray = function toArray(arrayLike) {\n    return _slice.call(arrayLike, 0);\n  };\n\n  try {\n    sliceCanConvertNodelists = toArray(fabric.document.childNodes) instanceof Array;\n  } catch (err) {}\n\n  if (!sliceCanConvertNodelists) {\n    toArray = function toArray(arrayLike) {\n      var arr = new Array(arrayLike.length),\n          i = arrayLike.length;\n\n      while (i--) {\n        arr[i] = arrayLike[i];\n      }\n\n      return arr;\n    };\n  }\n  /**\n   * Creates specified element with specified attributes\n   * @memberOf fabric.util\n   * @param {String} tagName Type of an element to create\n   * @param {Object} [attributes] Attributes to set on an element\n   * @return {HTMLElement} Newly created element\n   */\n\n\n  function makeElement(tagName, attributes) {\n    var el = fabric.document.createElement(tagName);\n\n    for (var prop in attributes) {\n      if (prop === 'class') {\n        el.className = attributes[prop];\n      } else if (prop === 'for') {\n        el.htmlFor = attributes[prop];\n      } else {\n        el.setAttribute(prop, attributes[prop]);\n      }\n    }\n\n    return el;\n  }\n  /**\n   * Adds class to an element\n   * @memberOf fabric.util\n   * @param {HTMLElement} element Element to add class to\n   * @param {String} className Class to add to an element\n   */\n\n\n  function addClass(element, className) {\n    if (element && (' ' + element.className + ' ').indexOf(' ' + className + ' ') === -1) {\n      element.className += (element.className ? ' ' : '') + className;\n    }\n  }\n  /**\n   * Wraps element with another element\n   * @memberOf fabric.util\n   * @param {HTMLElement} element Element to wrap\n   * @param {HTMLElement|String} wrapper Element to wrap with\n   * @param {Object} [attributes] Attributes to set on a wrapper\n   * @return {HTMLElement} wrapper\n   */\n\n\n  function wrapElement(element, wrapper, attributes) {\n    if (typeof wrapper === 'string') {\n      wrapper = makeElement(wrapper, attributes);\n    }\n\n    if (element.parentNode) {\n      element.parentNode.replaceChild(wrapper, element);\n    }\n\n    wrapper.appendChild(element);\n    return wrapper;\n  }\n  /**\n   * Returns element scroll offsets\n   * @memberOf fabric.util\n   * @param {HTMLElement} element Element to operate on\n   * @return {Object} Object with left/top values\n   */\n\n\n  function getScrollLeftTop(element) {\n    var left = 0,\n        top = 0,\n        docElement = fabric.document.documentElement,\n        body = fabric.document.body || {\n      scrollLeft: 0,\n      scrollTop: 0\n    }; // While loop checks (and then sets element to) .parentNode OR .host\n    //  to account for ShadowDOM. We still want to traverse up out of ShadowDOM,\n    //  but the .parentNode of a root ShadowDOM node will always be null, instead\n    //  it should be accessed through .host. See http://stackoverflow.com/a/24765528/4383938\n\n    while (element && (element.parentNode || element.host)) {\n      // Set element to element parent, or 'host' in case of ShadowDOM\n      element = element.parentNode || element.host;\n\n      if (element === fabric.document) {\n        left = body.scrollLeft || docElement.scrollLeft || 0;\n        top = body.scrollTop || docElement.scrollTop || 0;\n      } else {\n        left += element.scrollLeft || 0;\n        top += element.scrollTop || 0;\n      }\n\n      if (element.nodeType === 1 && element.style.position === 'fixed') {\n        break;\n      }\n    }\n\n    return {\n      left: left,\n      top: top\n    };\n  }\n  /**\n   * Returns offset for a given element\n   * @function\n   * @memberOf fabric.util\n   * @param {HTMLElement} element Element to get offset for\n   * @return {Object} Object with \"left\" and \"top\" properties\n   */\n\n\n  function getElementOffset(element) {\n    var docElem,\n        doc = element && element.ownerDocument,\n        box = {\n      left: 0,\n      top: 0\n    },\n        offset = {\n      left: 0,\n      top: 0\n    },\n        scrollLeftTop,\n        offsetAttributes = {\n      borderLeftWidth: 'left',\n      borderTopWidth: 'top',\n      paddingLeft: 'left',\n      paddingTop: 'top'\n    };\n\n    if (!doc) {\n      return offset;\n    }\n\n    for (var attr in offsetAttributes) {\n      offset[offsetAttributes[attr]] += parseInt(getElementStyle(element, attr), 10) || 0;\n    }\n\n    docElem = doc.documentElement;\n\n    if (typeof element.getBoundingClientRect !== 'undefined') {\n      box = element.getBoundingClientRect();\n    }\n\n    scrollLeftTop = getScrollLeftTop(element);\n    return {\n      left: box.left + scrollLeftTop.left - (docElem.clientLeft || 0) + offset.left,\n      top: box.top + scrollLeftTop.top - (docElem.clientTop || 0) + offset.top\n    };\n  }\n  /**\n   * Returns style attribute value of a given element\n   * @memberOf fabric.util\n   * @param {HTMLElement} element Element to get style attribute for\n   * @param {String} attr Style attribute to get for element\n   * @return {String} Style attribute value of the given element.\n   */\n\n\n  var getElementStyle;\n\n  if (fabric.document.defaultView && fabric.document.defaultView.getComputedStyle) {\n    getElementStyle = function getElementStyle(element, attr) {\n      var style = fabric.document.defaultView.getComputedStyle(element, null);\n      return style ? style[attr] : undefined;\n    };\n  } else {\n    getElementStyle = function getElementStyle(element, attr) {\n      var value = element.style[attr];\n\n      if (!value && element.currentStyle) {\n        value = element.currentStyle[attr];\n      }\n\n      return value;\n    };\n  }\n\n  (function () {\n    var style = fabric.document.documentElement.style,\n        selectProp = 'userSelect' in style ? 'userSelect' : 'MozUserSelect' in style ? 'MozUserSelect' : 'WebkitUserSelect' in style ? 'WebkitUserSelect' : 'KhtmlUserSelect' in style ? 'KhtmlUserSelect' : '';\n    /**\n     * Makes element unselectable\n     * @memberOf fabric.util\n     * @param {HTMLElement} element Element to make unselectable\n     * @return {HTMLElement} Element that was passed in\n     */\n\n    function makeElementUnselectable(element) {\n      if (typeof element.onselectstart !== 'undefined') {\n        element.onselectstart = fabric.util.falseFunction;\n      }\n\n      if (selectProp) {\n        element.style[selectProp] = 'none';\n      } else if (typeof element.unselectable === 'string') {\n        element.unselectable = 'on';\n      }\n\n      return element;\n    }\n    /**\n     * Makes element selectable\n     * @memberOf fabric.util\n     * @param {HTMLElement} element Element to make selectable\n     * @return {HTMLElement} Element that was passed in\n     */\n\n\n    function makeElementSelectable(element) {\n      if (typeof element.onselectstart !== 'undefined') {\n        element.onselectstart = null;\n      }\n\n      if (selectProp) {\n        element.style[selectProp] = '';\n      } else if (typeof element.unselectable === 'string') {\n        element.unselectable = '';\n      }\n\n      return element;\n    }\n\n    fabric.util.makeElementUnselectable = makeElementUnselectable;\n    fabric.util.makeElementSelectable = makeElementSelectable;\n  })();\n\n  (function () {\n    /**\n     * Inserts a script element with a given url into a document; invokes callback, when that script is finished loading\n     * @memberOf fabric.util\n     * @param {String} url URL of a script to load\n     * @param {Function} callback Callback to execute when script is finished loading\n     */\n    function getScript(url, callback) {\n      var headEl = fabric.document.getElementsByTagName('head')[0],\n          scriptEl = fabric.document.createElement('script'),\n          loading = true;\n      /** @ignore */\n\n      scriptEl.onload =\n      /** @ignore */\n      scriptEl.onreadystatechange = function (e) {\n        if (loading) {\n          if (typeof this.readyState === 'string' && this.readyState !== 'loaded' && this.readyState !== 'complete') {\n            return;\n          }\n\n          loading = false;\n          callback(e || fabric.window.event);\n          scriptEl = scriptEl.onload = scriptEl.onreadystatechange = null;\n        }\n      };\n\n      scriptEl.src = url;\n      headEl.appendChild(scriptEl); // causes issue in Opera\n      // headEl.removeChild(scriptEl);\n    }\n\n    fabric.util.getScript = getScript;\n  })();\n\n  function getNodeCanvas(element) {\n    var impl = fabric.jsdomImplForWrapper(element);\n    return impl._canvas || impl._image;\n  }\n\n  ;\n\n  function cleanUpJsdomNode(element) {\n    if (!fabric.isLikelyNode) {\n      return;\n    }\n\n    var impl = fabric.jsdomImplForWrapper(element);\n\n    if (impl) {\n      impl._image = null;\n      impl._canvas = null; // unsure if necessary\n\n      impl._currentSrc = null;\n      impl._attributes = null;\n      impl._classList = null;\n    }\n  }\n\n  fabric.util.getById = getById;\n  fabric.util.toArray = toArray;\n  fabric.util.makeElement = makeElement;\n  fabric.util.addClass = addClass;\n  fabric.util.wrapElement = wrapElement;\n  fabric.util.getScrollLeftTop = getScrollLeftTop;\n  fabric.util.getElementOffset = getElementOffset;\n  fabric.util.getElementStyle = getElementStyle;\n  fabric.util.getNodeCanvas = getNodeCanvas;\n  fabric.util.cleanUpJsdomNode = cleanUpJsdomNode;\n})();\n\n(function () {\n  function addParamToUrl(url, param) {\n    return url + (/\\?/.test(url) ? '&' : '?') + param;\n  }\n\n  function emptyFn() {}\n  /**\n   * Cross-browser abstraction for sending XMLHttpRequest\n   * @memberOf fabric.util\n   * @param {String} url URL to send XMLHttpRequest to\n   * @param {Object} [options] Options object\n   * @param {String} [options.method=\"GET\"]\n   * @param {String} [options.parameters] parameters to append to url in GET or in body\n   * @param {String} [options.body] body to send with POST or PUT request\n   * @param {Function} options.onComplete Callback to invoke when request is completed\n   * @return {XMLHttpRequest} request\n   */\n\n\n  function request(url, options) {\n    options || (options = {});\n\n    var method = options.method ? options.method.toUpperCase() : 'GET',\n        onComplete = options.onComplete || function () {},\n        xhr = new fabric.window.XMLHttpRequest(),\n        body = options.body || options.parameters;\n    /** @ignore */\n\n\n    xhr.onreadystatechange = function () {\n      if (xhr.readyState === 4) {\n        onComplete(xhr);\n        xhr.onreadystatechange = emptyFn;\n      }\n    };\n\n    if (method === 'GET') {\n      body = null;\n\n      if (typeof options.parameters === 'string') {\n        url = addParamToUrl(url, options.parameters);\n      }\n    }\n\n    xhr.open(method, url, true);\n\n    if (method === 'POST' || method === 'PUT') {\n      xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');\n    }\n\n    xhr.send(body);\n    return xhr;\n  }\n\n  fabric.util.request = request;\n})();\n/**\n * Wrapper around `console.log` (when available)\n * @param {*} [values] Values to log\n */\n\n\nfabric.log = console.log;\n/**\n * Wrapper around `console.warn` (when available)\n * @param {*} [values] Values to log as a warning\n */\n\nfabric.warn = console.warn;\n\n(function () {\n  function noop() {\n    return false;\n  }\n\n  function defaultEasing(t, b, c, d) {\n    return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;\n  }\n  /**\n   * Changes value from one to another within certain period of time, invoking callbacks as value is being changed.\n   * @memberOf fabric.util\n   * @param {Object} [options] Animation options\n   * @param {Function} [options.onChange] Callback; invoked on every value change\n   * @param {Function} [options.onComplete] Callback; invoked when value change is completed\n   * @param {Number} [options.startValue=0] Starting value\n   * @param {Number} [options.endValue=100] Ending value\n   * @param {Number} [options.byValue=100] Value to modify the property by\n   * @param {Function} [options.easing] Easing function\n   * @param {Number} [options.duration=500] Duration of change (in ms)\n   * @param {Function} [options.abort] Additional function with logic. If returns true, onComplete is called.\n   */\n\n\n  function animate(options) {\n    requestAnimFrame(function (timestamp) {\n      options || (options = {});\n      var start = timestamp || +new Date(),\n          duration = options.duration || 500,\n          finish = start + duration,\n          time,\n          onChange = options.onChange || noop,\n          abort = options.abort || noop,\n          onComplete = options.onComplete || noop,\n          easing = options.easing || defaultEasing,\n          startValue = 'startValue' in options ? options.startValue : 0,\n          endValue = 'endValue' in options ? options.endValue : 100,\n          byValue = options.byValue || endValue - startValue;\n      options.onStart && options.onStart();\n\n      (function tick(ticktime) {\n        // TODO: move abort call after calculation\n        // and pass (current,valuePerc, timePerc) as arguments\n        time = ticktime || +new Date();\n        var currentTime = time > finish ? duration : time - start,\n            timePerc = currentTime / duration,\n            current = easing(currentTime, startValue, byValue, duration),\n            valuePerc = Math.abs((current - startValue) / byValue);\n\n        if (abort()) {\n          onComplete(endValue, 1, 1);\n          return;\n        }\n\n        if (time > finish) {\n          onChange(endValue, 1, 1);\n          onComplete(endValue, 1, 1);\n          return;\n        } else {\n          onChange(current, valuePerc, timePerc);\n          requestAnimFrame(tick);\n        }\n      })(start);\n    });\n  }\n\n  var _requestAnimFrame = fabric.window.requestAnimationFrame || fabric.window.webkitRequestAnimationFrame || fabric.window.mozRequestAnimationFrame || fabric.window.oRequestAnimationFrame || fabric.window.msRequestAnimationFrame || function (callback) {\n    return fabric.window.setTimeout(callback, 1000 / 60);\n  };\n\n  var _cancelAnimFrame = fabric.window.cancelAnimationFrame || fabric.window.clearTimeout;\n  /**\n   * requestAnimationFrame polyfill based on http://paulirish.com/2011/requestanimationframe-for-smart-animating/\n   * In order to get a precise start time, `requestAnimFrame` should be called as an entry into the method\n   * @memberOf fabric.util\n   * @param {Function} callback Callback to invoke\n   * @param {DOMElement} element optional Element to associate with animation\n   */\n\n\n  function requestAnimFrame() {\n    return _requestAnimFrame.apply(fabric.window, arguments);\n  }\n\n  function cancelAnimFrame() {\n    return _cancelAnimFrame.apply(fabric.window, arguments);\n  }\n\n  fabric.util.animate = animate;\n  fabric.util.requestAnimFrame = requestAnimFrame;\n  fabric.util.cancelAnimFrame = cancelAnimFrame;\n})();\n\n(function () {\n  // Calculate an in-between color. Returns a \"rgba()\" string.\n  // Credit: Edwin Martin <edwin@bitstorm.org>\n  //         http://www.bitstorm.org/jquery/color-animation/jquery.animate-colors.js\n  function calculateColor(begin, end, pos) {\n    var color = 'rgba(' + parseInt(begin[0] + pos * (end[0] - begin[0]), 10) + ',' + parseInt(begin[1] + pos * (end[1] - begin[1]), 10) + ',' + parseInt(begin[2] + pos * (end[2] - begin[2]), 10);\n    color += ',' + (begin && end ? parseFloat(begin[3] + pos * (end[3] - begin[3])) : 1);\n    color += ')';\n    return color;\n  }\n  /**\n   * Changes the color from one to another within certain period of time, invoking callbacks as value is being changed.\n   * @memberOf fabric.util\n   * @param {String} fromColor The starting color in hex or rgb(a) format.\n   * @param {String} toColor The starting color in hex or rgb(a) format.\n   * @param {Number} [duration] Duration of change (in ms).\n   * @param {Object} [options] Animation options\n   * @param {Function} [options.onChange] Callback; invoked on every value change\n   * @param {Function} [options.onComplete] Callback; invoked when value change is completed\n   * @param {Function} [options.colorEasing] Easing function. Note that this function only take two arguments (currentTime, duration). Thus the regular animation easing functions cannot be used.\n   * @param {Function} [options.abort] Additional function with logic. If returns true, onComplete is called.\n   */\n\n\n  function animateColor(fromColor, toColor, duration, options) {\n    var startColor = new fabric.Color(fromColor).getSource(),\n        endColor = new fabric.Color(toColor).getSource();\n    options = options || {};\n    fabric.util.animate(fabric.util.object.extend(options, {\n      duration: duration || 500,\n      startValue: startColor,\n      endValue: endColor,\n      byValue: endColor,\n      easing: function easing(currentTime, startValue, byValue, duration) {\n        var posValue = options.colorEasing ? options.colorEasing(currentTime, duration) : 1 - Math.cos(currentTime / duration * (Math.PI / 2));\n        return calculateColor(startValue, byValue, posValue);\n      }\n    }));\n  }\n\n  fabric.util.animateColor = animateColor;\n})();\n\n(function (global) {\n  'use strict';\n  /* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.Point) {\n    fabric.warn('fabric.Point is already defined');\n    return;\n  }\n\n  fabric.Point = Point;\n  /**\n   * Point class\n   * @class fabric.Point\n   * @memberOf fabric\n   * @constructor\n   * @param {Number} x\n   * @param {Number} y\n   * @return {fabric.Point} thisArg\n   */\n\n  function Point(x, y) {\n    this.x = x;\n    this.y = y;\n  }\n\n  Point.prototype =\n  /** @lends fabric.Point.prototype */\n  {\n    type: 'point',\n    constructor: Point,\n\n    /**\n     * Adds another point to this one and returns another one\n     * @param {fabric.Point} that\n     * @return {fabric.Point} new Point instance with added values\n     */\n    add: function add(that) {\n      return new Point(this.x + that.x, this.y + that.y);\n    },\n\n    /**\n     * Adds another point to this one\n     * @param {fabric.Point} that\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    addEquals: function addEquals(that) {\n      this.x += that.x;\n      this.y += that.y;\n      return this;\n    },\n\n    /**\n     * Adds value to this point and returns a new one\n     * @param {Number} scalar\n     * @return {fabric.Point} new Point with added value\n     */\n    scalarAdd: function scalarAdd(scalar) {\n      return new Point(this.x + scalar, this.y + scalar);\n    },\n\n    /**\n     * Adds value to this point\n     * @param {Number} scalar\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    scalarAddEquals: function scalarAddEquals(scalar) {\n      this.x += scalar;\n      this.y += scalar;\n      return this;\n    },\n\n    /**\n     * Subtracts another point from this point and returns a new one\n     * @param {fabric.Point} that\n     * @return {fabric.Point} new Point object with subtracted values\n     */\n    subtract: function subtract(that) {\n      return new Point(this.x - that.x, this.y - that.y);\n    },\n\n    /**\n     * Subtracts another point from this point\n     * @param {fabric.Point} that\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    subtractEquals: function subtractEquals(that) {\n      this.x -= that.x;\n      this.y -= that.y;\n      return this;\n    },\n\n    /**\n     * Subtracts value from this point and returns a new one\n     * @param {Number} scalar\n     * @return {fabric.Point}\n     */\n    scalarSubtract: function scalarSubtract(scalar) {\n      return new Point(this.x - scalar, this.y - scalar);\n    },\n\n    /**\n     * Subtracts value from this point\n     * @param {Number} scalar\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    scalarSubtractEquals: function scalarSubtractEquals(scalar) {\n      this.x -= scalar;\n      this.y -= scalar;\n      return this;\n    },\n\n    /**\n     * Multiplies this point by a value and returns a new one\n     * TODO: rename in scalarMultiply in 2.0\n     * @param {Number} scalar\n     * @return {fabric.Point}\n     */\n    multiply: function multiply(scalar) {\n      return new Point(this.x * scalar, this.y * scalar);\n    },\n\n    /**\n     * Multiplies this point by a value\n     * TODO: rename in scalarMultiplyEquals in 2.0\n     * @param {Number} scalar\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    multiplyEquals: function multiplyEquals(scalar) {\n      this.x *= scalar;\n      this.y *= scalar;\n      return this;\n    },\n\n    /**\n     * Divides this point by a value and returns a new one\n     * TODO: rename in scalarDivide in 2.0\n     * @param {Number} scalar\n     * @return {fabric.Point}\n     */\n    divide: function divide(scalar) {\n      return new Point(this.x / scalar, this.y / scalar);\n    },\n\n    /**\n     * Divides this point by a value\n     * TODO: rename in scalarDivideEquals in 2.0\n     * @param {Number} scalar\n     * @return {fabric.Point} thisArg\n     * @chainable\n     */\n    divideEquals: function divideEquals(scalar) {\n      this.x /= scalar;\n      this.y /= scalar;\n      return this;\n    },\n\n    /**\n     * Returns true if this point is equal to another one\n     * @param {fabric.Point} that\n     * @return {Boolean}\n     */\n    eq: function eq(that) {\n      return this.x === that.x && this.y === that.y;\n    },\n\n    /**\n     * Returns true if this point is less than another one\n     * @param {fabric.Point} that\n     * @return {Boolean}\n     */\n    lt: function lt(that) {\n      return this.x < that.x && this.y < that.y;\n    },\n\n    /**\n     * Returns true if this point is less than or equal to another one\n     * @param {fabric.Point} that\n     * @return {Boolean}\n     */\n    lte: function lte(that) {\n      return this.x <= that.x && this.y <= that.y;\n    },\n\n    /**\n      * Returns true if this point is greater another one\n     * @param {fabric.Point} that\n     * @return {Boolean}\n     */\n    gt: function gt(that) {\n      return this.x > that.x && this.y > that.y;\n    },\n\n    /**\n     * Returns true if this point is greater than or equal to another one\n     * @param {fabric.Point} that\n     * @return {Boolean}\n     */\n    gte: function gte(that) {\n      return this.x >= that.x && this.y >= that.y;\n    },\n\n    /**\n     * Returns new point which is the result of linear interpolation with this one and another one\n     * @param {fabric.Point} that\n     * @param {Number} t , position of interpolation, between 0 and 1 default 0.5\n     * @return {fabric.Point}\n     */\n    lerp: function lerp(that, t) {\n      if (typeof t === 'undefined') {\n        t = 0.5;\n      }\n\n      t = Math.max(Math.min(1, t), 0);\n      return new Point(this.x + (that.x - this.x) * t, this.y + (that.y - this.y) * t);\n    },\n\n    /**\n     * Returns distance from this point and another one\n     * @param {fabric.Point} that\n     * @return {Number}\n     */\n    distanceFrom: function distanceFrom(that) {\n      var dx = this.x - that.x,\n          dy = this.y - that.y;\n      return Math.sqrt(dx * dx + dy * dy);\n    },\n\n    /**\n     * Returns the point between this point and another one\n     * @param {fabric.Point} that\n     * @return {fabric.Point}\n     */\n    midPointFrom: function midPointFrom(that) {\n      return this.lerp(that);\n    },\n\n    /**\n     * Returns a new point which is the min of this and another one\n     * @param {fabric.Point} that\n     * @return {fabric.Point}\n     */\n    min: function min(that) {\n      return new Point(Math.min(this.x, that.x), Math.min(this.y, that.y));\n    },\n\n    /**\n     * Returns a new point which is the max of this and another one\n     * @param {fabric.Point} that\n     * @return {fabric.Point}\n     */\n    max: function max(that) {\n      return new Point(Math.max(this.x, that.x), Math.max(this.y, that.y));\n    },\n\n    /**\n     * Returns string representation of this point\n     * @return {String}\n     */\n    toString: function toString() {\n      return this.x + ',' + this.y;\n    },\n\n    /**\n     * Sets x/y of this point\n     * @param {Number} x\n     * @param {Number} y\n     * @chainable\n     */\n    setXY: function setXY(x, y) {\n      this.x = x;\n      this.y = y;\n      return this;\n    },\n\n    /**\n     * Sets x of this point\n     * @param {Number} x\n     * @chainable\n     */\n    setX: function setX(x) {\n      this.x = x;\n      return this;\n    },\n\n    /**\n     * Sets y of this point\n     * @param {Number} y\n     * @chainable\n     */\n    setY: function setY(y) {\n      this.y = y;\n      return this;\n    },\n\n    /**\n     * Sets x/y of this point from another point\n     * @param {fabric.Point} that\n     * @chainable\n     */\n    setFromPoint: function setFromPoint(that) {\n      this.x = that.x;\n      this.y = that.y;\n      return this;\n    },\n\n    /**\n     * Swaps x/y of this point and another point\n     * @param {fabric.Point} that\n     */\n    swap: function swap(that) {\n      var x = this.x,\n          y = this.y;\n      this.x = that.x;\n      this.y = that.y;\n      that.x = x;\n      that.y = y;\n    },\n\n    /**\n     * return a cloned instance of the point\n     * @return {fabric.Point}\n     */\n    clone: function clone() {\n      return new Point(this.x, this.y);\n    }\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n  /* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.Intersection) {\n    fabric.warn('fabric.Intersection is already defined');\n    return;\n  }\n  /**\n   * Intersection class\n   * @class fabric.Intersection\n   * @memberOf fabric\n   * @constructor\n   */\n\n\n  function Intersection(status) {\n    this.status = status;\n    this.points = [];\n  }\n\n  fabric.Intersection = Intersection;\n  fabric.Intersection.prototype =\n  /** @lends fabric.Intersection.prototype */\n  {\n    constructor: Intersection,\n\n    /**\n     * Appends a point to intersection\n     * @param {fabric.Point} point\n     * @return {fabric.Intersection} thisArg\n     * @chainable\n     */\n    appendPoint: function appendPoint(point) {\n      this.points.push(point);\n      return this;\n    },\n\n    /**\n     * Appends points to intersection\n     * @param {Array} points\n     * @return {fabric.Intersection} thisArg\n     * @chainable\n     */\n    appendPoints: function appendPoints(points) {\n      this.points = this.points.concat(points);\n      return this;\n    }\n  };\n  /**\n   * Checks if one line intersects another\n   * TODO: rename in intersectSegmentSegment\n   * @static\n   * @param {fabric.Point} a1\n   * @param {fabric.Point} a2\n   * @param {fabric.Point} b1\n   * @param {fabric.Point} b2\n   * @return {fabric.Intersection}\n   */\n\n  fabric.Intersection.intersectLineLine = function (a1, a2, b1, b2) {\n    var result,\n        uaT = (b2.x - b1.x) * (a1.y - b1.y) - (b2.y - b1.y) * (a1.x - b1.x),\n        ubT = (a2.x - a1.x) * (a1.y - b1.y) - (a2.y - a1.y) * (a1.x - b1.x),\n        uB = (b2.y - b1.y) * (a2.x - a1.x) - (b2.x - b1.x) * (a2.y - a1.y);\n\n    if (uB !== 0) {\n      var ua = uaT / uB,\n          ub = ubT / uB;\n\n      if (0 <= ua && ua <= 1 && 0 <= ub && ub <= 1) {\n        result = new Intersection('Intersection');\n        result.appendPoint(new fabric.Point(a1.x + ua * (a2.x - a1.x), a1.y + ua * (a2.y - a1.y)));\n      } else {\n        result = new Intersection();\n      }\n    } else {\n      if (uaT === 0 || ubT === 0) {\n        result = new Intersection('Coincident');\n      } else {\n        result = new Intersection('Parallel');\n      }\n    }\n\n    return result;\n  };\n  /**\n   * Checks if line intersects polygon\n   * TODO: rename in intersectSegmentPolygon\n   * fix detection of coincident\n   * @static\n   * @param {fabric.Point} a1\n   * @param {fabric.Point} a2\n   * @param {Array} points\n   * @return {fabric.Intersection}\n   */\n\n\n  fabric.Intersection.intersectLinePolygon = function (a1, a2, points) {\n    var result = new Intersection(),\n        length = points.length,\n        b1,\n        b2,\n        inter,\n        i;\n\n    for (i = 0; i < length; i++) {\n      b1 = points[i];\n      b2 = points[(i + 1) % length];\n      inter = Intersection.intersectLineLine(a1, a2, b1, b2);\n      result.appendPoints(inter.points);\n    }\n\n    if (result.points.length > 0) {\n      result.status = 'Intersection';\n    }\n\n    return result;\n  };\n  /**\n   * Checks if polygon intersects another polygon\n   * @static\n   * @param {Array} points1\n   * @param {Array} points2\n   * @return {fabric.Intersection}\n   */\n\n\n  fabric.Intersection.intersectPolygonPolygon = function (points1, points2) {\n    var result = new Intersection(),\n        length = points1.length,\n        i;\n\n    for (i = 0; i < length; i++) {\n      var a1 = points1[i],\n          a2 = points1[(i + 1) % length],\n          inter = Intersection.intersectLinePolygon(a1, a2, points2);\n      result.appendPoints(inter.points);\n    }\n\n    if (result.points.length > 0) {\n      result.status = 'Intersection';\n    }\n\n    return result;\n  };\n  /**\n   * Checks if polygon intersects rectangle\n   * @static\n   * @param {Array} points\n   * @param {fabric.Point} r1\n   * @param {fabric.Point} r2\n   * @return {fabric.Intersection}\n   */\n\n\n  fabric.Intersection.intersectPolygonRectangle = function (points, r1, r2) {\n    var min = r1.min(r2),\n        max = r1.max(r2),\n        topRight = new fabric.Point(max.x, min.y),\n        bottomLeft = new fabric.Point(min.x, max.y),\n        inter1 = Intersection.intersectLinePolygon(min, topRight, points),\n        inter2 = Intersection.intersectLinePolygon(topRight, max, points),\n        inter3 = Intersection.intersectLinePolygon(max, bottomLeft, points),\n        inter4 = Intersection.intersectLinePolygon(bottomLeft, min, points),\n        result = new Intersection();\n    result.appendPoints(inter1.points);\n    result.appendPoints(inter2.points);\n    result.appendPoints(inter3.points);\n    result.appendPoints(inter4.points);\n\n    if (result.points.length > 0) {\n      result.status = 'Intersection';\n    }\n\n    return result;\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.Color) {\n    fabric.warn('fabric.Color is already defined.');\n    return;\n  }\n  /**\n   * Color class\n   * The purpose of {@link fabric.Color} is to abstract and encapsulate common color operations;\n   * {@link fabric.Color} is a constructor and creates instances of {@link fabric.Color} objects.\n   *\n   * @class fabric.Color\n   * @param {String} color optional in hex or rgb(a) or hsl format or from known color list\n   * @return {fabric.Color} thisArg\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-2/#colors}\n   */\n\n\n  function Color(color) {\n    if (!color) {\n      this.setSource([0, 0, 0, 1]);\n    } else {\n      this._tryParsingColor(color);\n    }\n  }\n\n  fabric.Color = Color;\n  fabric.Color.prototype =\n  /** @lends fabric.Color.prototype */\n  {\n    /**\n     * @private\n     * @param {String|Array} color Color value to parse\n     */\n    _tryParsingColor: function _tryParsingColor(color) {\n      var source;\n\n      if (color in Color.colorNameMap) {\n        color = Color.colorNameMap[color];\n      }\n\n      if (color === 'transparent') {\n        source = [255, 255, 255, 0];\n      }\n\n      if (!source) {\n        source = Color.sourceFromHex(color);\n      }\n\n      if (!source) {\n        source = Color.sourceFromRgb(color);\n      }\n\n      if (!source) {\n        source = Color.sourceFromHsl(color);\n      }\n\n      if (!source) {\n        //if color is not recognize let's make black as canvas does\n        source = [0, 0, 0, 1];\n      }\n\n      if (source) {\n        this.setSource(source);\n      }\n    },\n\n    /**\n     * Adapted from <a href=\"https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html\">https://github.com/mjijackson</a>\n     * @private\n     * @param {Number} r Red color value\n     * @param {Number} g Green color value\n     * @param {Number} b Blue color value\n     * @return {Array} Hsl color\n     */\n    _rgbToHsl: function _rgbToHsl(r, g, b) {\n      r /= 255;\n      g /= 255;\n      b /= 255;\n      var h,\n          s,\n          l,\n          max = fabric.util.array.max([r, g, b]),\n          min = fabric.util.array.min([r, g, b]);\n      l = (max + min) / 2;\n\n      if (max === min) {\n        h = s = 0; // achromatic\n      } else {\n        var d = max - min;\n        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n        switch (max) {\n          case r:\n            h = (g - b) / d + (g < b ? 6 : 0);\n            break;\n\n          case g:\n            h = (b - r) / d + 2;\n            break;\n\n          case b:\n            h = (r - g) / d + 4;\n            break;\n        }\n\n        h /= 6;\n      }\n\n      return [Math.round(h * 360), Math.round(s * 100), Math.round(l * 100)];\n    },\n\n    /**\n     * Returns source of this color (where source is an array representation; ex: [200, 200, 100, 1])\n     * @return {Array}\n     */\n    getSource: function getSource() {\n      return this._source;\n    },\n\n    /**\n     * Sets source of this color (where source is an array representation; ex: [200, 200, 100, 1])\n     * @param {Array} source\n     */\n    setSource: function setSource(source) {\n      this._source = source;\n    },\n\n    /**\n     * Returns color representation in RGB format\n     * @return {String} ex: rgb(0-255,0-255,0-255)\n     */\n    toRgb: function toRgb() {\n      var source = this.getSource();\n      return 'rgb(' + source[0] + ',' + source[1] + ',' + source[2] + ')';\n    },\n\n    /**\n     * Returns color representation in RGBA format\n     * @return {String} ex: rgba(0-255,0-255,0-255,0-1)\n     */\n    toRgba: function toRgba() {\n      var source = this.getSource();\n      return 'rgba(' + source[0] + ',' + source[1] + ',' + source[2] + ',' + source[3] + ')';\n    },\n\n    /**\n     * Returns color representation in HSL format\n     * @return {String} ex: hsl(0-360,0%-100%,0%-100%)\n     */\n    toHsl: function toHsl() {\n      var source = this.getSource(),\n          hsl = this._rgbToHsl(source[0], source[1], source[2]);\n\n      return 'hsl(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%)';\n    },\n\n    /**\n     * Returns color representation in HSLA format\n     * @return {String} ex: hsla(0-360,0%-100%,0%-100%,0-1)\n     */\n    toHsla: function toHsla() {\n      var source = this.getSource(),\n          hsl = this._rgbToHsl(source[0], source[1], source[2]);\n\n      return 'hsla(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%,' + source[3] + ')';\n    },\n\n    /**\n     * Returns color representation in HEX format\n     * @return {String} ex: FF5555\n     */\n    toHex: function toHex() {\n      var source = this.getSource(),\n          r,\n          g,\n          b;\n      r = source[0].toString(16);\n      r = r.length === 1 ? '0' + r : r;\n      g = source[1].toString(16);\n      g = g.length === 1 ? '0' + g : g;\n      b = source[2].toString(16);\n      b = b.length === 1 ? '0' + b : b;\n      return r.toUpperCase() + g.toUpperCase() + b.toUpperCase();\n    },\n\n    /**\n     * Returns color representation in HEXA format\n     * @return {String} ex: FF5555CC\n     */\n    toHexa: function toHexa() {\n      var source = this.getSource(),\n          a;\n      a = Math.round(source[3] * 255);\n      a = a.toString(16);\n      a = a.length === 1 ? '0' + a : a;\n      return this.toHex() + a.toUpperCase();\n    },\n\n    /**\n     * Gets value of alpha channel for this color\n     * @return {Number} 0-1\n     */\n    getAlpha: function getAlpha() {\n      return this.getSource()[3];\n    },\n\n    /**\n     * Sets value of alpha channel for this color\n     * @param {Number} alpha Alpha value 0-1\n     * @return {fabric.Color} thisArg\n     */\n    setAlpha: function setAlpha(alpha) {\n      var source = this.getSource();\n      source[3] = alpha;\n      this.setSource(source);\n      return this;\n    },\n\n    /**\n     * Transforms color to its grayscale representation\n     * @return {fabric.Color} thisArg\n     */\n    toGrayscale: function toGrayscale() {\n      var source = this.getSource(),\n          average = parseInt((source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0), 10),\n          currentAlpha = source[3];\n      this.setSource([average, average, average, currentAlpha]);\n      return this;\n    },\n\n    /**\n     * Transforms color to its black and white representation\n     * @param {Number} threshold\n     * @return {fabric.Color} thisArg\n     */\n    toBlackWhite: function toBlackWhite(threshold) {\n      var source = this.getSource(),\n          average = (source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0),\n          currentAlpha = source[3];\n      threshold = threshold || 127;\n      average = Number(average) < Number(threshold) ? 0 : 255;\n      this.setSource([average, average, average, currentAlpha]);\n      return this;\n    },\n\n    /**\n     * Overlays color with another color\n     * @param {String|fabric.Color} otherColor\n     * @return {fabric.Color} thisArg\n     */\n    overlayWith: function overlayWith(otherColor) {\n      if (!(otherColor instanceof Color)) {\n        otherColor = new Color(otherColor);\n      }\n\n      var result = [],\n          alpha = this.getAlpha(),\n          otherAlpha = 0.5,\n          source = this.getSource(),\n          otherSource = otherColor.getSource(),\n          i;\n\n      for (i = 0; i < 3; i++) {\n        result.push(Math.round(source[i] * (1 - otherAlpha) + otherSource[i] * otherAlpha));\n      }\n\n      result[3] = alpha;\n      this.setSource(result);\n      return this;\n    }\n  };\n  /**\n   * Regex matching color in RGB or RGBA formats (ex: rgb(0, 0, 0), rgba(255, 100, 10, 0.5), rgba( 255 , 100 , 10 , 0.5 ), rgb(1,1,1), rgba(100%, 60%, 10%, 0.5))\n   * @static\n   * @field\n   * @memberOf fabric.Color\n   */\n  // eslint-disable-next-line max-len\n\n  fabric.Color.reRGBa = /^rgba?\\(\\s*(\\d{1,3}(?:\\.\\d+)?\\%?)\\s*,\\s*(\\d{1,3}(?:\\.\\d+)?\\%?)\\s*,\\s*(\\d{1,3}(?:\\.\\d+)?\\%?)\\s*(?:\\s*,\\s*((?:\\d*\\.?\\d+)?)\\s*)?\\)$/i;\n  /**\n   * Regex matching color in HSL or HSLA formats (ex: hsl(200, 80%, 10%), hsla(300, 50%, 80%, 0.5), hsla( 300 , 50% , 80% , 0.5 ))\n   * @static\n   * @field\n   * @memberOf fabric.Color\n   */\n\n  fabric.Color.reHSLa = /^hsla?\\(\\s*(\\d{1,3})\\s*,\\s*(\\d{1,3}\\%)\\s*,\\s*(\\d{1,3}\\%)\\s*(?:\\s*,\\s*(\\d+(?:\\.\\d+)?)\\s*)?\\)$/i;\n  /**\n   * Regex matching color in HEX format (ex: #FF5544CC, #FF5555, 010155, aff)\n   * @static\n   * @field\n   * @memberOf fabric.Color\n   */\n\n  fabric.Color.reHex = /^#?([0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{4}|[0-9a-f]{3})$/i;\n  /**\n   * Map of the 148 color names with HEX code\n   * @static\n   * @field\n   * @memberOf fabric.Color\n   * @see: https://www.w3.org/TR/css3-color/#svg-color\n   */\n\n  fabric.Color.colorNameMap = {\n    aliceblue: '#F0F8FF',\n    antiquewhite: '#FAEBD7',\n    aqua: '#00FFFF',\n    aquamarine: '#7FFFD4',\n    azure: '#F0FFFF',\n    beige: '#F5F5DC',\n    bisque: '#FFE4C4',\n    black: '#000000',\n    blanchedalmond: '#FFEBCD',\n    blue: '#0000FF',\n    blueviolet: '#8A2BE2',\n    brown: '#A52A2A',\n    burlywood: '#DEB887',\n    cadetblue: '#5F9EA0',\n    chartreuse: '#7FFF00',\n    chocolate: '#D2691E',\n    coral: '#FF7F50',\n    cornflowerblue: '#6495ED',\n    cornsilk: '#FFF8DC',\n    crimson: '#DC143C',\n    cyan: '#00FFFF',\n    darkblue: '#00008B',\n    darkcyan: '#008B8B',\n    darkgoldenrod: '#B8860B',\n    darkgray: '#A9A9A9',\n    darkgrey: '#A9A9A9',\n    darkgreen: '#006400',\n    darkkhaki: '#BDB76B',\n    darkmagenta: '#8B008B',\n    darkolivegreen: '#556B2F',\n    darkorange: '#FF8C00',\n    darkorchid: '#9932CC',\n    darkred: '#8B0000',\n    darksalmon: '#E9967A',\n    darkseagreen: '#8FBC8F',\n    darkslateblue: '#483D8B',\n    darkslategray: '#2F4F4F',\n    darkslategrey: '#2F4F4F',\n    darkturquoise: '#00CED1',\n    darkviolet: '#9400D3',\n    deeppink: '#FF1493',\n    deepskyblue: '#00BFFF',\n    dimgray: '#696969',\n    dimgrey: '#696969',\n    dodgerblue: '#1E90FF',\n    firebrick: '#B22222',\n    floralwhite: '#FFFAF0',\n    forestgreen: '#228B22',\n    fuchsia: '#FF00FF',\n    gainsboro: '#DCDCDC',\n    ghostwhite: '#F8F8FF',\n    gold: '#FFD700',\n    goldenrod: '#DAA520',\n    gray: '#808080',\n    grey: '#808080',\n    green: '#008000',\n    greenyellow: '#ADFF2F',\n    honeydew: '#F0FFF0',\n    hotpink: '#FF69B4',\n    indianred: '#CD5C5C',\n    indigo: '#4B0082',\n    ivory: '#FFFFF0',\n    khaki: '#F0E68C',\n    lavender: '#E6E6FA',\n    lavenderblush: '#FFF0F5',\n    lawngreen: '#7CFC00',\n    lemonchiffon: '#FFFACD',\n    lightblue: '#ADD8E6',\n    lightcoral: '#F08080',\n    lightcyan: '#E0FFFF',\n    lightgoldenrodyellow: '#FAFAD2',\n    lightgray: '#D3D3D3',\n    lightgrey: '#D3D3D3',\n    lightgreen: '#90EE90',\n    lightpink: '#FFB6C1',\n    lightsalmon: '#FFA07A',\n    lightseagreen: '#20B2AA',\n    lightskyblue: '#87CEFA',\n    lightslategray: '#778899',\n    lightslategrey: '#778899',\n    lightsteelblue: '#B0C4DE',\n    lightyellow: '#FFFFE0',\n    lime: '#00FF00',\n    limegreen: '#32CD32',\n    linen: '#FAF0E6',\n    magenta: '#FF00FF',\n    maroon: '#800000',\n    mediumaquamarine: '#66CDAA',\n    mediumblue: '#0000CD',\n    mediumorchid: '#BA55D3',\n    mediumpurple: '#9370DB',\n    mediumseagreen: '#3CB371',\n    mediumslateblue: '#7B68EE',\n    mediumspringgreen: '#00FA9A',\n    mediumturquoise: '#48D1CC',\n    mediumvioletred: '#C71585',\n    midnightblue: '#191970',\n    mintcream: '#F5FFFA',\n    mistyrose: '#FFE4E1',\n    moccasin: '#FFE4B5',\n    navajowhite: '#FFDEAD',\n    navy: '#000080',\n    oldlace: '#FDF5E6',\n    olive: '#808000',\n    olivedrab: '#6B8E23',\n    orange: '#FFA500',\n    orangered: '#FF4500',\n    orchid: '#DA70D6',\n    palegoldenrod: '#EEE8AA',\n    palegreen: '#98FB98',\n    paleturquoise: '#AFEEEE',\n    palevioletred: '#DB7093',\n    papayawhip: '#FFEFD5',\n    peachpuff: '#FFDAB9',\n    peru: '#CD853F',\n    pink: '#FFC0CB',\n    plum: '#DDA0DD',\n    powderblue: '#B0E0E6',\n    purple: '#800080',\n    rebeccapurple: '#663399',\n    red: '#FF0000',\n    rosybrown: '#BC8F8F',\n    royalblue: '#4169E1',\n    saddlebrown: '#8B4513',\n    salmon: '#FA8072',\n    sandybrown: '#F4A460',\n    seagreen: '#2E8B57',\n    seashell: '#FFF5EE',\n    sienna: '#A0522D',\n    silver: '#C0C0C0',\n    skyblue: '#87CEEB',\n    slateblue: '#6A5ACD',\n    slategray: '#708090',\n    slategrey: '#708090',\n    snow: '#FFFAFA',\n    springgreen: '#00FF7F',\n    steelblue: '#4682B4',\n    tan: '#D2B48C',\n    teal: '#008080',\n    thistle: '#D8BFD8',\n    tomato: '#FF6347',\n    turquoise: '#40E0D0',\n    violet: '#EE82EE',\n    wheat: '#F5DEB3',\n    white: '#FFFFFF',\n    whitesmoke: '#F5F5F5',\n    yellow: '#FFFF00',\n    yellowgreen: '#9ACD32'\n  };\n  /**\n   * @private\n   * @param {Number} p\n   * @param {Number} q\n   * @param {Number} t\n   * @return {Number}\n   */\n\n  function hue2rgb(p, q, t) {\n    if (t < 0) {\n      t += 1;\n    }\n\n    if (t > 1) {\n      t -= 1;\n    }\n\n    if (t < 1 / 6) {\n      return p + (q - p) * 6 * t;\n    }\n\n    if (t < 1 / 2) {\n      return q;\n    }\n\n    if (t < 2 / 3) {\n      return p + (q - p) * (2 / 3 - t) * 6;\n    }\n\n    return p;\n  }\n  /**\n   * Returns new color object, when given a color in RGB format\n   * @memberOf fabric.Color\n   * @param {String} color Color value ex: rgb(0-255,0-255,0-255)\n   * @return {fabric.Color}\n   */\n\n\n  fabric.Color.fromRgb = function (color) {\n    return Color.fromSource(Color.sourceFromRgb(color));\n  };\n  /**\n   * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in RGB or RGBA format\n   * @memberOf fabric.Color\n   * @param {String} color Color value ex: rgb(0-255,0-255,0-255), rgb(0%-100%,0%-100%,0%-100%)\n   * @return {Array} source\n   */\n\n\n  fabric.Color.sourceFromRgb = function (color) {\n    var match = color.match(Color.reRGBa);\n\n    if (match) {\n      var r = parseInt(match[1], 10) / (/%$/.test(match[1]) ? 100 : 1) * (/%$/.test(match[1]) ? 255 : 1),\n          g = parseInt(match[2], 10) / (/%$/.test(match[2]) ? 100 : 1) * (/%$/.test(match[2]) ? 255 : 1),\n          b = parseInt(match[3], 10) / (/%$/.test(match[3]) ? 100 : 1) * (/%$/.test(match[3]) ? 255 : 1);\n      return [parseInt(r, 10), parseInt(g, 10), parseInt(b, 10), match[4] ? parseFloat(match[4]) : 1];\n    }\n  };\n  /**\n   * Returns new color object, when given a color in RGBA format\n   * @static\n   * @function\n   * @memberOf fabric.Color\n   * @param {String} color\n   * @return {fabric.Color}\n   */\n\n\n  fabric.Color.fromRgba = Color.fromRgb;\n  /**\n   * Returns new color object, when given a color in HSL format\n   * @param {String} color Color value ex: hsl(0-260,0%-100%,0%-100%)\n   * @memberOf fabric.Color\n   * @return {fabric.Color}\n   */\n\n  fabric.Color.fromHsl = function (color) {\n    return Color.fromSource(Color.sourceFromHsl(color));\n  };\n  /**\n   * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HSL or HSLA format.\n   * Adapted from <a href=\"https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html\">https://github.com/mjijackson</a>\n   * @memberOf fabric.Color\n   * @param {String} color Color value ex: hsl(0-360,0%-100%,0%-100%) or hsla(0-360,0%-100%,0%-100%, 0-1)\n   * @return {Array} source\n   * @see http://http://www.w3.org/TR/css3-color/#hsl-color\n   */\n\n\n  fabric.Color.sourceFromHsl = function (color) {\n    var match = color.match(Color.reHSLa);\n\n    if (!match) {\n      return;\n    }\n\n    var h = (parseFloat(match[1]) % 360 + 360) % 360 / 360,\n        s = parseFloat(match[2]) / (/%$/.test(match[2]) ? 100 : 1),\n        l = parseFloat(match[3]) / (/%$/.test(match[3]) ? 100 : 1),\n        r,\n        g,\n        b;\n\n    if (s === 0) {\n      r = g = b = l;\n    } else {\n      var q = l <= 0.5 ? l * (s + 1) : l + s - l * s,\n          p = l * 2 - q;\n      r = hue2rgb(p, q, h + 1 / 3);\n      g = hue2rgb(p, q, h);\n      b = hue2rgb(p, q, h - 1 / 3);\n    }\n\n    return [Math.round(r * 255), Math.round(g * 255), Math.round(b * 255), match[4] ? parseFloat(match[4]) : 1];\n  };\n  /**\n   * Returns new color object, when given a color in HSLA format\n   * @static\n   * @function\n   * @memberOf fabric.Color\n   * @param {String} color\n   * @return {fabric.Color}\n   */\n\n\n  fabric.Color.fromHsla = Color.fromHsl;\n  /**\n   * Returns new color object, when given a color in HEX format\n   * @static\n   * @memberOf fabric.Color\n   * @param {String} color Color value ex: FF5555\n   * @return {fabric.Color}\n   */\n\n  fabric.Color.fromHex = function (color) {\n    return Color.fromSource(Color.sourceFromHex(color));\n  };\n  /**\n   * Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HEX format\n   * @static\n   * @memberOf fabric.Color\n   * @param {String} color ex: FF5555 or FF5544CC (RGBa)\n   * @return {Array} source\n   */\n\n\n  fabric.Color.sourceFromHex = function (color) {\n    if (color.match(Color.reHex)) {\n      var value = color.slice(color.indexOf('#') + 1),\n          isShortNotation = value.length === 3 || value.length === 4,\n          isRGBa = value.length === 8 || value.length === 4,\n          r = isShortNotation ? value.charAt(0) + value.charAt(0) : value.substring(0, 2),\n          g = isShortNotation ? value.charAt(1) + value.charAt(1) : value.substring(2, 4),\n          b = isShortNotation ? value.charAt(2) + value.charAt(2) : value.substring(4, 6),\n          a = isRGBa ? isShortNotation ? value.charAt(3) + value.charAt(3) : value.substring(6, 8) : 'FF';\n      return [parseInt(r, 16), parseInt(g, 16), parseInt(b, 16), parseFloat((parseInt(a, 16) / 255).toFixed(2))];\n    }\n  };\n  /**\n   * Returns new color object, when given color in array representation (ex: [200, 100, 100, 0.5])\n   * @static\n   * @memberOf fabric.Color\n   * @param {Array} source\n   * @return {fabric.Color}\n   */\n\n\n  fabric.Color.fromSource = function (source) {\n    var oColor = new Color();\n    oColor.setSource(source);\n    return oColor;\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      toFixed = fabric.util.toFixed;\n\n  if (fabric.Shadow) {\n    fabric.warn('fabric.Shadow is already defined.');\n    return;\n  }\n  /**\n   * Shadow class\n   * @class fabric.Shadow\n   * @see {@link http://fabricjs.com/shadows|Shadow demo}\n   * @see {@link fabric.Shadow#initialize} for constructor definition\n   */\n\n\n  fabric.Shadow = fabric.util.createClass(\n  /** @lends fabric.Shadow.prototype */\n  {\n    /**\n     * Shadow color\n     * @type String\n     * @default\n     */\n    color: 'rgb(0,0,0)',\n\n    /**\n     * Shadow blur\n     * @type Number\n     */\n    blur: 0,\n\n    /**\n     * Shadow horizontal offset\n     * @type Number\n     * @default\n     */\n    offsetX: 0,\n\n    /**\n     * Shadow vertical offset\n     * @type Number\n     * @default\n     */\n    offsetY: 0,\n\n    /**\n     * Whether the shadow should affect stroke operations\n     * @type Boolean\n     * @default\n     */\n    affectStroke: false,\n\n    /**\n     * Indicates whether toObject should include default values\n     * @type Boolean\n     * @default\n     */\n    includeDefaultValues: true,\n\n    /**\n     * When `false`, the shadow will scale with the object.\n     * When `true`, the shadow's offsetX, offsetY, and blur will not be affected by the object's scale.\n     * default to false\n     * @type Boolean\n     * @default\n     */\n    nonScaling: false,\n\n    /**\n     * Constructor\n     * @param {Object|String} [options] Options object with any of color, blur, offsetX, offsetY properties or string (e.g. \"rgba(0,0,0,0.2) 2px 2px 10px\")\n     * @return {fabric.Shadow} thisArg\n     */\n    initialize: function initialize(options) {\n      if (typeof options === 'string') {\n        options = this._parseShadow(options);\n      }\n\n      for (var prop in options) {\n        this[prop] = options[prop];\n      }\n\n      this.id = fabric.Object.__uid++;\n    },\n\n    /**\n     * @private\n     * @param {String} shadow Shadow value to parse\n     * @return {Object} Shadow object with color, offsetX, offsetY and blur\n     */\n    _parseShadow: function _parseShadow(shadow) {\n      var shadowStr = shadow.trim(),\n          offsetsAndBlur = fabric.Shadow.reOffsetsAndBlur.exec(shadowStr) || [],\n          color = shadowStr.replace(fabric.Shadow.reOffsetsAndBlur, '') || 'rgb(0,0,0)';\n      return {\n        color: color.trim(),\n        offsetX: parseInt(offsetsAndBlur[1], 10) || 0,\n        offsetY: parseInt(offsetsAndBlur[2], 10) || 0,\n        blur: parseInt(offsetsAndBlur[3], 10) || 0\n      };\n    },\n\n    /**\n     * Returns a string representation of an instance\n     * @see http://www.w3.org/TR/css-text-decor-3/#text-shadow\n     * @return {String} Returns CSS3 text-shadow declaration\n     */\n    toString: function toString() {\n      return [this.offsetX, this.offsetY, this.blur, this.color].join('px ');\n    },\n\n    /**\n     * Returns object representation of a shadow\n     * @return {Object} Object representation of a shadow instance\n     */\n    toObject: function toObject() {\n      if (this.includeDefaultValues) {\n        return {\n          color: this.color,\n          blur: this.blur,\n          offsetX: this.offsetX,\n          offsetY: this.offsetY,\n          affectStroke: this.affectStroke,\n          nonScaling: this.nonScaling\n        };\n      }\n\n      var obj = {},\n          proto = fabric.Shadow.prototype;\n      ['color', 'blur', 'offsetX', 'offsetY', 'affectStroke', 'nonScaling'].forEach(function (prop) {\n        if (this[prop] !== proto[prop]) {\n          obj[prop] = this[prop];\n        }\n      }, this);\n      return obj;\n    }\n  });\n  /**\n   * Regex matching shadow offsetX, offsetY and blur (ex: \"2px 2px 10px rgba(0,0,0,0.2)\", \"rgb(0,255,0) 2px 2px\")\n   * @static\n   * @field\n   * @memberOf fabric.Shadow\n   */\n  // eslint-disable-next-line max-len\n\n  fabric.Shadow.reOffsetsAndBlur = /(?:\\s|^)(-?\\d+(?:px)?(?:\\s?|$))?(-?\\d+(?:px)?(?:\\s?|$))?(\\d+(?:px)?)?(?:\\s?|$)(?:$|\\s)/;\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function () {\n  'use strict';\n\n  if (fabric.StaticCanvas) {\n    fabric.warn('fabric.StaticCanvas is already defined.');\n    return;\n  } // aliases for faster resolution\n\n\n  var extend = fabric.util.object.extend,\n      getElementOffset = fabric.util.getElementOffset,\n      removeFromArray = fabric.util.removeFromArray,\n      toFixed = fabric.util.toFixed,\n      transformPoint = fabric.util.transformPoint,\n      invertTransform = fabric.util.invertTransform,\n      getNodeCanvas = fabric.util.getNodeCanvas,\n      createCanvasElement = fabric.util.createCanvasElement,\n      CANVAS_INIT_ERROR = new Error('Could not initialize `canvas` element');\n  /**\n   * Static canvas class\n   * @class fabric.StaticCanvas\n   * @mixes fabric.Collection\n   * @mixes fabric.Observable\n   * @see {@link http://fabricjs.com/static_canvas|StaticCanvas demo}\n   * @see {@link fabric.StaticCanvas#initialize} for constructor definition\n   * @fires before:render\n   * @fires after:render\n   * @fires canvas:cleared\n   * @fires object:added\n   * @fires object:removed\n   */\n\n  fabric.StaticCanvas = fabric.util.createClass(fabric.CommonMethods,\n  /** @lends fabric.StaticCanvas.prototype */\n  {\n    /**\n     * Constructor\n     * @param {HTMLElement | String} el &lt;canvas> element to initialize instance on\n     * @param {Object} [options] Options object\n     * @return {Object} thisArg\n     */\n    initialize: function initialize(el, options) {\n      options || (options = {});\n      this.renderAndResetBound = this.renderAndReset.bind(this);\n      this.requestRenderAllBound = this.requestRenderAll.bind(this);\n\n      this._initStatic(el, options);\n    },\n\n    /**\n     * Background color of canvas instance.\n     * Should be set via {@link fabric.StaticCanvas#setBackgroundColor}.\n     * @type {(String|fabric.Pattern)}\n     * @default\n     */\n    backgroundColor: '',\n\n    /**\n     * Background image of canvas instance.\n     * Should be set via {@link fabric.StaticCanvas#setBackgroundImage}.\n     * <b>Backwards incompatibility note:</b> The \"backgroundImageOpacity\"\n     * and \"backgroundImageStretch\" properties are deprecated since 1.3.9.\n     * Use {@link fabric.Image#opacity}, {@link fabric.Image#width} and {@link fabric.Image#height}.\n     * since 2.4.0 image caching is active, please when putting an image as background, add to the\n     * canvas property a reference to the canvas it is on. Otherwise the image cannot detect the zoom\n     * vale. As an alternative you can disable image objectCaching\n     * @type fabric.Image\n     * @default\n     */\n    backgroundImage: null,\n\n    /**\n     * Overlay color of canvas instance.\n     * Should be set via {@link fabric.StaticCanvas#setOverlayColor}\n     * @since 1.3.9\n     * @type {(String|fabric.Pattern)}\n     * @default\n     */\n    overlayColor: '',\n\n    /**\n     * Overlay image of canvas instance.\n     * Should be set via {@link fabric.StaticCanvas#setOverlayImage}.\n     * <b>Backwards incompatibility note:</b> The \"overlayImageLeft\"\n     * and \"overlayImageTop\" properties are deprecated since 1.3.9.\n     * Use {@link fabric.Image#left} and {@link fabric.Image#top}.\n     * since 2.4.0 image caching is active, please when putting an image as overlay, add to the\n     * canvas property a reference to the canvas it is on. Otherwise the image cannot detect the zoom\n     * vale. As an alternative you can disable image objectCaching\n     * @type fabric.Image\n     * @default\n     */\n    overlayImage: null,\n\n    /**\n     * Indicates whether toObject/toDatalessObject should include default values\n     * if set to false, takes precedence over the object value.\n     * @type Boolean\n     * @default\n     */\n    includeDefaultValues: true,\n\n    /**\n     * Indicates whether objects' state should be saved\n     * @type Boolean\n     * @default\n     */\n    stateful: false,\n\n    /**\n     * Indicates whether {@link fabric.Collection.add}, {@link fabric.Collection.insertAt} and {@link fabric.Collection.remove},\n     * {@link fabric.StaticCanvas.moveTo}, {@link fabric.StaticCanvas.clear} and many more, should also re-render canvas.\n     * Disabling this option will not give a performance boost when adding/removing a lot of objects to/from canvas at once\n     * since the renders are quequed and executed one per frame.\n     * Disabling is suggested anyway and managing the renders of the app manually is not a big effort ( canvas.requestRenderAll() )\n     * Left default to true to do not break documentation and old app, fiddles.\n     * @type Boolean\n     * @default\n     */\n    renderOnAddRemove: true,\n\n    /**\n     * Function that determines clipping of entire canvas area\n     * Being passed context as first argument.\n     * If you are using code minification, ctx argument can be minified/manglied you should use\n     * as a workaround `var ctx = arguments[0];` in the function;\n     * See clipping canvas area in {@link https://github.com/kangax/fabric.js/wiki/FAQ}\n     * @deprecated since 2.0.0\n     * @type Function\n     * @default\n     */\n    clipTo: null,\n\n    /**\n     * Indicates whether object controls (borders/controls) are rendered above overlay image\n     * @type Boolean\n     * @default\n     */\n    controlsAboveOverlay: false,\n\n    /**\n     * Indicates whether the browser can be scrolled when using a touchscreen and dragging on the canvas\n     * @type Boolean\n     * @default\n     */\n    allowTouchScrolling: false,\n\n    /**\n     * Indicates whether this canvas will use image smoothing, this is on by default in browsers\n     * @type Boolean\n     * @default\n     */\n    imageSmoothingEnabled: true,\n\n    /**\n     * The transformation (in the format of Canvas transform) which focuses the viewport\n     * @type Array\n     * @default\n     */\n    viewportTransform: fabric.iMatrix.concat(),\n\n    /**\n     * if set to false background image is not affected by viewport transform\n     * @since 1.6.3\n     * @type Boolean\n     * @default\n     */\n    backgroundVpt: true,\n\n    /**\n     * if set to false overlya image is not affected by viewport transform\n     * @since 1.6.3\n     * @type Boolean\n     * @default\n     */\n    overlayVpt: true,\n\n    /**\n     * Callback; invoked right before object is about to be scaled/rotated\n     * @deprecated since 2.3.0\n     * Use before:transform event\n     */\n    onBeforeScaleRotate: function onBeforeScaleRotate() {\n      /* NOOP */\n    },\n\n    /**\n     * When true, canvas is scaled by devicePixelRatio for better rendering on retina screens\n     * @type Boolean\n     * @default\n     */\n    enableRetinaScaling: true,\n\n    /**\n     * Describe canvas element extension over design\n     * properties are tl,tr,bl,br.\n     * if canvas is not zoomed/panned those points are the four corner of canvas\n     * if canvas is viewportTransformed you those points indicate the extension\n     * of canvas element in plain untrasformed coordinates\n     * The coordinates get updated with @method calcViewportBoundaries.\n     * @memberOf fabric.StaticCanvas.prototype\n     */\n    vptCoords: {},\n\n    /**\n     * Based on vptCoords and object.aCoords, skip rendering of objects that\n     * are not included in current viewport.\n     * May greatly help in applications with crowded canvas and use of zoom/pan\n     * If One of the corner of the bounding box of the object is on the canvas\n     * the objects get rendered.\n     * @memberOf fabric.StaticCanvas.prototype\n     * @type Boolean\n     * @default\n     */\n    skipOffscreen: true,\n\n    /**\n     * a fabricObject that, without stroke define a clipping area with their shape. filled in black\n     * the clipPath object gets used when the canvas has rendered, and the context is placed in the\n     * top left corner of the canvas.\n     * clipPath will clip away controls, if you do not want this to happen use controlsAboveOverlay = true\n     * @type fabric.Object\n     */\n    clipPath: undefined,\n\n    /**\n     * @private\n     * @param {HTMLElement | String} el &lt;canvas> element to initialize instance on\n     * @param {Object} [options] Options object\n     */\n    _initStatic: function _initStatic(el, options) {\n      var cb = this.requestRenderAllBound;\n      this._objects = [];\n\n      this._createLowerCanvas(el);\n\n      this._initOptions(options);\n\n      this._setImageSmoothing(); // only initialize retina scaling once\n\n\n      if (!this.interactive) {\n        this._initRetinaScaling();\n      }\n\n      if (options.overlayImage) {\n        this.setOverlayImage(options.overlayImage, cb);\n      }\n\n      if (options.backgroundImage) {\n        this.setBackgroundImage(options.backgroundImage, cb);\n      }\n\n      if (options.backgroundColor) {\n        this.setBackgroundColor(options.backgroundColor, cb);\n      }\n\n      if (options.overlayColor) {\n        this.setOverlayColor(options.overlayColor, cb);\n      }\n\n      this.calcOffset();\n    },\n\n    /**\n     * @private\n     */\n    _isRetinaScaling: function _isRetinaScaling() {\n      return fabric.devicePixelRatio !== 1 && this.enableRetinaScaling;\n    },\n\n    /**\n     * @private\n     * @return {Number} retinaScaling if applied, otherwise 1;\n     */\n    getRetinaScaling: function getRetinaScaling() {\n      return this._isRetinaScaling() ? fabric.devicePixelRatio : 1;\n    },\n\n    /**\n     * @private\n     */\n    _initRetinaScaling: function _initRetinaScaling() {\n      if (!this._isRetinaScaling()) {\n        return;\n      }\n\n      var scaleRatio = fabric.devicePixelRatio;\n\n      this.__initRetinaScaling(scaleRatio, this.lowerCanvasEl, this.contextContainer);\n\n      if (this.upperCanvasEl) {\n        this.__initRetinaScaling(scaleRatio, this.upperCanvasEl, this.contextTop);\n      }\n    },\n    __initRetinaScaling: function __initRetinaScaling(scaleRatio, canvas, context) {\n      canvas.setAttribute('width', this.width * scaleRatio);\n      canvas.setAttribute('height', this.height * scaleRatio);\n      context.scale(scaleRatio, scaleRatio);\n    },\n\n    /**\n     * Calculates canvas element offset relative to the document\n     * This method is also attached as \"resize\" event handler of window\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    calcOffset: function calcOffset() {\n      this._offset = getElementOffset(this.lowerCanvasEl);\n      return this;\n    },\n\n    /**\n     * Sets {@link fabric.StaticCanvas#overlayImage|overlay image} for this canvas\n     * @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set overlay to\n     * @param {Function} callback callback to invoke when image is loaded and set as an overlay\n     * @param {Object} [options] Optional options to set for the {@link fabric.Image|overlay image}.\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     * @see {@link http://jsfiddle.net/fabricjs/MnzHT/|jsFiddle demo}\n     * @example <caption>Normal overlayImage with left/top = 0</caption>\n     * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {\n     *   // Needed to position overlayImage at 0/0\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>overlayImage with different properties</caption>\n     * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {\n     *   opacity: 0.5,\n     *   angle: 45,\n     *   left: 400,\n     *   top: 400,\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>Stretched overlayImage #1 - width/height correspond to canvas width/height</caption>\n     * fabric.Image.fromURL('http://fabricjs.com/assets/jail_cell_bars.png', function(img) {\n     *    img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'});\n     *    canvas.setOverlayImage(img, canvas.renderAll.bind(canvas));\n     * });\n     * @example <caption>Stretched overlayImage #2 - width/height correspond to canvas width/height</caption>\n     * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {\n     *   width: canvas.width,\n     *   height: canvas.height,\n     *   // Needed to position overlayImage at 0/0\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>overlayImage loaded from cross-origin</caption>\n     * canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {\n     *   opacity: 0.5,\n     *   angle: 45,\n     *   left: 400,\n     *   top: 400,\n     *   originX: 'left',\n     *   originY: 'top',\n     *   crossOrigin: 'anonymous'\n     * });\n     */\n    setOverlayImage: function setOverlayImage(image, callback, options) {\n      return this.__setBgOverlayImage('overlayImage', image, callback, options);\n    },\n\n    /**\n     * Sets {@link fabric.StaticCanvas#backgroundImage|background image} for this canvas\n     * @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set background to\n     * @param {Function} callback Callback to invoke when image is loaded and set as background\n     * @param {Object} [options] Optional options to set for the {@link fabric.Image|background image}.\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     * @see {@link http://jsfiddle.net/djnr8o7a/28/|jsFiddle demo}\n     * @example <caption>Normal backgroundImage with left/top = 0</caption>\n     * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {\n     *   // Needed to position backgroundImage at 0/0\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>backgroundImage with different properties</caption>\n     * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {\n     *   opacity: 0.5,\n     *   angle: 45,\n     *   left: 400,\n     *   top: 400,\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>Stretched backgroundImage #1 - width/height correspond to canvas width/height</caption>\n     * fabric.Image.fromURL('http://fabricjs.com/assets/honey_im_subtle.png', function(img) {\n     *    img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'});\n     *    canvas.setBackgroundImage(img, canvas.renderAll.bind(canvas));\n     * });\n     * @example <caption>Stretched backgroundImage #2 - width/height correspond to canvas width/height</caption>\n     * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {\n     *   width: canvas.width,\n     *   height: canvas.height,\n     *   // Needed to position backgroundImage at 0/0\n     *   originX: 'left',\n     *   originY: 'top'\n     * });\n     * @example <caption>backgroundImage loaded from cross-origin</caption>\n     * canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {\n     *   opacity: 0.5,\n     *   angle: 45,\n     *   left: 400,\n     *   top: 400,\n     *   originX: 'left',\n     *   originY: 'top',\n     *   crossOrigin: 'anonymous'\n     * });\n     */\n    // TODO: fix stretched examples\n    setBackgroundImage: function setBackgroundImage(image, callback, options) {\n      return this.__setBgOverlayImage('backgroundImage', image, callback, options);\n    },\n\n    /**\n     * Sets {@link fabric.StaticCanvas#overlayColor|foreground color} for this canvas\n     * @param {(String|fabric.Pattern)} overlayColor Color or pattern to set foreground color to\n     * @param {Function} callback Callback to invoke when foreground color is set\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     * @see {@link http://jsfiddle.net/fabricjs/pB55h/|jsFiddle demo}\n     * @example <caption>Normal overlayColor - color value</caption>\n     * canvas.setOverlayColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));\n     * @example <caption>fabric.Pattern used as overlayColor</caption>\n     * canvas.setOverlayColor({\n     *   source: 'http://fabricjs.com/assets/escheresque_ste.png'\n     * }, canvas.renderAll.bind(canvas));\n     * @example <caption>fabric.Pattern used as overlayColor with repeat and offset</caption>\n     * canvas.setOverlayColor({\n     *   source: 'http://fabricjs.com/assets/escheresque_ste.png',\n     *   repeat: 'repeat',\n     *   offsetX: 200,\n     *   offsetY: 100\n     * }, canvas.renderAll.bind(canvas));\n     */\n    setOverlayColor: function setOverlayColor(overlayColor, callback) {\n      return this.__setBgOverlayColor('overlayColor', overlayColor, callback);\n    },\n\n    /**\n     * Sets {@link fabric.StaticCanvas#backgroundColor|background color} for this canvas\n     * @param {(String|fabric.Pattern)} backgroundColor Color or pattern to set background color to\n     * @param {Function} callback Callback to invoke when background color is set\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     * @see {@link http://jsfiddle.net/fabricjs/hXzvk/|jsFiddle demo}\n     * @example <caption>Normal backgroundColor - color value</caption>\n     * canvas.setBackgroundColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));\n     * @example <caption>fabric.Pattern used as backgroundColor</caption>\n     * canvas.setBackgroundColor({\n     *   source: 'http://fabricjs.com/assets/escheresque_ste.png'\n     * }, canvas.renderAll.bind(canvas));\n     * @example <caption>fabric.Pattern used as backgroundColor with repeat and offset</caption>\n     * canvas.setBackgroundColor({\n     *   source: 'http://fabricjs.com/assets/escheresque_ste.png',\n     *   repeat: 'repeat',\n     *   offsetX: 200,\n     *   offsetY: 100\n     * }, canvas.renderAll.bind(canvas));\n     */\n    setBackgroundColor: function setBackgroundColor(backgroundColor, callback) {\n      return this.__setBgOverlayColor('backgroundColor', backgroundColor, callback);\n    },\n\n    /**\n     * @private\n     * @see {@link http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-imagesmoothingenabled|WhatWG Canvas Standard}\n     */\n    _setImageSmoothing: function _setImageSmoothing() {\n      var ctx = this.getContext();\n      ctx.imageSmoothingEnabled = ctx.imageSmoothingEnabled || ctx.webkitImageSmoothingEnabled || ctx.mozImageSmoothingEnabled || ctx.msImageSmoothingEnabled || ctx.oImageSmoothingEnabled;\n      ctx.imageSmoothingEnabled = this.imageSmoothingEnabled;\n    },\n\n    /**\n     * @private\n     * @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundImage|backgroundImage}\n     * or {@link fabric.StaticCanvas#overlayImage|overlayImage})\n     * @param {(fabric.Image|String|null)} image fabric.Image instance, URL of an image or null to set background or overlay to\n     * @param {Function} callback Callback to invoke when image is loaded and set as background or overlay\n     * @param {Object} [options] Optional options to set for the {@link fabric.Image|image}.\n     */\n    __setBgOverlayImage: function __setBgOverlayImage(property, image, callback, options) {\n      if (typeof image === 'string') {\n        fabric.util.loadImage(image, function (img) {\n          if (img) {\n            var instance = new fabric.Image(img, options);\n            this[property] = instance;\n            instance.canvas = this;\n          }\n\n          callback && callback(img);\n        }, this, options && options.crossOrigin);\n      } else {\n        options && image.setOptions(options);\n        this[property] = image;\n        image && (image.canvas = this);\n        callback && callback(image);\n      }\n\n      return this;\n    },\n\n    /**\n     * @private\n     * @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundColor|backgroundColor}\n     * or {@link fabric.StaticCanvas#overlayColor|overlayColor})\n     * @param {(Object|String|null)} color Object with pattern information, color value or null\n     * @param {Function} [callback] Callback is invoked when color is set\n     */\n    __setBgOverlayColor: function __setBgOverlayColor(property, color, callback) {\n      this[property] = color;\n\n      this._initGradient(color, property);\n\n      this._initPattern(color, property, callback);\n\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _createCanvasElement: function _createCanvasElement() {\n      var element = createCanvasElement();\n\n      if (!element) {\n        throw CANVAS_INIT_ERROR;\n      }\n\n      if (!element.style) {\n        element.style = {};\n      }\n\n      if (typeof element.getContext === 'undefined') {\n        throw CANVAS_INIT_ERROR;\n      }\n\n      return element;\n    },\n\n    /**\n     * @private\n     * @param {Object} [options] Options object\n     */\n    _initOptions: function _initOptions(options) {\n      var lowerCanvasEl = this.lowerCanvasEl;\n\n      this._setOptions(options);\n\n      this.width = this.width || parseInt(lowerCanvasEl.width, 10) || 0;\n      this.height = this.height || parseInt(lowerCanvasEl.height, 10) || 0;\n\n      if (!this.lowerCanvasEl.style) {\n        return;\n      }\n\n      lowerCanvasEl.width = this.width;\n      lowerCanvasEl.height = this.height;\n      lowerCanvasEl.style.width = this.width + 'px';\n      lowerCanvasEl.style.height = this.height + 'px';\n      this.viewportTransform = this.viewportTransform.slice();\n    },\n\n    /**\n     * Creates a bottom canvas\n     * @private\n     * @param {HTMLElement} [canvasEl]\n     */\n    _createLowerCanvas: function _createLowerCanvas(canvasEl) {\n      // canvasEl === 'HTMLCanvasElement' does not work on jsdom/node\n      if (canvasEl && canvasEl.getContext) {\n        this.lowerCanvasEl = canvasEl;\n      } else {\n        this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement();\n      }\n\n      fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas');\n\n      if (this.interactive) {\n        this._applyCanvasStyle(this.lowerCanvasEl);\n      }\n\n      this.contextContainer = this.lowerCanvasEl.getContext('2d');\n    },\n\n    /**\n     * Returns canvas width (in px)\n     * @return {Number}\n     */\n    getWidth: function getWidth() {\n      return this.width;\n    },\n\n    /**\n     * Returns canvas height (in px)\n     * @return {Number}\n     */\n    getHeight: function getHeight() {\n      return this.height;\n    },\n\n    /**\n     * Sets width of this canvas instance\n     * @param {Number|String} value                         Value to set width to\n     * @param {Object}        [options]                     Options object\n     * @param {Boolean}       [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions\n     * @param {Boolean}       [options.cssOnly=false]       Set the given dimensions only as css dimensions\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    setWidth: function setWidth(value, options) {\n      return this.setDimensions({\n        width: value\n      }, options);\n    },\n\n    /**\n     * Sets height of this canvas instance\n     * @param {Number|String} value                         Value to set height to\n     * @param {Object}        [options]                     Options object\n     * @param {Boolean}       [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions\n     * @param {Boolean}       [options.cssOnly=false]       Set the given dimensions only as css dimensions\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    setHeight: function setHeight(value, options) {\n      return this.setDimensions({\n        height: value\n      }, options);\n    },\n\n    /**\n     * Sets dimensions (width, height) of this canvas instance. when options.cssOnly flag active you should also supply the unit of measure (px/%/em)\n     * @param {Object}        dimensions                    Object with width/height properties\n     * @param {Number|String} [dimensions.width]            Width of canvas element\n     * @param {Number|String} [dimensions.height]           Height of canvas element\n     * @param {Object}        [options]                     Options object\n     * @param {Boolean}       [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions\n     * @param {Boolean}       [options.cssOnly=false]       Set the given dimensions only as css dimensions\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    setDimensions: function setDimensions(dimensions, options) {\n      var cssValue;\n      options = options || {};\n\n      for (var prop in dimensions) {\n        cssValue = dimensions[prop];\n\n        if (!options.cssOnly) {\n          this._setBackstoreDimension(prop, dimensions[prop]);\n\n          cssValue += 'px';\n          this.hasLostContext = true;\n        }\n\n        if (!options.backstoreOnly) {\n          this._setCssDimension(prop, cssValue);\n        }\n      }\n\n      if (this._isCurrentlyDrawing) {\n        this.freeDrawingBrush && this.freeDrawingBrush._setBrushStyles();\n      }\n\n      this._initRetinaScaling();\n\n      this._setImageSmoothing();\n\n      this.calcOffset();\n\n      if (!options.cssOnly) {\n        this.requestRenderAll();\n      }\n\n      return this;\n    },\n\n    /**\n     * Helper for setting width/height\n     * @private\n     * @param {String} prop property (width|height)\n     * @param {Number} value value to set property to\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    _setBackstoreDimension: function _setBackstoreDimension(prop, value) {\n      this.lowerCanvasEl[prop] = value;\n\n      if (this.upperCanvasEl) {\n        this.upperCanvasEl[prop] = value;\n      }\n\n      if (this.cacheCanvasEl) {\n        this.cacheCanvasEl[prop] = value;\n      }\n\n      this[prop] = value;\n      return this;\n    },\n\n    /**\n     * Helper for setting css width/height\n     * @private\n     * @param {String} prop property (width|height)\n     * @param {String} value value to set property to\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    _setCssDimension: function _setCssDimension(prop, value) {\n      this.lowerCanvasEl.style[prop] = value;\n\n      if (this.upperCanvasEl) {\n        this.upperCanvasEl.style[prop] = value;\n      }\n\n      if (this.wrapperEl) {\n        this.wrapperEl.style[prop] = value;\n      }\n\n      return this;\n    },\n\n    /**\n     * Returns canvas zoom level\n     * @return {Number}\n     */\n    getZoom: function getZoom() {\n      return this.viewportTransform[0];\n    },\n\n    /**\n     * Sets viewport transform of this canvas instance\n     * @param {Array} vpt the transform in the form of context.transform\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    setViewportTransform: function setViewportTransform(vpt) {\n      var activeObject = this._activeObject,\n          object,\n          ignoreVpt = false,\n          skipAbsolute = true,\n          i,\n          len;\n      this.viewportTransform = vpt;\n\n      for (i = 0, len = this._objects.length; i < len; i++) {\n        object = this._objects[i];\n        object.group || object.setCoords(ignoreVpt, skipAbsolute);\n      }\n\n      if (activeObject && activeObject.type === 'activeSelection') {\n        activeObject.setCoords(ignoreVpt, skipAbsolute);\n      }\n\n      this.calcViewportBoundaries();\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * Sets zoom level of this canvas instance, zoom centered around point\n     * @param {fabric.Point} point to zoom with respect to\n     * @param {Number} value to set zoom to, less than 1 zooms out\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    zoomToPoint: function zoomToPoint(point, value) {\n      // TODO: just change the scale, preserve other transformations\n      var before = point,\n          vpt = this.viewportTransform.slice(0);\n      point = transformPoint(point, invertTransform(this.viewportTransform));\n      vpt[0] = value;\n      vpt[3] = value;\n      var after = transformPoint(point, vpt);\n      vpt[4] += before.x - after.x;\n      vpt[5] += before.y - after.y;\n      return this.setViewportTransform(vpt);\n    },\n\n    /**\n     * Sets zoom level of this canvas instance\n     * @param {Number} value to set zoom to, less than 1 zooms out\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    setZoom: function setZoom(value) {\n      this.zoomToPoint(new fabric.Point(0, 0), value);\n      return this;\n    },\n\n    /**\n     * Pan viewport so as to place point at top left corner of canvas\n     * @param {fabric.Point} point to move to\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    absolutePan: function absolutePan(point) {\n      var vpt = this.viewportTransform.slice(0);\n      vpt[4] = -point.x;\n      vpt[5] = -point.y;\n      return this.setViewportTransform(vpt);\n    },\n\n    /**\n     * Pans viewpoint relatively\n     * @param {fabric.Point} point (position vector) to move by\n     * @return {fabric.Canvas} instance\n     * @chainable true\n     */\n    relativePan: function relativePan(point) {\n      return this.absolutePan(new fabric.Point(-point.x - this.viewportTransform[4], -point.y - this.viewportTransform[5]));\n    },\n\n    /**\n     * Returns &lt;canvas> element corresponding to this instance\n     * @return {HTMLCanvasElement}\n     */\n    getElement: function getElement() {\n      return this.lowerCanvasEl;\n    },\n\n    /**\n     * @private\n     * @param {fabric.Object} obj Object that was added\n     */\n    _onObjectAdded: function _onObjectAdded(obj) {\n      this.stateful && obj.setupState();\n\n      obj._set('canvas', this);\n\n      obj.setCoords();\n      this.fire('object:added', {\n        target: obj\n      });\n      obj.fire('added');\n    },\n\n    /**\n     * @private\n     * @param {fabric.Object} obj Object that was removed\n     */\n    _onObjectRemoved: function _onObjectRemoved(obj) {\n      this.fire('object:removed', {\n        target: obj\n      });\n      obj.fire('removed');\n      delete obj.canvas;\n    },\n\n    /**\n     * Clears specified context of canvas element\n     * @param {CanvasRenderingContext2D} ctx Context to clear\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    clearContext: function clearContext(ctx) {\n      ctx.clearRect(0, 0, this.width, this.height);\n      return this;\n    },\n\n    /**\n     * Returns context of canvas where objects are drawn\n     * @return {CanvasRenderingContext2D}\n     */\n    getContext: function getContext() {\n      return this.contextContainer;\n    },\n\n    /**\n     * Clears all contexts (background, main, top) of an instance\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    clear: function clear() {\n      this._objects.length = 0;\n      this.backgroundImage = null;\n      this.overlayImage = null;\n      this.backgroundColor = '';\n      this.overlayColor = '';\n\n      if (this._hasITextHandlers) {\n        this.off('mouse:up', this._mouseUpITextHandler);\n        this._iTextInstances = null;\n        this._hasITextHandlers = false;\n      }\n\n      this.clearContext(this.contextContainer);\n      this.fire('canvas:cleared');\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * Renders the canvas\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    renderAll: function renderAll() {\n      var canvasToDrawOn = this.contextContainer;\n      this.renderCanvas(canvasToDrawOn, this._objects);\n      return this;\n    },\n\n    /**\n     * Function created to be instance bound at initialization\n     * used in requestAnimationFrame rendering\n     * Let the fabricJS call it. If you call it manually you could have more\n     * animationFrame stacking on to of each other\n     * for an imperative rendering, use canvas.renderAll\n     * @private\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    renderAndReset: function renderAndReset() {\n      this.isRendering = 0;\n      this.renderAll();\n    },\n\n    /**\n     * Append a renderAll request to next animation frame.\n     * unless one is already in progress, in that case nothing is done\n     * a boolean flag will avoid appending more.\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    requestRenderAll: function requestRenderAll() {\n      if (!this.isRendering) {\n        this.isRendering = fabric.util.requestAnimFrame(this.renderAndResetBound);\n      }\n\n      return this;\n    },\n\n    /**\n     * Calculate the position of the 4 corner of canvas with current viewportTransform.\n     * helps to determinate when an object is in the current rendering viewport using\n     * object absolute coordinates ( aCoords )\n     * @return {Object} points.tl\n     * @chainable\n     */\n    calcViewportBoundaries: function calcViewportBoundaries() {\n      var points = {},\n          width = this.width,\n          height = this.height,\n          iVpt = invertTransform(this.viewportTransform);\n      points.tl = transformPoint({\n        x: 0,\n        y: 0\n      }, iVpt);\n      points.br = transformPoint({\n        x: width,\n        y: height\n      }, iVpt);\n      points.tr = new fabric.Point(points.br.x, points.tl.y);\n      points.bl = new fabric.Point(points.tl.x, points.br.y);\n      this.vptCoords = points;\n      return points;\n    },\n    cancelRequestedRender: function cancelRequestedRender() {\n      if (this.isRendering) {\n        fabric.util.cancelAnimFrame(this.isRendering);\n        this.isRendering = 0;\n      }\n    },\n\n    /**\n     * Renders background, objects, overlay and controls.\n     * @param {CanvasRenderingContext2D} ctx\n     * @param {Array} objects to render\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    renderCanvas: function renderCanvas(ctx, objects) {\n      var v = this.viewportTransform,\n          path = this.clipPath;\n      this.cancelRequestedRender();\n      this.calcViewportBoundaries();\n      this.clearContext(ctx);\n      this.fire('before:render', {\n        ctx: ctx\n      });\n\n      if (this.clipTo) {\n        fabric.util.clipContext(this, ctx);\n      }\n\n      this._renderBackground(ctx);\n\n      ctx.save(); //apply viewport transform once for all rendering process\n\n      ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);\n\n      this._renderObjects(ctx, objects);\n\n      ctx.restore();\n\n      if (!this.controlsAboveOverlay && this.interactive) {\n        this.drawControls(ctx);\n      }\n\n      if (this.clipTo) {\n        ctx.restore();\n      }\n\n      if (path) {\n        path.canvas = this; // needed to setup a couple of variables\n\n        path.shouldCache();\n        path._transformDone = true;\n        path.renderCache({\n          forClipping: true\n        });\n        this.drawClipPathOnCanvas(ctx);\n      }\n\n      this._renderOverlay(ctx);\n\n      if (this.controlsAboveOverlay && this.interactive) {\n        this.drawControls(ctx);\n      }\n\n      this.fire('after:render', {\n        ctx: ctx\n      });\n    },\n\n    /**\n     * Paint the cached clipPath on the lowerCanvasEl\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    drawClipPathOnCanvas: function drawClipPathOnCanvas(ctx) {\n      var v = this.viewportTransform,\n          path = this.clipPath;\n      ctx.save();\n      ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]); // DEBUG: uncomment this line, comment the following\n      // ctx.globalAlpha = 0.4;\n\n      ctx.globalCompositeOperation = 'destination-in';\n      path.transform(ctx);\n      ctx.scale(1 / path.zoomX, 1 / path.zoomY);\n      ctx.drawImage(path._cacheCanvas, -path.cacheTranslationX, -path.cacheTranslationY);\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Array} objects to render\n     */\n    _renderObjects: function _renderObjects(ctx, objects) {\n      var i, len;\n\n      for (i = 0, len = objects.length; i < len; ++i) {\n        objects[i] && objects[i].render(ctx);\n      }\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {string} property 'background' or 'overlay'\n     */\n    _renderBackgroundOrOverlay: function _renderBackgroundOrOverlay(ctx, property) {\n      var fill = this[property + 'Color'],\n          object = this[property + 'Image'],\n          v = this.viewportTransform,\n          needsVpt = this[property + 'Vpt'];\n\n      if (!fill && !object) {\n        return;\n      }\n\n      if (fill) {\n        ctx.save();\n        ctx.beginPath();\n        ctx.moveTo(0, 0);\n        ctx.lineTo(this.width, 0);\n        ctx.lineTo(this.width, this.height);\n        ctx.lineTo(0, this.height);\n        ctx.closePath();\n        ctx.fillStyle = fill.toLive ? fill.toLive(ctx, this) : fill;\n\n        if (needsVpt) {\n          ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);\n        }\n\n        ctx.transform(1, 0, 0, 1, fill.offsetX || 0, fill.offsetY || 0);\n        var m = fill.gradientTransform || fill.patternTransform;\n        m && ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);\n        ctx.fill();\n        ctx.restore();\n      }\n\n      if (object) {\n        ctx.save();\n\n        if (needsVpt) {\n          ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);\n        }\n\n        object.render(ctx);\n        ctx.restore();\n      }\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderBackground: function _renderBackground(ctx) {\n      this._renderBackgroundOrOverlay(ctx, 'background');\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderOverlay: function _renderOverlay(ctx) {\n      this._renderBackgroundOrOverlay(ctx, 'overlay');\n    },\n\n    /**\n     * Returns coordinates of a center of canvas.\n     * Returned value is an object with top and left properties\n     * @return {Object} object with \"top\" and \"left\" number values\n     */\n    getCenter: function getCenter() {\n      return {\n        top: this.height / 2,\n        left: this.width / 2\n      };\n    },\n\n    /**\n     * Centers object horizontally in the canvas\n     * @param {fabric.Object} object Object to center horizontally\n     * @return {fabric.Canvas} thisArg\n     */\n    centerObjectH: function centerObjectH(object) {\n      return this._centerObject(object, new fabric.Point(this.getCenter().left, object.getCenterPoint().y));\n    },\n\n    /**\n     * Centers object vertically in the canvas\n     * @param {fabric.Object} object Object to center vertically\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    centerObjectV: function centerObjectV(object) {\n      return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, this.getCenter().top));\n    },\n\n    /**\n     * Centers object vertically and horizontally in the canvas\n     * @param {fabric.Object} object Object to center vertically and horizontally\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    centerObject: function centerObject(object) {\n      var center = this.getCenter();\n      return this._centerObject(object, new fabric.Point(center.left, center.top));\n    },\n\n    /**\n     * Centers object vertically and horizontally in the viewport\n     * @param {fabric.Object} object Object to center vertically and horizontally\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    viewportCenterObject: function viewportCenterObject(object) {\n      var vpCenter = this.getVpCenter();\n      return this._centerObject(object, vpCenter);\n    },\n\n    /**\n     * Centers object horizontally in the viewport, object.top is unchanged\n     * @param {fabric.Object} object Object to center vertically and horizontally\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    viewportCenterObjectH: function viewportCenterObjectH(object) {\n      var vpCenter = this.getVpCenter();\n\n      this._centerObject(object, new fabric.Point(vpCenter.x, object.getCenterPoint().y));\n\n      return this;\n    },\n\n    /**\n     * Centers object Vertically in the viewport, object.top is unchanged\n     * @param {fabric.Object} object Object to center vertically and horizontally\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    viewportCenterObjectV: function viewportCenterObjectV(object) {\n      var vpCenter = this.getVpCenter();\n      return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, vpCenter.y));\n    },\n\n    /**\n     * Calculate the point in canvas that correspond to the center of actual viewport.\n     * @return {fabric.Point} vpCenter, viewport center\n     * @chainable\n     */\n    getVpCenter: function getVpCenter() {\n      var center = this.getCenter(),\n          iVpt = invertTransform(this.viewportTransform);\n      return transformPoint({\n        x: center.left,\n        y: center.top\n      }, iVpt);\n    },\n\n    /**\n     * @private\n     * @param {fabric.Object} object Object to center\n     * @param {fabric.Point} center Center point\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    _centerObject: function _centerObject(object, center) {\n      object.setPositionByOrigin(center, 'center', 'center');\n      object.setCoords();\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * Returs dataless JSON representation of canvas\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {String} json string\n     */\n    toDatalessJSON: function toDatalessJSON(propertiesToInclude) {\n      return this.toDatalessObject(propertiesToInclude);\n    },\n\n    /**\n     * Returns object representation of canvas\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return this._toObjectMethod('toObject', propertiesToInclude);\n    },\n\n    /**\n     * Returns dataless object representation of canvas\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toDatalessObject: function toDatalessObject(propertiesToInclude) {\n      return this._toObjectMethod('toDatalessObject', propertiesToInclude);\n    },\n\n    /**\n     * @private\n     */\n    _toObjectMethod: function _toObjectMethod(methodName, propertiesToInclude) {\n      var clipPath = this.clipPath,\n          data = {\n        version: fabric.version,\n        objects: this._toObjects(methodName, propertiesToInclude)\n      };\n\n      if (clipPath) {\n        data.clipPath = this._toObject(this.clipPath, methodName, propertiesToInclude);\n      }\n\n      extend(data, this.__serializeBgOverlay(methodName, propertiesToInclude));\n      fabric.util.populateWithProperties(this, data, propertiesToInclude);\n      return data;\n    },\n\n    /**\n     * @private\n     */\n    _toObjects: function _toObjects(methodName, propertiesToInclude) {\n      return this._objects.filter(function (object) {\n        return !object.excludeFromExport;\n      }).map(function (instance) {\n        return this._toObject(instance, methodName, propertiesToInclude);\n      }, this);\n    },\n\n    /**\n     * @private\n     */\n    _toObject: function _toObject(instance, methodName, propertiesToInclude) {\n      var originalValue;\n\n      if (!this.includeDefaultValues) {\n        originalValue = instance.includeDefaultValues;\n        instance.includeDefaultValues = false;\n      }\n\n      var object = instance[methodName](propertiesToInclude);\n\n      if (!this.includeDefaultValues) {\n        instance.includeDefaultValues = originalValue;\n      }\n\n      return object;\n    },\n\n    /**\n     * @private\n     */\n    __serializeBgOverlay: function __serializeBgOverlay(methodName, propertiesToInclude) {\n      var data = {},\n          bgImage = this.backgroundImage,\n          overlay = this.overlayImage;\n\n      if (this.backgroundColor) {\n        data.background = this.backgroundColor.toObject ? this.backgroundColor.toObject(propertiesToInclude) : this.backgroundColor;\n      }\n\n      if (this.overlayColor) {\n        data.overlay = this.overlayColor.toObject ? this.overlayColor.toObject(propertiesToInclude) : this.overlayColor;\n      }\n\n      if (bgImage && !bgImage.excludeFromExport) {\n        data.backgroundImage = this._toObject(bgImage, methodName, propertiesToInclude);\n      }\n\n      if (overlay && !overlay.excludeFromExport) {\n        data.overlayImage = this._toObject(overlay, methodName, propertiesToInclude);\n      }\n\n      return data;\n    },\n\n    /**\n     * Moves an object or the objects of a multiple selection\n     * to the bottom of the stack of drawn objects\n     * @param {fabric.Object} object Object to send to back\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    sendToBack: function sendToBack(object) {\n      if (!object) {\n        return this;\n      }\n\n      var activeSelection = this._activeObject,\n          i,\n          obj,\n          objs;\n\n      if (object === activeSelection && object.type === 'activeSelection') {\n        objs = activeSelection._objects;\n\n        for (i = objs.length; i--;) {\n          obj = objs[i];\n          removeFromArray(this._objects, obj);\n\n          this._objects.unshift(obj);\n        }\n      } else {\n        removeFromArray(this._objects, object);\n\n        this._objects.unshift(object);\n      }\n\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * Moves an object or the objects of a multiple selection\n     * to the top of the stack of drawn objects\n     * @param {fabric.Object} object Object to send\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    bringToFront: function bringToFront(object) {\n      if (!object) {\n        return this;\n      }\n\n      var activeSelection = this._activeObject,\n          i,\n          obj,\n          objs;\n\n      if (object === activeSelection && object.type === 'activeSelection') {\n        objs = activeSelection._objects;\n\n        for (i = 0; i < objs.length; i++) {\n          obj = objs[i];\n          removeFromArray(this._objects, obj);\n\n          this._objects.push(obj);\n        }\n      } else {\n        removeFromArray(this._objects, object);\n\n        this._objects.push(object);\n      }\n\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * Moves an object or a selection down in stack of drawn objects\n     * An optional paramter, intersecting allowes to move the object in behind\n     * the first intersecting object. Where intersection is calculated with\n     * bounding box. If no intersection is found, there will not be change in the\n     * stack.\n     * @param {fabric.Object} object Object to send\n     * @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    sendBackwards: function sendBackwards(object, intersecting) {\n      if (!object) {\n        return this;\n      }\n\n      var activeSelection = this._activeObject,\n          i,\n          obj,\n          idx,\n          newIdx,\n          objs,\n          objsMoved = 0;\n\n      if (object === activeSelection && object.type === 'activeSelection') {\n        objs = activeSelection._objects;\n\n        for (i = 0; i < objs.length; i++) {\n          obj = objs[i];\n          idx = this._objects.indexOf(obj);\n\n          if (idx > 0 + objsMoved) {\n            newIdx = idx - 1;\n            removeFromArray(this._objects, obj);\n\n            this._objects.splice(newIdx, 0, obj);\n          }\n\n          objsMoved++;\n        }\n      } else {\n        idx = this._objects.indexOf(object);\n\n        if (idx !== 0) {\n          // if object is not on the bottom of stack\n          newIdx = this._findNewLowerIndex(object, idx, intersecting);\n          removeFromArray(this._objects, object);\n\n          this._objects.splice(newIdx, 0, object);\n        }\n      }\n\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _findNewLowerIndex: function _findNewLowerIndex(object, idx, intersecting) {\n      var newIdx, i;\n\n      if (intersecting) {\n        newIdx = idx; // traverse down the stack looking for the nearest intersecting object\n\n        for (i = idx - 1; i >= 0; --i) {\n          var isIntersecting = object.intersectsWithObject(this._objects[i]) || object.isContainedWithinObject(this._objects[i]) || this._objects[i].isContainedWithinObject(object);\n\n          if (isIntersecting) {\n            newIdx = i;\n            break;\n          }\n        }\n      } else {\n        newIdx = idx - 1;\n      }\n\n      return newIdx;\n    },\n\n    /**\n     * Moves an object or a selection up in stack of drawn objects\n     * An optional paramter, intersecting allowes to move the object in front\n     * of the first intersecting object. Where intersection is calculated with\n     * bounding box. If no intersection is found, there will not be change in the\n     * stack.\n     * @param {fabric.Object} object Object to send\n     * @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    bringForward: function bringForward(object, intersecting) {\n      if (!object) {\n        return this;\n      }\n\n      var activeSelection = this._activeObject,\n          i,\n          obj,\n          idx,\n          newIdx,\n          objs,\n          objsMoved = 0;\n\n      if (object === activeSelection && object.type === 'activeSelection') {\n        objs = activeSelection._objects;\n\n        for (i = objs.length; i--;) {\n          obj = objs[i];\n          idx = this._objects.indexOf(obj);\n\n          if (idx < this._objects.length - 1 - objsMoved) {\n            newIdx = idx + 1;\n            removeFromArray(this._objects, obj);\n\n            this._objects.splice(newIdx, 0, obj);\n          }\n\n          objsMoved++;\n        }\n      } else {\n        idx = this._objects.indexOf(object);\n\n        if (idx !== this._objects.length - 1) {\n          // if object is not on top of stack (last item in an array)\n          newIdx = this._findNewUpperIndex(object, idx, intersecting);\n          removeFromArray(this._objects, object);\n\n          this._objects.splice(newIdx, 0, object);\n        }\n      }\n\n      this.renderOnAddRemove && this.requestRenderAll();\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _findNewUpperIndex: function _findNewUpperIndex(object, idx, intersecting) {\n      var newIdx, i, len;\n\n      if (intersecting) {\n        newIdx = idx; // traverse up the stack looking for the nearest intersecting object\n\n        for (i = idx + 1, len = this._objects.length; i < len; ++i) {\n          var isIntersecting = object.intersectsWithObject(this._objects[i]) || object.isContainedWithinObject(this._objects[i]) || this._objects[i].isContainedWithinObject(object);\n\n          if (isIntersecting) {\n            newIdx = i;\n            break;\n          }\n        }\n      } else {\n        newIdx = idx + 1;\n      }\n\n      return newIdx;\n    },\n\n    /**\n     * Moves an object to specified level in stack of drawn objects\n     * @param {fabric.Object} object Object to send\n     * @param {Number} index Position to move to\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    moveTo: function moveTo(object, index) {\n      removeFromArray(this._objects, object);\n\n      this._objects.splice(index, 0, object);\n\n      return this.renderOnAddRemove && this.requestRenderAll();\n    },\n\n    /**\n     * Clears a canvas element and dispose objects\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    dispose: function dispose() {\n      // cancel eventually ongoing renders\n      if (this.isRendering) {\n        fabric.util.cancelAnimFrame(this.isRendering);\n        this.isRendering = 0;\n      }\n\n      this.forEachObject(function (object) {\n        object.dispose && object.dispose();\n      });\n      this._objects = [];\n\n      if (this.backgroundImage && this.backgroundImage.dispose) {\n        this.backgroundImage.dispose();\n      }\n\n      this.backgroundImage = null;\n\n      if (this.overlayImage && this.overlayImage.dispose) {\n        this.overlayImage.dispose();\n      }\n\n      this.overlayImage = null;\n      this._iTextInstances = null;\n      this.contextContainer = null;\n      fabric.util.cleanUpJsdomNode(this.lowerCanvasEl);\n      this.lowerCanvasEl = undefined;\n      return this;\n    },\n\n    /**\n     * Returns a string representation of an instance\n     * @return {String} string representation of an instance\n     */\n    toString: function toString() {\n      return '#<fabric.Canvas (' + this.complexity() + '): ' + '{ objects: ' + this._objects.length + ' }>';\n    }\n  });\n  extend(fabric.StaticCanvas.prototype, fabric.Observable);\n  extend(fabric.StaticCanvas.prototype, fabric.Collection);\n  extend(fabric.StaticCanvas.prototype, fabric.DataURLExporter);\n  extend(fabric.StaticCanvas,\n  /** @lends fabric.StaticCanvas */\n  {\n    /**\n     * @static\n     * @type String\n     * @default\n     */\n    EMPTY_JSON: '{\"objects\": [], \"background\": \"white\"}',\n\n    /**\n     * Provides a way to check support of some of the canvas methods\n     * (either those of HTMLCanvasElement itself, or rendering context)\n     *\n     * @param {String} methodName Method to check support for;\n     *                            Could be one of \"setLineDash\"\n     * @return {Boolean | null} `true` if method is supported (or at least exists),\n     *                          `null` if canvas element or context can not be initialized\n     */\n    supports: function supports(methodName) {\n      var el = createCanvasElement();\n\n      if (!el || !el.getContext) {\n        return null;\n      }\n\n      var ctx = el.getContext('2d');\n\n      if (!ctx) {\n        return null;\n      }\n\n      switch (methodName) {\n        case 'setLineDash':\n          return typeof ctx.setLineDash !== 'undefined';\n\n        default:\n          return null;\n      }\n    }\n  });\n  /**\n   * Returns JSON representation of canvas\n   * @function\n   * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n   * @return {String} JSON string\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#serialization}\n   * @see {@link http://jsfiddle.net/fabricjs/pec86/|jsFiddle demo}\n   * @example <caption>JSON without additional properties</caption>\n   * var json = canvas.toJSON();\n   * @example <caption>JSON with additional properties included</caption>\n   * var json = canvas.toJSON(['lockMovementX', 'lockMovementY', 'lockRotation', 'lockScalingX', 'lockScalingY', 'lockUniScaling']);\n   * @example <caption>JSON without default values</caption>\n   * canvas.includeDefaultValues = false;\n   * var json = canvas.toJSON();\n   */\n\n  fabric.StaticCanvas.prototype.toJSON = fabric.StaticCanvas.prototype.toObject;\n\n  if (fabric.isLikelyNode) {\n    fabric.StaticCanvas.prototype.createPNGStream = function () {\n      var impl = getNodeCanvas(this.lowerCanvasEl);\n      return impl && impl.createPNGStream();\n    };\n\n    fabric.StaticCanvas.prototype.createJPEGStream = function (opts) {\n      var impl = getNodeCanvas(this.lowerCanvasEl);\n      return impl && impl.createJPEGStream(opts);\n    };\n  }\n})();\n\n(function () {\n  var _getPointer = fabric.util.getPointer,\n      degreesToRadians = fabric.util.degreesToRadians,\n      radiansToDegrees = fabric.util.radiansToDegrees,\n      atan2 = Math.atan2,\n      abs = Math.abs,\n      supportLineDash = fabric.StaticCanvas.supports('setLineDash'),\n      STROKE_OFFSET = 0.5;\n  /**\n   * Canvas class\n   * @class fabric.Canvas\n   * @extends fabric.StaticCanvas\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#canvas}\n   * @see {@link fabric.Canvas#initialize} for constructor definition\n   *\n   * @fires object:modified at the end of a transform or any change when statefull is true\n   * @fires object:rotated at the end of a rotation transform\n   * @fires object:scaled at the end of a scale transform\n   * @fires object:moved at the end of translation transform\n   * @fires object:skewed at the end of a skew transform\n   * @fires object:rotating while an object is being rotated from the control\n   * @fires object:scaling while an object is being scaled by controls\n   * @fires object:moving while an object is being dragged\n   * @fires object:skewing while an object is being skewed from the controls\n   * @fires object:selected this event is deprecated. use selection:created\n   *\n   * @fires before:transform before a transform is is started\n   * @fires before:selection:cleared\n   * @fires selection:cleared\n   * @fires selection:updated\n   * @fires selection:created\n   *\n   * @fires path:created after a drawing operation ends and the path is added\n   * @fires mouse:down\n   * @fires mouse:move\n   * @fires mouse:up\n   * @fires mouse:down:before  on mouse down, before the inner fabric logic runs\n   * @fires mouse:move:before on mouse move, before the inner fabric logic runs\n   * @fires mouse:up:before on mouse up, before the inner fabric logic runs\n   * @fires mouse:over\n   * @fires mouse:out\n   * @fires mouse:dblclick whenever a native dbl click event fires on the canvas.\n   *\n   * @fires dragover\n   * @fires dragenter\n   * @fires dragleave\n   * @fires drop\n   * @fires after:render at the end of the render process, receives the context in the callback\n   * @fires before:render at start the render process, receives the context in the callback\n   *\n   */\n\n  fabric.Canvas = fabric.util.createClass(fabric.StaticCanvas,\n  /** @lends fabric.Canvas.prototype */\n  {\n    /**\n     * Constructor\n     * @param {HTMLElement | String} el &lt;canvas> element to initialize instance on\n     * @param {Object} [options] Options object\n     * @return {Object} thisArg\n     */\n    initialize: function initialize(el, options) {\n      options || (options = {});\n      this.renderAndResetBound = this.renderAndReset.bind(this);\n      this.requestRenderAllBound = this.requestRenderAll.bind(this);\n\n      this._initStatic(el, options);\n\n      this._initInteractive();\n\n      this._createCacheCanvas();\n    },\n\n    /**\n     * When true, objects can be transformed by one side (unproportionally)\n     * @type Boolean\n     * @default\n     */\n    uniScaleTransform: false,\n\n    /**\n     * Indicates which key enable unproportional scaling\n     * values: 'altKey', 'shiftKey', 'ctrlKey'.\n     * If `null` or 'none' or any other string that is not a modifier key\n     * feature is disabled feature disabled.\n     * @since 1.6.2\n     * @type String\n     * @default\n     */\n    uniScaleKey: 'shiftKey',\n\n    /**\n     * When true, objects use center point as the origin of scale transformation.\n     * <b>Backwards incompatibility note:</b> This property replaces \"centerTransform\" (Boolean).\n     * @since 1.3.4\n     * @type Boolean\n     * @default\n     */\n    centeredScaling: false,\n\n    /**\n     * When true, objects use center point as the origin of rotate transformation.\n     * <b>Backwards incompatibility note:</b> This property replaces \"centerTransform\" (Boolean).\n     * @since 1.3.4\n     * @type Boolean\n     * @default\n     */\n    centeredRotation: false,\n\n    /**\n     * Indicates which key enable centered Transform\n     * values: 'altKey', 'shiftKey', 'ctrlKey'.\n     * If `null` or 'none' or any other string that is not a modifier key\n     * feature is disabled feature disabled.\n     * @since 1.6.2\n     * @type String\n     * @default\n     */\n    centeredKey: 'altKey',\n\n    /**\n     * Indicates which key enable alternate action on corner\n     * values: 'altKey', 'shiftKey', 'ctrlKey'.\n     * If `null` or 'none' or any other string that is not a modifier key\n     * feature is disabled feature disabled.\n     * @since 1.6.2\n     * @type String\n     * @default\n     */\n    altActionKey: 'shiftKey',\n\n    /**\n     * Indicates that canvas is interactive. This property should not be changed.\n     * @type Boolean\n     * @default\n     */\n    interactive: true,\n\n    /**\n     * Indicates whether group selection should be enabled\n     * @type Boolean\n     * @default\n     */\n    selection: true,\n\n    /**\n     * Indicates which key or keys enable multiple click selection\n     * Pass value as a string or array of strings\n     * values: 'altKey', 'shiftKey', 'ctrlKey'.\n     * If `null` or empty or containing any other string that is not a modifier key\n     * feature is disabled.\n     * @since 1.6.2\n     * @type String|Array\n     * @default\n     */\n    selectionKey: 'shiftKey',\n\n    /**\n     * Indicates which key enable alternative selection\n     * in case of target overlapping with active object\n     * values: 'altKey', 'shiftKey', 'ctrlKey'.\n     * For a series of reason that come from the general expectations on how\n     * things should work, this feature works only for preserveObjectStacking true.\n     * If `null` or 'none' or any other string that is not a modifier key\n     * feature is disabled.\n     * @since 1.6.5\n     * @type null|String\n     * @default\n     */\n    altSelectionKey: null,\n\n    /**\n     * Color of selection\n     * @type String\n     * @default\n     */\n    selectionColor: 'rgba(100, 100, 255, 0.3)',\n    // blue\n\n    /**\n     * Default dash array pattern\n     * If not empty the selection border is dashed\n     * @type Array\n     */\n    selectionDashArray: [],\n\n    /**\n     * Color of the border of selection (usually slightly darker than color of selection itself)\n     * @type String\n     * @default\n     */\n    selectionBorderColor: 'rgba(255, 255, 255, 0.3)',\n\n    /**\n     * Width of a line used in object/group selection\n     * @type Number\n     * @default\n     */\n    selectionLineWidth: 1,\n\n    /**\n     * Select only shapes that are fully contained in the dragged selection rectangle.\n     * @type Boolean\n     * @default\n     */\n    selectionFullyContained: false,\n\n    /**\n     * Default cursor value used when hovering over an object on canvas\n     * @type String\n     * @default\n     */\n    hoverCursor: 'move',\n\n    /**\n     * Default cursor value used when moving an object on canvas\n     * @type String\n     * @default\n     */\n    moveCursor: 'move',\n\n    /**\n     * Default cursor value used for the entire canvas\n     * @type String\n     * @default\n     */\n    defaultCursor: 'default',\n\n    /**\n     * Cursor value used during free drawing\n     * @type String\n     * @default\n     */\n    freeDrawingCursor: 'crosshair',\n\n    /**\n     * Cursor value used for rotation point\n     * @type String\n     * @default\n     */\n    rotationCursor: 'crosshair',\n\n    /**\n     * Cursor value used for disabled elements ( corners with disabled action )\n     * @type String\n     * @since 2.0.0\n     * @default\n     */\n    notAllowedCursor: 'not-allowed',\n\n    /**\n     * Default element class that's given to wrapper (div) element of canvas\n     * @type String\n     * @default\n     */\n    containerClass: 'canvas-container',\n\n    /**\n     * When true, object detection happens on per-pixel basis rather than on per-bounding-box\n     * @type Boolean\n     * @default\n     */\n    perPixelTargetFind: false,\n\n    /**\n     * Number of pixels around target pixel to tolerate (consider active) during object detection\n     * @type Number\n     * @default\n     */\n    targetFindTolerance: 0,\n\n    /**\n     * When true, target detection is skipped when hovering over canvas. This can be used to improve performance.\n     * @type Boolean\n     * @default\n     */\n    skipTargetFind: false,\n\n    /**\n     * When true, mouse events on canvas (mousedown/mousemove/mouseup) result in free drawing.\n     * After mousedown, mousemove creates a shape,\n     * and then mouseup finalizes it and adds an instance of `fabric.Path` onto canvas.\n     * @tutorial {@link http://fabricjs.com/fabric-intro-part-4#free_drawing}\n     * @type Boolean\n     * @default\n     */\n    isDrawingMode: false,\n\n    /**\n     * Indicates whether objects should remain in current stack position when selected.\n     * When false objects are brought to top and rendered as part of the selection group\n     * @type Boolean\n     * @default\n     */\n    preserveObjectStacking: false,\n\n    /**\n     * Indicates the angle that an object will lock to while rotating.\n     * @type Number\n     * @since 1.6.7\n     * @default\n     */\n    snapAngle: 0,\n\n    /**\n     * Indicates the distance from the snapAngle the rotation will lock to the snapAngle.\n     * When `null`, the snapThreshold will default to the snapAngle.\n     * @type null|Number\n     * @since 1.6.7\n     * @default\n     */\n    snapThreshold: null,\n\n    /**\n     * Indicates if the right click on canvas can output the context menu or not\n     * @type Boolean\n     * @since 1.6.5\n     * @default\n     */\n    stopContextMenu: false,\n\n    /**\n     * Indicates if the canvas can fire right click events\n     * @type Boolean\n     * @since 1.6.5\n     * @default\n     */\n    fireRightClick: false,\n\n    /**\n     * Indicates if the canvas can fire middle click events\n     * @type Boolean\n     * @since 1.7.8\n     * @default\n     */\n    fireMiddleClick: false,\n\n    /**\n     * Keep track of the subTargets for Mouse Events\n     * @type fabric.Object[]\n     */\n    targets: [],\n\n    /**\n     * Keep track of the hovered target\n     * @type fabric.Object\n     * @private\n     */\n    _hoveredTarget: null,\n\n    /**\n     * hold the list of nested targets hovered\n     * @type fabric.Object[]\n     * @private\n     */\n    _hoveredTargets: [],\n\n    /**\n     * @private\n     */\n    _initInteractive: function _initInteractive() {\n      this._currentTransform = null;\n      this._groupSelector = null;\n\n      this._initWrapperElement();\n\n      this._createUpperCanvas();\n\n      this._initEventListeners();\n\n      this._initRetinaScaling();\n\n      this.freeDrawingBrush = fabric.PencilBrush && new fabric.PencilBrush(this);\n      this.calcOffset();\n    },\n\n    /**\n     * Divides objects in two groups, one to render immediately\n     * and one to render as activeGroup.\n     * @return {Array} objects to render immediately and pushes the other in the activeGroup.\n     */\n    _chooseObjectsToRender: function _chooseObjectsToRender() {\n      var activeObjects = this.getActiveObjects(),\n          object,\n          objsToRender,\n          activeGroupObjects;\n\n      if (activeObjects.length > 0 && !this.preserveObjectStacking) {\n        objsToRender = [];\n        activeGroupObjects = [];\n\n        for (var i = 0, length = this._objects.length; i < length; i++) {\n          object = this._objects[i];\n\n          if (activeObjects.indexOf(object) === -1) {\n            objsToRender.push(object);\n          } else {\n            activeGroupObjects.push(object);\n          }\n        }\n\n        if (activeObjects.length > 1) {\n          this._activeObject._objects = activeGroupObjects;\n        }\n\n        objsToRender.push.apply(objsToRender, activeGroupObjects);\n      } else {\n        objsToRender = this._objects;\n      }\n\n      return objsToRender;\n    },\n\n    /**\n     * Renders both the top canvas and the secondary container canvas.\n     * @return {fabric.Canvas} instance\n     * @chainable\n     */\n    renderAll: function renderAll() {\n      if (this.contextTopDirty && !this._groupSelector && !this.isDrawingMode) {\n        this.clearContext(this.contextTop);\n        this.contextTopDirty = false;\n      }\n\n      if (this.hasLostContext) {\n        this.renderTopLayer(this.contextTop);\n      }\n\n      var canvasToDrawOn = this.contextContainer;\n      this.renderCanvas(canvasToDrawOn, this._chooseObjectsToRender());\n      return this;\n    },\n    renderTopLayer: function renderTopLayer(ctx) {\n      ctx.save();\n\n      if (this.isDrawingMode && this._isCurrentlyDrawing) {\n        this.freeDrawingBrush && this.freeDrawingBrush._render();\n        this.contextTopDirty = true;\n      } // we render the top context - last object\n\n\n      if (this.selection && this._groupSelector) {\n        this._drawSelection(ctx);\n\n        this.contextTopDirty = true;\n      }\n\n      ctx.restore();\n    },\n\n    /**\n     * Method to render only the top canvas.\n     * Also used to render the group selection box.\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    renderTop: function renderTop() {\n      var ctx = this.contextTop;\n      this.clearContext(ctx);\n      this.renderTopLayer(ctx);\n      this.fire('after:render');\n      return this;\n    },\n\n    /**\n     * Resets the current transform to its original values and chooses the type of resizing based on the event\n     * @private\n     */\n    _resetCurrentTransform: function _resetCurrentTransform() {\n      var t = this._currentTransform;\n      t.target.set({\n        scaleX: t.original.scaleX,\n        scaleY: t.original.scaleY,\n        skewX: t.original.skewX,\n        skewY: t.original.skewY,\n        left: t.original.left,\n        top: t.original.top\n      });\n\n      if (this._shouldCenterTransform(t.target)) {\n        if (t.originX !== 'center') {\n          if (t.originX === 'right') {\n            t.mouseXSign = -1;\n          } else {\n            t.mouseXSign = 1;\n          }\n        }\n\n        if (t.originY !== 'center') {\n          if (t.originY === 'bottom') {\n            t.mouseYSign = -1;\n          } else {\n            t.mouseYSign = 1;\n          }\n        }\n\n        t.originX = 'center';\n        t.originY = 'center';\n      } else {\n        t.originX = t.original.originX;\n        t.originY = t.original.originY;\n      }\n    },\n\n    /**\n     * Checks if point is contained within an area of given object\n     * @param {Event} e Event object\n     * @param {fabric.Object} target Object to test against\n     * @param {Object} [point] x,y object of point coordinates we want to check.\n     * @return {Boolean} true if point is contained within an area of given object\n     */\n    containsPoint: function containsPoint(e, target, point) {\n      var ignoreZoom = true,\n          pointer = point || this.getPointer(e, ignoreZoom),\n          xy;\n\n      if (target.group && target.group === this._activeObject && target.group.type === 'activeSelection') {\n        xy = this._normalizePointer(target.group, pointer);\n      } else {\n        xy = {\n          x: pointer.x,\n          y: pointer.y\n        };\n      } // http://www.geog.ubc.ca/courses/klink/gis.notes/ncgia/u32.html\n      // http://idav.ucdavis.edu/~okreylos/TAship/Spring2000/PointInPolygon.html\n\n\n      return target.containsPoint(xy) || target._findTargetCorner(pointer);\n    },\n\n    /**\n     * @private\n     */\n    _normalizePointer: function _normalizePointer(object, pointer) {\n      var m = object.calcTransformMatrix(),\n          invertedM = fabric.util.invertTransform(m),\n          vptPointer = this.restorePointerVpt(pointer);\n      return fabric.util.transformPoint(vptPointer, invertedM);\n    },\n\n    /**\n     * Returns true if object is transparent at a certain location\n     * @param {fabric.Object} target Object to check\n     * @param {Number} x Left coordinate\n     * @param {Number} y Top coordinate\n     * @return {Boolean}\n     */\n    isTargetTransparent: function isTargetTransparent(target, x, y) {\n      // in case the target is the activeObject, we cannot execute this optimization\n      // because we need to draw controls too.\n      if (target.shouldCache() && target._cacheCanvas && target !== this._activeObject) {\n        var normalizedPointer = this._normalizePointer(target, {\n          x: x,\n          y: y\n        }),\n            targetRelativeX = Math.max(target.cacheTranslationX + normalizedPointer.x * target.zoomX, 0),\n            targetRelativeY = Math.max(target.cacheTranslationY + normalizedPointer.y * target.zoomY, 0);\n\n        var isTransparent = fabric.util.isTransparent(target._cacheContext, Math.round(targetRelativeX), Math.round(targetRelativeY), this.targetFindTolerance);\n        return isTransparent;\n      }\n\n      var ctx = this.contextCache,\n          originalColor = target.selectionBackgroundColor,\n          v = this.viewportTransform;\n      target.selectionBackgroundColor = '';\n      this.clearContext(ctx);\n      ctx.save();\n      ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);\n      target.render(ctx);\n      ctx.restore();\n      target === this._activeObject && target._renderControls(ctx, {\n        hasBorders: false,\n        transparentCorners: false\n      }, {\n        hasBorders: false\n      });\n      target.selectionBackgroundColor = originalColor;\n      var isTransparent = fabric.util.isTransparent(ctx, x, y, this.targetFindTolerance);\n      return isTransparent;\n    },\n\n    /**\n     * takes an event and determins if selection key has been pressed\n     * @private\n     * @param {Event} e Event object\n     */\n    _isSelectionKeyPressed: function _isSelectionKeyPressed(e) {\n      var selectionKeyPressed = false;\n\n      if (Object.prototype.toString.call(this.selectionKey) === '[object Array]') {\n        selectionKeyPressed = !!this.selectionKey.find(function (key) {\n          return e[key] === true;\n        });\n      } else {\n        selectionKeyPressed = e[this.selectionKey];\n      }\n\n      return selectionKeyPressed;\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {fabric.Object} target\n     */\n    _shouldClearSelection: function _shouldClearSelection(e, target) {\n      var activeObjects = this.getActiveObjects(),\n          activeObject = this._activeObject;\n      return !target || target && activeObject && activeObjects.length > 1 && activeObjects.indexOf(target) === -1 && activeObject !== target && !this._isSelectionKeyPressed(e) || target && !target.evented || target && !target.selectable && activeObject && activeObject !== target;\n    },\n\n    /**\n     * centeredScaling from object can't override centeredScaling from canvas.\n     * this should be fixed, since object setting should take precedence over canvas.\n     * @private\n     * @param {fabric.Object} target\n     */\n    _shouldCenterTransform: function _shouldCenterTransform(target) {\n      if (!target) {\n        return;\n      }\n\n      var t = this._currentTransform,\n          centerTransform;\n\n      if (t.action === 'scale' || t.action === 'scaleX' || t.action === 'scaleY') {\n        centerTransform = this.centeredScaling || target.centeredScaling;\n      } else if (t.action === 'rotate') {\n        centerTransform = this.centeredRotation || target.centeredRotation;\n      }\n\n      return centerTransform ? !t.altKey : t.altKey;\n    },\n\n    /**\n     * @private\n     */\n    _getOriginFromCorner: function _getOriginFromCorner(target, corner) {\n      var origin = {\n        x: target.originX,\n        y: target.originY\n      };\n\n      if (corner === 'ml' || corner === 'tl' || corner === 'bl') {\n        origin.x = 'right';\n      } else if (corner === 'mr' || corner === 'tr' || corner === 'br') {\n        origin.x = 'left';\n      }\n\n      if (corner === 'tl' || corner === 'mt' || corner === 'tr') {\n        origin.y = 'bottom';\n      } else if (corner === 'bl' || corner === 'mb' || corner === 'br') {\n        origin.y = 'top';\n      }\n\n      return origin;\n    },\n\n    /**\n     * @private\n     * @param {Boolean} alreadySelected true if target is already selected\n     * @param {String} corner a string representing the corner ml, mr, tl ...\n     * @param {Event} e Event object\n     * @param {fabric.Object} [target] inserted back to help overriding. Unused\n     */\n    _getActionFromCorner: function _getActionFromCorner(alreadySelected, corner, e\n    /* target */\n    ) {\n      if (!corner || !alreadySelected) {\n        return 'drag';\n      }\n\n      switch (corner) {\n        case 'mtr':\n          return 'rotate';\n\n        case 'ml':\n        case 'mr':\n          return e[this.altActionKey] ? 'skewY' : 'scaleX';\n\n        case 'mt':\n        case 'mb':\n          return e[this.altActionKey] ? 'skewX' : 'scaleY';\n\n        default:\n          return 'scale';\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {fabric.Object} target\n     */\n    _setupCurrentTransform: function _setupCurrentTransform(e, target, alreadySelected) {\n      if (!target) {\n        return;\n      }\n\n      var pointer = this.getPointer(e),\n          corner = target._findTargetCorner(this.getPointer(e, true)),\n          action = this._getActionFromCorner(alreadySelected, corner, e, target),\n          origin = this._getOriginFromCorner(target, corner);\n\n      this._currentTransform = {\n        target: target,\n        action: action,\n        corner: corner,\n        scaleX: target.scaleX,\n        scaleY: target.scaleY,\n        skewX: target.skewX,\n        skewY: target.skewY,\n        // used by transation\n        offsetX: pointer.x - target.left,\n        offsetY: pointer.y - target.top,\n        originX: origin.x,\n        originY: origin.y,\n        ex: pointer.x,\n        ey: pointer.y,\n        lastX: pointer.x,\n        lastY: pointer.y,\n        // unsure they are usefull anymore.\n        // left: target.left,\n        // top: target.top,\n        theta: degreesToRadians(target.angle),\n        // end of unsure\n        width: target.width * target.scaleX,\n        mouseXSign: 1,\n        mouseYSign: 1,\n        shiftKey: e.shiftKey,\n        altKey: e[this.centeredKey],\n        original: fabric.util.saveObjectTransform(target)\n      };\n      this._currentTransform.original.originX = origin.x;\n      this._currentTransform.original.originY = origin.y;\n\n      this._resetCurrentTransform();\n\n      this._beforeTransform(e);\n    },\n\n    /**\n     * Translates object by \"setting\" its left/top\n     * @private\n     * @param {Number} x pointer's x coordinate\n     * @param {Number} y pointer's y coordinate\n     * @return {Boolean} true if the translation occurred\n     */\n    _translateObject: function _translateObject(x, y) {\n      var transform = this._currentTransform,\n          target = transform.target,\n          newLeft = x - transform.offsetX,\n          newTop = y - transform.offsetY,\n          moveX = !target.get('lockMovementX') && target.left !== newLeft,\n          moveY = !target.get('lockMovementY') && target.top !== newTop;\n      moveX && target.set('left', newLeft);\n      moveY && target.set('top', newTop);\n      return moveX || moveY;\n    },\n\n    /**\n     * Check if we are increasing a positive skew or lower it,\n     * checking mouse direction and pressed corner.\n     * @private\n     */\n    _changeSkewTransformOrigin: function _changeSkewTransformOrigin(mouseMove, t, by) {\n      var property = 'originX',\n          origins = {\n        0: 'center'\n      },\n          skew = t.target.skewX,\n          originA = 'left',\n          originB = 'right',\n          corner = t.corner === 'mt' || t.corner === 'ml' ? 1 : -1,\n          flipSign = 1;\n      mouseMove = mouseMove > 0 ? 1 : -1;\n\n      if (by === 'y') {\n        skew = t.target.skewY;\n        originA = 'top';\n        originB = 'bottom';\n        property = 'originY';\n      }\n\n      origins[-1] = originA;\n      origins[1] = originB;\n      t.target.flipX && (flipSign *= -1);\n      t.target.flipY && (flipSign *= -1);\n\n      if (skew === 0) {\n        t.skewSign = -corner * mouseMove * flipSign;\n        t[property] = origins[-mouseMove];\n      } else {\n        skew = skew > 0 ? 1 : -1;\n        t.skewSign = skew;\n        t[property] = origins[skew * corner * flipSign];\n      }\n    },\n\n    /**\n     * Skew object by mouse events\n     * @private\n     * @param {Number} x pointer's x coordinate\n     * @param {Number} y pointer's y coordinate\n     * @param {String} by Either 'x' or 'y'\n     * @return {Boolean} true if the skewing occurred\n     */\n    _skewObject: function _skewObject(x, y, by) {\n      var t = this._currentTransform,\n          target = t.target,\n          skewed = false,\n          lockSkewingX = target.get('lockSkewingX'),\n          lockSkewingY = target.get('lockSkewingY');\n\n      if (lockSkewingX && by === 'x' || lockSkewingY && by === 'y') {\n        return false;\n      } // Get the constraint point\n\n\n      var center = target.getCenterPoint(),\n          actualMouseByCenter = target.toLocalPoint(new fabric.Point(x, y), 'center', 'center')[by],\n          lastMouseByCenter = target.toLocalPoint(new fabric.Point(t.lastX, t.lastY), 'center', 'center')[by],\n          actualMouseByOrigin,\n          constraintPosition,\n          dim = target._getTransformedDimensions();\n\n      this._changeSkewTransformOrigin(actualMouseByCenter - lastMouseByCenter, t, by);\n\n      actualMouseByOrigin = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY)[by];\n      constraintPosition = target.translateToOriginPoint(center, t.originX, t.originY); // Actually skew the object\n\n      skewed = this._setObjectSkew(actualMouseByOrigin, t, by, dim);\n      t.lastX = x;\n      t.lastY = y; // Make sure the constraints apply\n\n      target.setPositionByOrigin(constraintPosition, t.originX, t.originY);\n      return skewed;\n    },\n\n    /**\n     * Set object skew\n     * @private\n     * @return {Boolean} true if the skewing occurred\n     */\n    _setObjectSkew: function _setObjectSkew(localMouse, transform, by, _dim) {\n      var target = transform.target,\n          newValue,\n          skewed = false,\n          skewSign = transform.skewSign,\n          newDim,\n          dimNoSkew,\n          otherBy,\n          _otherBy,\n          _by,\n          newDimMouse,\n          skewX,\n          skewY;\n\n      if (by === 'x') {\n        otherBy = 'y';\n        _otherBy = 'Y';\n        _by = 'X';\n        skewX = 0;\n        skewY = target.skewY;\n      } else {\n        otherBy = 'x';\n        _otherBy = 'X';\n        _by = 'Y';\n        skewX = target.skewX;\n        skewY = 0;\n      }\n\n      dimNoSkew = target._getTransformedDimensions(skewX, skewY);\n      newDimMouse = 2 * Math.abs(localMouse) - dimNoSkew[by];\n\n      if (newDimMouse <= 2) {\n        newValue = 0;\n      } else {\n        newValue = skewSign * Math.atan(newDimMouse / target['scale' + _by] / (dimNoSkew[otherBy] / target['scale' + _otherBy]));\n        newValue = fabric.util.radiansToDegrees(newValue);\n      }\n\n      skewed = target['skew' + _by] !== newValue;\n      target.set('skew' + _by, newValue);\n\n      if (target['skew' + _otherBy] !== 0) {\n        newDim = target._getTransformedDimensions();\n        newValue = _dim[otherBy] / newDim[otherBy] * target['scale' + _otherBy];\n        target.set('scale' + _otherBy, newValue);\n      }\n\n      return skewed;\n    },\n\n    /**\n     * Scales object by invoking its scaleX/scaleY methods\n     * @private\n     * @param {Number} x pointer's x coordinate\n     * @param {Number} y pointer's y coordinate\n     * @param {String} by Either 'x' or 'y' - specifies dimension constraint by which to scale an object.\n     *                    When not provided, an object is scaled by both dimensions equally\n     * @return {Boolean} true if the scaling occurred\n     */\n    _scaleObject: function _scaleObject(x, y, by) {\n      var t = this._currentTransform,\n          target = t.target,\n          lockScalingX = target.lockScalingX,\n          lockScalingY = target.lockScalingY,\n          lockScalingFlip = target.lockScalingFlip;\n\n      if (lockScalingX && lockScalingY) {\n        return false;\n      } // Get the constraint point\n\n\n      var constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY),\n          localMouse = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY),\n          dim = target._getTransformedDimensions(),\n          scaled = false;\n\n      this._setLocalMouse(localMouse, t); // Actually scale the object\n\n\n      scaled = this._setObjectScale(localMouse, t, lockScalingX, lockScalingY, by, lockScalingFlip, dim); // Make sure the constraints apply\n\n      target.setPositionByOrigin(constraintPosition, t.originX, t.originY);\n      return scaled;\n    },\n\n    /**\n     * @private\n     * @return {Boolean} true if the scaling occurred\n     */\n    _setObjectScale: function _setObjectScale(localMouse, transform, lockScalingX, lockScalingY, by, lockScalingFlip, _dim) {\n      var target = transform.target,\n          forbidScalingX = false,\n          forbidScalingY = false,\n          scaled = false,\n          scaleX = localMouse.x * target.scaleX / _dim.x,\n          scaleY = localMouse.y * target.scaleY / _dim.y,\n          changeX = target.scaleX !== scaleX,\n          changeY = target.scaleY !== scaleY;\n      transform.newScaleX = scaleX;\n      transform.newScaleY = scaleY;\n\n      if (fabric.Textbox && by === 'x' && target instanceof fabric.Textbox) {\n        var w = target.width * (localMouse.x / _dim.x);\n\n        if (w >= target.getMinWidth()) {\n          scaled = w !== target.width;\n          target.set('width', w);\n          return scaled;\n        }\n\n        return false;\n      }\n\n      if (lockScalingFlip && scaleX <= 0 && scaleX < target.scaleX) {\n        forbidScalingX = true;\n        localMouse.x = 0;\n      }\n\n      if (lockScalingFlip && scaleY <= 0 && scaleY < target.scaleY) {\n        forbidScalingY = true;\n        localMouse.y = 0;\n      }\n\n      if (by === 'equally' && !lockScalingX && !lockScalingY) {\n        scaled = this._scaleObjectEqually(localMouse, target, transform, _dim);\n      } else if (!by) {\n        forbidScalingX || lockScalingX || target.set('scaleX', scaleX) && (scaled = scaled || changeX);\n        forbidScalingY || lockScalingY || target.set('scaleY', scaleY) && (scaled = scaled || changeY);\n      } else if (by === 'x' && !target.get('lockUniScaling')) {\n        forbidScalingX || lockScalingX || target.set('scaleX', scaleX) && (scaled = changeX);\n      } else if (by === 'y' && !target.get('lockUniScaling')) {\n        forbidScalingY || lockScalingY || target.set('scaleY', scaleY) && (scaled = changeY);\n      }\n\n      forbidScalingX || forbidScalingY || this._flipObject(transform, by);\n      return scaled;\n    },\n\n    /**\n     * @private\n     * @return {Boolean} true if the scaling occurred\n     */\n    _scaleObjectEqually: function _scaleObjectEqually(localMouse, target, transform, _dim) {\n      var dist = localMouse.y + localMouse.x,\n          lastDist = _dim.y * transform.original.scaleY / target.scaleY + _dim.x * transform.original.scaleX / target.scaleX,\n          scaled,\n          signX = localMouse.x < 0 ? -1 : 1,\n          signY = localMouse.y < 0 ? -1 : 1,\n          newScaleX,\n          newScaleY; // We use transform.scaleX/Y instead of target.scaleX/Y\n      // because the object may have a min scale and we'll loose the proportions\n\n      newScaleX = signX * Math.abs(transform.original.scaleX * dist / lastDist);\n      newScaleY = signY * Math.abs(transform.original.scaleY * dist / lastDist);\n      scaled = newScaleX !== target.scaleX || newScaleY !== target.scaleY;\n      target.set('scaleX', newScaleX);\n      target.set('scaleY', newScaleY);\n      return scaled;\n    },\n\n    /**\n     * @private\n     */\n    _flipObject: function _flipObject(transform, by) {\n      if (transform.newScaleX < 0 && by !== 'y') {\n        if (transform.originX === 'left') {\n          transform.originX = 'right';\n        } else if (transform.originX === 'right') {\n          transform.originX = 'left';\n        }\n      }\n\n      if (transform.newScaleY < 0 && by !== 'x') {\n        if (transform.originY === 'top') {\n          transform.originY = 'bottom';\n        } else if (transform.originY === 'bottom') {\n          transform.originY = 'top';\n        }\n      }\n    },\n\n    /**\n     * @private\n     */\n    _setLocalMouse: function _setLocalMouse(localMouse, t) {\n      var target = t.target,\n          zoom = this.getZoom(),\n          padding = target.padding / zoom;\n\n      if (t.originX === 'right') {\n        localMouse.x *= -1;\n      } else if (t.originX === 'center') {\n        localMouse.x *= t.mouseXSign * 2;\n\n        if (localMouse.x < 0) {\n          t.mouseXSign = -t.mouseXSign;\n        }\n      }\n\n      if (t.originY === 'bottom') {\n        localMouse.y *= -1;\n      } else if (t.originY === 'center') {\n        localMouse.y *= t.mouseYSign * 2;\n\n        if (localMouse.y < 0) {\n          t.mouseYSign = -t.mouseYSign;\n        }\n      } // adjust the mouse coordinates when dealing with padding\n\n\n      if (abs(localMouse.x) > padding) {\n        if (localMouse.x < 0) {\n          localMouse.x += padding;\n        } else {\n          localMouse.x -= padding;\n        }\n      } else {\n        // mouse is within the padding, set to 0\n        localMouse.x = 0;\n      }\n\n      if (abs(localMouse.y) > padding) {\n        if (localMouse.y < 0) {\n          localMouse.y += padding;\n        } else {\n          localMouse.y -= padding;\n        }\n      } else {\n        localMouse.y = 0;\n      }\n    },\n\n    /**\n     * Rotates object by invoking its rotate method\n     * @private\n     * @param {Number} x pointer's x coordinate\n     * @param {Number} y pointer's y coordinate\n     * @return {Boolean} true if the rotation occurred\n     */\n    _rotateObject: function _rotateObject(x, y) {\n      var t = this._currentTransform,\n          target = t.target,\n          constraintPosition,\n          constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY);\n\n      if (target.lockRotation) {\n        return false;\n      }\n\n      var lastAngle = atan2(t.ey - constraintPosition.y, t.ex - constraintPosition.x),\n          curAngle = atan2(y - constraintPosition.y, x - constraintPosition.x),\n          angle = radiansToDegrees(curAngle - lastAngle + t.theta),\n          hasRotated = true;\n\n      if (target.snapAngle > 0) {\n        var snapAngle = target.snapAngle,\n            snapThreshold = target.snapThreshold || snapAngle,\n            rightAngleLocked = Math.ceil(angle / snapAngle) * snapAngle,\n            leftAngleLocked = Math.floor(angle / snapAngle) * snapAngle;\n\n        if (Math.abs(angle - leftAngleLocked) < snapThreshold) {\n          angle = leftAngleLocked;\n        } else if (Math.abs(angle - rightAngleLocked) < snapThreshold) {\n          angle = rightAngleLocked;\n        }\n      } // normalize angle to positive value\n\n\n      if (angle < 0) {\n        angle = 360 + angle;\n      }\n\n      angle %= 360;\n\n      if (target.angle === angle) {\n        hasRotated = false;\n      } else {\n        // rotation only happen here\n        target.angle = angle; // Make sure the constraints apply\n\n        target.setPositionByOrigin(constraintPosition, t.originX, t.originY);\n      }\n\n      return hasRotated;\n    },\n\n    /**\n     * Set the cursor type of the canvas element\n     * @param {String} value Cursor type of the canvas element.\n     * @see http://www.w3.org/TR/css3-ui/#cursor\n     */\n    setCursor: function setCursor(value) {\n      this.upperCanvasEl.style.cursor = value;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx to draw the selection on\n     */\n    _drawSelection: function _drawSelection(ctx) {\n      var groupSelector = this._groupSelector,\n          left = groupSelector.left,\n          top = groupSelector.top,\n          aleft = abs(left),\n          atop = abs(top);\n\n      if (this.selectionColor) {\n        ctx.fillStyle = this.selectionColor;\n        ctx.fillRect(groupSelector.ex - (left > 0 ? 0 : -left), groupSelector.ey - (top > 0 ? 0 : -top), aleft, atop);\n      }\n\n      if (!this.selectionLineWidth || !this.selectionBorderColor) {\n        return;\n      }\n\n      ctx.lineWidth = this.selectionLineWidth;\n      ctx.strokeStyle = this.selectionBorderColor; // selection border\n\n      if (this.selectionDashArray.length > 1 && !supportLineDash) {\n        var px = groupSelector.ex + STROKE_OFFSET - (left > 0 ? 0 : aleft),\n            py = groupSelector.ey + STROKE_OFFSET - (top > 0 ? 0 : atop);\n        ctx.beginPath();\n        fabric.util.drawDashedLine(ctx, px, py, px + aleft, py, this.selectionDashArray);\n        fabric.util.drawDashedLine(ctx, px, py + atop - 1, px + aleft, py + atop - 1, this.selectionDashArray);\n        fabric.util.drawDashedLine(ctx, px, py, px, py + atop, this.selectionDashArray);\n        fabric.util.drawDashedLine(ctx, px + aleft - 1, py, px + aleft - 1, py + atop, this.selectionDashArray);\n        ctx.closePath();\n        ctx.stroke();\n      } else {\n        fabric.Object.prototype._setLineDash.call(this, ctx, this.selectionDashArray);\n\n        ctx.strokeRect(groupSelector.ex + STROKE_OFFSET - (left > 0 ? 0 : aleft), groupSelector.ey + STROKE_OFFSET - (top > 0 ? 0 : atop), aleft, atop);\n      }\n    },\n\n    /**\n     * Method that determines what object we are clicking on\n     * the skipGroup parameter is for internal use, is needed for shift+click action\n     * 11/09/2018 TODO: would be cool if findTarget could discern between being a full target\n     * or the outside part of the corner.\n     * @param {Event} e mouse event\n     * @param {Boolean} skipGroup when true, activeGroup is skipped and only objects are traversed through\n     * @return {fabric.Object} the target found\n     */\n    findTarget: function findTarget(e, skipGroup) {\n      if (this.skipTargetFind) {\n        return;\n      }\n\n      var ignoreZoom = true,\n          pointer = this.getPointer(e, ignoreZoom),\n          activeObject = this._activeObject,\n          aObjects = this.getActiveObjects(),\n          activeTarget,\n          activeTargetSubs; // first check current group (if one exists)\n      // active group does not check sub targets like normal groups.\n      // if active group just exits.\n\n      this.targets = [];\n\n      if (aObjects.length > 1 && !skipGroup && activeObject === this._searchPossibleTargets([activeObject], pointer)) {\n        return activeObject;\n      } // if we hit the corner of an activeObject, let's return that.\n\n\n      if (aObjects.length === 1 && activeObject._findTargetCorner(pointer)) {\n        return activeObject;\n      }\n\n      if (aObjects.length === 1 && activeObject === this._searchPossibleTargets([activeObject], pointer)) {\n        if (!this.preserveObjectStacking) {\n          return activeObject;\n        } else {\n          activeTarget = activeObject;\n          activeTargetSubs = this.targets;\n          this.targets = [];\n        }\n      }\n\n      var target = this._searchPossibleTargets(this._objects, pointer);\n\n      if (e[this.altSelectionKey] && target && activeTarget && target !== activeTarget) {\n        target = activeTarget;\n        this.targets = activeTargetSubs;\n      }\n\n      return target;\n    },\n\n    /**\n     * Checks point is inside the object.\n     * @param {Object} [pointer] x,y object of point coordinates we want to check.\n     * @param {fabric.Object} obj Object to test against\n     * @param {Object} [globalPointer] x,y object of point coordinates relative to canvas used to search per pixel target.\n     * @return {Boolean} true if point is contained within an area of given object\n     * @private\n     */\n    _checkTarget: function _checkTarget(pointer, obj, globalPointer) {\n      if (obj && obj.visible && obj.evented && this.containsPoint(null, obj, pointer)) {\n        if ((this.perPixelTargetFind || obj.perPixelTargetFind) && !obj.isEditing) {\n          var isTransparent = this.isTargetTransparent(obj, globalPointer.x, globalPointer.y);\n\n          if (!isTransparent) {\n            return true;\n          }\n        } else {\n          return true;\n        }\n      }\n    },\n\n    /**\n     * Function used to search inside objects an object that contains pointer in bounding box or that contains pointerOnCanvas when painted\n     * @param {Array} [objects] objects array to look into\n     * @param {Object} [pointer] x,y object of point coordinates we want to check.\n     * @return {fabric.Object} object that contains pointer\n     * @private\n     */\n    _searchPossibleTargets: function _searchPossibleTargets(objects, pointer) {\n      // Cache all targets where their bounding box contains point.\n      var target,\n          i = objects.length,\n          subTarget; // Do not check for currently grouped objects, since we check the parent group itself.\n      // until we call this function specifically to search inside the activeGroup\n\n      while (i--) {\n        var objToCheck = objects[i];\n        var pointerToUse = objToCheck.group && objToCheck.group.type !== 'activeSelection' ? this._normalizePointer(objToCheck.group, pointer) : pointer;\n\n        if (this._checkTarget(pointerToUse, objToCheck, pointer)) {\n          target = objects[i];\n\n          if (target.subTargetCheck && target instanceof fabric.Group) {\n            subTarget = this._searchPossibleTargets(target._objects, pointer);\n            subTarget && this.targets.push(subTarget);\n          }\n\n          break;\n        }\n      }\n\n      return target;\n    },\n\n    /**\n     * Returns pointer coordinates without the effect of the viewport\n     * @param {Object} pointer with \"x\" and \"y\" number values\n     * @return {Object} object with \"x\" and \"y\" number values\n     */\n    restorePointerVpt: function restorePointerVpt(pointer) {\n      return fabric.util.transformPoint(pointer, fabric.util.invertTransform(this.viewportTransform));\n    },\n\n    /**\n     * Returns pointer coordinates relative to canvas.\n     * Can return coordinates with or without viewportTransform.\n     * ignoreZoom false gives back coordinates that represent\n     * the point clicked on canvas element.\n     * ignoreZoom true gives back coordinates after being processed\n     * by the viewportTransform ( sort of coordinates of what is displayed\n     * on the canvas where you are clicking.\n     * ignoreZoom true = HTMLElement coordinates relative to top,left\n     * ignoreZoom false, default = fabric space coordinates, the same used for shape position\n     * To interact with your shapes top and left you want to use ignoreZoom true\n     * most of the time, while ignoreZoom false will give you coordinates\n     * compatible with the object.oCoords system.\n     * of the time.\n     * @param {Event} e\n     * @param {Boolean} ignoreZoom\n     * @return {Object} object with \"x\" and \"y\" number values\n     */\n    getPointer: function getPointer(e, ignoreZoom) {\n      // return cached values if we are in the event processing chain\n      if (this._absolutePointer && !ignoreZoom) {\n        return this._absolutePointer;\n      }\n\n      if (this._pointer && ignoreZoom) {\n        return this._pointer;\n      }\n\n      var pointer = _getPointer(e),\n          upperCanvasEl = this.upperCanvasEl,\n          bounds = upperCanvasEl.getBoundingClientRect(),\n          boundsWidth = bounds.width || 0,\n          boundsHeight = bounds.height || 0,\n          cssScale;\n\n      if (!boundsWidth || !boundsHeight) {\n        if ('top' in bounds && 'bottom' in bounds) {\n          boundsHeight = Math.abs(bounds.top - bounds.bottom);\n        }\n\n        if ('right' in bounds && 'left' in bounds) {\n          boundsWidth = Math.abs(bounds.right - bounds.left);\n        }\n      }\n\n      this.calcOffset();\n      pointer.x = pointer.x - this._offset.left;\n      pointer.y = pointer.y - this._offset.top;\n\n      if (!ignoreZoom) {\n        pointer = this.restorePointerVpt(pointer);\n      }\n\n      var retinaScaling = this.getRetinaScaling();\n\n      if (retinaScaling !== 1) {\n        pointer.x /= retinaScaling;\n        pointer.y /= retinaScaling;\n      }\n\n      if (boundsWidth === 0 || boundsHeight === 0) {\n        // If bounds are not available (i.e. not visible), do not apply scale.\n        cssScale = {\n          width: 1,\n          height: 1\n        };\n      } else {\n        cssScale = {\n          width: upperCanvasEl.width / boundsWidth,\n          height: upperCanvasEl.height / boundsHeight\n        };\n      }\n\n      return {\n        x: pointer.x * cssScale.width,\n        y: pointer.y * cssScale.height\n      };\n    },\n\n    /**\n     * @private\n     * @throws {CANVAS_INIT_ERROR} If canvas can not be initialized\n     */\n    _createUpperCanvas: function _createUpperCanvas() {\n      var lowerCanvasClass = this.lowerCanvasEl.className.replace(/\\s*lower-canvas\\s*/, ''),\n          lowerCanvasEl = this.lowerCanvasEl,\n          upperCanvasEl = this.upperCanvasEl; // there is no need to create a new upperCanvas element if we have already one.\n\n      if (upperCanvasEl) {\n        upperCanvasEl.className = '';\n      } else {\n        upperCanvasEl = this._createCanvasElement();\n        this.upperCanvasEl = upperCanvasEl;\n      }\n\n      fabric.util.addClass(upperCanvasEl, 'upper-canvas ' + lowerCanvasClass);\n      this.wrapperEl.appendChild(upperCanvasEl);\n\n      this._copyCanvasStyle(lowerCanvasEl, upperCanvasEl);\n\n      this._applyCanvasStyle(upperCanvasEl);\n\n      this.contextTop = upperCanvasEl.getContext('2d');\n    },\n\n    /**\n     * @private\n     */\n    _createCacheCanvas: function _createCacheCanvas() {\n      this.cacheCanvasEl = this._createCanvasElement();\n      this.cacheCanvasEl.setAttribute('width', this.width);\n      this.cacheCanvasEl.setAttribute('height', this.height);\n      this.contextCache = this.cacheCanvasEl.getContext('2d');\n    },\n\n    /**\n     * @private\n     */\n    _initWrapperElement: function _initWrapperElement() {\n      this.wrapperEl = fabric.util.wrapElement(this.lowerCanvasEl, 'div', {\n        'class': this.containerClass\n      });\n      fabric.util.setStyle(this.wrapperEl, {\n        width: this.width + 'px',\n        height: this.height + 'px',\n        position: 'relative'\n      });\n      fabric.util.makeElementUnselectable(this.wrapperEl);\n    },\n\n    /**\n     * @private\n     * @param {HTMLElement} element canvas element to apply styles on\n     */\n    _applyCanvasStyle: function _applyCanvasStyle(element) {\n      var width = this.width || element.width,\n          height = this.height || element.height;\n      fabric.util.setStyle(element, {\n        position: 'absolute',\n        width: width + 'px',\n        height: height + 'px',\n        left: 0,\n        top: 0,\n        'touch-action': this.allowTouchScrolling ? 'manipulation' : 'none',\n        '-ms-touch-action': this.allowTouchScrolling ? 'manipulation' : 'none'\n      });\n      element.width = width;\n      element.height = height;\n      fabric.util.makeElementUnselectable(element);\n    },\n\n    /**\n     * Copy the entire inline style from one element (fromEl) to another (toEl)\n     * @private\n     * @param {Element} fromEl Element style is copied from\n     * @param {Element} toEl Element copied style is applied to\n     */\n    _copyCanvasStyle: function _copyCanvasStyle(fromEl, toEl) {\n      toEl.style.cssText = fromEl.style.cssText;\n    },\n\n    /**\n     * Returns context of canvas where object selection is drawn\n     * @return {CanvasRenderingContext2D}\n     */\n    getSelectionContext: function getSelectionContext() {\n      return this.contextTop;\n    },\n\n    /**\n     * Returns &lt;canvas> element on which object selection is drawn\n     * @return {HTMLCanvasElement}\n     */\n    getSelectionElement: function getSelectionElement() {\n      return this.upperCanvasEl;\n    },\n\n    /**\n     * Returns currently active object\n     * @return {fabric.Object} active object\n     */\n    getActiveObject: function getActiveObject() {\n      return this._activeObject;\n    },\n\n    /**\n     * Returns an array with the current selected objects\n     * @return {fabric.Object} active object\n     */\n    getActiveObjects: function getActiveObjects() {\n      var active = this._activeObject;\n\n      if (active) {\n        if (active.type === 'activeSelection' && active._objects) {\n          return active._objects.slice(0);\n        } else {\n          return [active];\n        }\n      }\n\n      return [];\n    },\n\n    /**\n     * @private\n     * @param {fabric.Object} obj Object that was removed\n     */\n    _onObjectRemoved: function _onObjectRemoved(obj) {\n      // removing active object should fire \"selection:cleared\" events\n      if (obj === this._activeObject) {\n        this.fire('before:selection:cleared', {\n          target: obj\n        });\n\n        this._discardActiveObject();\n\n        this.fire('selection:cleared', {\n          target: obj\n        });\n        obj.fire('deselected');\n      }\n\n      if (obj === this._hoveredTarget) {\n        this._hoveredTarget = null;\n        this._hoveredTargets = [];\n      }\n\n      this.callSuper('_onObjectRemoved', obj);\n    },\n\n    /**\n     * @private\n     * Compares the old activeObject with the current one and fires correct events\n     * @param {fabric.Object} obj old activeObject\n     */\n    _fireSelectionEvents: function _fireSelectionEvents(oldObjects, e) {\n      var somethingChanged = false,\n          objects = this.getActiveObjects(),\n          added = [],\n          removed = [],\n          opt = {\n        e: e\n      };\n      oldObjects.forEach(function (oldObject) {\n        if (objects.indexOf(oldObject) === -1) {\n          somethingChanged = true;\n          oldObject.fire('deselected', opt);\n          removed.push(oldObject);\n        }\n      });\n      objects.forEach(function (object) {\n        if (oldObjects.indexOf(object) === -1) {\n          somethingChanged = true;\n          object.fire('selected', opt);\n          added.push(object);\n        }\n      });\n\n      if (oldObjects.length > 0 && objects.length > 0) {\n        opt.selected = added;\n        opt.deselected = removed; // added for backward compatibility\n\n        opt.updated = added[0] || removed[0];\n        opt.target = this._activeObject;\n        somethingChanged && this.fire('selection:updated', opt);\n      } else if (objects.length > 0) {\n        // deprecated event\n        if (objects.length === 1) {\n          opt.target = added[0];\n          this.fire('object:selected', opt);\n        }\n\n        opt.selected = added; // added for backward compatibility\n\n        opt.target = this._activeObject;\n        this.fire('selection:created', opt);\n      } else if (oldObjects.length > 0) {\n        opt.deselected = removed;\n        this.fire('selection:cleared', opt);\n      }\n    },\n\n    /**\n     * Sets given object as the only active object on canvas\n     * @param {fabric.Object} object Object to set as an active one\n     * @param {Event} [e] Event (passed along when firing \"object:selected\")\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    setActiveObject: function setActiveObject(object, e) {\n      var currentActives = this.getActiveObjects();\n\n      this._setActiveObject(object, e);\n\n      this._fireSelectionEvents(currentActives, e);\n\n      return this;\n    },\n\n    /**\n     * @private\n     * @param {Object} object to set as active\n     * @param {Event} [e] Event (passed along when firing \"object:selected\")\n     * @return {Boolean} true if the selection happened\n     */\n    _setActiveObject: function _setActiveObject(object, e) {\n      if (this._activeObject === object) {\n        return false;\n      }\n\n      if (!this._discardActiveObject(e, object)) {\n        return false;\n      }\n\n      if (object.onSelect({\n        e: e\n      })) {\n        return false;\n      }\n\n      this._activeObject = object;\n      return true;\n    },\n\n    /**\n     * @private\n     */\n    _discardActiveObject: function _discardActiveObject(e, object) {\n      var obj = this._activeObject;\n\n      if (obj) {\n        // onDeselect return TRUE to cancel selection;\n        if (obj.onDeselect({\n          e: e,\n          object: object\n        })) {\n          return false;\n        }\n\n        this._activeObject = null;\n      }\n\n      return true;\n    },\n\n    /**\n     * Discards currently active object and fire events. If the function is called by fabric\n     * as a consequence of a mouse event, the event is passed as a parameter and\n     * sent to the fire function for the custom events. When used as a method the\n     * e param does not have any application.\n     * @param {event} e\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    discardActiveObject: function discardActiveObject(e) {\n      var currentActives = this.getActiveObjects(),\n          activeObject = this.getActiveObject();\n\n      if (currentActives.length) {\n        this.fire('before:selection:cleared', {\n          target: activeObject,\n          e: e\n        });\n      }\n\n      this._discardActiveObject(e);\n\n      this._fireSelectionEvents(currentActives, e);\n\n      return this;\n    },\n\n    /**\n     * Clears a canvas element and removes all event listeners\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    dispose: function dispose() {\n      var wrapper = this.wrapperEl;\n      this.removeListeners();\n      wrapper.removeChild(this.upperCanvasEl);\n      wrapper.removeChild(this.lowerCanvasEl);\n      this.contextCache = null;\n      this.contextTop = null;\n      ['upperCanvasEl', 'cacheCanvasEl'].forEach(function (element) {\n        fabric.util.cleanUpJsdomNode(this[element]);\n        this[element] = undefined;\n      }.bind(this));\n\n      if (wrapper.parentNode) {\n        wrapper.parentNode.replaceChild(this.lowerCanvasEl, this.wrapperEl);\n      }\n\n      delete this.wrapperEl;\n      fabric.StaticCanvas.prototype.dispose.call(this);\n      return this;\n    },\n\n    /**\n     * Clears all contexts (background, main, top) of an instance\n     * @return {fabric.Canvas} thisArg\n     * @chainable\n     */\n    clear: function clear() {\n      // this.discardActiveGroup();\n      this.discardActiveObject();\n      this.clearContext(this.contextTop);\n      return this.callSuper('clear');\n    },\n\n    /**\n     * Draws objects' controls (borders/controls)\n     * @param {CanvasRenderingContext2D} ctx Context to render controls on\n     */\n    drawControls: function drawControls(ctx) {\n      var activeObject = this._activeObject;\n\n      if (activeObject) {\n        activeObject._renderControls(ctx);\n      }\n    },\n\n    /**\n     * @private\n     */\n    _toObject: function _toObject(instance, methodName, propertiesToInclude) {\n      //If the object is part of the current selection group, it should\n      //be transformed appropriately\n      //i.e. it should be serialised as it would appear if the selection group\n      //were to be destroyed.\n      var originalProperties = this._realizeGroupTransformOnObject(instance),\n          object = this.callSuper('_toObject', instance, methodName, propertiesToInclude); //Undo the damage we did by changing all of its properties\n\n\n      this._unwindGroupTransformOnObject(instance, originalProperties);\n\n      return object;\n    },\n\n    /**\n     * Realises an object's group transformation on it\n     * @private\n     * @param {fabric.Object} [instance] the object to transform (gets mutated)\n     * @returns the original values of instance which were changed\n     */\n    _realizeGroupTransformOnObject: function _realizeGroupTransformOnObject(instance) {\n      if (instance.group && instance.group.type === 'activeSelection' && this._activeObject === instance.group) {\n        var layoutProps = ['angle', 'flipX', 'flipY', 'left', 'scaleX', 'scaleY', 'skewX', 'skewY', 'top']; //Copy all the positionally relevant properties across now\n\n        var originalValues = {};\n        layoutProps.forEach(function (prop) {\n          originalValues[prop] = instance[prop];\n        });\n\n        this._activeObject.realizeTransform(instance);\n\n        return originalValues;\n      } else {\n        return null;\n      }\n    },\n\n    /**\n     * Restores the changed properties of instance\n     * @private\n     * @param {fabric.Object} [instance] the object to un-transform (gets mutated)\n     * @param {Object} [originalValues] the original values of instance, as returned by _realizeGroupTransformOnObject\n     */\n    _unwindGroupTransformOnObject: function _unwindGroupTransformOnObject(instance, originalValues) {\n      if (originalValues) {\n        instance.set(originalValues);\n      }\n    },\n\n    /**\n     * @private\n     */\n    _setSVGObject: function _setSVGObject(markup, instance, reviver) {\n      //If the object is in a selection group, simulate what would happen to that\n      //object when the group is deselected\n      var originalProperties = this._realizeGroupTransformOnObject(instance);\n\n      this.callSuper('_setSVGObject', markup, instance, reviver);\n\n      this._unwindGroupTransformOnObject(instance, originalProperties);\n    },\n    setViewportTransform: function setViewportTransform(vpt) {\n      if (this.renderOnAddRemove && this._activeObject && this._activeObject.isEditing) {\n        this._activeObject.clearContextTop();\n      }\n\n      fabric.StaticCanvas.prototype.setViewportTransform.call(this, vpt);\n    }\n  }); // copying static properties manually to work around Opera's bug,\n  // where \"prototype\" property is enumerable and overrides existing prototype\n\n  for (var prop in fabric.StaticCanvas) {\n    if (prop !== 'prototype') {\n      fabric.Canvas[prop] = fabric.StaticCanvas[prop];\n    }\n  }\n})();\n\n(function () {\n  var cursorOffset = {\n    mt: 0,\n    // n\n    tr: 1,\n    // ne\n    mr: 2,\n    // e\n    br: 3,\n    // se\n    mb: 4,\n    // s\n    bl: 5,\n    // sw\n    ml: 6,\n    // w\n    tl: 7 // nw\n\n  },\n      addListener = fabric.util.addListener,\n      removeListener = fabric.util.removeListener,\n      RIGHT_CLICK = 3,\n      MIDDLE_CLICK = 2,\n      LEFT_CLICK = 1,\n      addEventOptions = {\n    passive: false\n  };\n\n  function checkClick(e, value) {\n    return e.button && e.button === value - 1;\n  }\n\n  fabric.util.object.extend(fabric.Canvas.prototype,\n  /** @lends fabric.Canvas.prototype */\n  {\n    /**\n     * Map of cursor style values for each of the object controls\n     * @private\n     */\n    cursorMap: ['n-resize', 'ne-resize', 'e-resize', 'se-resize', 's-resize', 'sw-resize', 'w-resize', 'nw-resize'],\n\n    /**\n     * Contains the id of the touch event that owns the fabric transform\n     * @type Number\n     * @private\n     */\n    mainTouchId: null,\n\n    /**\n     * Adds mouse listeners to canvas\n     * @private\n     */\n    _initEventListeners: function _initEventListeners() {\n      // in case we initialized the class twice. This should not happen normally\n      // but in some kind of applications where the canvas element may be changed\n      // this is a workaround to having double listeners.\n      this.removeListeners();\n\n      this._bindEvents();\n\n      this.addOrRemove(addListener, 'add');\n    },\n\n    /**\n     * return an event prefix pointer or mouse.\n     * @private\n     */\n    _getEventPrefix: function _getEventPrefix() {\n      return this.enablePointerEvents ? 'pointer' : 'mouse';\n    },\n    addOrRemove: function addOrRemove(functor, eventjsFunctor) {\n      var canvasElement = this.upperCanvasEl,\n          eventTypePrefix = this._getEventPrefix();\n\n      functor(fabric.window, 'resize', this._onResize);\n      functor(canvasElement, eventTypePrefix + 'down', this._onMouseDown);\n      functor(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n      functor(canvasElement, eventTypePrefix + 'out', this._onMouseOut);\n      functor(canvasElement, eventTypePrefix + 'enter', this._onMouseEnter);\n      functor(canvasElement, 'wheel', this._onMouseWheel);\n      functor(canvasElement, 'contextmenu', this._onContextMenu);\n      functor(canvasElement, 'dblclick', this._onDoubleClick);\n      functor(canvasElement, 'dragover', this._onDragOver);\n      functor(canvasElement, 'dragenter', this._onDragEnter);\n      functor(canvasElement, 'dragleave', this._onDragLeave);\n      functor(canvasElement, 'drop', this._onDrop);\n\n      if (!this.enablePointerEvents) {\n        functor(canvasElement, 'touchstart', this._onTouchStart, addEventOptions);\n      }\n\n      if (typeof eventjs !== 'undefined' && eventjsFunctor in eventjs) {\n        eventjs[eventjsFunctor](canvasElement, 'gesture', this._onGesture);\n        eventjs[eventjsFunctor](canvasElement, 'drag', this._onDrag);\n        eventjs[eventjsFunctor](canvasElement, 'orientation', this._onOrientationChange);\n        eventjs[eventjsFunctor](canvasElement, 'shake', this._onShake);\n        eventjs[eventjsFunctor](canvasElement, 'longpress', this._onLongPress);\n      }\n    },\n\n    /**\n     * Removes all event listeners\n     */\n    removeListeners: function removeListeners() {\n      this.addOrRemove(removeListener, 'remove'); // if you dispose on a mouseDown, before mouse up, you need to clean document to...\n\n      var eventTypePrefix = this._getEventPrefix();\n\n      removeListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);\n      removeListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);\n      removeListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n      removeListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions);\n    },\n\n    /**\n     * @private\n     */\n    _bindEvents: function _bindEvents() {\n      if (this.eventsBound) {\n        // for any reason we pass here twice we do not want to bind events twice.\n        return;\n      }\n\n      this._onMouseDown = this._onMouseDown.bind(this);\n      this._onTouchStart = this._onTouchStart.bind(this);\n      this._onMouseMove = this._onMouseMove.bind(this);\n      this._onMouseUp = this._onMouseUp.bind(this);\n      this._onTouchEnd = this._onTouchEnd.bind(this);\n      this._onResize = this._onResize.bind(this);\n      this._onGesture = this._onGesture.bind(this);\n      this._onDrag = this._onDrag.bind(this);\n      this._onShake = this._onShake.bind(this);\n      this._onLongPress = this._onLongPress.bind(this);\n      this._onOrientationChange = this._onOrientationChange.bind(this);\n      this._onMouseWheel = this._onMouseWheel.bind(this);\n      this._onMouseOut = this._onMouseOut.bind(this);\n      this._onMouseEnter = this._onMouseEnter.bind(this);\n      this._onContextMenu = this._onContextMenu.bind(this);\n      this._onDoubleClick = this._onDoubleClick.bind(this);\n      this._onDragOver = this._onDragOver.bind(this);\n      this._onDragEnter = this._simpleEventHandler.bind(this, 'dragenter');\n      this._onDragLeave = this._simpleEventHandler.bind(this, 'dragleave');\n      this._onDrop = this._simpleEventHandler.bind(this, 'drop');\n      this.eventsBound = true;\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on Event.js gesture\n     * @param {Event} [self] Inner Event object\n     */\n    _onGesture: function _onGesture(e, self) {\n      this.__onTransformGesture && this.__onTransformGesture(e, self);\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on Event.js drag\n     * @param {Event} [self] Inner Event object\n     */\n    _onDrag: function _onDrag(e, self) {\n      this.__onDrag && this.__onDrag(e, self);\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on wheel event\n     */\n    _onMouseWheel: function _onMouseWheel(e) {\n      this.__onMouseWheel(e);\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onMouseOut: function _onMouseOut(e) {\n      var target = this._hoveredTarget;\n      this.fire('mouse:out', {\n        target: target,\n        e: e\n      });\n      this._hoveredTarget = null;\n      target && target.fire('mouseout', {\n        e: e\n      });\n\n      var _this = this;\n\n      this._hoveredTargets.forEach(function (_target) {\n        _this.fire('mouse:out', {\n          target: target,\n          e: e\n        });\n\n        _target && target.fire('mouseout', {\n          e: e\n        });\n      });\n\n      this._hoveredTargets = [];\n\n      if (this._iTextInstances) {\n        this._iTextInstances.forEach(function (obj) {\n          if (obj.isEditing) {\n            obj.hiddenTextarea.focus();\n          }\n        });\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mouseenter\n     */\n    _onMouseEnter: function _onMouseEnter(e) {\n      // This find target and consequent 'mouse:over' is used to\n      // clear old instances on hovered target.\n      // calling findTarget has the side effect of killing target.__corner.\n      // as a short term fix we are not firing this if we are currently transforming.\n      // as a long term fix we need to separate the action of finding a target with the\n      // side effects we added to it.\n      if (!this.currentTransform && !this.findTarget(e)) {\n        this.fire('mouse:over', {\n          target: null,\n          e: e\n        });\n        this._hoveredTarget = null;\n        this._hoveredTargets = [];\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on Event.js orientation change\n     * @param {Event} [self] Inner Event object\n     */\n    _onOrientationChange: function _onOrientationChange(e, self) {\n      this.__onOrientationChange && this.__onOrientationChange(e, self);\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on Event.js shake\n     * @param {Event} [self] Inner Event object\n     */\n    _onShake: function _onShake(e, self) {\n      this.__onShake && this.__onShake(e, self);\n    },\n\n    /**\n     * @private\n     * @param {Event} [e] Event object fired on Event.js shake\n     * @param {Event} [self] Inner Event object\n     */\n    _onLongPress: function _onLongPress(e, self) {\n      this.__onLongPress && this.__onLongPress(e, self);\n    },\n\n    /**\n     * prevent default to allow drop event to be fired\n     * @private\n     * @param {Event} [e] Event object fired on Event.js shake\n     */\n    _onDragOver: function _onDragOver(e) {\n      e.preventDefault();\n\n      var target = this._simpleEventHandler('dragover', e);\n\n      this._fireEnterLeaveEvents(target, e);\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onContextMenu: function _onContextMenu(e) {\n      if (this.stopContextMenu) {\n        e.stopPropagation();\n        e.preventDefault();\n      }\n\n      return false;\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onDoubleClick: function _onDoubleClick(e) {\n      this._cacheTransformEventData(e);\n\n      this._handleEvent(e, 'dblclick');\n\n      this._resetTransformEventData(e);\n    },\n\n    /**\n     * Return a the id of an event.\n     * returns either the pointerId or the identifier or 0 for the mouse event\n     * @private\n     * @param {Event} evt Event object\n     */\n    getPointerId: function getPointerId(evt) {\n      var changedTouches = evt.changedTouches;\n\n      if (changedTouches) {\n        return changedTouches[0] && changedTouches[0].identifier;\n      }\n\n      if (this.enablePointerEvents) {\n        return evt.pointerId;\n      }\n\n      return -1;\n    },\n\n    /**\n     * Determines if an event has the id of the event that is considered main\n     * @private\n     * @param {evt} event Event object\n     */\n    _isMainEvent: function _isMainEvent(evt) {\n      if (evt.isPrimary === true) {\n        return true;\n      }\n\n      if (evt.isPrimary === false) {\n        return false;\n      }\n\n      if (evt.type === 'touchend' && evt.touches.length === 0) {\n        return true;\n      }\n\n      if (evt.changedTouches) {\n        return evt.changedTouches[0].identifier === this.mainTouchId;\n      }\n\n      return true;\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onTouchStart: function _onTouchStart(e) {\n      e.preventDefault();\n\n      if (this.mainTouchId === null) {\n        this.mainTouchId = this.getPointerId(e);\n      }\n\n      this.__onMouseDown(e);\n\n      this._resetTransformEventData();\n\n      var canvasElement = this.upperCanvasEl,\n          eventTypePrefix = this._getEventPrefix();\n\n      addListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);\n      addListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions); // Unbind mousedown to prevent double triggers from touch devices\n\n      removeListener(canvasElement, eventTypePrefix + 'down', this._onMouseDown);\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onMouseDown: function _onMouseDown(e) {\n      this.__onMouseDown(e);\n\n      this._resetTransformEventData();\n\n      var canvasElement = this.upperCanvasEl,\n          eventTypePrefix = this._getEventPrefix();\n\n      removeListener(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n      addListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);\n      addListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onTouchEnd: function _onTouchEnd(e) {\n      if (e.touches.length > 0) {\n        // if there are still touches stop here\n        return;\n      }\n\n      this.__onMouseUp(e);\n\n      this._resetTransformEventData();\n\n      this.mainTouchId = null;\n\n      var eventTypePrefix = this._getEventPrefix();\n\n      removeListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);\n      removeListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions);\n\n      var _this = this;\n\n      if (this._willAddMouseDown) {\n        clearTimeout(this._willAddMouseDown);\n      }\n\n      this._willAddMouseDown = setTimeout(function () {\n        // Wait 400ms before rebinding mousedown to prevent double triggers\n        // from touch devices\n        addListener(_this.upperCanvasEl, eventTypePrefix + 'down', _this._onMouseDown);\n        _this._willAddMouseDown = 0;\n      }, 400);\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mouseup\n     */\n    _onMouseUp: function _onMouseUp(e) {\n      this.__onMouseUp(e);\n\n      this._resetTransformEventData();\n\n      var canvasElement = this.upperCanvasEl,\n          eventTypePrefix = this._getEventPrefix();\n\n      if (this._isMainEvent(e)) {\n        removeListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);\n        removeListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n        addListener(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousemove\n     */\n    _onMouseMove: function _onMouseMove(e) {\n      !this.allowTouchScrolling && e.preventDefault && e.preventDefault();\n\n      this.__onMouseMove(e);\n    },\n\n    /**\n     * @private\n     */\n    _onResize: function _onResize() {\n      this.calcOffset();\n    },\n\n    /**\n     * Decides whether the canvas should be redrawn in mouseup and mousedown events.\n     * @private\n     * @param {Object} target\n     */\n    _shouldRender: function _shouldRender(target) {\n      var activeObject = this._activeObject;\n\n      if (!!activeObject !== !!target || activeObject && target && activeObject !== target) {\n        // this covers: switch of target, from target to no target, selection of target\n        // multiSelection with key and mouse\n        return true;\n      } else if (activeObject && activeObject.isEditing) {\n        // if we mouse up/down over a editing textbox a cursor change,\n        // there is no need to re render\n        return false;\n      }\n\n      return false;\n    },\n\n    /**\n     * Method that defines the actions when mouse is released on canvas.\n     * The method resets the currentTransform parameters, store the image corner\n     * position in the image object and render the canvas on top.\n     * @private\n     * @param {Event} e Event object fired on mouseup\n     */\n    __onMouseUp: function __onMouseUp(e) {\n      var target,\n          transform = this._currentTransform,\n          groupSelector = this._groupSelector,\n          shouldRender = false,\n          isClick = !groupSelector || groupSelector.left === 0 && groupSelector.top === 0;\n\n      this._cacheTransformEventData(e);\n\n      target = this._target;\n\n      this._handleEvent(e, 'up:before'); // if right/middle click just fire events and return\n      // target undefined will make the _handleEvent search the target\n\n\n      if (checkClick(e, RIGHT_CLICK)) {\n        if (this.fireRightClick) {\n          this._handleEvent(e, 'up', RIGHT_CLICK, isClick);\n        }\n\n        return;\n      }\n\n      if (checkClick(e, MIDDLE_CLICK)) {\n        if (this.fireMiddleClick) {\n          this._handleEvent(e, 'up', MIDDLE_CLICK, isClick);\n        }\n\n        this._resetTransformEventData();\n\n        return;\n      }\n\n      if (this.isDrawingMode && this._isCurrentlyDrawing) {\n        this._onMouseUpInDrawingMode(e);\n\n        return;\n      }\n\n      if (!this._isMainEvent(e)) {\n        return;\n      }\n\n      if (transform) {\n        this._finalizeCurrentTransform(e);\n\n        shouldRender = transform.actionPerformed;\n      }\n\n      if (!isClick) {\n        this._maybeGroupObjects(e);\n\n        shouldRender || (shouldRender = this._shouldRender(target));\n      }\n\n      if (target) {\n        target.isMoving = false;\n      }\n\n      this._setCursorFromEvent(e, target);\n\n      this._handleEvent(e, 'up', LEFT_CLICK, isClick);\n\n      this._groupSelector = null;\n      this._currentTransform = null; // reset the target information about which corner is selected\n\n      target && (target.__corner = 0);\n\n      if (shouldRender) {\n        this.requestRenderAll();\n      } else if (!isClick) {\n        this.renderTop();\n      }\n    },\n\n    /**\n     * @private\n     * Handle event firing for target and subtargets\n     * @param {Event} e event from mouse\n     * @param {String} eventType event to fire (up, down or move)\n     * @return {Fabric.Object} target return the the target found, for internal reasons.\n     */\n    _simpleEventHandler: function _simpleEventHandler(eventType, e) {\n      var target = this.findTarget(e),\n          targets = this.targets,\n          options = {\n        e: e,\n        target: target,\n        subTargets: targets\n      };\n      this.fire(eventType, options);\n      target && target.fire(eventType, options);\n\n      if (!targets) {\n        return target;\n      }\n\n      for (var i = 0; i < targets.length; i++) {\n        targets[i].fire(eventType, options);\n      }\n\n      return target;\n    },\n\n    /**\n     * @private\n     * Handle event firing for target and subtargets\n     * @param {Event} e event from mouse\n     * @param {String} eventType event to fire (up, down or move)\n     * @param {fabric.Object} targetObj receiving event\n     * @param {Number} [button] button used in the event 1 = left, 2 = middle, 3 = right\n     * @param {Boolean} isClick for left button only, indicates that the mouse up happened without move.\n     */\n    _handleEvent: function _handleEvent(e, eventType, button, isClick) {\n      var target = this._target,\n          targets = this.targets || [],\n          options = {\n        e: e,\n        target: target,\n        subTargets: targets,\n        button: button || LEFT_CLICK,\n        isClick: isClick || false,\n        pointer: this._pointer,\n        absolutePointer: this._absolutePointer,\n        transform: this._currentTransform\n      };\n      this.fire('mouse:' + eventType, options);\n      target && target.fire('mouse' + eventType, options);\n\n      for (var i = 0; i < targets.length; i++) {\n        targets[i].fire('mouse' + eventType, options);\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e send the mouse event that generate the finalize down, so it can be used in the event\n     */\n    _finalizeCurrentTransform: function _finalizeCurrentTransform(e) {\n      var transform = this._currentTransform,\n          target = transform.target,\n          eventName,\n          options = {\n        e: e,\n        target: target,\n        transform: transform\n      };\n\n      if (target._scaling) {\n        target._scaling = false;\n      }\n\n      target.setCoords();\n\n      if (transform.actionPerformed || this.stateful && target.hasStateChanged()) {\n        if (transform.actionPerformed) {\n          eventName = this._addEventOptions(options, transform);\n\n          this._fire(eventName, options);\n        }\n\n        this._fire('modified', options);\n      }\n    },\n\n    /**\n     * Mutate option object in order to add by property and give back the event name.\n     * @private\n     * @param {Object} options to mutate\n     * @param {Object} transform to inspect action from\n     */\n    _addEventOptions: function _addEventOptions(options, transform) {\n      // we can probably add more details at low cost\n      // scale change, rotation changes, translation changes\n      var eventName, by;\n\n      switch (transform.action) {\n        case 'scaleX':\n          eventName = 'scaled';\n          by = 'x';\n          break;\n\n        case 'scaleY':\n          eventName = 'scaled';\n          by = 'y';\n          break;\n\n        case 'skewX':\n          eventName = 'skewed';\n          by = 'x';\n          break;\n\n        case 'skewY':\n          eventName = 'skewed';\n          by = 'y';\n          break;\n\n        case 'scale':\n          eventName = 'scaled';\n          by = 'equally';\n          break;\n\n        case 'rotate':\n          eventName = 'rotated';\n          break;\n\n        case 'drag':\n          eventName = 'moved';\n          break;\n      }\n\n      options.by = by;\n      return eventName;\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    _onMouseDownInDrawingMode: function _onMouseDownInDrawingMode(e) {\n      this._isCurrentlyDrawing = true;\n\n      if (this.getActiveObject()) {\n        this.discardActiveObject(e).requestRenderAll();\n      }\n\n      if (this.clipTo) {\n        fabric.util.clipContext(this, this.contextTop);\n      }\n\n      var pointer = this.getPointer(e);\n      this.freeDrawingBrush.onMouseDown(pointer, {\n        e: e,\n        pointer: pointer\n      });\n\n      this._handleEvent(e, 'down');\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mousemove\n     */\n    _onMouseMoveInDrawingMode: function _onMouseMoveInDrawingMode(e) {\n      if (this._isCurrentlyDrawing) {\n        var pointer = this.getPointer(e);\n        this.freeDrawingBrush.onMouseMove(pointer, {\n          e: e,\n          pointer: pointer\n        });\n      }\n\n      this.setCursor(this.freeDrawingCursor);\n\n      this._handleEvent(e, 'move');\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object fired on mouseup\n     */\n    _onMouseUpInDrawingMode: function _onMouseUpInDrawingMode(e) {\n      if (this.clipTo) {\n        this.contextTop.restore();\n      }\n\n      var pointer = this.getPointer(e);\n      this._isCurrentlyDrawing = this.freeDrawingBrush.onMouseUp({\n        e: e,\n        pointer: pointer\n      });\n\n      this._handleEvent(e, 'up');\n    },\n\n    /**\n     * Method that defines the actions when mouse is clicked on canvas.\n     * The method inits the currentTransform parameters and renders all the\n     * canvas so the current image can be placed on the top canvas and the rest\n     * in on the container one.\n     * @private\n     * @param {Event} e Event object fired on mousedown\n     */\n    __onMouseDown: function __onMouseDown(e) {\n      this._cacheTransformEventData(e);\n\n      this._handleEvent(e, 'down:before');\n\n      var target = this._target; // if right click just fire events\n\n      if (checkClick(e, RIGHT_CLICK)) {\n        if (this.fireRightClick) {\n          this._handleEvent(e, 'down', RIGHT_CLICK);\n        }\n\n        return;\n      }\n\n      if (checkClick(e, MIDDLE_CLICK)) {\n        if (this.fireMiddleClick) {\n          this._handleEvent(e, 'down', MIDDLE_CLICK);\n        }\n\n        return;\n      }\n\n      if (this.isDrawingMode) {\n        this._onMouseDownInDrawingMode(e);\n\n        return;\n      }\n\n      if (!this._isMainEvent(e)) {\n        return;\n      } // ignore if some object is being transformed at this moment\n\n\n      if (this._currentTransform) {\n        return;\n      }\n\n      var pointer = this._pointer; // save pointer for check in __onMouseUp event\n\n      this._previousPointer = pointer;\n\n      var shouldRender = this._shouldRender(target),\n          shouldGroup = this._shouldGroup(e, target);\n\n      if (this._shouldClearSelection(e, target)) {\n        this.discardActiveObject(e);\n      } else if (shouldGroup) {\n        this._handleGrouping(e, target);\n\n        target = this._activeObject;\n      }\n\n      if (this.selection && (!target || !target.selectable && !target.isEditing && target !== this._activeObject)) {\n        this._groupSelector = {\n          ex: pointer.x,\n          ey: pointer.y,\n          top: 0,\n          left: 0\n        };\n      }\n\n      if (target) {\n        var alreadySelected = target === this._activeObject;\n\n        if (target.selectable) {\n          this.setActiveObject(target, e);\n        }\n\n        if (target === this._activeObject && (target.__corner || !shouldGroup)) {\n          this._setupCurrentTransform(e, target, alreadySelected);\n        }\n      }\n\n      this._handleEvent(e, 'down'); // we must renderAll so that we update the visuals\n\n\n      (shouldRender || shouldGroup) && this.requestRenderAll();\n    },\n\n    /**\n     * reset cache form common information needed during event processing\n     * @private\n     */\n    _resetTransformEventData: function _resetTransformEventData() {\n      this._target = null;\n      this._pointer = null;\n      this._absolutePointer = null;\n    },\n\n    /**\n     * Cache common information needed during event processing\n     * @private\n     * @param {Event} e Event object fired on event\n     */\n    _cacheTransformEventData: function _cacheTransformEventData(e) {\n      // reset in order to avoid stale caching\n      this._resetTransformEventData();\n\n      this._pointer = this.getPointer(e, true);\n      this._absolutePointer = this.restorePointerVpt(this._pointer);\n      this._target = this._currentTransform ? this._currentTransform.target : this.findTarget(e) || null;\n    },\n\n    /**\n     * @private\n     */\n    _beforeTransform: function _beforeTransform(e) {\n      var t = this._currentTransform;\n      this.stateful && t.target.saveState();\n      this.fire('before:transform', {\n        e: e,\n        transform: t\n      }); // determine if it's a drag or rotate case\n\n      if (t.corner) {\n        this.onBeforeScaleRotate(t.target);\n      }\n    },\n\n    /**\n     * Method that defines the actions when mouse is hovering the canvas.\n     * The currentTransform parameter will define whether the user is rotating/scaling/translating\n     * an image or neither of them (only hovering). A group selection is also possible and would cancel\n     * all any other type of action.\n     * In case of an image transformation only the top canvas will be rendered.\n     * @private\n     * @param {Event} e Event object fired on mousemove\n     */\n    __onMouseMove: function __onMouseMove(e) {\n      this._handleEvent(e, 'move:before');\n\n      this._cacheTransformEventData(e);\n\n      var target, pointer;\n\n      if (this.isDrawingMode) {\n        this._onMouseMoveInDrawingMode(e);\n\n        return;\n      }\n\n      if (!this._isMainEvent(e)) {\n        return;\n      }\n\n      var groupSelector = this._groupSelector; // We initially clicked in an empty area, so we draw a box for multiple selection\n\n      if (groupSelector) {\n        pointer = this._pointer;\n        groupSelector.left = pointer.x - groupSelector.ex;\n        groupSelector.top = pointer.y - groupSelector.ey;\n        this.renderTop();\n      } else if (!this._currentTransform) {\n        target = this.findTarget(e) || null;\n\n        this._setCursorFromEvent(e, target);\n\n        this._fireOverOutEvents(target, e);\n      } else {\n        this._transformObject(e);\n      }\n\n      this._handleEvent(e, 'move');\n\n      this._resetTransformEventData();\n    },\n\n    /**\n     * Manage the mouseout, mouseover events for the fabric object on the canvas\n     * @param {Fabric.Object} target the target where the target from the mousemove event\n     * @param {Event} e Event object fired on mousemove\n     * @private\n     */\n    _fireOverOutEvents: function _fireOverOutEvents(target, e) {\n      var _hoveredTarget = this._hoveredTarget,\n          _hoveredTargets = this._hoveredTargets,\n          targets = this.targets,\n          length = Math.max(_hoveredTargets.length, targets.length);\n      this.fireSyntheticInOutEvents(target, e, {\n        oldTarget: _hoveredTarget,\n        evtOut: 'mouseout',\n        canvasEvtOut: 'mouse:out',\n        evtIn: 'mouseover',\n        canvasEvtIn: 'mouse:over'\n      });\n\n      for (var i = 0; i < length; i++) {\n        this.fireSyntheticInOutEvents(targets[i], e, {\n          oldTarget: _hoveredTargets[i],\n          evtOut: 'mouseout',\n          evtIn: 'mouseover'\n        });\n      }\n\n      this._hoveredTarget = target;\n      this._hoveredTargets = this.targets.concat();\n    },\n\n    /**\n     * Manage the dragEnter, dragLeave events for the fabric objects on the canvas\n     * @param {Fabric.Object} target the target where the target from the onDrag event\n     * @param {Event} e Event object fired on ondrag\n     * @private\n     */\n    _fireEnterLeaveEvents: function _fireEnterLeaveEvents(target, e) {\n      var _draggedoverTarget = this._draggedoverTarget,\n          _hoveredTargets = this._hoveredTargets,\n          targets = this.targets,\n          length = Math.max(_hoveredTargets.length, targets.length);\n      this.fireSyntheticInOutEvents(target, e, {\n        oldTarget: _draggedoverTarget,\n        evtOut: 'dragleave',\n        evtIn: 'dragenter'\n      });\n\n      for (var i = 0; i < length; i++) {\n        this.fireSyntheticInOutEvents(targets[i], e, {\n          oldTarget: _hoveredTargets[i],\n          evtOut: 'dragleave',\n          evtIn: 'dragenter'\n        });\n      }\n\n      this._draggedoverTarget = target;\n    },\n\n    /**\n     * Manage the synthetic in/out events for the fabric objects on the canvas\n     * @param {Fabric.Object} target the target where the target from the supported events\n     * @param {Event} e Event object fired\n     * @param {Object} config configuration for the function to work\n     * @param {String} config.targetName property on the canvas where the old target is stored\n     * @param {String} [config.canvasEvtOut] name of the event to fire at canvas level for out\n     * @param {String} config.evtOut name of the event to fire for out\n     * @param {String} [config.canvasEvtIn] name of the event to fire at canvas level for in\n     * @param {String} config.evtIn name of the event to fire for in\n     * @private\n     */\n    fireSyntheticInOutEvents: function fireSyntheticInOutEvents(target, e, config) {\n      var inOpt,\n          outOpt,\n          oldTarget = config.oldTarget,\n          outFires,\n          inFires,\n          targetChanged = oldTarget !== target,\n          canvasEvtIn = config.canvasEvtIn,\n          canvasEvtOut = config.canvasEvtOut;\n\n      if (targetChanged) {\n        inOpt = {\n          e: e,\n          target: target,\n          previousTarget: oldTarget\n        };\n        outOpt = {\n          e: e,\n          target: oldTarget,\n          nextTarget: target\n        };\n      }\n\n      inFires = target && targetChanged;\n      outFires = oldTarget && targetChanged;\n\n      if (outFires) {\n        canvasEvtOut && this.fire(canvasEvtOut, outOpt);\n        oldTarget.fire(config.evtOut, outOpt);\n      }\n\n      if (inFires) {\n        canvasEvtIn && this.fire(canvasEvtIn, inOpt);\n        target.fire(config.evtIn, inOpt);\n      }\n    },\n\n    /**\n     * Method that defines actions when an Event Mouse Wheel\n     * @param {Event} e Event object fired on mouseup\n     */\n    __onMouseWheel: function __onMouseWheel(e) {\n      this._cacheTransformEventData(e);\n\n      this._handleEvent(e, 'wheel');\n\n      this._resetTransformEventData();\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event fired on mousemove\n     */\n    _transformObject: function _transformObject(e) {\n      var pointer = this.getPointer(e),\n          transform = this._currentTransform;\n      transform.reset = false;\n      transform.target.isMoving = true;\n      transform.shiftKey = e.shiftKey;\n      transform.altKey = e[this.centeredKey];\n\n      this._beforeScaleTransform(e, transform);\n\n      this._performTransformAction(e, transform, pointer);\n\n      transform.actionPerformed && this.requestRenderAll();\n    },\n\n    /**\n     * @private\n     */\n    _performTransformAction: function _performTransformAction(e, transform, pointer) {\n      var x = pointer.x,\n          y = pointer.y,\n          action = transform.action,\n          actionPerformed = false,\n          options = {\n        target: transform.target,\n        e: e,\n        transform: transform,\n        pointer: pointer\n      };\n\n      if (action === 'rotate') {\n        (actionPerformed = this._rotateObject(x, y)) && this._fire('rotating', options);\n      } else if (action === 'scale') {\n        (actionPerformed = this._onScale(e, transform, x, y)) && this._fire('scaling', options);\n      } else if (action === 'scaleX') {\n        (actionPerformed = this._scaleObject(x, y, 'x')) && this._fire('scaling', options);\n      } else if (action === 'scaleY') {\n        (actionPerformed = this._scaleObject(x, y, 'y')) && this._fire('scaling', options);\n      } else if (action === 'skewX') {\n        (actionPerformed = this._skewObject(x, y, 'x')) && this._fire('skewing', options);\n      } else if (action === 'skewY') {\n        (actionPerformed = this._skewObject(x, y, 'y')) && this._fire('skewing', options);\n      } else {\n        actionPerformed = this._translateObject(x, y);\n\n        if (actionPerformed) {\n          this._fire('moving', options);\n\n          this.setCursor(options.target.moveCursor || this.moveCursor);\n        }\n      }\n\n      transform.actionPerformed = transform.actionPerformed || actionPerformed;\n    },\n\n    /**\n     * @private\n     */\n    _fire: function _fire(eventName, options) {\n      this.fire('object:' + eventName, options);\n      options.target.fire(eventName, options);\n    },\n\n    /**\n     * @private\n     */\n    _beforeScaleTransform: function _beforeScaleTransform(e, transform) {\n      if (transform.action === 'scale' || transform.action === 'scaleX' || transform.action === 'scaleY') {\n        var centerTransform = this._shouldCenterTransform(transform.target); // Switch from a normal resize to center-based\n\n\n        if (centerTransform && (transform.originX !== 'center' || transform.originY !== 'center') || !centerTransform && transform.originX === 'center' && transform.originY === 'center') {\n          this._resetCurrentTransform();\n\n          transform.reset = true;\n        }\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {Object} transform current transform\n     * @param {Number} x mouse position x from origin\n     * @param {Number} y mouse position y from origin\n     * @return {Boolean} true if the scaling occurred\n     */\n    _onScale: function _onScale(e, transform, x, y) {\n      if (this._isUniscalePossible(e, transform.target)) {\n        transform.currentAction = 'scale';\n        return this._scaleObject(x, y);\n      } else {\n        // Switch from a normal resize to proportional\n        if (!transform.reset && transform.currentAction === 'scale') {\n          this._resetCurrentTransform();\n        }\n\n        transform.currentAction = 'scaleEqually';\n        return this._scaleObject(x, y, 'equally');\n      }\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {fabric.Object} target current target\n     * @return {Boolean} true if unproportional scaling is possible\n     */\n    _isUniscalePossible: function _isUniscalePossible(e, target) {\n      return (e[this.uniScaleKey] || this.uniScaleTransform) && !target.get('lockUniScaling');\n    },\n\n    /**\n     * Sets the cursor depending on where the canvas is being hovered.\n     * Note: very buggy in Opera\n     * @param {Event} e Event object\n     * @param {Object} target Object that the mouse is hovering, if so.\n     */\n    _setCursorFromEvent: function _setCursorFromEvent(e, target) {\n      if (!target) {\n        this.setCursor(this.defaultCursor);\n        return false;\n      }\n\n      var hoverCursor = target.hoverCursor || this.hoverCursor,\n          activeSelection = this._activeObject && this._activeObject.type === 'activeSelection' ? this._activeObject : null,\n          // only show proper corner when group selection is not active\n      corner = (!activeSelection || !activeSelection.contains(target)) && target._findTargetCorner(this.getPointer(e, true));\n\n      if (!corner) {\n        if (target.subTargetCheck) {\n          // hoverCursor should come from top-most subTarget,\n          // so we walk the array backwards\n          this.targets.concat().reverse().map(function (_target) {\n            hoverCursor = _target.hoverCursor || hoverCursor;\n          });\n        }\n\n        this.setCursor(hoverCursor);\n      } else {\n        this.setCursor(this.getCornerCursor(corner, target, e));\n      }\n    },\n\n    /**\n     * @private\n     */\n    getCornerCursor: function getCornerCursor(corner, target, e) {\n      if (this.actionIsDisabled(corner, target, e)) {\n        return this.notAllowedCursor;\n      } else if (corner in cursorOffset) {\n        return this._getRotatedCornerCursor(corner, target, e);\n      } else if (corner === 'mtr' && target.hasRotatingPoint) {\n        return this.rotationCursor;\n      } else {\n        return this.defaultCursor;\n      }\n    },\n    actionIsDisabled: function actionIsDisabled(corner, target, e) {\n      if (corner === 'mt' || corner === 'mb') {\n        return e[this.altActionKey] ? target.lockSkewingX : target.lockScalingY;\n      } else if (corner === 'ml' || corner === 'mr') {\n        return e[this.altActionKey] ? target.lockSkewingY : target.lockScalingX;\n      } else if (corner === 'mtr') {\n        return target.lockRotation;\n      } else {\n        return this._isUniscalePossible(e, target) ? target.lockScalingX && target.lockScalingY : target.lockScalingX || target.lockScalingY;\n      }\n    },\n\n    /**\n     * @private\n     */\n    _getRotatedCornerCursor: function _getRotatedCornerCursor(corner, target, e) {\n      var n = Math.round(target.angle % 360 / 45);\n\n      if (n < 0) {\n        n += 8; // full circle ahead\n      }\n\n      n += cursorOffset[corner];\n\n      if (e[this.altActionKey] && cursorOffset[corner] % 2 === 0) {\n        //if we are holding shift and we are on a mx corner...\n        n += 2;\n      } // normalize n to be from 0 to 7\n\n\n      n %= 8;\n      return this.cursorMap[n];\n    }\n  });\n})();\n\n(function () {\n  var min = Math.min,\n      max = Math.max;\n  fabric.util.object.extend(fabric.Canvas.prototype,\n  /** @lends fabric.Canvas.prototype */\n  {\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {fabric.Object} target\n     * @return {Boolean}\n     */\n    _shouldGroup: function _shouldGroup(e, target) {\n      var activeObject = this._activeObject;\n      return activeObject && this._isSelectionKeyPressed(e) && target && target.selectable && this.selection && (activeObject !== target || activeObject.type === 'activeSelection') && !target.onSelect({\n        e: e\n      });\n    },\n\n    /**\n     * @private\n     * @param {Event} e Event object\n     * @param {fabric.Object} target\n     */\n    _handleGrouping: function _handleGrouping(e, target) {\n      var activeObject = this._activeObject; // avoid multi select when shift click on a corner\n\n      if (activeObject.__corner) {\n        return;\n      }\n\n      if (target === activeObject) {\n        // if it's a group, find target again, using activeGroup objects\n        target = this.findTarget(e, true); // if even object is not found or we are on activeObjectCorner, bail out\n\n        if (!target || !target.selectable) {\n          return;\n        }\n      }\n\n      if (activeObject && activeObject.type === 'activeSelection') {\n        this._updateActiveSelection(target, e);\n      } else {\n        this._createActiveSelection(target, e);\n      }\n    },\n\n    /**\n     * @private\n     */\n    _updateActiveSelection: function _updateActiveSelection(target, e) {\n      var activeSelection = this._activeObject,\n          currentActiveObjects = activeSelection._objects.slice(0);\n\n      if (activeSelection.contains(target)) {\n        activeSelection.removeWithUpdate(target);\n        this._hoveredTarget = target;\n        this._hoveredTargets = this.targets.concat();\n\n        if (activeSelection.size() === 1) {\n          // activate last remaining object\n          this._setActiveObject(activeSelection.item(0), e);\n        }\n      } else {\n        activeSelection.addWithUpdate(target);\n        this._hoveredTarget = activeSelection;\n        this._hoveredTargets = this.targets.concat();\n      }\n\n      this._fireSelectionEvents(currentActiveObjects, e);\n    },\n\n    /**\n     * @private\n     */\n    _createActiveSelection: function _createActiveSelection(target, e) {\n      var currentActives = this.getActiveObjects(),\n          group = this._createGroup(target);\n\n      this._hoveredTarget = group; // ISSUE 4115: should we consider subTargets here?\n      // this._hoveredTargets = [];\n      // this._hoveredTargets = this.targets.concat();\n\n      this._setActiveObject(group, e);\n\n      this._fireSelectionEvents(currentActives, e);\n    },\n\n    /**\n     * @private\n     * @param {Object} target\n     */\n    _createGroup: function _createGroup(target) {\n      var objects = this._objects,\n          isActiveLower = objects.indexOf(this._activeObject) < objects.indexOf(target),\n          groupObjects = isActiveLower ? [this._activeObject, target] : [target, this._activeObject];\n      this._activeObject.isEditing && this._activeObject.exitEditing();\n      return new fabric.ActiveSelection(groupObjects, {\n        canvas: this\n      });\n    },\n\n    /**\n     * @private\n     * @param {Event} e mouse event\n     */\n    _groupSelectedObjects: function _groupSelectedObjects(e) {\n      var group = this._collectObjects(e),\n          aGroup; // do not create group for 1 element only\n\n\n      if (group.length === 1) {\n        this.setActiveObject(group[0], e);\n      } else if (group.length > 1) {\n        aGroup = new fabric.ActiveSelection(group.reverse(), {\n          canvas: this\n        });\n        this.setActiveObject(aGroup, e);\n      }\n    },\n\n    /**\n     * @private\n     */\n    _collectObjects: function _collectObjects(e) {\n      var group = [],\n          currentObject,\n          x1 = this._groupSelector.ex,\n          y1 = this._groupSelector.ey,\n          x2 = x1 + this._groupSelector.left,\n          y2 = y1 + this._groupSelector.top,\n          selectionX1Y1 = new fabric.Point(min(x1, x2), min(y1, y2)),\n          selectionX2Y2 = new fabric.Point(max(x1, x2), max(y1, y2)),\n          allowIntersect = !this.selectionFullyContained,\n          isClick = x1 === x2 && y1 === y2; // we iterate reverse order to collect top first in case of click.\n\n      for (var i = this._objects.length; i--;) {\n        currentObject = this._objects[i];\n\n        if (!currentObject || !currentObject.selectable || !currentObject.visible) {\n          continue;\n        }\n\n        if (allowIntersect && currentObject.intersectsWithRect(selectionX1Y1, selectionX2Y2) || currentObject.isContainedWithinRect(selectionX1Y1, selectionX2Y2) || allowIntersect && currentObject.containsPoint(selectionX1Y1) || allowIntersect && currentObject.containsPoint(selectionX2Y2)) {\n          group.push(currentObject); // only add one object if it's a click\n\n          if (isClick) {\n            break;\n          }\n        }\n      }\n\n      if (group.length > 1) {\n        group = group.filter(function (object) {\n          return !object.onSelect({\n            e: e\n          });\n        });\n      }\n\n      return group;\n    },\n\n    /**\n     * @private\n     */\n    _maybeGroupObjects: function _maybeGroupObjects(e) {\n      if (this.selection && this._groupSelector) {\n        this._groupSelectedObjects(e);\n      }\n\n      this.setCursor(this.defaultCursor); // clear selection and current transformation\n\n      this._groupSelector = null;\n    }\n  });\n})();\n\n(function () {\n  fabric.util.object.extend(fabric.StaticCanvas.prototype,\n  /** @lends fabric.StaticCanvas.prototype */\n  {\n    /**\n     * Exports canvas element to a dataurl image. Note that when multiplier is used, cropping is scaled appropriately\n     * @param {Object} [options] Options object\n     * @param {String} [options.format=png] The format of the output image. Either \"jpeg\" or \"png\"\n     * @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.\n     * @param {Number} [options.multiplier=1] Multiplier to scale by, to have consistent\n     * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14\n     * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14\n     * @param {Number} [options.width] Cropping width. Introduced in v1.2.14\n     * @param {Number} [options.height] Cropping height. Introduced in v1.2.14\n     * @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 2.0.0\n     * @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format\n     * @see {@link http://jsfiddle.net/fabricjs/NfZVb/|jsFiddle demo}\n     * @example <caption>Generate jpeg dataURL with lower quality</caption>\n     * var dataURL = canvas.toDataURL({\n     *   format: 'jpeg',\n     *   quality: 0.8\n     * });\n     * @example <caption>Generate cropped png dataURL (clipping of canvas)</caption>\n     * var dataURL = canvas.toDataURL({\n     *   format: 'png',\n     *   left: 100,\n     *   top: 100,\n     *   width: 200,\n     *   height: 200\n     * });\n     * @example <caption>Generate double scaled png dataURL</caption>\n     * var dataURL = canvas.toDataURL({\n     *   format: 'png',\n     *   multiplier: 2\n     * });\n     */\n    toDataURL: function toDataURL(options) {\n      options || (options = {});\n      var format = options.format || 'png',\n          quality = options.quality || 1,\n          multiplier = (options.multiplier || 1) * (options.enableRetinaScaling ? this.getRetinaScaling() : 1),\n          canvasEl = this.toCanvasElement(multiplier, options);\n      return fabric.util.toDataURL(canvasEl, format, quality);\n    },\n\n    /**\n     * Create a new HTMLCanvas element painted with the current canvas content.\n     * No need to resize the actual one or repaint it.\n     * Will transfer object ownership to a new canvas, paint it, and set everything back.\n     * This is an intermediary step used to get to a dataUrl but also it is useful to\n     * create quick image copies of a canvas without passing for the dataUrl string\n     * @param {Number} [multiplier] a zoom factor.\n     * @param {Object} [cropping] Cropping informations\n     * @param {Number} [cropping.left] Cropping left offset.\n     * @param {Number} [cropping.top] Cropping top offset.\n     * @param {Number} [cropping.width] Cropping width.\n     * @param {Number} [cropping.height] Cropping height.\n     */\n    toCanvasElement: function toCanvasElement(multiplier, cropping) {\n      multiplier = multiplier || 1;\n      cropping = cropping || {};\n      var scaledWidth = (cropping.width || this.width) * multiplier,\n          scaledHeight = (cropping.height || this.height) * multiplier,\n          zoom = this.getZoom(),\n          originalWidth = this.width,\n          originalHeight = this.height,\n          newZoom = zoom * multiplier,\n          vp = this.viewportTransform,\n          translateX = (vp[4] - (cropping.left || 0)) * multiplier,\n          translateY = (vp[5] - (cropping.top || 0)) * multiplier,\n          originalInteractive = this.interactive,\n          newVp = [newZoom, 0, 0, newZoom, translateX, translateY],\n          originalRetina = this.enableRetinaScaling,\n          canvasEl = fabric.util.createCanvasElement(),\n          originalContextTop = this.contextTop;\n      canvasEl.width = scaledWidth;\n      canvasEl.height = scaledHeight;\n      this.contextTop = null;\n      this.enableRetinaScaling = false;\n      this.interactive = false;\n      this.viewportTransform = newVp;\n      this.width = scaledWidth;\n      this.height = scaledHeight;\n      this.calcViewportBoundaries();\n      this.renderCanvas(canvasEl.getContext('2d'), this._objects);\n      this.viewportTransform = vp;\n      this.width = originalWidth;\n      this.height = originalHeight;\n      this.calcViewportBoundaries();\n      this.interactive = originalInteractive;\n      this.enableRetinaScaling = originalRetina;\n      this.contextTop = originalContextTop;\n      return canvasEl;\n    }\n  });\n})();\n\nfabric.util.object.extend(fabric.StaticCanvas.prototype,\n/** @lends fabric.StaticCanvas.prototype */\n{\n  /**\n   * Populates canvas with data from the specified dataless JSON.\n   * JSON format must conform to the one of {@link fabric.Canvas#toDatalessJSON}\n   * @deprecated since 1.2.2\n   * @param {String|Object} json JSON string or object\n   * @param {Function} callback Callback, invoked when json is parsed\n   *                            and corresponding objects (e.g: {@link fabric.Image})\n   *                            are initialized\n   * @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.\n   * @return {fabric.Canvas} instance\n   * @chainable\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization}\n   */\n  loadFromDatalessJSON: function loadFromDatalessJSON(json, callback, reviver) {\n    return this.loadFromJSON(json, callback, reviver);\n  },\n\n  /**\n   * Populates canvas with data from the specified JSON.\n   * JSON format must conform to the one of {@link fabric.Canvas#toJSON}\n   * @param {String|Object} json JSON string or object\n   * @param {Function} callback Callback, invoked when json is parsed\n   *                            and corresponding objects (e.g: {@link fabric.Image})\n   *                            are initialized\n   * @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.\n   * @return {fabric.Canvas} instance\n   * @chainable\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization}\n   * @see {@link http://jsfiddle.net/fabricjs/fmgXt/|jsFiddle demo}\n   * @example <caption>loadFromJSON</caption>\n   * canvas.loadFromJSON(json, canvas.renderAll.bind(canvas));\n   * @example <caption>loadFromJSON with reviver</caption>\n   * canvas.loadFromJSON(json, canvas.renderAll.bind(canvas), function(o, object) {\n   *   // `o` = json object\n   *   // `object` = fabric.Object instance\n   *   // ... do some stuff ...\n   * });\n   */\n  loadFromJSON: function loadFromJSON(json, callback, reviver) {\n    if (!json) {\n      return;\n    } // serialize if it wasn't already\n\n\n    var serialized = typeof json === 'string' ? JSON.parse(json) : fabric.util.object.clone(json);\n\n    var _this = this,\n        clipPath = serialized.clipPath,\n        renderOnAddRemove = this.renderOnAddRemove;\n\n    this.renderOnAddRemove = false;\n    delete serialized.clipPath;\n\n    this._enlivenObjects(serialized.objects, function (enlivenedObjects) {\n      _this.clear();\n\n      _this._setBgOverlay(serialized, function () {\n        if (clipPath) {\n          _this._enlivenObjects([clipPath], function (enlivenedCanvasClip) {\n            _this.clipPath = enlivenedCanvasClip[0];\n\n            _this.__setupCanvas.call(_this, serialized, enlivenedObjects, renderOnAddRemove, callback);\n          });\n        } else {\n          _this.__setupCanvas.call(_this, serialized, enlivenedObjects, renderOnAddRemove, callback);\n        }\n      });\n    }, reviver);\n\n    return this;\n  },\n\n  /**\n   * @private\n   * @param {Object} serialized Object with background and overlay information\n   * @param {Array} restored canvas objects\n   * @param {Function} cached renderOnAddRemove callback\n   * @param {Function} callback Invoked after all background and overlay images/patterns loaded\n   */\n  __setupCanvas: function __setupCanvas(serialized, enlivenedObjects, renderOnAddRemove, callback) {\n    var _this = this;\n\n    enlivenedObjects.forEach(function (obj, index) {\n      // we splice the array just in case some custom classes restored from JSON\n      // will add more object to canvas at canvas init.\n      _this.insertAt(obj, index);\n    });\n    this.renderOnAddRemove = renderOnAddRemove; // remove parts i cannot set as options\n\n    delete serialized.objects;\n    delete serialized.backgroundImage;\n    delete serialized.overlayImage;\n    delete serialized.background;\n    delete serialized.overlay; // this._initOptions does too many things to just\n    // call it. Normally loading an Object from JSON\n    // create the Object instance. Here the Canvas is\n    // already an instance and we are just loading things over it\n\n    this._setOptions(serialized);\n\n    this.renderAll();\n    callback && callback();\n  },\n\n  /**\n   * @private\n   * @param {Object} serialized Object with background and overlay information\n   * @param {Function} callback Invoked after all background and overlay images/patterns loaded\n   */\n  _setBgOverlay: function _setBgOverlay(serialized, callback) {\n    var loaded = {\n      backgroundColor: false,\n      overlayColor: false,\n      backgroundImage: false,\n      overlayImage: false\n    };\n\n    if (!serialized.backgroundImage && !serialized.overlayImage && !serialized.background && !serialized.overlay) {\n      callback && callback();\n      return;\n    }\n\n    var cbIfLoaded = function cbIfLoaded() {\n      if (loaded.backgroundImage && loaded.overlayImage && loaded.backgroundColor && loaded.overlayColor) {\n        callback && callback();\n      }\n    };\n\n    this.__setBgOverlay('backgroundImage', serialized.backgroundImage, loaded, cbIfLoaded);\n\n    this.__setBgOverlay('overlayImage', serialized.overlayImage, loaded, cbIfLoaded);\n\n    this.__setBgOverlay('backgroundColor', serialized.background, loaded, cbIfLoaded);\n\n    this.__setBgOverlay('overlayColor', serialized.overlay, loaded, cbIfLoaded);\n  },\n\n  /**\n   * @private\n   * @param {String} property Property to set (backgroundImage, overlayImage, backgroundColor, overlayColor)\n   * @param {(Object|String)} value Value to set\n   * @param {Object} loaded Set loaded property to true if property is set\n   * @param {Object} callback Callback function to invoke after property is set\n   */\n  __setBgOverlay: function __setBgOverlay(property, value, loaded, callback) {\n    var _this = this;\n\n    if (!value) {\n      loaded[property] = true;\n      callback && callback();\n      return;\n    }\n\n    if (property === 'backgroundImage' || property === 'overlayImage') {\n      fabric.util.enlivenObjects([value], function (enlivedObject) {\n        _this[property] = enlivedObject[0];\n        loaded[property] = true;\n        callback && callback();\n      });\n    } else {\n      this['set' + fabric.util.string.capitalize(property, true)](value, function () {\n        loaded[property] = true;\n        callback && callback();\n      });\n    }\n  },\n\n  /**\n   * @private\n   * @param {Array} objects\n   * @param {Function} callback\n   * @param {Function} [reviver]\n   */\n  _enlivenObjects: function _enlivenObjects(objects, callback, reviver) {\n    if (!objects || objects.length === 0) {\n      callback && callback([]);\n      return;\n    }\n\n    fabric.util.enlivenObjects(objects, function (enlivenedObjects) {\n      callback && callback(enlivenedObjects);\n    }, null, reviver);\n  },\n\n  /**\n   * @private\n   * @param {String} format\n   * @param {Function} callback\n   */\n  _toDataURL: function _toDataURL(format, callback) {\n    this.clone(function (clone) {\n      callback(clone.toDataURL(format));\n    });\n  },\n\n  /**\n   * @private\n   * @param {String} format\n   * @param {Number} multiplier\n   * @param {Function} callback\n   */\n  _toDataURLWithMultiplier: function _toDataURLWithMultiplier(format, multiplier, callback) {\n    this.clone(function (clone) {\n      callback(clone.toDataURLWithMultiplier(format, multiplier));\n    });\n  },\n\n  /**\n   * Clones canvas instance\n   * @param {Object} [callback] Receives cloned instance as a first argument\n   * @param {Array} [properties] Array of properties to include in the cloned canvas and children\n   */\n  clone: function clone(callback, properties) {\n    var data = JSON.stringify(this.toJSON(properties));\n    this.cloneWithoutData(function (clone) {\n      clone.loadFromJSON(data, function () {\n        callback && callback(clone);\n      });\n    });\n  },\n\n  /**\n   * Clones canvas instance without cloning existing data.\n   * This essentially copies canvas dimensions, clipping properties, etc.\n   * but leaves data empty (so that you can populate it with your own)\n   * @param {Object} [callback] Receives cloned instance as a first argument\n   */\n  cloneWithoutData: function cloneWithoutData(callback) {\n    var el = fabric.util.createCanvasElement();\n    el.width = this.width;\n    el.height = this.height;\n    var clone = new fabric.Canvas(el);\n    clone.clipTo = this.clipTo;\n\n    if (this.backgroundImage) {\n      clone.setBackgroundImage(this.backgroundImage.src, function () {\n        clone.renderAll();\n        callback && callback(clone);\n      });\n      clone.backgroundImageOpacity = this.backgroundImageOpacity;\n      clone.backgroundImageStretch = this.backgroundImageStretch;\n    } else {\n      callback && callback(clone);\n    }\n  }\n});\n/**\n * Adds support for multi-touch gestures using the Event.js library.\n * Fires the following custom events:\n * - touch:gesture\n * - touch:drag\n * - touch:orientation\n * - touch:shake\n * - touch:longpress\n */\n\n(function () {\n  var degreesToRadians = fabric.util.degreesToRadians,\n      radiansToDegrees = fabric.util.radiansToDegrees;\n  fabric.util.object.extend(fabric.Canvas.prototype,\n  /** @lends fabric.Canvas.prototype */\n  {\n    /**\n     * Method that defines actions when an Event.js gesture is detected on an object. Currently only supports\n     * 2 finger gestures.\n     * @param {Event} e Event object by Event.js\n     * @param {Event} self Event proxy object by Event.js\n     */\n    __onTransformGesture: function __onTransformGesture(e, self) {\n      if (this.isDrawingMode || !e.touches || e.touches.length !== 2 || 'gesture' !== self.gesture) {\n        return;\n      }\n\n      var target = this.findTarget(e);\n\n      if ('undefined' !== typeof target) {\n        this.__gesturesParams = {\n          e: e,\n          self: self,\n          target: target\n        };\n\n        this.__gesturesRenderer();\n      }\n\n      this.fire('touch:gesture', {\n        target: target,\n        e: e,\n        self: self\n      });\n    },\n    __gesturesParams: null,\n    __gesturesRenderer: function __gesturesRenderer() {\n      if (this.__gesturesParams === null || this._currentTransform === null) {\n        return;\n      }\n\n      var self = this.__gesturesParams.self,\n          t = this._currentTransform,\n          e = this.__gesturesParams.e;\n      t.action = 'scale';\n      t.originX = t.originY = 'center';\n\n      this._scaleObjectBy(self.scale, e);\n\n      if (self.rotation !== 0) {\n        t.action = 'rotate';\n\n        this._rotateObjectByAngle(self.rotation, e);\n      }\n\n      this.requestRenderAll();\n      t.action = 'drag';\n    },\n\n    /**\n     * Method that defines actions when an Event.js drag is detected.\n     *\n     * @param {Event} e Event object by Event.js\n     * @param {Event} self Event proxy object by Event.js\n     */\n    __onDrag: function __onDrag(e, self) {\n      this.fire('touch:drag', {\n        e: e,\n        self: self\n      });\n    },\n\n    /**\n     * Method that defines actions when an Event.js orientation event is detected.\n     *\n     * @param {Event} e Event object by Event.js\n     * @param {Event} self Event proxy object by Event.js\n     */\n    __onOrientationChange: function __onOrientationChange(e, self) {\n      this.fire('touch:orientation', {\n        e: e,\n        self: self\n      });\n    },\n\n    /**\n     * Method that defines actions when an Event.js shake event is detected.\n     *\n     * @param {Event} e Event object by Event.js\n     * @param {Event} self Event proxy object by Event.js\n     */\n    __onShake: function __onShake(e, self) {\n      this.fire('touch:shake', {\n        e: e,\n        self: self\n      });\n    },\n\n    /**\n     * Method that defines actions when an Event.js longpress event is detected.\n     *\n     * @param {Event} e Event object by Event.js\n     * @param {Event} self Event proxy object by Event.js\n     */\n    __onLongPress: function __onLongPress(e, self) {\n      this.fire('touch:longpress', {\n        e: e,\n        self: self\n      });\n    },\n\n    /**\n     * Scales an object by a factor\n     * @param {Number} s The scale factor to apply to the current scale level\n     * @param {Event} e Event object by Event.js\n     */\n    _scaleObjectBy: function _scaleObjectBy(s, e) {\n      var t = this._currentTransform,\n          target = t.target,\n          lockScalingX = target.get('lockScalingX'),\n          lockScalingY = target.get('lockScalingY');\n\n      if (lockScalingX && lockScalingY) {\n        return;\n      }\n\n      target._scaling = true;\n\n      var constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY),\n          dim = target._getTransformedDimensions();\n\n      this._setObjectScale(new fabric.Point(t.scaleX * dim.x * s / target.scaleX, t.scaleY * dim.y * s / target.scaleY), t, lockScalingX, lockScalingY, null, target.get('lockScalingFlip'), dim);\n\n      target.setPositionByOrigin(constraintPosition, t.originX, t.originY);\n\n      this._fire('scaling', {\n        target: target,\n        e: e,\n        transform: t\n      });\n    },\n\n    /**\n     * Rotates object by an angle\n     * @param {Number} curAngle The angle of rotation in degrees\n     * @param {Event} e Event object by Event.js\n     */\n    _rotateObjectByAngle: function _rotateObjectByAngle(curAngle, e) {\n      var t = this._currentTransform;\n\n      if (t.target.get('lockRotation')) {\n        return;\n      }\n\n      t.target.rotate(radiansToDegrees(degreesToRadians(curAngle) + t.theta));\n\n      this._fire('rotating', {\n        target: t.target,\n        e: e,\n        transform: t\n      });\n    }\n  });\n})();\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      extend = fabric.util.object.extend,\n      clone = fabric.util.object.clone,\n      toFixed = fabric.util.toFixed,\n      capitalize = fabric.util.string.capitalize,\n      degreesToRadians = fabric.util.degreesToRadians,\n      supportsLineDash = fabric.StaticCanvas.supports('setLineDash'),\n      objectCaching = !fabric.isLikelyNode,\n      ALIASING_LIMIT = 2;\n\n  if (fabric.Object) {\n    return;\n  }\n  /**\n   * Root object class from which all 2d shape classes inherit from\n   * @class fabric.Object\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#objects}\n   * @see {@link fabric.Object#initialize} for constructor definition\n   *\n   * @fires added\n   * @fires removed\n   *\n   * @fires selected\n   * @fires deselected\n   * @fires modified\n   * @fires modified\n   * @fires moved\n   * @fires scaled\n   * @fires rotated\n   * @fires skewed\n   *\n   * @fires rotating\n   * @fires scaling\n   * @fires moving\n   * @fires skewing\n   *\n   * @fires mousedown\n   * @fires mouseup\n   * @fires mouseover\n   * @fires mouseout\n   * @fires mousewheel\n   * @fires mousedblclick\n   *\n   * @fires dragover\n   * @fires dragenter\n   * @fires dragleave\n   * @fires drop\n   */\n\n\n  fabric.Object = fabric.util.createClass(fabric.CommonMethods,\n  /** @lends fabric.Object.prototype */\n  {\n    /**\n     * Type of an object (rect, circle, path, etc.).\n     * Note that this property is meant to be read-only and not meant to be modified.\n     * If you modify, certain parts of Fabric (such as JSON loading) won't work correctly.\n     * @type String\n     * @default\n     */\n    type: 'object',\n\n    /**\n     * Horizontal origin of transformation of an object (one of \"left\", \"right\", \"center\")\n     * See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups\n     * @type String\n     * @default\n     */\n    originX: 'left',\n\n    /**\n     * Vertical origin of transformation of an object (one of \"top\", \"bottom\", \"center\")\n     * See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups\n     * @type String\n     * @default\n     */\n    originY: 'top',\n\n    /**\n     * Top position of an object. Note that by default it's relative to object top. You can change this by setting originY={top/center/bottom}\n     * @type Number\n     * @default\n     */\n    top: 0,\n\n    /**\n     * Left position of an object. Note that by default it's relative to object left. You can change this by setting originX={left/center/right}\n     * @type Number\n     * @default\n     */\n    left: 0,\n\n    /**\n     * Object width\n     * @type Number\n     * @default\n     */\n    width: 0,\n\n    /**\n     * Object height\n     * @type Number\n     * @default\n     */\n    height: 0,\n\n    /**\n     * Object scale factor (horizontal)\n     * @type Number\n     * @default\n     */\n    scaleX: 1,\n\n    /**\n     * Object scale factor (vertical)\n     * @type Number\n     * @default\n     */\n    scaleY: 1,\n\n    /**\n     * When true, an object is rendered as flipped horizontally\n     * @type Boolean\n     * @default\n     */\n    flipX: false,\n\n    /**\n     * When true, an object is rendered as flipped vertically\n     * @type Boolean\n     * @default\n     */\n    flipY: false,\n\n    /**\n     * Opacity of an object\n     * @type Number\n     * @default\n     */\n    opacity: 1,\n\n    /**\n     * Angle of rotation of an object (in degrees)\n     * @type Number\n     * @default\n     */\n    angle: 0,\n\n    /**\n     * Angle of skew on x axes of an object (in degrees)\n     * @type Number\n     * @default\n     */\n    skewX: 0,\n\n    /**\n     * Angle of skew on y axes of an object (in degrees)\n     * @type Number\n     * @default\n     */\n    skewY: 0,\n\n    /**\n     * Size of object's controlling corners (in pixels)\n     * @type Number\n     * @default\n     */\n    cornerSize: 13,\n\n    /**\n     * When true, object's controlling corners are rendered as transparent inside (i.e. stroke instead of fill)\n     * @type Boolean\n     * @default\n     */\n    transparentCorners: true,\n\n    /**\n     * Default cursor value used when hovering over this object on canvas\n     * @type String\n     * @default\n     */\n    hoverCursor: null,\n\n    /**\n     * Default cursor value used when moving this object on canvas\n     * @type String\n     * @default\n     */\n    moveCursor: null,\n\n    /**\n     * Padding between object and its controlling borders (in pixels)\n     * @type Number\n     * @default\n     */\n    padding: 0,\n\n    /**\n     * Color of controlling borders of an object (when it's active)\n     * @type String\n     * @default\n     */\n    borderColor: 'rgba(102,153,255,0.75)',\n\n    /**\n     * Array specifying dash pattern of an object's borders (hasBorder must be true)\n     * @since 1.6.2\n     * @type Array\n     */\n    borderDashArray: null,\n\n    /**\n     * Color of controlling corners of an object (when it's active)\n     * @type String\n     * @default\n     */\n    cornerColor: 'rgba(102,153,255,0.5)',\n\n    /**\n     * Color of controlling corners of an object (when it's active and transparentCorners false)\n     * @since 1.6.2\n     * @type String\n     * @default\n     */\n    cornerStrokeColor: null,\n\n    /**\n     * Specify style of control, 'rect' or 'circle'\n     * @since 1.6.2\n     * @type String\n     */\n    cornerStyle: 'rect',\n\n    /**\n     * Array specifying dash pattern of an object's control (hasBorder must be true)\n     * @since 1.6.2\n     * @type Array\n     */\n    cornerDashArray: null,\n\n    /**\n     * When true, this object will use center point as the origin of transformation\n     * when being scaled via the controls.\n     * <b>Backwards incompatibility note:</b> This property replaces \"centerTransform\" (Boolean).\n     * @since 1.3.4\n     * @type Boolean\n     * @default\n     */\n    centeredScaling: false,\n\n    /**\n     * When true, this object will use center point as the origin of transformation\n     * when being rotated via the controls.\n     * <b>Backwards incompatibility note:</b> This property replaces \"centerTransform\" (Boolean).\n     * @since 1.3.4\n     * @type Boolean\n     * @default\n     */\n    centeredRotation: true,\n\n    /**\n     * Color of object's fill\n     * takes css colors https://www.w3.org/TR/css-color-3/\n     * @type String\n     * @default\n     */\n    fill: 'rgb(0,0,0)',\n\n    /**\n     * Fill rule used to fill an object\n     * accepted values are nonzero, evenodd\n     * <b>Backwards incompatibility note:</b> This property was used for setting globalCompositeOperation until v1.4.12 (use `fabric.Object#globalCompositeOperation` instead)\n     * @type String\n     * @default\n     */\n    fillRule: 'nonzero',\n\n    /**\n     * Composite rule used for canvas globalCompositeOperation\n     * @type String\n     * @default\n     */\n    globalCompositeOperation: 'source-over',\n\n    /**\n     * Background color of an object.\n     * takes css colors https://www.w3.org/TR/css-color-3/\n     * @type String\n     * @default\n     */\n    backgroundColor: '',\n\n    /**\n     * Selection Background color of an object. colored layer behind the object when it is active.\n     * does not mix good with globalCompositeOperation methods.\n     * @type String\n     * @default\n     */\n    selectionBackgroundColor: '',\n\n    /**\n     * When defined, an object is rendered via stroke and this property specifies its color\n     * takes css colors https://www.w3.org/TR/css-color-3/\n     * @type String\n     * @default\n     */\n    stroke: null,\n\n    /**\n     * Width of a stroke used to render this object\n     * @type Number\n     * @default\n     */\n    strokeWidth: 1,\n\n    /**\n     * Array specifying dash pattern of an object's stroke (stroke must be defined)\n     * @type Array\n     */\n    strokeDashArray: null,\n\n    /**\n     * Line offset of an object's stroke\n     * @type Number\n     * @default\n     */\n    strokeDashOffset: 0,\n\n    /**\n     * Line endings style of an object's stroke (one of \"butt\", \"round\", \"square\")\n     * @type String\n     * @default\n     */\n    strokeLineCap: 'butt',\n\n    /**\n     * Corner style of an object's stroke (one of \"bevil\", \"round\", \"miter\")\n     * @type String\n     * @default\n     */\n    strokeLineJoin: 'miter',\n\n    /**\n     * Maximum miter length (used for strokeLineJoin = \"miter\") of an object's stroke\n     * @type Number\n     * @default\n     */\n    strokeMiterLimit: 4,\n\n    /**\n     * Shadow object representing shadow of this shape\n     * @type fabric.Shadow\n     * @default\n     */\n    shadow: null,\n\n    /**\n     * Opacity of object's controlling borders when object is active and moving\n     * @type Number\n     * @default\n     */\n    borderOpacityWhenMoving: 0.4,\n\n    /**\n     * Scale factor of object's controlling borders\n     * bigger number will make a thicker border\n     * border is 1, so this is basically a border tickness\n     * since there is no way to change the border itself.\n     * @type Number\n     * @default\n     */\n    borderScaleFactor: 1,\n\n    /**\n     * Transform matrix (similar to SVG's transform matrix)\n     * This property has been depreacted. Since caching and and qrDecompose this\n     * property can be handled with the standard top,left,scaleX,scaleY,angle and skewX.\n     * A documentation example on how to parse and merge a transformMatrix will be provided before\n     * completely removing it in fabric 4.0\n     * If you are starting a project now, DO NOT use it.\n     * @deprecated since 3.2.0\n     * @type Array\n     */\n    transformMatrix: null,\n\n    /**\n     * Minimum allowed scale value of an object\n     * @type Number\n     * @default\n     */\n    minScaleLimit: 0,\n\n    /**\n     * When set to `false`, an object can not be selected for modification (using either point-click-based or group-based selection).\n     * But events still fire on it.\n     * @type Boolean\n     * @default\n     */\n    selectable: true,\n\n    /**\n     * When set to `false`, an object can not be a target of events. All events propagate through it. Introduced in v1.3.4\n     * @type Boolean\n     * @default\n     */\n    evented: true,\n\n    /**\n     * When set to `false`, an object is not rendered on canvas\n     * @type Boolean\n     * @default\n     */\n    visible: true,\n\n    /**\n     * When set to `false`, object's controls are not displayed and can not be used to manipulate object\n     * @type Boolean\n     * @default\n     */\n    hasControls: true,\n\n    /**\n     * When set to `false`, object's controlling borders are not rendered\n     * @type Boolean\n     * @default\n     */\n    hasBorders: true,\n\n    /**\n     * When set to `false`, object's controlling rotating point will not be visible or selectable\n     * @type Boolean\n     * @default\n     */\n    hasRotatingPoint: true,\n\n    /**\n     * Offset for object's controlling rotating point (when enabled via `hasRotatingPoint`)\n     * @type Number\n     * @default\n     */\n    rotatingPointOffset: 40,\n\n    /**\n     * When set to `true`, objects are \"found\" on canvas on per-pixel basis rather than according to bounding box\n     * @type Boolean\n     * @default\n     */\n    perPixelTargetFind: false,\n\n    /**\n     * When `false`, default object's values are not included in its serialization\n     * @type Boolean\n     * @default\n     */\n    includeDefaultValues: true,\n\n    /**\n     * Function that determines clipping of an object (context is passed as a first argument).\n     * If you are using code minification, ctx argument can be minified/manglied you should use\n     * as a workaround `var ctx = arguments[0];` in the function;\n     * Note that context origin is at the object's center point (not left/top corner)\n     * @deprecated since 2.0.0\n     * @type Function\n     */\n    clipTo: null,\n\n    /**\n     * When `true`, object horizontal movement is locked\n     * @type Boolean\n     * @default\n     */\n    lockMovementX: false,\n\n    /**\n     * When `true`, object vertical movement is locked\n     * @type Boolean\n     * @default\n     */\n    lockMovementY: false,\n\n    /**\n     * When `true`, object rotation is locked\n     * @type Boolean\n     * @default\n     */\n    lockRotation: false,\n\n    /**\n     * When `true`, object horizontal scaling is locked\n     * @type Boolean\n     * @default\n     */\n    lockScalingX: false,\n\n    /**\n     * When `true`, object vertical scaling is locked\n     * @type Boolean\n     * @default\n     */\n    lockScalingY: false,\n\n    /**\n     * When `true`, object non-uniform scaling is locked\n     * @type Boolean\n     * @default\n     */\n    lockUniScaling: false,\n\n    /**\n     * When `true`, object horizontal skewing is locked\n     * @type Boolean\n     * @default\n     */\n    lockSkewingX: false,\n\n    /**\n     * When `true`, object vertical skewing is locked\n     * @type Boolean\n     * @default\n     */\n    lockSkewingY: false,\n\n    /**\n     * When `true`, object cannot be flipped by scaling into negative values\n     * @type Boolean\n     * @default\n     */\n    lockScalingFlip: false,\n\n    /**\n     * When `true`, object is not exported in OBJECT/JSON\n     * @since 1.6.3\n     * @type Boolean\n     * @default\n     */\n    excludeFromExport: false,\n\n    /**\n     * When `true`, object is cached on an additional canvas.\n     * When `false`, object is not cached unless necessary ( clipPath )\n     * default to true\n     * @since 1.7.0\n     * @type Boolean\n     * @default true\n     */\n    objectCaching: objectCaching,\n\n    /**\n     * When `true`, object properties are checked for cache invalidation. In some particular\n     * situation you may want this to be disabled ( spray brush, very big, groups)\n     * or if your application does not allow you to modify properties for groups child you want\n     * to disable it for groups.\n     * default to false\n     * since 1.7.0\n     * @type Boolean\n     * @default false\n     */\n    statefullCache: false,\n\n    /**\n     * When `true`, cache does not get updated during scaling. The picture will get blocky if scaled\n     * too much and will be redrawn with correct details at the end of scaling.\n     * this setting is performance and application dependant.\n     * default to true\n     * since 1.7.0\n     * @type Boolean\n     * @default true\n     */\n    noScaleCache: true,\n\n    /**\n     * When `false`, the stoke width will scale with the object.\n     * When `true`, the stroke will always match the exact pixel size entered for stroke width.\n     * default to false\n     * @since 2.6.0\n     * @type Boolean\n     * @default false\n     * @type Boolean\n     * @default false\n     */\n    strokeUniform: false,\n\n    /**\n     * When set to `true`, object's cache will be rerendered next render call.\n     * since 1.7.0\n     * @type Boolean\n     * @default true\n     */\n    dirty: true,\n\n    /**\n     * keeps the value of the last hovered corner during mouse move.\n     * 0 is no corner, or 'mt', 'ml', 'mtr' etc..\n     * It should be private, but there is no harm in using it as\n     * a read-only property.\n     * @type number|string|any\n     * @default 0\n     */\n    __corner: 0,\n\n    /**\n     * Determines if the fill or the stroke is drawn first (one of \"fill\" or \"stroke\")\n     * @type String\n     * @default\n     */\n    paintFirst: 'fill',\n\n    /**\n     * List of properties to consider when checking if state\n     * of an object is changed (fabric.Object#hasStateChanged)\n     * as well as for history (undo/redo) purposes\n     * @type Array\n     */\n    stateProperties: ('top left width height scaleX scaleY flipX flipY originX originY transformMatrix ' + 'stroke strokeWidth strokeDashArray strokeLineCap strokeDashOffset strokeLineJoin strokeMiterLimit ' + 'angle opacity fill globalCompositeOperation shadow clipTo visible backgroundColor ' + 'skewX skewY fillRule paintFirst clipPath strokeUniform').split(' '),\n\n    /**\n     * List of properties to consider when checking if cache needs refresh\n     * Those properties are checked by statefullCache ON ( or lazy mode if we want ) or from single\n     * calls to Object.set(key, value). If the key is in this list, the object is marked as dirty\n     * and refreshed at the next render\n     * @type Array\n     */\n    cacheProperties: ('fill stroke strokeWidth strokeDashArray width height paintFirst strokeUniform' + ' strokeLineCap strokeDashOffset strokeLineJoin strokeMiterLimit backgroundColor clipPath').split(' '),\n\n    /**\n     * a fabricObject that, without stroke define a clipping area with their shape. filled in black\n     * the clipPath object gets used when the object has rendered, and the context is placed in the center\n     * of the object cacheCanvas.\n     * If you want 0,0 of a clipPath to align with an object center, use clipPath.originX/Y to 'center'\n     * @type fabric.Object\n     */\n    clipPath: undefined,\n\n    /**\n     * Meaningful ONLY when the object is used as clipPath.\n     * if true, the clipPath will make the object clip to the outside of the clipPath\n     * since 2.4.0\n     * @type boolean\n     * @default false\n     */\n    inverted: false,\n\n    /**\n     * Meaningful ONLY when the object is used as clipPath.\n     * if true, the clipPath will have its top and left relative to canvas, and will\n     * not be influenced by the object transform. This will make the clipPath relative\n     * to the canvas, but clipping just a particular object.\n     * WARNING this is beta, this feature may change or be renamed.\n     * since 2.4.0\n     * @type boolean\n     * @default false\n     */\n    absolutePositioned: false,\n\n    /**\n     * Constructor\n     * @param {Object} [options] Options object\n     */\n    initialize: function initialize(options) {\n      if (options) {\n        this.setOptions(options);\n      }\n    },\n\n    /**\n     * Create a the canvas used to keep the cached copy of the object\n     * @private\n     */\n    _createCacheCanvas: function _createCacheCanvas() {\n      this._cacheProperties = {};\n      this._cacheCanvas = fabric.util.createCanvasElement();\n      this._cacheContext = this._cacheCanvas.getContext('2d');\n\n      this._updateCacheCanvas(); // if canvas gets created, is empty, so dirty.\n\n\n      this.dirty = true;\n    },\n\n    /**\n     * Limit the cache dimensions so that X * Y do not cross fabric.perfLimitSizeTotal\n     * and each side do not cross fabric.cacheSideLimit\n     * those numbers are configurable so that you can get as much detail as you want\n     * making bargain with performances.\n     * @param {Object} dims\n     * @param {Object} dims.width width of canvas\n     * @param {Object} dims.height height of canvas\n     * @param {Object} dims.zoomX zoomX zoom value to unscale the canvas before drawing cache\n     * @param {Object} dims.zoomY zoomY zoom value to unscale the canvas before drawing cache\n     * @return {Object}.width width of canvas\n     * @return {Object}.height height of canvas\n     * @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache\n     * @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache\n     */\n    _limitCacheSize: function _limitCacheSize(dims) {\n      var perfLimitSizeTotal = fabric.perfLimitSizeTotal,\n          width = dims.width,\n          height = dims.height,\n          max = fabric.maxCacheSideLimit,\n          min = fabric.minCacheSideLimit;\n\n      if (width <= max && height <= max && width * height <= perfLimitSizeTotal) {\n        if (width < min) {\n          dims.width = min;\n        }\n\n        if (height < min) {\n          dims.height = min;\n        }\n\n        return dims;\n      }\n\n      var ar = width / height,\n          limitedDims = fabric.util.limitDimsByArea(ar, perfLimitSizeTotal),\n          capValue = fabric.util.capValue,\n          x = capValue(min, limitedDims.x, max),\n          y = capValue(min, limitedDims.y, max);\n\n      if (width > x) {\n        dims.zoomX /= width / x;\n        dims.width = x;\n        dims.capped = true;\n      }\n\n      if (height > y) {\n        dims.zoomY /= height / y;\n        dims.height = y;\n        dims.capped = true;\n      }\n\n      return dims;\n    },\n\n    /**\n     * Return the dimension and the zoom level needed to create a cache canvas\n     * big enough to host the object to be cached.\n     * @private\n     * @return {Object}.x width of object to be cached\n     * @return {Object}.y height of object to be cached\n     * @return {Object}.width width of canvas\n     * @return {Object}.height height of canvas\n     * @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache\n     * @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache\n     */\n    _getCacheCanvasDimensions: function _getCacheCanvasDimensions() {\n      var objectScale = this.getTotalObjectScaling(),\n          // caculate dimensions without skewing\n      dim = this._getTransformedDimensions(0, 0),\n          neededX = dim.x * objectScale.scaleX / this.scaleX,\n          neededY = dim.y * objectScale.scaleY / this.scaleY;\n\n      return {\n        // for sure this ALIASING_LIMIT is slightly creating problem\n        // in situation in which the cache canvas gets an upper limit\n        // also objectScale contains already scaleX and scaleY\n        width: neededX + ALIASING_LIMIT,\n        height: neededY + ALIASING_LIMIT,\n        zoomX: objectScale.scaleX,\n        zoomY: objectScale.scaleY,\n        x: neededX,\n        y: neededY\n      };\n    },\n\n    /**\n     * Update width and height of the canvas for cache\n     * returns true or false if canvas needed resize.\n     * @private\n     * @return {Boolean} true if the canvas has been resized\n     */\n    _updateCacheCanvas: function _updateCacheCanvas() {\n      var targetCanvas = this.canvas;\n\n      if (this.noScaleCache && targetCanvas && targetCanvas._currentTransform) {\n        var target = targetCanvas._currentTransform.target,\n            action = targetCanvas._currentTransform.action;\n\n        if (this === target && action.slice && action.slice(0, 5) === 'scale') {\n          return false;\n        }\n      }\n\n      var canvas = this._cacheCanvas,\n          dims = this._limitCacheSize(this._getCacheCanvasDimensions()),\n          minCacheSize = fabric.minCacheSideLimit,\n          width = dims.width,\n          height = dims.height,\n          drawingWidth,\n          drawingHeight,\n          zoomX = dims.zoomX,\n          zoomY = dims.zoomY,\n          dimensionsChanged = width !== this.cacheWidth || height !== this.cacheHeight,\n          zoomChanged = this.zoomX !== zoomX || this.zoomY !== zoomY,\n          shouldRedraw = dimensionsChanged || zoomChanged,\n          additionalWidth = 0,\n          additionalHeight = 0,\n          shouldResizeCanvas = false;\n\n      if (dimensionsChanged) {\n        var canvasWidth = this._cacheCanvas.width,\n            canvasHeight = this._cacheCanvas.height,\n            sizeGrowing = width > canvasWidth || height > canvasHeight,\n            sizeShrinking = (width < canvasWidth * 0.9 || height < canvasHeight * 0.9) && canvasWidth > minCacheSize && canvasHeight > minCacheSize;\n        shouldResizeCanvas = sizeGrowing || sizeShrinking;\n\n        if (sizeGrowing && !dims.capped && (width > minCacheSize || height > minCacheSize)) {\n          additionalWidth = width * 0.1;\n          additionalHeight = height * 0.1;\n        }\n      }\n\n      if (shouldRedraw) {\n        if (shouldResizeCanvas) {\n          canvas.width = Math.ceil(width + additionalWidth);\n          canvas.height = Math.ceil(height + additionalHeight);\n        } else {\n          this._cacheContext.setTransform(1, 0, 0, 1, 0, 0);\n\n          this._cacheContext.clearRect(0, 0, canvas.width, canvas.height);\n        }\n\n        drawingWidth = dims.x / 2;\n        drawingHeight = dims.y / 2;\n        this.cacheTranslationX = Math.round(canvas.width / 2 - drawingWidth) + drawingWidth;\n        this.cacheTranslationY = Math.round(canvas.height / 2 - drawingHeight) + drawingHeight;\n        this.cacheWidth = width;\n        this.cacheHeight = height;\n\n        this._cacheContext.translate(this.cacheTranslationX, this.cacheTranslationY);\n\n        this._cacheContext.scale(zoomX, zoomY);\n\n        this.zoomX = zoomX;\n        this.zoomY = zoomY;\n        return true;\n      }\n\n      return false;\n    },\n\n    /**\n     * Sets object's properties from options\n     * @param {Object} [options] Options object\n     */\n    setOptions: function setOptions(options) {\n      this._setOptions(options);\n\n      this._initGradient(options.fill, 'fill');\n\n      this._initGradient(options.stroke, 'stroke');\n\n      this._initClipping(options);\n\n      this._initPattern(options.fill, 'fill');\n\n      this._initPattern(options.stroke, 'stroke');\n    },\n\n    /**\n     * Transforms context when rendering an object\n     * @param {CanvasRenderingContext2D} ctx Context\n     */\n    transform: function transform(ctx) {\n      var m;\n\n      if (this.group && !this.group._transformDone) {\n        m = this.calcTransformMatrix();\n      } else {\n        m = this.calcOwnMatrix();\n      }\n\n      ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);\n    },\n\n    /**\n     * Returns an object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} Object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS,\n          object = {\n        type: this.type,\n        version: fabric.version,\n        originX: this.originX,\n        originY: this.originY,\n        left: toFixed(this.left, NUM_FRACTION_DIGITS),\n        top: toFixed(this.top, NUM_FRACTION_DIGITS),\n        width: toFixed(this.width, NUM_FRACTION_DIGITS),\n        height: toFixed(this.height, NUM_FRACTION_DIGITS),\n        fill: this.fill && this.fill.toObject ? this.fill.toObject() : this.fill,\n        stroke: this.stroke && this.stroke.toObject ? this.stroke.toObject() : this.stroke,\n        strokeWidth: toFixed(this.strokeWidth, NUM_FRACTION_DIGITS),\n        strokeDashArray: this.strokeDashArray ? this.strokeDashArray.concat() : this.strokeDashArray,\n        strokeLineCap: this.strokeLineCap,\n        strokeDashOffset: this.strokeDashOffset,\n        strokeLineJoin: this.strokeLineJoin,\n        // TODO: add this before release\n        // strokeUniform:            this.strokeUniform,\n        strokeMiterLimit: toFixed(this.strokeMiterLimit, NUM_FRACTION_DIGITS),\n        scaleX: toFixed(this.scaleX, NUM_FRACTION_DIGITS),\n        scaleY: toFixed(this.scaleY, NUM_FRACTION_DIGITS),\n        angle: toFixed(this.angle, NUM_FRACTION_DIGITS),\n        flipX: this.flipX,\n        flipY: this.flipY,\n        opacity: toFixed(this.opacity, NUM_FRACTION_DIGITS),\n        shadow: this.shadow && this.shadow.toObject ? this.shadow.toObject() : this.shadow,\n        visible: this.visible,\n        clipTo: this.clipTo && String(this.clipTo),\n        backgroundColor: this.backgroundColor,\n        fillRule: this.fillRule,\n        paintFirst: this.paintFirst,\n        globalCompositeOperation: this.globalCompositeOperation,\n        transformMatrix: this.transformMatrix ? this.transformMatrix.concat() : null,\n        skewX: toFixed(this.skewX, NUM_FRACTION_DIGITS),\n        skewY: toFixed(this.skewY, NUM_FRACTION_DIGITS)\n      };\n\n      if (this.clipPath) {\n        object.clipPath = this.clipPath.toObject(propertiesToInclude);\n        object.clipPath.inverted = this.clipPath.inverted;\n        object.clipPath.absolutePositioned = this.clipPath.absolutePositioned;\n      }\n\n      fabric.util.populateWithProperties(this, object, propertiesToInclude);\n\n      if (!this.includeDefaultValues) {\n        object = this._removeDefaultValues(object);\n      }\n\n      return object;\n    },\n\n    /**\n     * Returns (dataless) object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} Object representation of an instance\n     */\n    toDatalessObject: function toDatalessObject(propertiesToInclude) {\n      // will be overwritten by subclasses\n      return this.toObject(propertiesToInclude);\n    },\n\n    /**\n     * @private\n     * @param {Object} object\n     */\n    _removeDefaultValues: function _removeDefaultValues(object) {\n      var prototype = fabric.util.getKlass(object.type).prototype,\n          stateProperties = prototype.stateProperties;\n      stateProperties.forEach(function (prop) {\n        if (prop === 'left' || prop === 'top') {\n          return;\n        }\n\n        if (object[prop] === prototype[prop]) {\n          delete object[prop];\n        }\n\n        var isArray = Object.prototype.toString.call(object[prop]) === '[object Array]' && Object.prototype.toString.call(prototype[prop]) === '[object Array]'; // basically a check for [] === []\n\n        if (isArray && object[prop].length === 0 && prototype[prop].length === 0) {\n          delete object[prop];\n        }\n      });\n      return object;\n    },\n\n    /**\n     * Returns a string representation of an instance\n     * @return {String}\n     */\n    toString: function toString() {\n      return '#<fabric.' + capitalize(this.type) + '>';\n    },\n\n    /**\n     * Return the object scale factor counting also the group scaling\n     * @return {Object} object with scaleX and scaleY properties\n     */\n    getObjectScaling: function getObjectScaling() {\n      var options = fabric.util.qrDecompose(this.calcTransformMatrix());\n      return {\n        scaleX: Math.abs(options.scaleX),\n        scaleY: Math.abs(options.scaleY)\n      };\n    },\n\n    /**\n     * Return the object scale factor counting also the group scaling, zoom and retina\n     * @return {Object} object with scaleX and scaleY properties\n     */\n    getTotalObjectScaling: function getTotalObjectScaling() {\n      var scale = this.getObjectScaling(),\n          scaleX = scale.scaleX,\n          scaleY = scale.scaleY;\n\n      if (this.canvas) {\n        var zoom = this.canvas.getZoom();\n        var retina = this.canvas.getRetinaScaling();\n        scaleX *= zoom * retina;\n        scaleY *= zoom * retina;\n      }\n\n      return {\n        scaleX: scaleX,\n        scaleY: scaleY\n      };\n    },\n\n    /**\n     * Return the object opacity counting also the group property\n     * @return {Number}\n     */\n    getObjectOpacity: function getObjectOpacity() {\n      var opacity = this.opacity;\n\n      if (this.group) {\n        opacity *= this.group.getObjectOpacity();\n      }\n\n      return opacity;\n    },\n\n    /**\n     * @private\n     * @param {String} key\n     * @param {*} value\n     * @return {fabric.Object} thisArg\n     */\n    _set: function _set(key, value) {\n      var shouldConstrainValue = key === 'scaleX' || key === 'scaleY',\n          isChanged = this[key] !== value,\n          groupNeedsUpdate = false;\n\n      if (shouldConstrainValue) {\n        value = this._constrainScale(value);\n      }\n\n      if (key === 'scaleX' && value < 0) {\n        this.flipX = !this.flipX;\n        value *= -1;\n      } else if (key === 'scaleY' && value < 0) {\n        this.flipY = !this.flipY;\n        value *= -1;\n      } else if (key === 'shadow' && value && !(value instanceof fabric.Shadow)) {\n        value = new fabric.Shadow(value);\n      } else if (key === 'dirty' && this.group) {\n        this.group.set('dirty', value);\n      }\n\n      this[key] = value;\n\n      if (isChanged) {\n        groupNeedsUpdate = this.group && this.group.isOnACache();\n\n        if (this.cacheProperties.indexOf(key) > -1) {\n          this.dirty = true;\n          groupNeedsUpdate && this.group.set('dirty', true);\n        } else if (groupNeedsUpdate && this.stateProperties.indexOf(key) > -1) {\n          this.group.set('dirty', true);\n        }\n      }\n\n      return this;\n    },\n\n    /**\n     * This callback function is called by the parent group of an object every\n     * time a non-delegated property changes on the group. It is passed the key\n     * and value as parameters. Not adding in this function's signature to avoid\n     * Travis build error about unused variables.\n     */\n    setOnGroup: function setOnGroup() {// implemented by sub-classes, as needed.\n    },\n\n    /**\n     * Retrieves viewportTransform from Object's canvas if possible\n     * @method getViewportTransform\n     * @memberOf fabric.Object.prototype\n     * @return {Array}\n     */\n    getViewportTransform: function getViewportTransform() {\n      if (this.canvas && this.canvas.viewportTransform) {\n        return this.canvas.viewportTransform;\n      }\n\n      return fabric.iMatrix.concat();\n    },\n\n    /*\n     * @private\n     * return if the object would be visible in rendering\n     * @memberOf fabric.Object.prototype\n     * @return {Boolean}\n     */\n    isNotVisible: function isNotVisible() {\n      return this.opacity === 0 || this.width === 0 && this.height === 0 && this.strokeWidth === 0 || !this.visible;\n    },\n\n    /**\n     * Renders an object on a specified context\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    render: function render(ctx) {\n      // do not render if width/height are zeros or object is not visible\n      if (this.isNotVisible()) {\n        return;\n      }\n\n      if (this.canvas && this.canvas.skipOffscreen && !this.group && !this.isOnScreen()) {\n        return;\n      }\n\n      ctx.save();\n\n      this._setupCompositeOperation(ctx);\n\n      this.drawSelectionBackground(ctx);\n      this.transform(ctx);\n\n      this._setOpacity(ctx);\n\n      this._setShadow(ctx, this);\n\n      if (this.transformMatrix) {\n        ctx.transform.apply(ctx, this.transformMatrix);\n      }\n\n      this.clipTo && fabric.util.clipContext(this, ctx);\n\n      if (this.shouldCache()) {\n        this.renderCache();\n        this.drawCacheOnCanvas(ctx);\n      } else {\n        this._removeCacheCanvas();\n\n        this.dirty = false;\n        this.drawObject(ctx);\n\n        if (this.objectCaching && this.statefullCache) {\n          this.saveState({\n            propertySet: 'cacheProperties'\n          });\n        }\n      }\n\n      this.clipTo && ctx.restore();\n      ctx.restore();\n    },\n    renderCache: function renderCache(options) {\n      options = options || {};\n\n      if (!this._cacheCanvas) {\n        this._createCacheCanvas();\n      }\n\n      if (this.isCacheDirty()) {\n        this.statefullCache && this.saveState({\n          propertySet: 'cacheProperties'\n        });\n        this.drawObject(this._cacheContext, options.forClipping);\n        this.dirty = false;\n      }\n    },\n\n    /**\n     * Remove cacheCanvas and its dimensions from the objects\n     */\n    _removeCacheCanvas: function _removeCacheCanvas() {\n      this._cacheCanvas = null;\n      this.cacheWidth = 0;\n      this.cacheHeight = 0;\n    },\n\n    /**\n     * return true if the object will draw a stroke\n     * Does not consider text styles. This is just a shortcut used at rendering time\n     * We want it to be an aproximation and be fast.\n     * wrote to avoid extra caching, it has to return true when stroke happens,\n     * can guess when it will not happen at 100% chance, does not matter if it misses\n     * some use case where the stroke is invisible.\n     * @since 3.0.0\n     * @returns Boolean\n     */\n    hasStroke: function hasStroke() {\n      return this.stroke && this.stroke !== 'transparent' && this.strokeWidth !== 0;\n    },\n\n    /**\n     * return true if the object will draw a fill\n     * Does not consider text styles. This is just a shortcut used at rendering time\n     * We want it to be an aproximation and be fast.\n     * wrote to avoid extra caching, it has to return true when fill happens,\n     * can guess when it will not happen at 100% chance, does not matter if it misses\n     * some use case where the fill is invisible.\n     * @since 3.0.0\n     * @returns Boolean\n     */\n    hasFill: function hasFill() {\n      return this.fill && this.fill !== 'transparent';\n    },\n\n    /**\n     * When set to `true`, force the object to have its own cache, even if it is inside a group\n     * it may be needed when your object behave in a particular way on the cache and always needs\n     * its own isolated canvas to render correctly.\n     * Created to be overridden\n     * since 1.7.12\n     * @returns Boolean\n     */\n    needsItsOwnCache: function needsItsOwnCache() {\n      if (this.paintFirst === 'stroke' && this.hasFill() && this.hasStroke() && _typeof(this.shadow) === 'object') {\n        return true;\n      }\n\n      if (this.clipPath) {\n        return true;\n      }\n\n      return false;\n    },\n\n    /**\n     * Decide if the object should cache or not. Create its own cache level\n     * objectCaching is a global flag, wins over everything\n     * needsItsOwnCache should be used when the object drawing method requires\n     * a cache step. None of the fabric classes requires it.\n     * Generally you do not cache objects in groups because the group outside is cached.\n     * Read as: cache if is needed, or if the feature is enabled but we are not already caching.\n     * @return {Boolean}\n     */\n    shouldCache: function shouldCache() {\n      this.ownCaching = this.needsItsOwnCache() || this.objectCaching && (!this.group || !this.group.isOnACache());\n      return this.ownCaching;\n    },\n\n    /**\n     * Check if this object or a child object will cast a shadow\n     * used by Group.shouldCache to know if child has a shadow recursively\n     * @return {Boolean}\n     */\n    willDrawShadow: function willDrawShadow() {\n      return !!this.shadow && (this.shadow.offsetX !== 0 || this.shadow.offsetY !== 0);\n    },\n\n    /**\n     * Execute the drawing operation for an object clipPath\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    drawClipPathOnCache: function drawClipPathOnCache(ctx) {\n      var path = this.clipPath;\n      ctx.save(); // DEBUG: uncomment this line, comment the following\n      // ctx.globalAlpha = 0.4\n\n      if (path.inverted) {\n        ctx.globalCompositeOperation = 'destination-out';\n      } else {\n        ctx.globalCompositeOperation = 'destination-in';\n      } //ctx.scale(1 / 2, 1 / 2);\n\n\n      if (path.absolutePositioned) {\n        var m = fabric.util.invertTransform(this.calcTransformMatrix());\n        ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);\n      }\n\n      path.transform(ctx);\n      ctx.scale(1 / path.zoomX, 1 / path.zoomY);\n      ctx.drawImage(path._cacheCanvas, -path.cacheTranslationX, -path.cacheTranslationY);\n      ctx.restore();\n    },\n\n    /**\n     * Execute the drawing operation for an object on a specified context\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    drawObject: function drawObject(ctx, forClipping) {\n      var originalFill = this.fill,\n          originalStroke = this.stroke;\n\n      if (forClipping) {\n        this.fill = 'black';\n        this.stroke = '';\n\n        this._setClippingProperties(ctx);\n      } else {\n        this._renderBackground(ctx);\n\n        this._setStrokeStyles(ctx, this);\n\n        this._setFillStyles(ctx, this);\n      }\n\n      this._render(ctx);\n\n      this._drawClipPath(ctx);\n\n      this.fill = originalFill;\n      this.stroke = originalStroke;\n    },\n    _drawClipPath: function _drawClipPath(ctx) {\n      var path = this.clipPath;\n\n      if (!path) {\n        return;\n      } // needed to setup a couple of variables\n      // path canvas gets overridden with this one.\n      // TODO find a better solution?\n\n\n      path.canvas = this.canvas;\n      path.shouldCache();\n      path._transformDone = true;\n      path.renderCache({\n        forClipping: true\n      });\n      this.drawClipPathOnCache(ctx);\n    },\n\n    /**\n     * Paint the cached copy of the object on the target context.\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    drawCacheOnCanvas: function drawCacheOnCanvas(ctx) {\n      ctx.scale(1 / this.zoomX, 1 / this.zoomY);\n      ctx.drawImage(this._cacheCanvas, -this.cacheTranslationX, -this.cacheTranslationY);\n    },\n\n    /**\n     * Check if cache is dirty\n     * @param {Boolean} skipCanvas skip canvas checks because this object is painted\n     * on parent canvas.\n     */\n    isCacheDirty: function isCacheDirty(skipCanvas) {\n      if (this.isNotVisible()) {\n        return false;\n      }\n\n      if (this._cacheCanvas && !skipCanvas && this._updateCacheCanvas()) {\n        // in this case the context is already cleared.\n        return true;\n      } else {\n        if (this.dirty || this.clipPath && this.clipPath.absolutePositioned || this.statefullCache && this.hasStateChanged('cacheProperties')) {\n          if (this._cacheCanvas && !skipCanvas) {\n            var width = this.cacheWidth / this.zoomX;\n            var height = this.cacheHeight / this.zoomY;\n\n            this._cacheContext.clearRect(-width / 2, -height / 2, width, height);\n          }\n\n          return true;\n        }\n      }\n\n      return false;\n    },\n\n    /**\n     * Draws a background for the object big as its untransformed dimensions\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderBackground: function _renderBackground(ctx) {\n      if (!this.backgroundColor) {\n        return;\n      }\n\n      var dim = this._getNonTransformedDimensions();\n\n      ctx.fillStyle = this.backgroundColor;\n      ctx.fillRect(-dim.x / 2, -dim.y / 2, dim.x, dim.y); // if there is background color no other shadows\n      // should be casted\n\n      this._removeShadow(ctx);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _setOpacity: function _setOpacity(ctx) {\n      if (this.group && !this.group._transformDone) {\n        ctx.globalAlpha = this.getObjectOpacity();\n      } else {\n        ctx.globalAlpha *= this.opacity;\n      }\n    },\n    _setStrokeStyles: function _setStrokeStyles(ctx, decl) {\n      if (decl.stroke) {\n        ctx.lineWidth = decl.strokeWidth;\n        ctx.lineCap = decl.strokeLineCap;\n        ctx.lineDashOffset = decl.strokeDashOffset;\n        ctx.lineJoin = decl.strokeLineJoin;\n        ctx.miterLimit = decl.strokeMiterLimit;\n        ctx.strokeStyle = decl.stroke.toLive ? decl.stroke.toLive(ctx, this) : decl.stroke;\n      }\n    },\n    _setFillStyles: function _setFillStyles(ctx, decl) {\n      if (decl.fill) {\n        ctx.fillStyle = decl.fill.toLive ? decl.fill.toLive(ctx, this) : decl.fill;\n      }\n    },\n    _setClippingProperties: function _setClippingProperties(ctx) {\n      ctx.globalAlpha = 1;\n      ctx.strokeStyle = 'transparent';\n      ctx.fillStyle = '#000000';\n    },\n\n    /**\n     * @private\n     * Sets line dash\n     * @param {CanvasRenderingContext2D} ctx Context to set the dash line on\n     * @param {Array} dashArray array representing dashes\n     * @param {Function} alternative function to call if browser does not support lineDash\n     */\n    _setLineDash: function _setLineDash(ctx, dashArray, alternative) {\n      if (!dashArray || dashArray.length === 0) {\n        return;\n      } // Spec requires the concatenation of two copies the dash list when the number of elements is odd\n\n\n      if (1 & dashArray.length) {\n        dashArray.push.apply(dashArray, dashArray);\n      }\n\n      if (supportsLineDash) {\n        ctx.setLineDash(dashArray);\n      } else {\n        alternative && alternative(ctx);\n      }\n    },\n\n    /**\n     * Renders controls and borders for the object\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Object} [styleOverride] properties to override the object style\n     */\n    _renderControls: function _renderControls(ctx, styleOverride) {\n      var vpt = this.getViewportTransform(),\n          matrix = this.calcTransformMatrix(),\n          options,\n          drawBorders,\n          drawControls;\n      styleOverride = styleOverride || {};\n      drawBorders = typeof styleOverride.hasBorders !== 'undefined' ? styleOverride.hasBorders : this.hasBorders;\n      drawControls = typeof styleOverride.hasControls !== 'undefined' ? styleOverride.hasControls : this.hasControls;\n      matrix = fabric.util.multiplyTransformMatrices(vpt, matrix);\n      options = fabric.util.qrDecompose(matrix);\n      ctx.save();\n      ctx.translate(options.translateX, options.translateY);\n      ctx.lineWidth = 1 * this.borderScaleFactor;\n\n      if (!this.group) {\n        ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;\n      }\n\n      if (styleOverride.forActiveSelection) {\n        ctx.rotate(degreesToRadians(options.angle));\n        drawBorders && this.drawBordersInGroup(ctx, options, styleOverride);\n      } else {\n        ctx.rotate(degreesToRadians(this.angle));\n        drawBorders && this.drawBorders(ctx, styleOverride);\n      }\n\n      drawControls && this.drawControls(ctx, styleOverride);\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _setShadow: function _setShadow(ctx) {\n      if (!this.shadow) {\n        return;\n      }\n\n      var shadow = this.shadow,\n          canvas = this.canvas,\n          scaling,\n          multX = canvas && canvas.viewportTransform[0] || 1,\n          multY = canvas && canvas.viewportTransform[3] || 1;\n\n      if (shadow.nonScaling) {\n        scaling = {\n          scaleX: 1,\n          scaleY: 1\n        };\n      } else {\n        scaling = this.getObjectScaling();\n      }\n\n      if (canvas && canvas._isRetinaScaling()) {\n        multX *= fabric.devicePixelRatio;\n        multY *= fabric.devicePixelRatio;\n      }\n\n      ctx.shadowColor = shadow.color;\n      ctx.shadowBlur = shadow.blur * fabric.browserShadowBlurConstant * (multX + multY) * (scaling.scaleX + scaling.scaleY) / 4;\n      ctx.shadowOffsetX = shadow.offsetX * multX * scaling.scaleX;\n      ctx.shadowOffsetY = shadow.offsetY * multY * scaling.scaleY;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _removeShadow: function _removeShadow(ctx) {\n      if (!this.shadow) {\n        return;\n      }\n\n      ctx.shadowColor = '';\n      ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Object} filler fabric.Pattern or fabric.Gradient\n     * @return {Object} offset.offsetX offset for text rendering\n     * @return {Object} offset.offsetY offset for text rendering\n     */\n    _applyPatternGradientTransform: function _applyPatternGradientTransform(ctx, filler) {\n      if (!filler || !filler.toLive) {\n        return {\n          offsetX: 0,\n          offsetY: 0\n        };\n      }\n\n      var t = filler.gradientTransform || filler.patternTransform;\n      var offsetX = -this.width / 2 + filler.offsetX || 0,\n          offsetY = -this.height / 2 + filler.offsetY || 0;\n\n      if (filler.gradientUnits === 'percentage') {\n        ctx.transform(this.width, 0, 0, this.height, offsetX, offsetY);\n      } else {\n        ctx.transform(1, 0, 0, 1, offsetX, offsetY);\n      }\n\n      if (t) {\n        ctx.transform(t[0], t[1], t[2], t[3], t[4], t[5]);\n      }\n\n      return {\n        offsetX: offsetX,\n        offsetY: offsetY\n      };\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderPaintInOrder: function _renderPaintInOrder(ctx) {\n      if (this.paintFirst === 'stroke') {\n        this._renderStroke(ctx);\n\n        this._renderFill(ctx);\n      } else {\n        this._renderFill(ctx);\n\n        this._renderStroke(ctx);\n      }\n    },\n\n    /**\n     * @private\n     * function that actually render something on the context.\n     * empty here to allow Obects to work on tests to benchmark fabric functionalites\n     * not related to rendering\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render() {},\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderFill: function _renderFill(ctx) {\n      if (!this.fill) {\n        return;\n      }\n\n      ctx.save();\n\n      this._applyPatternGradientTransform(ctx, this.fill);\n\n      if (this.fillRule === 'evenodd') {\n        ctx.fill('evenodd');\n      } else {\n        ctx.fill();\n      }\n\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderStroke: function _renderStroke(ctx) {\n      if (!this.stroke || this.strokeWidth === 0) {\n        return;\n      }\n\n      if (this.shadow && !this.shadow.affectStroke) {\n        this._removeShadow(ctx);\n      }\n\n      ctx.save();\n\n      if (this.strokeUniform && this.group) {\n        var scaling = this.getObjectScaling();\n        ctx.scale(1 / scaling.scaleX, 1 / scaling.scaleY);\n      } else if (this.strokeUniform) {\n        ctx.scale(1 / this.scaleX, 1 / this.scaleY);\n      }\n\n      this._setLineDash(ctx, this.strokeDashArray, this._renderDashedStroke);\n\n      if (this.stroke.toLive && this.stroke.gradientUnits === 'percentage') {\n        // need to transform gradient in a pattern.\n        // this is a slow process. If you are hitting this codepath, and the object\n        // is not using caching, you should consider switching it on.\n        // we need a canvas as big as the current object caching canvas.\n        this._applyPatternForTransformedGradient(ctx, this.stroke);\n      } else {\n        this._applyPatternGradientTransform(ctx, this.stroke);\n      }\n\n      ctx.stroke();\n      ctx.restore();\n    },\n\n    /**\n     * This function try to patch the missing gradientTransform on canvas gradients.\n     * transforming a context to transform the gradient, is going to transform the stroke too.\n     * we want to transform the gradient but not the stroke operation, so we create\n     * a transformed gradient on a pattern and then we use the pattern instead of the gradient.\n     * this method has drwabacks: is slow, is in low resolution, needs a patch for when the size\n     * is limited.\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {fabric.Gradient} filler a fabric gradient instance\n     */\n    _applyPatternForTransformedGradient: function _applyPatternForTransformedGradient(ctx, filler) {\n      var dims = this._limitCacheSize(this._getCacheCanvasDimensions()),\n          pCanvas = fabric.util.createCanvasElement(),\n          pCtx,\n          retinaScaling = this.canvas.getRetinaScaling(),\n          width = dims.x / this.scaleX / retinaScaling,\n          height = dims.y / this.scaleY / retinaScaling;\n\n      pCanvas.width = width;\n      pCanvas.height = height;\n      pCtx = pCanvas.getContext('2d');\n      pCtx.beginPath();\n      pCtx.moveTo(0, 0);\n      pCtx.lineTo(width, 0);\n      pCtx.lineTo(width, height);\n      pCtx.lineTo(0, height);\n      pCtx.closePath();\n      pCtx.translate(width / 2, height / 2);\n      pCtx.scale(dims.zoomX / this.scaleX / retinaScaling, dims.zoomY / this.scaleY / retinaScaling);\n\n      this._applyPatternGradientTransform(pCtx, filler);\n\n      pCtx.fillStyle = filler.toLive(ctx);\n      pCtx.fill();\n      ctx.translate(-this.width / 2 - this.strokeWidth / 2, -this.height / 2 - this.strokeWidth / 2);\n      ctx.scale(retinaScaling * this.scaleX / dims.zoomX, retinaScaling * this.scaleY / dims.zoomY);\n      ctx.strokeStyle = pCtx.createPattern(pCanvas, 'no-repeat');\n    },\n\n    /**\n     * This function is an helper for svg import. it returns the center of the object in the svg\n     * untransformed coordinates\n     * @private\n     * @return {Object} center point from element coordinates\n     */\n    _findCenterFromElement: function _findCenterFromElement() {\n      return {\n        x: this.left + this.width / 2,\n        y: this.top + this.height / 2\n      };\n    },\n\n    /**\n     * This function is an helper for svg import. it decompose the transformMatrix\n     * and assign properties to object.\n     * untransformed coordinates\n     * @private\n     * @chainable\n     */\n    _assignTransformMatrixProps: function _assignTransformMatrixProps() {\n      if (this.transformMatrix) {\n        var options = fabric.util.qrDecompose(this.transformMatrix);\n        this.flipX = false;\n        this.flipY = false;\n        this.set('scaleX', options.scaleX);\n        this.set('scaleY', options.scaleY);\n        this.angle = options.angle;\n        this.skewX = options.skewX;\n        this.skewY = 0;\n      }\n    },\n\n    /**\n     * This function is an helper for svg import. it removes the transform matrix\n     * and set to object properties that fabricjs can handle\n     * @private\n     * @param {Object} preserveAspectRatioOptions\n     * @return {thisArg}\n     */\n    _removeTransformMatrix: function _removeTransformMatrix(preserveAspectRatioOptions) {\n      var center = this._findCenterFromElement();\n\n      if (this.transformMatrix) {\n        this._assignTransformMatrixProps();\n\n        center = fabric.util.transformPoint(center, this.transformMatrix);\n      }\n\n      this.transformMatrix = null;\n\n      if (preserveAspectRatioOptions) {\n        this.scaleX *= preserveAspectRatioOptions.scaleX;\n        this.scaleY *= preserveAspectRatioOptions.scaleY;\n        this.cropX = preserveAspectRatioOptions.cropX;\n        this.cropY = preserveAspectRatioOptions.cropY;\n        center.x += preserveAspectRatioOptions.offsetLeft;\n        center.y += preserveAspectRatioOptions.offsetTop;\n        this.width = preserveAspectRatioOptions.width;\n        this.height = preserveAspectRatioOptions.height;\n      }\n\n      this.setPositionByOrigin(center, 'center', 'center');\n    },\n\n    /**\n     * Clones an instance, using a callback method will work for every object.\n     * @param {Function} callback Callback is invoked with a clone as a first argument\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     */\n    clone: function clone(callback, propertiesToInclude) {\n      var objectForm = this.toObject(propertiesToInclude);\n\n      if (this.constructor.fromObject) {\n        this.constructor.fromObject(objectForm, callback);\n      } else {\n        fabric.Object._fromObject('Object', objectForm, callback);\n      }\n    },\n\n    /**\n     * Creates an instance of fabric.Image out of an object\n     * could make use of both toDataUrl or toCanvasElement.\n     * @param {Function} callback callback, invoked with an instance as a first argument\n     * @param {Object} [options] for clone as image, passed to toDataURL\n     * @param {String} [options.format=png] The format of the output image. Either \"jpeg\" or \"png\"\n     * @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.\n     * @param {Number} [options.multiplier=1] Multiplier to scale by\n     * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14\n     * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14\n     * @param {Number} [options.width] Cropping width. Introduced in v1.2.14\n     * @param {Number} [options.height] Cropping height. Introduced in v1.2.14\n     * @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4\n     * @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4\n     * @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2\n     * @return {fabric.Object} thisArg\n     */\n    cloneAsImage: function cloneAsImage(callback, options) {\n      var canvasEl = this.toCanvasElement(options);\n\n      if (callback) {\n        callback(new fabric.Image(canvasEl));\n      }\n\n      return this;\n    },\n\n    /**\n     * Converts an object into a HTMLCanvas element\n     * @param {Object} options Options object\n     * @param {Number} [options.multiplier=1] Multiplier to scale by\n     * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14\n     * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14\n     * @param {Number} [options.width] Cropping width. Introduced in v1.2.14\n     * @param {Number} [options.height] Cropping height. Introduced in v1.2.14\n     * @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4\n     * @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4\n     * @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2\n     * @return {HTMLCanvasElement} Returns DOM element <canvas> with the fabric.Object\n     */\n    toCanvasElement: function toCanvasElement(options) {\n      options || (options = {});\n      var utils = fabric.util,\n          origParams = utils.saveObjectTransform(this),\n          originalGroup = this.group,\n          originalShadow = this.shadow,\n          abs = Math.abs,\n          multiplier = (options.multiplier || 1) * (options.enableRetinaScaling ? fabric.devicePixelRatio : 1);\n      delete this.group;\n\n      if (options.withoutTransform) {\n        utils.resetObjectTransform(this);\n      }\n\n      if (options.withoutShadow) {\n        this.shadow = null;\n      }\n\n      var el = fabric.util.createCanvasElement(),\n          // skip canvas zoom and calculate with setCoords now.\n      boundingRect = this.getBoundingRect(true, true),\n          shadow = this.shadow,\n          scaling,\n          shadowOffset = {\n        x: 0,\n        y: 0\n      },\n          shadowBlur,\n          width,\n          height;\n\n      if (shadow) {\n        shadowBlur = shadow.blur;\n\n        if (shadow.nonScaling) {\n          scaling = {\n            scaleX: 1,\n            scaleY: 1\n          };\n        } else {\n          scaling = this.getObjectScaling();\n        } // consider non scaling shadow.\n\n\n        shadowOffset.x = 2 * Math.round(abs(shadow.offsetX) + shadowBlur) * abs(scaling.scaleX);\n        shadowOffset.y = 2 * Math.round(abs(shadow.offsetY) + shadowBlur) * abs(scaling.scaleY);\n      }\n\n      width = boundingRect.width + shadowOffset.x;\n      height = boundingRect.height + shadowOffset.y; // if the current width/height is not an integer\n      // we need to make it so.\n\n      el.width = Math.ceil(width);\n      el.height = Math.ceil(height);\n      var canvas = new fabric.StaticCanvas(el, {\n        enableRetinaScaling: false,\n        renderOnAddRemove: false,\n        skipOffscreen: false\n      });\n\n      if (options.format === 'jpeg') {\n        canvas.backgroundColor = '#fff';\n      }\n\n      this.setPositionByOrigin(new fabric.Point(canvas.width / 2, canvas.height / 2), 'center', 'center');\n      var originalCanvas = this.canvas;\n      canvas.add(this);\n      var canvasEl = canvas.toCanvasElement(multiplier || 1, options);\n      this.shadow = originalShadow;\n      this.set('canvas', originalCanvas);\n\n      if (originalGroup) {\n        this.group = originalGroup;\n      }\n\n      this.set(origParams).setCoords(); // canvas.dispose will call image.dispose that will nullify the elements\n      // since this canvas is a simple element for the process, we remove references\n      // to objects in this way in order to avoid object trashing.\n\n      canvas._objects = [];\n      canvas.dispose();\n      canvas = null;\n      return canvasEl;\n    },\n\n    /**\n     * Converts an object into a data-url-like string\n     * @param {Object} options Options object\n     * @param {String} [options.format=png] The format of the output image. Either \"jpeg\" or \"png\"\n     * @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.\n     * @param {Number} [options.multiplier=1] Multiplier to scale by\n     * @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14\n     * @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14\n     * @param {Number} [options.width] Cropping width. Introduced in v1.2.14\n     * @param {Number} [options.height] Cropping height. Introduced in v1.2.14\n     * @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4\n     * @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4\n     * @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2\n     * @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format\n     */\n    toDataURL: function toDataURL(options) {\n      options || (options = {});\n      return fabric.util.toDataURL(this.toCanvasElement(options), options.format || 'png', options.quality || 1);\n    },\n\n    /**\n     * Returns true if specified type is identical to the type of an instance\n     * @param {String} type Type to check against\n     * @return {Boolean}\n     */\n    isType: function isType(type) {\n      return this.type === type;\n    },\n\n    /**\n     * Returns complexity of an instance\n     * @return {Number} complexity of this instance (is 1 unless subclassed)\n     */\n    complexity: function complexity() {\n      return 1;\n    },\n\n    /**\n     * Returns a JSON representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} JSON\n     */\n    toJSON: function toJSON(propertiesToInclude) {\n      // delegate, not alias\n      return this.toObject(propertiesToInclude);\n    },\n\n    /**\n     * Sets gradient (fill or stroke) of an object\n     * percentages for x1,x2,y1,y2,r1,r2 together with gradientUnits 'pixels', are not supported.\n     * <b>Backwards incompatibility note:</b> This method was named \"setGradientFill\" until v1.1.0\n     * @param {String} property Property name 'stroke' or 'fill'\n     * @param {Object} [options] Options object\n     * @param {String} [options.type] Type of gradient 'radial' or 'linear'\n     * @param {Number} [options.x1=0] x-coordinate of start point\n     * @param {Number} [options.y1=0] y-coordinate of start point\n     * @param {Number} [options.x2=0] x-coordinate of end point\n     * @param {Number} [options.y2=0] y-coordinate of end point\n     * @param {Number} [options.r1=0] Radius of start point (only for radial gradients)\n     * @param {Number} [options.r2=0] Radius of end point (only for radial gradients)\n     * @param {Object} [options.colorStops] Color stops object eg. {0: 'ff0000', 1: '000000'}\n     * @param {Object} [options.gradientTransform] transformMatrix for gradient\n     * @return {fabric.Object} thisArg\n     * @chainable\n     * @deprecated since 3.4.0\n     * @see {@link http://jsfiddle.net/fabricjs/58y8b/|jsFiddle demo}\n     * @example <caption>Set linear gradient</caption>\n     * object.setGradient('fill', {\n     *   type: 'linear',\n     *   x1: -object.width / 2,\n     *   y1: 0,\n     *   x2: object.width / 2,\n     *   y2: 0,\n     *   colorStops: {\n     *     0: 'red',\n     *     0.5: '#005555',\n     *     1: 'rgba(0,0,255,0.5)'\n     *   }\n     * });\n     * canvas.renderAll();\n     * @example <caption>Set radial gradient</caption>\n     * object.setGradient('fill', {\n     *   type: 'radial',\n     *   x1: 0,\n     *   y1: 0,\n     *   x2: 0,\n     *   y2: 0,\n     *   r1: object.width / 2,\n     *   r2: 10,\n     *   colorStops: {\n     *     0: 'red',\n     *     0.5: '#005555',\n     *     1: 'rgba(0,0,255,0.5)'\n     *   }\n     * });\n     * canvas.renderAll();\n     */\n    setGradient: function setGradient(property, options) {\n      options || (options = {});\n      var gradient = {\n        colorStops: []\n      };\n      gradient.type = options.type || (options.r1 || options.r2 ? 'radial' : 'linear');\n      gradient.coords = {\n        x1: options.x1,\n        y1: options.y1,\n        x2: options.x2,\n        y2: options.y2\n      };\n      gradient.gradientUnits = options.gradientUnits || 'pixels';\n\n      if (options.r1 || options.r2) {\n        gradient.coords.r1 = options.r1;\n        gradient.coords.r2 = options.r2;\n      }\n\n      gradient.gradientTransform = options.gradientTransform;\n      fabric.Gradient.prototype.addColorStop.call(gradient, options.colorStops);\n      return this.set(property, fabric.Gradient.forObject(this, gradient));\n    },\n\n    /**\n     * Sets pattern fill of an object\n     * @param {Object} options Options object\n     * @param {(String|HTMLImageElement)} options.source Pattern source\n     * @param {String} [options.repeat=repeat] Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat)\n     * @param {Number} [options.offsetX=0] Pattern horizontal offset from object's left/top corner\n     * @param {Number} [options.offsetY=0] Pattern vertical offset from object's left/top corner\n     * @param {Function} [callback] Callback to invoke when image set as a pattern\n     * @return {fabric.Object} thisArg\n     * @chainable\n     * @deprecated since 3.5.0\n     * @see {@link http://jsfiddle.net/fabricjs/QT3pa/|jsFiddle demo}\n     * @example <caption>Set pattern</caption>\n     * object.setPatternFill({\n     *   source: 'http://fabricjs.com/assets/escheresque_ste.png',\n     *   repeat: 'repeat'\n     * },canvas.renderAll.bind(canvas));\n     */\n    setPatternFill: function setPatternFill(options, callback) {\n      return this.set('fill', new fabric.Pattern(options, callback));\n    },\n\n    /**\n     * Sets {@link fabric.Object#shadow|shadow} of an object\n     * @param {Object|String} [options] Options object or string (e.g. \"2px 2px 10px rgba(0,0,0,0.2)\")\n     * @param {String} [options.color=rgb(0,0,0)] Shadow color\n     * @param {Number} [options.blur=0] Shadow blur\n     * @param {Number} [options.offsetX=0] Shadow horizontal offset\n     * @param {Number} [options.offsetY=0] Shadow vertical offset\n     * @return {fabric.Object} thisArg\n     * @chainable\n     * @deprecated since 3.5.0\n     * @see {@link http://jsfiddle.net/fabricjs/7gvJG/|jsFiddle demo}\n     * @example <caption>Set shadow with string notation</caption>\n     * object.setShadow('2px 2px 10px rgba(0,0,0,0.2)');\n     * canvas.renderAll();\n     * @example <caption>Set shadow with object notation</caption>\n     * object.setShadow({\n     *   color: 'red',\n     *   blur: 10,\n     *   offsetX: 20,\n     *   offsetY: 20\n     * });\n     * canvas.renderAll();\n     */\n    setShadow: function setShadow(options) {\n      return this.set('shadow', options ? new fabric.Shadow(options) : null);\n    },\n\n    /**\n     * Sets \"color\" of an instance (alias of `set('fill', &hellip;)`)\n     * @param {String} color Color value\n     * @return {fabric.Object} thisArg\n     * @deprecated since 3.5.0\n     * @chainable\n     */\n    setColor: function setColor(color) {\n      this.set('fill', color);\n      return this;\n    },\n\n    /**\n     * Sets \"angle\" of an instance with centered rotation\n     * @param {Number} angle Angle value (in degrees)\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    rotate: function rotate(angle) {\n      var shouldCenterOrigin = (this.originX !== 'center' || this.originY !== 'center') && this.centeredRotation;\n\n      if (shouldCenterOrigin) {\n        this._setOriginToCenter();\n      }\n\n      this.set('angle', angle);\n\n      if (shouldCenterOrigin) {\n        this._resetOrigin();\n      }\n\n      return this;\n    },\n\n    /**\n     * Centers object horizontally on canvas to which it was added last.\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    centerH: function centerH() {\n      this.canvas && this.canvas.centerObjectH(this);\n      return this;\n    },\n\n    /**\n     * Centers object horizontally on current viewport of canvas to which it was added last.\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    viewportCenterH: function viewportCenterH() {\n      this.canvas && this.canvas.viewportCenterObjectH(this);\n      return this;\n    },\n\n    /**\n     * Centers object vertically on canvas to which it was added last.\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    centerV: function centerV() {\n      this.canvas && this.canvas.centerObjectV(this);\n      return this;\n    },\n\n    /**\n     * Centers object vertically on current viewport of canvas to which it was added last.\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    viewportCenterV: function viewportCenterV() {\n      this.canvas && this.canvas.viewportCenterObjectV(this);\n      return this;\n    },\n\n    /**\n     * Centers object vertically and horizontally on canvas to which is was added last\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    center: function center() {\n      this.canvas && this.canvas.centerObject(this);\n      return this;\n    },\n\n    /**\n     * Centers object on current viewport of canvas to which it was added last.\n     * You might need to call `setCoords` on an object after centering, to update controls area.\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    viewportCenter: function viewportCenter() {\n      this.canvas && this.canvas.viewportCenterObject(this);\n      return this;\n    },\n\n    /**\n     * Returns coordinates of a pointer relative to an object\n     * @param {Event} e Event to operate upon\n     * @param {Object} [pointer] Pointer to operate upon (instead of event)\n     * @return {Object} Coordinates of a pointer (x, y)\n     */\n    getLocalPointer: function getLocalPointer(e, pointer) {\n      pointer = pointer || this.canvas.getPointer(e);\n\n      var pClicked = new fabric.Point(pointer.x, pointer.y),\n          objectLeftTop = this._getLeftTopCoords();\n\n      if (this.angle) {\n        pClicked = fabric.util.rotatePoint(pClicked, objectLeftTop, degreesToRadians(-this.angle));\n      }\n\n      return {\n        x: pClicked.x - objectLeftTop.x,\n        y: pClicked.y - objectLeftTop.y\n      };\n    },\n\n    /**\n     * Sets canvas globalCompositeOperation for specific object\n     * custom composition operation for the particular object can be specified using globalCompositeOperation property\n     * @param {CanvasRenderingContext2D} ctx Rendering canvas context\n     */\n    _setupCompositeOperation: function _setupCompositeOperation(ctx) {\n      if (this.globalCompositeOperation) {\n        ctx.globalCompositeOperation = this.globalCompositeOperation;\n      }\n    }\n  });\n  fabric.util.createAccessors && fabric.util.createAccessors(fabric.Object);\n  extend(fabric.Object.prototype, fabric.Observable);\n  /**\n   * Defines the number of fraction digits to use when serializing object values.\n   * You can use it to increase/decrease precision of such values like left, top, scaleX, scaleY, etc.\n   * @static\n   * @memberOf fabric.Object\n   * @constant\n   * @type Number\n   */\n\n  fabric.Object.NUM_FRACTION_DIGITS = 2;\n\n  fabric.Object._fromObject = function (className, object, callback, extraParam) {\n    var klass = fabric[className];\n    object = clone(object, true);\n    fabric.util.enlivenPatterns([object.fill, object.stroke], function (patterns) {\n      if (typeof patterns[0] !== 'undefined') {\n        object.fill = patterns[0];\n      }\n\n      if (typeof patterns[1] !== 'undefined') {\n        object.stroke = patterns[1];\n      }\n\n      fabric.util.enlivenObjects([object.clipPath], function (enlivedProps) {\n        object.clipPath = enlivedProps[0];\n        var instance = extraParam ? new klass(object[extraParam], object) : new klass(object);\n        callback && callback(instance);\n      });\n    });\n  };\n  /**\n   * Unique id used internally when creating SVG elements\n   * @static\n   * @memberOf fabric.Object\n   * @type Number\n   */\n\n\n  fabric.Object.__uid = 0;\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function () {\n  var degreesToRadians = fabric.util.degreesToRadians,\n      originXOffset = {\n    left: -0.5,\n    center: 0,\n    right: 0.5\n  },\n      originYOffset = {\n    top: -0.5,\n    center: 0,\n    bottom: 0.5\n  };\n  fabric.util.object.extend(fabric.Object.prototype,\n  /** @lends fabric.Object.prototype */\n  {\n    /**\n     * Translates the coordinates from a set of origin to another (based on the object's dimensions)\n     * @param {fabric.Point} point The point which corresponds to the originX and originY params\n     * @param {String} fromOriginX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} fromOriginY Vertical origin: 'top', 'center' or 'bottom'\n     * @param {String} toOriginX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} toOriginY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {fabric.Point}\n     */\n    translateToGivenOrigin: function translateToGivenOrigin(point, fromOriginX, fromOriginY, toOriginX, toOriginY) {\n      var x = point.x,\n          y = point.y,\n          offsetX,\n          offsetY,\n          dim;\n\n      if (typeof fromOriginX === 'string') {\n        fromOriginX = originXOffset[fromOriginX];\n      } else {\n        fromOriginX -= 0.5;\n      }\n\n      if (typeof toOriginX === 'string') {\n        toOriginX = originXOffset[toOriginX];\n      } else {\n        toOriginX -= 0.5;\n      }\n\n      offsetX = toOriginX - fromOriginX;\n\n      if (typeof fromOriginY === 'string') {\n        fromOriginY = originYOffset[fromOriginY];\n      } else {\n        fromOriginY -= 0.5;\n      }\n\n      if (typeof toOriginY === 'string') {\n        toOriginY = originYOffset[toOriginY];\n      } else {\n        toOriginY -= 0.5;\n      }\n\n      offsetY = toOriginY - fromOriginY;\n\n      if (offsetX || offsetY) {\n        dim = this._getTransformedDimensions();\n        x = point.x + offsetX * dim.x;\n        y = point.y + offsetY * dim.y;\n      }\n\n      return new fabric.Point(x, y);\n    },\n\n    /**\n     * Translates the coordinates from origin to center coordinates (based on the object's dimensions)\n     * @param {fabric.Point} point The point which corresponds to the originX and originY params\n     * @param {String} originX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} originY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {fabric.Point}\n     */\n    translateToCenterPoint: function translateToCenterPoint(point, originX, originY) {\n      var p = this.translateToGivenOrigin(point, originX, originY, 'center', 'center');\n\n      if (this.angle) {\n        return fabric.util.rotatePoint(p, point, degreesToRadians(this.angle));\n      }\n\n      return p;\n    },\n\n    /**\n     * Translates the coordinates from center to origin coordinates (based on the object's dimensions)\n     * @param {fabric.Point} center The point which corresponds to center of the object\n     * @param {String} originX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} originY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {fabric.Point}\n     */\n    translateToOriginPoint: function translateToOriginPoint(center, originX, originY) {\n      var p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY);\n\n      if (this.angle) {\n        return fabric.util.rotatePoint(p, center, degreesToRadians(this.angle));\n      }\n\n      return p;\n    },\n\n    /**\n     * Returns the real center coordinates of the object\n     * @return {fabric.Point}\n     */\n    getCenterPoint: function getCenterPoint() {\n      var leftTop = new fabric.Point(this.left, this.top);\n      return this.translateToCenterPoint(leftTop, this.originX, this.originY);\n    },\n\n    /**\n     * Returns the coordinates of the object based on center coordinates\n     * @param {fabric.Point} point The point which corresponds to the originX and originY params\n     * @return {fabric.Point}\n     */\n    // getOriginPoint: function(center) {\n    //   return this.translateToOriginPoint(center, this.originX, this.originY);\n    // },\n\n    /**\n     * Returns the coordinates of the object as if it has a different origin\n     * @param {String} originX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} originY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {fabric.Point}\n     */\n    getPointByOrigin: function getPointByOrigin(originX, originY) {\n      var center = this.getCenterPoint();\n      return this.translateToOriginPoint(center, originX, originY);\n    },\n\n    /**\n     * Returns the point in local coordinates\n     * @param {fabric.Point} point The point relative to the global coordinate system\n     * @param {String} originX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} originY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {fabric.Point}\n     */\n    toLocalPoint: function toLocalPoint(point, originX, originY) {\n      var center = this.getCenterPoint(),\n          p,\n          p2;\n\n      if (typeof originX !== 'undefined' && typeof originY !== 'undefined') {\n        p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY);\n      } else {\n        p = new fabric.Point(this.left, this.top);\n      }\n\n      p2 = new fabric.Point(point.x, point.y);\n\n      if (this.angle) {\n        p2 = fabric.util.rotatePoint(p2, center, -degreesToRadians(this.angle));\n      }\n\n      return p2.subtractEquals(p);\n    },\n\n    /**\n     * Returns the point in global coordinates\n     * @param {fabric.Point} The point relative to the local coordinate system\n     * @return {fabric.Point}\n     */\n    // toGlobalPoint: function(point) {\n    //   return fabric.util.rotatePoint(point, this.getCenterPoint(), degreesToRadians(this.angle)).addEquals(new fabric.Point(this.left, this.top));\n    // },\n\n    /**\n     * Sets the position of the object taking into consideration the object's origin\n     * @param {fabric.Point} pos The new position of the object\n     * @param {String} originX Horizontal origin: 'left', 'center' or 'right'\n     * @param {String} originY Vertical origin: 'top', 'center' or 'bottom'\n     * @return {void}\n     */\n    setPositionByOrigin: function setPositionByOrigin(pos, originX, originY) {\n      var center = this.translateToCenterPoint(pos, originX, originY),\n          position = this.translateToOriginPoint(center, this.originX, this.originY);\n      this.set('left', position.x);\n      this.set('top', position.y);\n    },\n\n    /**\n     * @param {String} to One of 'left', 'center', 'right'\n     */\n    adjustPosition: function adjustPosition(to) {\n      var angle = degreesToRadians(this.angle),\n          hypotFull = this.getScaledWidth(),\n          xFull = fabric.util.cos(angle) * hypotFull,\n          yFull = fabric.util.sin(angle) * hypotFull,\n          offsetFrom,\n          offsetTo; //TODO: this function does not consider mixed situation like top, center.\n\n      if (typeof this.originX === 'string') {\n        offsetFrom = originXOffset[this.originX];\n      } else {\n        offsetFrom = this.originX - 0.5;\n      }\n\n      if (typeof to === 'string') {\n        offsetTo = originXOffset[to];\n      } else {\n        offsetTo = to - 0.5;\n      }\n\n      this.left += xFull * (offsetTo - offsetFrom);\n      this.top += yFull * (offsetTo - offsetFrom);\n      this.setCoords();\n      this.originX = to;\n    },\n\n    /**\n     * Sets the origin/position of the object to it's center point\n     * @private\n     * @return {void}\n     */\n    _setOriginToCenter: function _setOriginToCenter() {\n      this._originalOriginX = this.originX;\n      this._originalOriginY = this.originY;\n      var center = this.getCenterPoint();\n      this.originX = 'center';\n      this.originY = 'center';\n      this.left = center.x;\n      this.top = center.y;\n    },\n\n    /**\n     * Resets the origin/position of the object to it's original origin\n     * @private\n     * @return {void}\n     */\n    _resetOrigin: function _resetOrigin() {\n      var originPoint = this.translateToOriginPoint(this.getCenterPoint(), this._originalOriginX, this._originalOriginY);\n      this.originX = this._originalOriginX;\n      this.originY = this._originalOriginY;\n      this.left = originPoint.x;\n      this.top = originPoint.y;\n      this._originalOriginX = null;\n      this._originalOriginY = null;\n    },\n\n    /**\n     * @private\n     */\n    _getLeftTopCoords: function _getLeftTopCoords() {\n      return this.translateToOriginPoint(this.getCenterPoint(), 'left', 'top');\n    }\n  });\n})();\n\n(function () {\n  function _getCoords(coords) {\n    return [new fabric.Point(coords.tl.x, coords.tl.y), new fabric.Point(coords.tr.x, coords.tr.y), new fabric.Point(coords.br.x, coords.br.y), new fabric.Point(coords.bl.x, coords.bl.y)];\n  }\n\n  var degreesToRadians = fabric.util.degreesToRadians,\n      multiplyMatrices = fabric.util.multiplyTransformMatrices,\n      transformPoint = fabric.util.transformPoint;\n  fabric.util.object.extend(fabric.Object.prototype,\n  /** @lends fabric.Object.prototype */\n  {\n    /**\n     * Describe object's corner position in canvas element coordinates.\n     * properties are tl,mt,tr,ml,mr,bl,mb,br,mtr for the main controls.\n     * each property is an object with x, y and corner.\n     * The `corner` property contains in a similar manner the 4 points of the\n     * interactive area of the corner.\n     * The coordinates depends from this properties: width, height, scaleX, scaleY\n     * skewX, skewY, angle, strokeWidth, viewportTransform, top, left, padding.\n     * The coordinates get updated with @method setCoords.\n     * You can calculate them without updating with @method calcCoords;\n     * @memberOf fabric.Object.prototype\n     */\n    oCoords: null,\n\n    /**\n     * Describe object's corner position in canvas object absolute coordinates\n     * properties are tl,tr,bl,br and describe the four main corner.\n     * each property is an object with x, y, instance of Fabric.Point.\n     * The coordinates depends from this properties: width, height, scaleX, scaleY\n     * skewX, skewY, angle, strokeWidth, top, left.\n     * Those coordinates are useful to understand where an object is. They get updated\n     * with oCoords but they do not need to be updated when zoom or panning change.\n     * The coordinates get updated with @method setCoords.\n     * You can calculate them without updating with @method calcCoords(true);\n     * @memberOf fabric.Object.prototype\n     */\n    aCoords: null,\n\n    /**\n     * storage for object transform matrix\n     */\n    ownMatrixCache: null,\n\n    /**\n     * storage for object full transform matrix\n     */\n    matrixCache: null,\n\n    /**\n     * return correct set of coordinates for intersection\n     */\n    getCoords: function getCoords(absolute, calculate) {\n      if (!this.oCoords) {\n        this.setCoords();\n      }\n\n      var coords = absolute ? this.aCoords : this.oCoords;\n      return _getCoords(calculate ? this.calcCoords(absolute) : coords);\n    },\n\n    /**\n     * Checks if object intersects with an area formed by 2 points\n     * @param {Object} pointTL top-left point of area\n     * @param {Object} pointBR bottom-right point of area\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if object intersects with an area formed by 2 points\n     */\n    intersectsWithRect: function intersectsWithRect(pointTL, pointBR, absolute, calculate) {\n      var coords = this.getCoords(absolute, calculate),\n          intersection = fabric.Intersection.intersectPolygonRectangle(coords, pointTL, pointBR);\n      return intersection.status === 'Intersection';\n    },\n\n    /**\n     * Checks if object intersects with another object\n     * @param {Object} other Object to test\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if object intersects with another object\n     */\n    intersectsWithObject: function intersectsWithObject(other, absolute, calculate) {\n      var intersection = fabric.Intersection.intersectPolygonPolygon(this.getCoords(absolute, calculate), other.getCoords(absolute, calculate));\n      return intersection.status === 'Intersection' || other.isContainedWithinObject(this, absolute, calculate) || this.isContainedWithinObject(other, absolute, calculate);\n    },\n\n    /**\n     * Checks if object is fully contained within area of another object\n     * @param {Object} other Object to test\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if object is fully contained within area of another object\n     */\n    isContainedWithinObject: function isContainedWithinObject(other, absolute, calculate) {\n      var points = this.getCoords(absolute, calculate),\n          i = 0,\n          lines = other._getImageLines(calculate ? other.calcCoords(absolute) : absolute ? other.aCoords : other.oCoords);\n\n      for (; i < 4; i++) {\n        if (!other.containsPoint(points[i], lines)) {\n          return false;\n        }\n      }\n\n      return true;\n    },\n\n    /**\n     * Checks if object is fully contained within area formed by 2 points\n     * @param {Object} pointTL top-left point of area\n     * @param {Object} pointBR bottom-right point of area\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if object is fully contained within area formed by 2 points\n     */\n    isContainedWithinRect: function isContainedWithinRect(pointTL, pointBR, absolute, calculate) {\n      var boundingRect = this.getBoundingRect(absolute, calculate);\n      return boundingRect.left >= pointTL.x && boundingRect.left + boundingRect.width <= pointBR.x && boundingRect.top >= pointTL.y && boundingRect.top + boundingRect.height <= pointBR.y;\n    },\n\n    /**\n     * Checks if point is inside the object\n     * @param {fabric.Point} point Point to check against\n     * @param {Object} [lines] object returned from @method _getImageLines\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if point is inside the object\n     */\n    containsPoint: function containsPoint(point, lines, absolute, calculate) {\n      var lines = lines || this._getImageLines(calculate ? this.calcCoords(absolute) : absolute ? this.aCoords : this.oCoords),\n          xPoints = this._findCrossPoints(point, lines); // if xPoints is odd then point is inside the object\n\n\n      return xPoints !== 0 && xPoints % 2 === 1;\n    },\n\n    /**\n     * Checks if object is contained within the canvas with current viewportTransform\n     * the check is done stopping at first point that appears on screen\n     * @param {Boolean} [calculate] use coordinates of current position instead of .aCoords\n     * @return {Boolean} true if object is fully or partially contained within canvas\n     */\n    isOnScreen: function isOnScreen(calculate) {\n      if (!this.canvas) {\n        return false;\n      }\n\n      var pointTL = this.canvas.vptCoords.tl,\n          pointBR = this.canvas.vptCoords.br;\n      var points = this.getCoords(true, calculate),\n          point;\n\n      for (var i = 0; i < 4; i++) {\n        point = points[i];\n\n        if (point.x <= pointBR.x && point.x >= pointTL.x && point.y <= pointBR.y && point.y >= pointTL.y) {\n          return true;\n        }\n      } // no points on screen, check intersection with absolute coordinates\n\n\n      if (this.intersectsWithRect(pointTL, pointBR, true, calculate)) {\n        return true;\n      }\n\n      return this._containsCenterOfCanvas(pointTL, pointBR, calculate);\n    },\n\n    /**\n     * Checks if the object contains the midpoint between canvas extremities\n     * Does not make sense outside the context of isOnScreen and isPartiallyOnScreen\n     * @private\n     * @param {Fabric.Point} pointTL Top Left point\n     * @param {Fabric.Point} pointBR Top Right point\n     * @param {Boolean} calculate use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if the object contains the point\n     */\n    _containsCenterOfCanvas: function _containsCenterOfCanvas(pointTL, pointBR, calculate) {\n      // worst case scenario the object is so big that contains the screen\n      var centerPoint = {\n        x: (pointTL.x + pointBR.x) / 2,\n        y: (pointTL.y + pointBR.y) / 2\n      };\n\n      if (this.containsPoint(centerPoint, null, true, calculate)) {\n        return true;\n      }\n\n      return false;\n    },\n\n    /**\n     * Checks if object is partially contained within the canvas with current viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords\n     * @return {Boolean} true if object is partially contained within canvas\n     */\n    isPartiallyOnScreen: function isPartiallyOnScreen(calculate) {\n      if (!this.canvas) {\n        return false;\n      }\n\n      var pointTL = this.canvas.vptCoords.tl,\n          pointBR = this.canvas.vptCoords.br;\n\n      if (this.intersectsWithRect(pointTL, pointBR, true, calculate)) {\n        return true;\n      }\n\n      return this._containsCenterOfCanvas(pointTL, pointBR, calculate);\n    },\n\n    /**\n     * Method that returns an object with the object edges in it, given the coordinates of the corners\n     * @private\n     * @param {Object} oCoords Coordinates of the object corners\n     */\n    _getImageLines: function _getImageLines(oCoords) {\n      return {\n        topline: {\n          o: oCoords.tl,\n          d: oCoords.tr\n        },\n        rightline: {\n          o: oCoords.tr,\n          d: oCoords.br\n        },\n        bottomline: {\n          o: oCoords.br,\n          d: oCoords.bl\n        },\n        leftline: {\n          o: oCoords.bl,\n          d: oCoords.tl\n        }\n      };\n    },\n\n    /**\n     * Helper method to determine how many cross points are between the 4 object edges\n     * and the horizontal line determined by a point on canvas\n     * @private\n     * @param {fabric.Point} point Point to check\n     * @param {Object} lines Coordinates of the object being evaluated\n     */\n    // remove yi, not used but left code here just in case.\n    _findCrossPoints: function _findCrossPoints(point, lines) {\n      var b1,\n          b2,\n          a1,\n          a2,\n          xi,\n          // yi,\n      xcount = 0,\n          iLine;\n\n      for (var lineKey in lines) {\n        iLine = lines[lineKey]; // optimisation 1: line below point. no cross\n\n        if (iLine.o.y < point.y && iLine.d.y < point.y) {\n          continue;\n        } // optimisation 2: line above point. no cross\n\n\n        if (iLine.o.y >= point.y && iLine.d.y >= point.y) {\n          continue;\n        } // optimisation 3: vertical line case\n\n\n        if (iLine.o.x === iLine.d.x && iLine.o.x >= point.x) {\n          xi = iLine.o.x; // yi = point.y;\n        } // calculate the intersection point\n        else {\n          b1 = 0;\n          b2 = (iLine.d.y - iLine.o.y) / (iLine.d.x - iLine.o.x);\n          a1 = point.y - b1 * point.x;\n          a2 = iLine.o.y - b2 * iLine.o.x;\n          xi = -(a1 - a2) / (b1 - b2); // yi = a1 + b1 * xi;\n        } // dont count xi < point.x cases\n\n\n        if (xi >= point.x) {\n          xcount += 1;\n        } // optimisation 4: specific for square images\n\n\n        if (xcount === 2) {\n          break;\n        }\n      }\n\n      return xcount;\n    },\n\n    /**\n     * Returns coordinates of object's bounding rectangle (left, top, width, height)\n     * the box is intended as aligned to axis of canvas.\n     * @param {Boolean} [absolute] use coordinates without viewportTransform\n     * @param {Boolean} [calculate] use coordinates of current position instead of .oCoords / .aCoords\n     * @return {Object} Object with left, top, width, height properties\n     */\n    getBoundingRect: function getBoundingRect(absolute, calculate) {\n      var coords = this.getCoords(absolute, calculate);\n      return fabric.util.makeBoundingBoxFromPoints(coords);\n    },\n\n    /**\n     * Returns width of an object's bounding box counting transformations\n     * before 2.0 it was named getWidth();\n     * @return {Number} width value\n     */\n    getScaledWidth: function getScaledWidth() {\n      return this._getTransformedDimensions().x;\n    },\n\n    /**\n     * Returns height of an object bounding box counting transformations\n     * before 2.0 it was named getHeight();\n     * @return {Number} height value\n     */\n    getScaledHeight: function getScaledHeight() {\n      return this._getTransformedDimensions().y;\n    },\n\n    /**\n     * Makes sure the scale is valid and modifies it if necessary\n     * @private\n     * @param {Number} value\n     * @return {Number}\n     */\n    _constrainScale: function _constrainScale(value) {\n      if (Math.abs(value) < this.minScaleLimit) {\n        if (value < 0) {\n          return -this.minScaleLimit;\n        } else {\n          return this.minScaleLimit;\n        }\n      } else if (value === 0) {\n        return 0.0001;\n      }\n\n      return value;\n    },\n\n    /**\n     * Scales an object (equally by x and y)\n     * @param {Number} value Scale factor\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    scale: function scale(value) {\n      this._set('scaleX', value);\n\n      this._set('scaleY', value);\n\n      return this.setCoords();\n    },\n\n    /**\n     * Scales an object to a given width, with respect to bounding box (scaling by x/y equally)\n     * @param {Number} value New width value\n     * @param {Boolean} absolute ignore viewport\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    scaleToWidth: function scaleToWidth(value, absolute) {\n      // adjust to bounding rect factor so that rotated shapes would fit as well\n      var boundingRectFactor = this.getBoundingRect(absolute).width / this.getScaledWidth();\n      return this.scale(value / this.width / boundingRectFactor);\n    },\n\n    /**\n     * Scales an object to a given height, with respect to bounding box (scaling by x/y equally)\n     * @param {Number} value New height value\n     * @param {Boolean} absolute ignore viewport\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    scaleToHeight: function scaleToHeight(value, absolute) {\n      // adjust to bounding rect factor so that rotated shapes would fit as well\n      var boundingRectFactor = this.getBoundingRect(absolute).height / this.getScaledHeight();\n      return this.scale(value / this.height / boundingRectFactor);\n    },\n\n    /**\n     * Calculates and returns the .coords of an object.\n     * @return {Object} Object with tl, tr, br, bl ....\n     * @chainable\n     */\n    calcCoords: function calcCoords(absolute) {\n      var rotateMatrix = this._calcRotateMatrix(),\n          translateMatrix = this._calcTranslateMatrix(),\n          startMatrix = multiplyMatrices(translateMatrix, rotateMatrix),\n          vpt = this.getViewportTransform(),\n          finalMatrix = absolute ? startMatrix : multiplyMatrices(vpt, startMatrix),\n          dim = this._getTransformedDimensions(),\n          w = dim.x / 2,\n          h = dim.y / 2,\n          tl = transformPoint({\n        x: -w,\n        y: -h\n      }, finalMatrix),\n          tr = transformPoint({\n        x: w,\n        y: -h\n      }, finalMatrix),\n          bl = transformPoint({\n        x: -w,\n        y: h\n      }, finalMatrix),\n          br = transformPoint({\n        x: w,\n        y: h\n      }, finalMatrix);\n\n      if (!absolute) {\n        var padding = this.padding,\n            angle = degreesToRadians(this.angle),\n            cos = fabric.util.cos(angle),\n            sin = fabric.util.sin(angle),\n            cosP = cos * padding,\n            sinP = sin * padding,\n            cosPSinP = cosP + sinP,\n            cosPMinusSinP = cosP - sinP;\n\n        if (padding) {\n          tl.x -= cosPMinusSinP;\n          tl.y -= cosPSinP;\n          tr.x += cosPSinP;\n          tr.y -= cosPMinusSinP;\n          bl.x -= cosPSinP;\n          bl.y += cosPMinusSinP;\n          br.x += cosPMinusSinP;\n          br.y += cosPSinP;\n        }\n\n        var ml = new fabric.Point((tl.x + bl.x) / 2, (tl.y + bl.y) / 2),\n            mt = new fabric.Point((tr.x + tl.x) / 2, (tr.y + tl.y) / 2),\n            mr = new fabric.Point((br.x + tr.x) / 2, (br.y + tr.y) / 2),\n            mb = new fabric.Point((br.x + bl.x) / 2, (br.y + bl.y) / 2),\n            mtr = new fabric.Point(mt.x + sin * this.rotatingPointOffset, mt.y - cos * this.rotatingPointOffset);\n      } // if (!absolute) {\n      //   var canvas = this.canvas;\n      //   setTimeout(function() {\n      //     canvas.contextTop.clearRect(0, 0, 700, 700);\n      //     canvas.contextTop.fillStyle = 'green';\n      //     canvas.contextTop.fillRect(mb.x, mb.y, 3, 3);\n      //     canvas.contextTop.fillRect(bl.x, bl.y, 3, 3);\n      //     canvas.contextTop.fillRect(br.x, br.y, 3, 3);\n      //     canvas.contextTop.fillRect(tl.x, tl.y, 3, 3);\n      //     canvas.contextTop.fillRect(tr.x, tr.y, 3, 3);\n      //     canvas.contextTop.fillRect(ml.x, ml.y, 3, 3);\n      //     canvas.contextTop.fillRect(mr.x, mr.y, 3, 3);\n      //     canvas.contextTop.fillRect(mt.x, mt.y, 3, 3);\n      //     canvas.contextTop.fillRect(mtr.x, mtr.y, 3, 3);\n      //   }, 50);\n      // }\n\n\n      var coords = {\n        // corners\n        tl: tl,\n        tr: tr,\n        br: br,\n        bl: bl\n      };\n\n      if (!absolute) {\n        // middle\n        coords.ml = ml;\n        coords.mt = mt;\n        coords.mr = mr;\n        coords.mb = mb; // rotating point\n\n        coords.mtr = mtr;\n      }\n\n      return coords;\n    },\n\n    /**\n     * Sets corner position coordinates based on current angle, width and height.\n     * See {@link https://github.com/kangax/fabric.js/wiki/When-to-call-setCoords|When-to-call-setCoords}\n     * @param {Boolean} [ignoreZoom] set oCoords with or without the viewport transform.\n     * @param {Boolean} [skipAbsolute] skip calculation of aCoords, useful in setViewportTransform\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    setCoords: function setCoords(ignoreZoom, skipAbsolute) {\n      this.oCoords = this.calcCoords(ignoreZoom);\n\n      if (!skipAbsolute) {\n        this.aCoords = this.calcCoords(true);\n      } // set coordinates of the draggable boxes in the corners used to scale/rotate the image\n\n\n      ignoreZoom || this._setCornerCoords && this._setCornerCoords();\n      return this;\n    },\n\n    /**\n     * calculate rotation matrix of an object\n     * @return {Array} rotation matrix for the object\n     */\n    _calcRotateMatrix: function _calcRotateMatrix() {\n      return fabric.util.calcRotateMatrix(this);\n    },\n\n    /**\n     * calculate the translation matrix for an object transform\n     * @return {Array} rotation matrix for the object\n     */\n    _calcTranslateMatrix: function _calcTranslateMatrix() {\n      var center = this.getCenterPoint();\n      return [1, 0, 0, 1, center.x, center.y];\n    },\n    transformMatrixKey: function transformMatrixKey(skipGroup) {\n      var sep = '_',\n          prefix = '';\n\n      if (!skipGroup && this.group) {\n        prefix = this.group.transformMatrixKey(skipGroup) + sep;\n      }\n\n      ;\n      return prefix + this.top + sep + this.left + sep + this.scaleX + sep + this.scaleY + sep + this.skewX + sep + this.skewY + sep + this.angle + sep + this.originX + sep + this.originY + sep + this.width + sep + this.height + sep + this.strokeWidth + this.flipX + this.flipY;\n    },\n\n    /**\n     * calculate transform matrix that represents the current transformations from the\n     * object's properties.\n     * @param {Boolean} [skipGroup] return transform matrix for object not counting parent transformations\n     * @return {Array} transform matrix for the object\n     */\n    calcTransformMatrix: function calcTransformMatrix(skipGroup) {\n      if (skipGroup) {\n        return this.calcOwnMatrix();\n      }\n\n      var key = this.transformMatrixKey(),\n          cache = this.matrixCache || (this.matrixCache = {});\n\n      if (cache.key === key) {\n        return cache.value;\n      }\n\n      var matrix = this.calcOwnMatrix();\n\n      if (this.group) {\n        matrix = multiplyMatrices(this.group.calcTransformMatrix(), matrix);\n      }\n\n      cache.key = key;\n      cache.value = matrix;\n      return matrix;\n    },\n\n    /**\n     * calculate transform matrix that represents the current transformations from the\n     * object's properties, this matrix does not include the group transformation\n     * @return {Array} transform matrix for the object\n     */\n    calcOwnMatrix: function calcOwnMatrix() {\n      var key = this.transformMatrixKey(true),\n          cache = this.ownMatrixCache || (this.ownMatrixCache = {});\n\n      if (cache.key === key) {\n        return cache.value;\n      }\n\n      var tMatrix = this._calcTranslateMatrix();\n\n      this.translateX = tMatrix[4];\n      this.translateY = tMatrix[5];\n      cache.key = key;\n      cache.value = fabric.util.composeMatrix(this);\n      return cache.value;\n    },\n\n    /*\n     * Calculate object dimensions from its properties\n     * @private\n     * @deprecated since 3.4.0, please use fabric.util._calcDimensionsTransformMatrix\n     * not including or including flipX, flipY to emulate the flipping boolean\n     * @return {Object} .x width dimension\n     * @return {Object} .y height dimension\n     */\n    _calcDimensionsTransformMatrix: function _calcDimensionsTransformMatrix(skewX, skewY, flipping) {\n      return fabric.util.calcDimensionsMatrix({\n        skewX: skewX,\n        skewY: skewY,\n        scaleX: this.scaleX * (flipping && this.flipX ? -1 : 1),\n        scaleY: this.scaleY * (flipping && this.flipY ? -1 : 1)\n      });\n    },\n\n    /*\n     * Calculate object dimensions from its properties\n     * @private\n     * @return {Object} .x width dimension\n     * @return {Object} .y height dimension\n     */\n    _getNonTransformedDimensions: function _getNonTransformedDimensions() {\n      var strokeWidth = this.strokeWidth,\n          w = this.width + strokeWidth,\n          h = this.height + strokeWidth;\n      return {\n        x: w,\n        y: h\n      };\n    },\n\n    /*\n     * Calculate object bounding box dimensions from its properties scale, skew.\n     * The skewX and skewY parameters are used in the skewing logic path and\n     * do not provide something useful to common use cases.\n     * @param {Number} [skewX], a value to override current skewX\n     * @param {Number} [skewY], a value to override current skewY\n     * @private\n     * @return {Object} .x width dimension\n     * @return {Object} .y height dimension\n     */\n    _getTransformedDimensions: function _getTransformedDimensions(skewX, skewY) {\n      if (typeof skewX === 'undefined') {\n        skewX = this.skewX;\n      }\n\n      if (typeof skewY === 'undefined') {\n        skewY = this.skewY;\n      }\n\n      var dimensions = this._getNonTransformedDimensions(),\n          dimX,\n          dimY,\n          noSkew = skewX === 0 && skewY === 0;\n\n      if (this.strokeUniform) {\n        dimX = this.width;\n        dimY = this.height;\n      } else {\n        dimX = dimensions.x;\n        dimY = dimensions.y;\n      }\n\n      if (noSkew) {\n        return this._finalizeDimensions(dimX * this.scaleX, dimY * this.scaleY);\n      } else {\n        dimX /= 2;\n        dimY /= 2;\n      }\n\n      var points = [{\n        x: -dimX,\n        y: -dimY\n      }, {\n        x: dimX,\n        y: -dimY\n      }, {\n        x: -dimX,\n        y: dimY\n      }, {\n        x: dimX,\n        y: dimY\n      }],\n          transformMatrix = fabric.util.calcDimensionsMatrix({\n        scaleX: this.scaleX,\n        scaleY: this.scaleY,\n        skewX: skewX,\n        skewY: skewY\n      }),\n          bbox = fabric.util.makeBoundingBoxFromPoints(points, transformMatrix);\n      return this._finalizeDimensions(bbox.width, bbox.height);\n    },\n\n    /*\n     * Calculate object bounding box dimensions from its properties scale, skew.\n     * @param Number width width of the bbox\n     * @param Number height height of the bbox\n     * @private\n     * @return {Object} .x finalized width dimension\n     * @return {Object} .y finalized height dimension\n     */\n    _finalizeDimensions: function _finalizeDimensions(width, height) {\n      return this.strokeUniform ? {\n        x: width + this.strokeWidth,\n        y: height + this.strokeWidth\n      } : {\n        x: width,\n        y: height\n      };\n    },\n\n    /*\n     * Calculate object dimensions for controls, including padding and canvas zoom.\n     * private\n     */\n    _calculateCurrentDimensions: function _calculateCurrentDimensions() {\n      var vpt = this.getViewportTransform(),\n          dim = this._getTransformedDimensions(),\n          p = fabric.util.transformPoint(dim, vpt, true);\n\n      return p.scalarAdd(2 * this.padding);\n    }\n  });\n})();\n\nfabric.util.object.extend(fabric.Object.prototype,\n/** @lends fabric.Object.prototype */\n{\n  /**\n   * Moves an object to the bottom of the stack of drawn objects\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  sendToBack: function sendToBack() {\n    if (this.group) {\n      fabric.StaticCanvas.prototype.sendToBack.call(this.group, this);\n    } else if (this.canvas) {\n      this.canvas.sendToBack(this);\n    }\n\n    return this;\n  },\n\n  /**\n   * Moves an object to the top of the stack of drawn objects\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  bringToFront: function bringToFront() {\n    if (this.group) {\n      fabric.StaticCanvas.prototype.bringToFront.call(this.group, this);\n    } else if (this.canvas) {\n      this.canvas.bringToFront(this);\n    }\n\n    return this;\n  },\n\n  /**\n   * Moves an object down in stack of drawn objects\n   * @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  sendBackwards: function sendBackwards(intersecting) {\n    if (this.group) {\n      fabric.StaticCanvas.prototype.sendBackwards.call(this.group, this, intersecting);\n    } else if (this.canvas) {\n      this.canvas.sendBackwards(this, intersecting);\n    }\n\n    return this;\n  },\n\n  /**\n   * Moves an object up in stack of drawn objects\n   * @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  bringForward: function bringForward(intersecting) {\n    if (this.group) {\n      fabric.StaticCanvas.prototype.bringForward.call(this.group, this, intersecting);\n    } else if (this.canvas) {\n      this.canvas.bringForward(this, intersecting);\n    }\n\n    return this;\n  },\n\n  /**\n   * Moves an object to specified level in stack of drawn objects\n   * @param {Number} index New position of object\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  moveTo: function moveTo(index) {\n    if (this.group && this.group.type !== 'activeSelection') {\n      fabric.StaticCanvas.prototype.moveTo.call(this.group, this, index);\n    } else if (this.canvas) {\n      this.canvas.moveTo(this, index);\n    }\n\n    return this;\n  }\n});\n\n(function () {\n  var extend = fabric.util.object.extend,\n      originalSet = 'stateProperties';\n  /*\n    Depends on `stateProperties`\n  */\n\n  function saveProps(origin, destination, props) {\n    var tmpObj = {},\n        deep = true;\n    props.forEach(function (prop) {\n      tmpObj[prop] = origin[prop];\n    });\n    extend(origin[destination], tmpObj, deep);\n  }\n\n  function _isEqual(origValue, currentValue, firstPass) {\n    if (origValue === currentValue) {\n      // if the objects are identical, return\n      return true;\n    } else if (Array.isArray(origValue)) {\n      if (!Array.isArray(currentValue) || origValue.length !== currentValue.length) {\n        return false;\n      }\n\n      for (var i = 0, len = origValue.length; i < len; i++) {\n        if (!_isEqual(origValue[i], currentValue[i])) {\n          return false;\n        }\n      }\n\n      return true;\n    } else if (origValue && _typeof(origValue) === 'object') {\n      var keys = Object.keys(origValue),\n          key;\n\n      if (!currentValue || _typeof(currentValue) !== 'object' || !firstPass && keys.length !== Object.keys(currentValue).length) {\n        return false;\n      }\n\n      for (var i = 0, len = keys.length; i < len; i++) {\n        key = keys[i]; // since clipPath is in the statefull cache list and the clipPath objects\n        // would be iterated as an object, this would lead to possible infinite recursion\n\n        if (key === 'canvas') {\n          continue;\n        }\n\n        if (!_isEqual(origValue[key], currentValue[key])) {\n          return false;\n        }\n      }\n\n      return true;\n    }\n  }\n\n  fabric.util.object.extend(fabric.Object.prototype,\n  /** @lends fabric.Object.prototype */\n  {\n    /**\n     * Returns true if object state (one of its state properties) was changed\n     * @param {String} [propertySet] optional name for the set of property we want to save\n     * @return {Boolean} true if instance' state has changed since `{@link fabric.Object#saveState}` was called\n     */\n    hasStateChanged: function hasStateChanged(propertySet) {\n      propertySet = propertySet || originalSet;\n      var dashedPropertySet = '_' + propertySet;\n\n      if (Object.keys(this[dashedPropertySet]).length < this[propertySet].length) {\n        return true;\n      }\n\n      return !_isEqual(this[dashedPropertySet], this, true);\n    },\n\n    /**\n     * Saves state of an object\n     * @param {Object} [options] Object with additional `stateProperties` array to include when saving state\n     * @return {fabric.Object} thisArg\n     */\n    saveState: function saveState(options) {\n      var propertySet = options && options.propertySet || originalSet,\n          destination = '_' + propertySet;\n\n      if (!this[destination]) {\n        return this.setupState(options);\n      }\n\n      saveProps(this, destination, this[propertySet]);\n\n      if (options && options.stateProperties) {\n        saveProps(this, destination, options.stateProperties);\n      }\n\n      return this;\n    },\n\n    /**\n     * Setups state of an object\n     * @param {Object} [options] Object with additional `stateProperties` array to include when saving state\n     * @return {fabric.Object} thisArg\n     */\n    setupState: function setupState(options) {\n      options = options || {};\n      var propertySet = options.propertySet || originalSet;\n      options.propertySet = propertySet;\n      this['_' + propertySet] = {};\n      this.saveState(options);\n      return this;\n    }\n  });\n})();\n\n(function () {\n  var degreesToRadians = fabric.util.degreesToRadians;\n  fabric.util.object.extend(fabric.Object.prototype,\n  /** @lends fabric.Object.prototype */\n  {\n    /**\n     * The object interactivity controls.\n     * @private\n     */\n    _controlsVisibility: null,\n\n    /**\n     * Determines which corner has been clicked\n     * @private\n     * @param {Object} pointer The pointer indicating the mouse position\n     * @return {String|Boolean} corner code (tl, tr, bl, br, etc.), or false if nothing is found\n     */\n    _findTargetCorner: function _findTargetCorner(pointer) {\n      // objects in group, anykind, are not self modificable,\n      // must not return an hovered corner.\n      if (!this.hasControls || this.group || !this.canvas || this.canvas._activeObject !== this) {\n        return false;\n      }\n\n      var ex = pointer.x,\n          ey = pointer.y,\n          xPoints,\n          lines;\n      this.__corner = 0;\n\n      for (var i in this.oCoords) {\n        if (!this.isControlVisible(i)) {\n          continue;\n        }\n\n        if (i === 'mtr' && !this.hasRotatingPoint) {\n          continue;\n        }\n\n        if (this.get('lockUniScaling') && (i === 'mt' || i === 'mr' || i === 'mb' || i === 'ml')) {\n          continue;\n        }\n\n        lines = this._getImageLines(this.oCoords[i].corner); // debugging\n        // canvas.contextTop.fillRect(lines.bottomline.d.x, lines.bottomline.d.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.bottomline.o.x, lines.bottomline.o.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.leftline.d.x, lines.leftline.d.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.leftline.o.x, lines.leftline.o.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.topline.d.x, lines.topline.d.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.topline.o.x, lines.topline.o.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.rightline.d.x, lines.rightline.d.y, 2, 2);\n        // canvas.contextTop.fillRect(lines.rightline.o.x, lines.rightline.o.y, 2, 2);\n\n        xPoints = this._findCrossPoints({\n          x: ex,\n          y: ey\n        }, lines);\n\n        if (xPoints !== 0 && xPoints % 2 === 1) {\n          this.__corner = i;\n          return i;\n        }\n      }\n\n      return false;\n    },\n\n    /**\n     * Sets the coordinates of the draggable boxes in the corners of\n     * the image used to scale/rotate it.\n     * @private\n     */\n    _setCornerCoords: function _setCornerCoords() {\n      var coords = this.oCoords,\n          newTheta = degreesToRadians(45 - this.angle),\n\n      /* Math.sqrt(2 * Math.pow(this.cornerSize, 2)) / 2, */\n\n      /* 0.707106 stands for sqrt(2)/2 */\n      cornerHypotenuse = this.cornerSize * 0.707106,\n          cosHalfOffset = cornerHypotenuse * fabric.util.cos(newTheta),\n          sinHalfOffset = cornerHypotenuse * fabric.util.sin(newTheta),\n          x,\n          y;\n\n      for (var point in coords) {\n        x = coords[point].x;\n        y = coords[point].y;\n        coords[point].corner = {\n          tl: {\n            x: x - sinHalfOffset,\n            y: y - cosHalfOffset\n          },\n          tr: {\n            x: x + cosHalfOffset,\n            y: y - sinHalfOffset\n          },\n          bl: {\n            x: x - cosHalfOffset,\n            y: y + sinHalfOffset\n          },\n          br: {\n            x: x + sinHalfOffset,\n            y: y + cosHalfOffset\n          }\n        };\n      }\n    },\n\n    /**\n     * Draws a colored layer behind the object, inside its selection borders.\n     * Requires public options: padding, selectionBackgroundColor\n     * this function is called when the context is transformed\n     * has checks to be skipped when the object is on a staticCanvas\n     * @param {CanvasRenderingContext2D} ctx Context to draw on\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    drawSelectionBackground: function drawSelectionBackground(ctx) {\n      if (!this.selectionBackgroundColor || this.canvas && !this.canvas.interactive || this.canvas && this.canvas._activeObject !== this) {\n        return this;\n      }\n\n      ctx.save();\n\n      var center = this.getCenterPoint(),\n          wh = this._calculateCurrentDimensions(),\n          vpt = this.canvas.viewportTransform;\n\n      ctx.translate(center.x, center.y);\n      ctx.scale(1 / vpt[0], 1 / vpt[3]);\n      ctx.rotate(degreesToRadians(this.angle));\n      ctx.fillStyle = this.selectionBackgroundColor;\n      ctx.fillRect(-wh.x / 2, -wh.y / 2, wh.x, wh.y);\n      ctx.restore();\n      return this;\n    },\n\n    /**\n     * Draws borders of an object's bounding box.\n     * Requires public properties: width, height\n     * Requires public options: padding, borderColor\n     * @param {CanvasRenderingContext2D} ctx Context to draw on\n     * @param {Object} styleOverride object to override the object style\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    drawBorders: function drawBorders(ctx, styleOverride) {\n      styleOverride = styleOverride || {};\n\n      var wh = this._calculateCurrentDimensions(),\n          strokeWidth = this.borderScaleFactor,\n          width = wh.x + strokeWidth,\n          height = wh.y + strokeWidth,\n          drawRotatingPoint = typeof styleOverride.hasRotatingPoint !== 'undefined' ? styleOverride.hasRotatingPoint : this.hasRotatingPoint,\n          hasControls = typeof styleOverride.hasControls !== 'undefined' ? styleOverride.hasControls : this.hasControls,\n          rotatingPointOffset = typeof styleOverride.rotatingPointOffset !== 'undefined' ? styleOverride.rotatingPointOffset : this.rotatingPointOffset;\n\n      ctx.save();\n      ctx.strokeStyle = styleOverride.borderColor || this.borderColor;\n\n      this._setLineDash(ctx, styleOverride.borderDashArray || this.borderDashArray, null);\n\n      ctx.strokeRect(-width / 2, -height / 2, width, height);\n\n      if (drawRotatingPoint && this.isControlVisible('mtr') && hasControls) {\n        var rotateHeight = -height / 2;\n        ctx.beginPath();\n        ctx.moveTo(0, rotateHeight);\n        ctx.lineTo(0, rotateHeight - rotatingPointOffset);\n        ctx.stroke();\n      }\n\n      ctx.restore();\n      return this;\n    },\n\n    /**\n     * Draws borders of an object's bounding box when it is inside a group.\n     * Requires public properties: width, height\n     * Requires public options: padding, borderColor\n     * @param {CanvasRenderingContext2D} ctx Context to draw on\n     * @param {object} options object representing current object parameters\n     * @param {Object} styleOverride object to override the object style\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    drawBordersInGroup: function drawBordersInGroup(ctx, options, styleOverride) {\n      styleOverride = styleOverride || {};\n      var p = {\n        x: this.width,\n        y: this.height\n      },\n          matrix = fabric.util.composeMatrix({\n        scaleX: options.scaleX,\n        scaleY: options.scaleY,\n        skewX: options.skewX\n      }),\n          wh = fabric.util.transformPoint(p, matrix),\n          strokeWidth = this.strokeWidth,\n          borderScaleFactor = this.borderScaleFactor,\n          width = wh.x + strokeWidth * (this.strokeUniform ? this.canvas.getZoom() : options.scaleX) + borderScaleFactor,\n          height = wh.y + strokeWidth * (this.strokeUniform ? this.canvas.getZoom() : options.scaleY) + borderScaleFactor;\n      ctx.save();\n\n      this._setLineDash(ctx, styleOverride.borderDashArray || this.borderDashArray, null);\n\n      ctx.strokeStyle = styleOverride.borderColor || this.borderColor;\n      ctx.strokeRect(-width / 2, -height / 2, width, height);\n      ctx.restore();\n      return this;\n    },\n\n    /**\n     * Draws corners of an object's bounding box.\n     * Requires public properties: width, height\n     * Requires public options: cornerSize, padding\n     * @param {CanvasRenderingContext2D} ctx Context to draw on\n     * @param {Object} styleOverride object to override the object style\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    drawControls: function drawControls(ctx, styleOverride) {\n      styleOverride = styleOverride || {};\n\n      var wh = this._calculateCurrentDimensions(),\n          width = wh.x,\n          height = wh.y,\n          scaleOffset = styleOverride.cornerSize || this.cornerSize,\n          left = -(width + scaleOffset) / 2,\n          top = -(height + scaleOffset) / 2,\n          transparentCorners = typeof styleOverride.transparentCorners !== 'undefined' ? styleOverride.transparentCorners : this.transparentCorners,\n          hasRotatingPoint = typeof styleOverride.hasRotatingPoint !== 'undefined' ? styleOverride.hasRotatingPoint : this.hasRotatingPoint,\n          methodName = transparentCorners ? 'stroke' : 'fill';\n\n      ctx.save();\n      ctx.strokeStyle = ctx.fillStyle = styleOverride.cornerColor || this.cornerColor;\n\n      if (!this.transparentCorners) {\n        ctx.strokeStyle = styleOverride.cornerStrokeColor || this.cornerStrokeColor;\n      }\n\n      this._setLineDash(ctx, styleOverride.cornerDashArray || this.cornerDashArray, null); // top-left\n\n\n      this._drawControl('tl', ctx, methodName, left, top, styleOverride); // top-right\n\n\n      this._drawControl('tr', ctx, methodName, left + width, top, styleOverride); // bottom-left\n\n\n      this._drawControl('bl', ctx, methodName, left, top + height, styleOverride); // bottom-right\n\n\n      this._drawControl('br', ctx, methodName, left + width, top + height, styleOverride);\n\n      if (!this.get('lockUniScaling')) {\n        // middle-top\n        this._drawControl('mt', ctx, methodName, left + width / 2, top, styleOverride); // middle-bottom\n\n\n        this._drawControl('mb', ctx, methodName, left + width / 2, top + height, styleOverride); // middle-right\n\n\n        this._drawControl('mr', ctx, methodName, left + width, top + height / 2, styleOverride); // middle-left\n\n\n        this._drawControl('ml', ctx, methodName, left, top + height / 2, styleOverride);\n      } // middle-top-rotate\n\n\n      if (hasRotatingPoint) {\n        this._drawControl('mtr', ctx, methodName, left + width / 2, top - this.rotatingPointOffset, styleOverride);\n      }\n\n      ctx.restore();\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _drawControl: function _drawControl(control, ctx, methodName, left, top, styleOverride) {\n      styleOverride = styleOverride || {};\n\n      if (!this.isControlVisible(control)) {\n        return;\n      }\n\n      var size = this.cornerSize,\n          stroke = !this.transparentCorners && this.cornerStrokeColor;\n\n      switch (styleOverride.cornerStyle || this.cornerStyle) {\n        case 'circle':\n          ctx.beginPath();\n          ctx.arc(left + size / 2, top + size / 2, size / 2, 0, 2 * Math.PI, false);\n          ctx[methodName]();\n\n          if (stroke) {\n            ctx.stroke();\n          }\n\n          break;\n\n        default:\n          this.transparentCorners || ctx.clearRect(left, top, size, size);\n          ctx[methodName + 'Rect'](left, top, size, size);\n\n          if (stroke) {\n            ctx.strokeRect(left, top, size, size);\n          }\n\n      }\n    },\n\n    /**\n     * Returns true if the specified control is visible, false otherwise.\n     * @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.\n     * @returns {Boolean} true if the specified control is visible, false otherwise\n     */\n    isControlVisible: function isControlVisible(controlName) {\n      return this._getControlsVisibility()[controlName];\n    },\n\n    /**\n     * Sets the visibility of the specified control.\n     * @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.\n     * @param {Boolean} visible true to set the specified control visible, false otherwise\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    setControlVisible: function setControlVisible(controlName, visible) {\n      this._getControlsVisibility()[controlName] = visible;\n      return this;\n    },\n\n    /**\n     * Sets the visibility state of object controls.\n     * @param {Object} [options] Options object\n     * @param {Boolean} [options.bl] true to enable the bottom-left control, false to disable it\n     * @param {Boolean} [options.br] true to enable the bottom-right control, false to disable it\n     * @param {Boolean} [options.mb] true to enable the middle-bottom control, false to disable it\n     * @param {Boolean} [options.ml] true to enable the middle-left control, false to disable it\n     * @param {Boolean} [options.mr] true to enable the middle-right control, false to disable it\n     * @param {Boolean} [options.mt] true to enable the middle-top control, false to disable it\n     * @param {Boolean} [options.tl] true to enable the top-left control, false to disable it\n     * @param {Boolean} [options.tr] true to enable the top-right control, false to disable it\n     * @param {Boolean} [options.mtr] true to enable the middle-top-rotate control, false to disable it\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    setControlsVisibility: function setControlsVisibility(options) {\n      options || (options = {});\n\n      for (var p in options) {\n        this.setControlVisible(p, options[p]);\n      }\n\n      return this;\n    },\n\n    /**\n     * Returns the instance of the control visibility set for this object.\n     * @private\n     * @returns {Object}\n     */\n    _getControlsVisibility: function _getControlsVisibility() {\n      if (!this._controlsVisibility) {\n        this._controlsVisibility = {\n          tl: true,\n          tr: true,\n          br: true,\n          bl: true,\n          ml: true,\n          mt: true,\n          mr: true,\n          mb: true,\n          mtr: true\n        };\n      }\n\n      return this._controlsVisibility;\n    },\n\n    /**\n     * This callback function is called every time _discardActiveObject or _setActiveObject\n     * try to to deselect this object. If the function returns true, the process is cancelled\n     * @param {Object} [options] options sent from the upper functions\n     * @param {Event} [options.e] event if the process is generated by an event\n     */\n    onDeselect: function onDeselect() {// implemented by sub-classes, as needed.\n    },\n\n    /**\n     * This callback function is called every time _discardActiveObject or _setActiveObject\n     * try to to select this object. If the function returns true, the process is cancelled\n     * @param {Object} [options] options sent from the upper functions\n     * @param {Event} [options.e] event if the process is generated by an event\n     */\n    onSelect: function onSelect() {// implemented by sub-classes, as needed.\n    }\n  });\n})();\n\nfabric.util.object.extend(fabric.StaticCanvas.prototype,\n/** @lends fabric.StaticCanvas.prototype */\n{\n  /**\n   * Animation duration (in ms) for fx* methods\n   * @type Number\n   * @default\n   */\n  FX_DURATION: 500,\n\n  /**\n   * Centers object horizontally with animation.\n   * @param {fabric.Object} object Object to center\n   * @param {Object} [callbacks] Callbacks object with optional \"onComplete\" and/or \"onChange\" properties\n   * @param {Function} [callbacks.onComplete] Invoked on completion\n   * @param {Function} [callbacks.onChange] Invoked on every step of animation\n   * @return {fabric.Canvas} thisArg\n   * @chainable\n   */\n  fxCenterObjectH: function fxCenterObjectH(object, callbacks) {\n    callbacks = callbacks || {};\n\n    var empty = function empty() {},\n        _onComplete = callbacks.onComplete || empty,\n        _onChange = callbacks.onChange || empty,\n        _this = this;\n\n    fabric.util.animate({\n      startValue: object.left,\n      endValue: this.getCenter().left,\n      duration: this.FX_DURATION,\n      onChange: function onChange(value) {\n        object.set('left', value);\n\n        _this.requestRenderAll();\n\n        _onChange();\n      },\n      onComplete: function onComplete() {\n        object.setCoords();\n\n        _onComplete();\n      }\n    });\n    return this;\n  },\n\n  /**\n   * Centers object vertically with animation.\n   * @param {fabric.Object} object Object to center\n   * @param {Object} [callbacks] Callbacks object with optional \"onComplete\" and/or \"onChange\" properties\n   * @param {Function} [callbacks.onComplete] Invoked on completion\n   * @param {Function} [callbacks.onChange] Invoked on every step of animation\n   * @return {fabric.Canvas} thisArg\n   * @chainable\n   */\n  fxCenterObjectV: function fxCenterObjectV(object, callbacks) {\n    callbacks = callbacks || {};\n\n    var empty = function empty() {},\n        _onComplete2 = callbacks.onComplete || empty,\n        _onChange2 = callbacks.onChange || empty,\n        _this = this;\n\n    fabric.util.animate({\n      startValue: object.top,\n      endValue: this.getCenter().top,\n      duration: this.FX_DURATION,\n      onChange: function onChange(value) {\n        object.set('top', value);\n\n        _this.requestRenderAll();\n\n        _onChange2();\n      },\n      onComplete: function onComplete() {\n        object.setCoords();\n\n        _onComplete2();\n      }\n    });\n    return this;\n  },\n\n  /**\n   * Same as `fabric.Canvas#remove` but animated\n   * @param {fabric.Object} object Object to remove\n   * @param {Object} [callbacks] Callbacks object with optional \"onComplete\" and/or \"onChange\" properties\n   * @param {Function} [callbacks.onComplete] Invoked on completion\n   * @param {Function} [callbacks.onChange] Invoked on every step of animation\n   * @return {fabric.Canvas} thisArg\n   * @chainable\n   */\n  fxRemove: function fxRemove(object, callbacks) {\n    callbacks = callbacks || {};\n\n    var empty = function empty() {},\n        _onComplete3 = callbacks.onComplete || empty,\n        _onChange3 = callbacks.onChange || empty,\n        _this = this;\n\n    fabric.util.animate({\n      startValue: object.opacity,\n      endValue: 0,\n      duration: this.FX_DURATION,\n      onChange: function onChange(value) {\n        object.set('opacity', value);\n\n        _this.requestRenderAll();\n\n        _onChange3();\n      },\n      onComplete: function onComplete() {\n        _this.remove(object);\n\n        _onComplete3();\n      }\n    });\n    return this;\n  }\n});\nfabric.util.object.extend(fabric.Object.prototype,\n/** @lends fabric.Object.prototype */\n{\n  /**\n   * Animates object's properties\n   * @param {String|Object} property Property to animate (if string) or properties to animate (if object)\n   * @param {Number|Object} value Value to animate property to (if string was given first) or options object\n   * @return {fabric.Object} thisArg\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#animation}\n   * @chainable\n   *\n   * As object — multiple properties\n   *\n   * object.animate({ left: ..., top: ... });\n   * object.animate({ left: ..., top: ... }, { duration: ... });\n   *\n   * As string — one property\n   *\n   * object.animate('left', ...);\n   * object.animate('left', { duration: ... });\n   *\n   */\n  animate: function animate() {\n    if (arguments[0] && _typeof(arguments[0]) === 'object') {\n      var propsToAnimate = [],\n          prop,\n          skipCallbacks;\n\n      for (prop in arguments[0]) {\n        propsToAnimate.push(prop);\n      }\n\n      for (var i = 0, len = propsToAnimate.length; i < len; i++) {\n        prop = propsToAnimate[i];\n        skipCallbacks = i !== len - 1;\n\n        this._animate(prop, arguments[0][prop], arguments[1], skipCallbacks);\n      }\n    } else {\n      this._animate.apply(this, arguments);\n    }\n\n    return this;\n  },\n\n  /**\n   * @private\n   * @param {String} property Property to animate\n   * @param {String} to Value to animate to\n   * @param {Object} [options] Options object\n   * @param {Boolean} [skipCallbacks] When true, callbacks like onchange and oncomplete are not invoked\n   */\n  _animate: function _animate(property, to, options, skipCallbacks) {\n    var _this = this,\n        propPair;\n\n    to = to.toString();\n\n    if (!options) {\n      options = {};\n    } else {\n      options = fabric.util.object.clone(options);\n    }\n\n    if (~property.indexOf('.')) {\n      propPair = property.split('.');\n    }\n\n    var currentValue = propPair ? this.get(propPair[0])[propPair[1]] : this.get(property);\n\n    if (!('from' in options)) {\n      options.from = currentValue;\n    }\n\n    if (~to.indexOf('=')) {\n      to = currentValue + parseFloat(to.replace('=', ''));\n    } else {\n      to = parseFloat(to);\n    }\n\n    fabric.util.animate({\n      startValue: options.from,\n      endValue: to,\n      byValue: options.by,\n      easing: options.easing,\n      duration: options.duration,\n      abort: options.abort && function () {\n        return options.abort.call(_this);\n      },\n      onChange: function onChange(value, valueProgress, timeProgress) {\n        if (propPair) {\n          _this[propPair[0]][propPair[1]] = value;\n        } else {\n          _this.set(property, value);\n        }\n\n        if (skipCallbacks) {\n          return;\n        }\n\n        options.onChange && options.onChange(value, valueProgress, timeProgress);\n      },\n      onComplete: function onComplete(value, valueProgress, timeProgress) {\n        if (skipCallbacks) {\n          return;\n        }\n\n        _this.setCoords();\n\n        options.onComplete && options.onComplete(value, valueProgress, timeProgress);\n      }\n    });\n  }\n});\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      extend = fabric.util.object.extend,\n      clone = fabric.util.object.clone,\n      coordProps = {\n    x1: 1,\n    x2: 1,\n    y1: 1,\n    y2: 1\n  },\n      supportsLineDash = fabric.StaticCanvas.supports('setLineDash');\n\n  if (fabric.Line) {\n    fabric.warn('fabric.Line is already defined');\n    return;\n  }\n  /**\n   * Line class\n   * @class fabric.Line\n   * @extends fabric.Object\n   * @see {@link fabric.Line#initialize} for constructor definition\n   */\n\n\n  fabric.Line = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Line.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'line',\n\n    /**\n     * x value or first line edge\n     * @type Number\n     * @default\n     */\n    x1: 0,\n\n    /**\n     * y value or first line edge\n     * @type Number\n     * @default\n     */\n    y1: 0,\n\n    /**\n     * x value or second line edge\n     * @type Number\n     * @default\n     */\n    x2: 0,\n\n    /**\n     * y value or second line edge\n     * @type Number\n     * @default\n     */\n    y2: 0,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('x1', 'x2', 'y1', 'y2'),\n\n    /**\n     * Constructor\n     * @param {Array} [points] Array of points\n     * @param {Object} [options] Options object\n     * @return {fabric.Line} thisArg\n     */\n    initialize: function initialize(points, options) {\n      if (!points) {\n        points = [0, 0, 0, 0];\n      }\n\n      this.callSuper('initialize', options);\n      this.set('x1', points[0]);\n      this.set('y1', points[1]);\n      this.set('x2', points[2]);\n      this.set('y2', points[3]);\n\n      this._setWidthHeight(options);\n    },\n\n    /**\n     * @private\n     * @param {Object} [options] Options\n     */\n    _setWidthHeight: function _setWidthHeight(options) {\n      options || (options = {});\n      this.width = Math.abs(this.x2 - this.x1);\n      this.height = Math.abs(this.y2 - this.y1);\n      this.left = 'left' in options ? options.left : this._getLeftToOriginX();\n      this.top = 'top' in options ? options.top : this._getTopToOriginY();\n    },\n\n    /**\n     * @private\n     * @param {String} key\n     * @param {*} value\n     */\n    _set: function _set(key, value) {\n      this.callSuper('_set', key, value);\n\n      if (typeof coordProps[key] !== 'undefined') {\n        this._setWidthHeight();\n      }\n\n      return this;\n    },\n\n    /**\n     * @private\n     * @return {Number} leftToOriginX Distance from left edge of canvas to originX of Line.\n     */\n    _getLeftToOriginX: makeEdgeToOriginGetter({\n      // property names\n      origin: 'originX',\n      axis1: 'x1',\n      axis2: 'x2',\n      dimension: 'width'\n    }, {\n      // possible values of origin\n      nearest: 'left',\n      center: 'center',\n      farthest: 'right'\n    }),\n\n    /**\n     * @private\n     * @return {Number} topToOriginY Distance from top edge of canvas to originY of Line.\n     */\n    _getTopToOriginY: makeEdgeToOriginGetter({\n      // property names\n      origin: 'originY',\n      axis1: 'y1',\n      axis2: 'y2',\n      dimension: 'height'\n    }, {\n      // possible values of origin\n      nearest: 'top',\n      center: 'center',\n      farthest: 'bottom'\n    }),\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      ctx.beginPath();\n\n      if (!this.strokeDashArray || this.strokeDashArray && supportsLineDash) {\n        // move from center (of virtual box) to its left/top corner\n        // we can't assume x1, y1 is top left and x2, y2 is bottom right\n        var p = this.calcLinePoints();\n        ctx.moveTo(p.x1, p.y1);\n        ctx.lineTo(p.x2, p.y2);\n      }\n\n      ctx.lineWidth = this.strokeWidth; // TODO: test this\n      // make sure setting \"fill\" changes color of a line\n      // (by copying fillStyle to strokeStyle, since line is stroked, not filled)\n\n      var origStrokeStyle = ctx.strokeStyle;\n      ctx.strokeStyle = this.stroke || ctx.fillStyle;\n      this.stroke && this._renderStroke(ctx);\n      ctx.strokeStyle = origStrokeStyle;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      var p = this.calcLinePoints();\n      ctx.beginPath();\n      fabric.util.drawDashedLine(ctx, p.x1, p.y1, p.x2, p.y2, this.strokeDashArray);\n      ctx.closePath();\n    },\n\n    /**\n     * This function is an helper for svg import. it returns the center of the object in the svg\n     * untransformed coordinates\n     * @private\n     * @return {Object} center point from element coordinates\n     */\n    _findCenterFromElement: function _findCenterFromElement() {\n      return {\n        x: (this.x1 + this.x2) / 2,\n        y: (this.y1 + this.y2) / 2\n      };\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @methd toObject\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return extend(this.callSuper('toObject', propertiesToInclude), this.calcLinePoints());\n    },\n\n    /*\n     * Calculate object dimensions from its properties\n     * @private\n     */\n    _getNonTransformedDimensions: function _getNonTransformedDimensions() {\n      var dim = this.callSuper('_getNonTransformedDimensions');\n\n      if (this.strokeLineCap === 'butt') {\n        if (this.width === 0) {\n          dim.y -= this.strokeWidth;\n        }\n\n        if (this.height === 0) {\n          dim.x -= this.strokeWidth;\n        }\n      }\n\n      return dim;\n    },\n\n    /**\n     * Recalculates line points given width and height\n     * @private\n     */\n    calcLinePoints: function calcLinePoints() {\n      var xMult = this.x1 <= this.x2 ? -1 : 1,\n          yMult = this.y1 <= this.y2 ? -1 : 1,\n          x1 = xMult * this.width * 0.5,\n          y1 = yMult * this.height * 0.5,\n          x2 = xMult * this.width * -0.5,\n          y2 = yMult * this.height * -0.5;\n      return {\n        x1: x1,\n        x2: x2,\n        y1: y1,\n        y2: y2\n      };\n    }\n  });\n  /**\n   * Returns fabric.Line instance from an object representation\n   * @static\n   * @memberOf fabric.Line\n   * @param {Object} object Object to create an instance from\n   * @param {function} [callback] invoked with new instance as first argument\n   */\n\n  fabric.Line.fromObject = function (object, callback) {\n    function _callback(instance) {\n      delete instance.points;\n      callback && callback(instance);\n    }\n\n    ;\n    var options = clone(object, true);\n    options.points = [object.x1, object.y1, object.x2, object.y2];\n\n    fabric.Object._fromObject('Line', options, _callback, 'points');\n  };\n  /**\n   * Produces a function that calculates distance from canvas edge to Line origin.\n   */\n\n\n  function makeEdgeToOriginGetter(propertyNames, originValues) {\n    var origin = propertyNames.origin,\n        axis1 = propertyNames.axis1,\n        axis2 = propertyNames.axis2,\n        dimension = propertyNames.dimension,\n        nearest = originValues.nearest,\n        center = originValues.center,\n        farthest = originValues.farthest;\n    return function () {\n      switch (this.get(origin)) {\n        case nearest:\n          return Math.min(this.get(axis1), this.get(axis2));\n\n        case center:\n          return Math.min(this.get(axis1), this.get(axis2)) + 0.5 * this.get(dimension);\n\n        case farthest:\n          return Math.max(this.get(axis1), this.get(axis2));\n      }\n    };\n  }\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      pi = Math.PI;\n\n  if (fabric.Circle) {\n    fabric.warn('fabric.Circle is already defined.');\n    return;\n  }\n  /**\n   * Circle class\n   * @class fabric.Circle\n   * @extends fabric.Object\n   * @see {@link fabric.Circle#initialize} for constructor definition\n   */\n\n\n  fabric.Circle = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Circle.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'circle',\n\n    /**\n     * Radius of this circle\n     * @type Number\n     * @default\n     */\n    radius: 0,\n\n    /**\n     * Start angle of the circle, moving clockwise\n     * deprectated type, this should be in degree, this was an oversight.\n     * probably will change to degrees in next major version\n     * @type Number\n     * @default 0\n     */\n    startAngle: 0,\n\n    /**\n     * End angle of the circle\n     * deprectated type, this should be in degree, this was an oversight.\n     * probably will change to degrees in next major version\n     * @type Number\n     * @default 2Pi\n     */\n    endAngle: pi * 2,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('radius', 'startAngle', 'endAngle'),\n\n    /**\n     * @private\n     * @param {String} key\n     * @param {*} value\n     * @return {fabric.Circle} thisArg\n     */\n    _set: function _set(key, value) {\n      this.callSuper('_set', key, value);\n\n      if (key === 'radius') {\n        this.setRadius(value);\n      }\n\n      return this;\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return this.callSuper('toObject', ['radius', 'startAngle', 'endAngle'].concat(propertiesToInclude));\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx context to render on\n     */\n    _render: function _render(ctx) {\n      ctx.beginPath();\n      ctx.arc(0, 0, this.radius, this.startAngle, this.endAngle, false);\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * Returns horizontal radius of an object (according to how an object is scaled)\n     * @return {Number}\n     */\n    getRadiusX: function getRadiusX() {\n      return this.get('radius') * this.get('scaleX');\n    },\n\n    /**\n     * Returns vertical radius of an object (according to how an object is scaled)\n     * @return {Number}\n     */\n    getRadiusY: function getRadiusY() {\n      return this.get('radius') * this.get('scaleY');\n    },\n\n    /**\n     * Sets radius of an object (and updates width accordingly)\n     * @return {fabric.Circle} thisArg\n     */\n    setRadius: function setRadius(value) {\n      this.radius = value;\n      return this.set('width', value * 2).set('height', value * 2);\n    }\n  });\n  /**\n   * Returns {@link fabric.Circle} instance from an object representation\n   * @static\n   * @memberOf fabric.Circle\n   * @param {Object} object Object to create an instance from\n   * @param {function} [callback] invoked with new instance as first argument\n   * @return {Object} Instance of fabric.Circle\n   */\n\n  fabric.Circle.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Circle', object, callback);\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.Triangle) {\n    fabric.warn('fabric.Triangle is already defined');\n    return;\n  }\n  /**\n   * Triangle class\n   * @class fabric.Triangle\n   * @extends fabric.Object\n   * @return {fabric.Triangle} thisArg\n   * @see {@link fabric.Triangle#initialize} for constructor definition\n   */\n\n\n  fabric.Triangle = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Triangle.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'triangle',\n\n    /**\n     * Width is set to 100 to compensate the old initialize code that was setting it to 100\n     * @type Number\n     * @default\n     */\n    width: 100,\n\n    /**\n     * Height is set to 100 to compensate the old initialize code that was setting it to 100\n     * @type Number\n     * @default\n     */\n    height: 100,\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      var widthBy2 = this.width / 2,\n          heightBy2 = this.height / 2;\n      ctx.beginPath();\n      ctx.moveTo(-widthBy2, heightBy2);\n      ctx.lineTo(0, -heightBy2);\n      ctx.lineTo(widthBy2, heightBy2);\n      ctx.closePath();\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      var widthBy2 = this.width / 2,\n          heightBy2 = this.height / 2;\n      ctx.beginPath();\n      fabric.util.drawDashedLine(ctx, -widthBy2, heightBy2, 0, -heightBy2, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, 0, -heightBy2, widthBy2, heightBy2, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, widthBy2, heightBy2, -widthBy2, heightBy2, this.strokeDashArray);\n      ctx.closePath();\n    }\n  });\n  /**\n   * Returns {@link fabric.Triangle} instance from an object representation\n   * @static\n   * @memberOf fabric.Triangle\n   * @param {Object} object Object to create an instance from\n   * @param {function} [callback] invoked with new instance as first argument\n   */\n\n  fabric.Triangle.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Triangle', object, callback);\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      piBy2 = Math.PI * 2;\n\n  if (fabric.Ellipse) {\n    fabric.warn('fabric.Ellipse is already defined.');\n    return;\n  }\n  /**\n   * Ellipse class\n   * @class fabric.Ellipse\n   * @extends fabric.Object\n   * @return {fabric.Ellipse} thisArg\n   * @see {@link fabric.Ellipse#initialize} for constructor definition\n   */\n\n\n  fabric.Ellipse = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Ellipse.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'ellipse',\n\n    /**\n     * Horizontal radius\n     * @type Number\n     * @default\n     */\n    rx: 0,\n\n    /**\n     * Vertical radius\n     * @type Number\n     * @default\n     */\n    ry: 0,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('rx', 'ry'),\n\n    /**\n     * Constructor\n     * @param {Object} [options] Options object\n     * @return {fabric.Ellipse} thisArg\n     */\n    initialize: function initialize(options) {\n      this.callSuper('initialize', options);\n      this.set('rx', options && options.rx || 0);\n      this.set('ry', options && options.ry || 0);\n    },\n\n    /**\n     * @private\n     * @param {String} key\n     * @param {*} value\n     * @return {fabric.Ellipse} thisArg\n     */\n    _set: function _set(key, value) {\n      this.callSuper('_set', key, value);\n\n      switch (key) {\n        case 'rx':\n          this.rx = value;\n          this.set('width', value * 2);\n          break;\n\n        case 'ry':\n          this.ry = value;\n          this.set('height', value * 2);\n          break;\n      }\n\n      return this;\n    },\n\n    /**\n     * Returns horizontal radius of an object (according to how an object is scaled)\n     * @return {Number}\n     */\n    getRx: function getRx() {\n      return this.get('rx') * this.get('scaleX');\n    },\n\n    /**\n     * Returns Vertical radius of an object (according to how an object is scaled)\n     * @return {Number}\n     */\n    getRy: function getRy() {\n      return this.get('ry') * this.get('scaleY');\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude));\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx context to render on\n     */\n    _render: function _render(ctx) {\n      ctx.beginPath();\n      ctx.save();\n      ctx.transform(1, 0, 0, this.ry / this.rx, 0, 0);\n      ctx.arc(0, 0, this.rx, 0, piBy2, false);\n      ctx.restore();\n\n      this._renderPaintInOrder(ctx);\n    }\n  });\n  /**\n   * Returns {@link fabric.Ellipse} instance from an object representation\n   * @static\n   * @memberOf fabric.Ellipse\n   * @param {Object} object Object to create an instance from\n   * @param {function} [callback] invoked with new instance as first argument\n   * @return {fabric.Ellipse}\n   */\n\n  fabric.Ellipse.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Ellipse', object, callback);\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      extend = fabric.util.object.extend;\n\n  if (fabric.Rect) {\n    fabric.warn('fabric.Rect is already defined');\n    return;\n  }\n  /**\n   * Rectangle class\n   * @class fabric.Rect\n   * @extends fabric.Object\n   * @return {fabric.Rect} thisArg\n   * @see {@link fabric.Rect#initialize} for constructor definition\n   */\n\n\n  fabric.Rect = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Rect.prototype */\n  {\n    /**\n     * List of properties to consider when checking if state of an object is changed ({@link fabric.Object#hasStateChanged})\n     * as well as for history (undo/redo) purposes\n     * @type Array\n     */\n    stateProperties: fabric.Object.prototype.stateProperties.concat('rx', 'ry'),\n\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'rect',\n\n    /**\n     * Horizontal border radius\n     * @type Number\n     * @default\n     */\n    rx: 0,\n\n    /**\n     * Vertical border radius\n     * @type Number\n     * @default\n     */\n    ry: 0,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('rx', 'ry'),\n\n    /**\n     * Constructor\n     * @param {Object} [options] Options object\n     * @return {Object} thisArg\n     */\n    initialize: function initialize(options) {\n      this.callSuper('initialize', options);\n\n      this._initRxRy();\n    },\n\n    /**\n     * Initializes rx/ry attributes\n     * @private\n     */\n    _initRxRy: function _initRxRy() {\n      if (this.rx && !this.ry) {\n        this.ry = this.rx;\n      } else if (this.ry && !this.rx) {\n        this.rx = this.ry;\n      }\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      // 1x1 case (used in spray brush) optimization was removed because\n      // with caching and higher zoom level this makes more damage than help\n      var rx = this.rx ? Math.min(this.rx, this.width / 2) : 0,\n          ry = this.ry ? Math.min(this.ry, this.height / 2) : 0,\n          w = this.width,\n          h = this.height,\n          x = -this.width / 2,\n          y = -this.height / 2,\n          isRounded = rx !== 0 || ry !== 0,\n\n      /* \"magic number\" for bezier approximations of arcs (http://itc.ktu.lt/itc354/Riskus354.pdf) */\n      k = 1 - 0.5522847498;\n      ctx.beginPath();\n      ctx.moveTo(x + rx, y);\n      ctx.lineTo(x + w - rx, y);\n      isRounded && ctx.bezierCurveTo(x + w - k * rx, y, x + w, y + k * ry, x + w, y + ry);\n      ctx.lineTo(x + w, y + h - ry);\n      isRounded && ctx.bezierCurveTo(x + w, y + h - k * ry, x + w - k * rx, y + h, x + w - rx, y + h);\n      ctx.lineTo(x + rx, y + h);\n      isRounded && ctx.bezierCurveTo(x + k * rx, y + h, x, y + h - k * ry, x, y + h - ry);\n      ctx.lineTo(x, y + ry);\n      isRounded && ctx.bezierCurveTo(x, y + k * ry, x + k * rx, y, x + rx, y);\n      ctx.closePath();\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      var x = -this.width / 2,\n          y = -this.height / 2,\n          w = this.width,\n          h = this.height;\n      ctx.beginPath();\n      fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray);\n      ctx.closePath();\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude));\n    }\n  });\n  /**\n   * Returns {@link fabric.Rect} instance from an object representation\n   * @static\n   * @memberOf fabric.Rect\n   * @param {Object} object Object to create an instance from\n   * @param {Function} [callback] Callback to invoke when an fabric.Rect instance is created\n   */\n\n  fabric.Rect.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Rect', object, callback);\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      extend = fabric.util.object.extend,\n      min = fabric.util.array.min,\n      max = fabric.util.array.max,\n      toFixed = fabric.util.toFixed;\n\n  if (fabric.Polyline) {\n    fabric.warn('fabric.Polyline is already defined');\n    return;\n  }\n  /**\n   * Polyline class\n   * @class fabric.Polyline\n   * @extends fabric.Object\n   * @see {@link fabric.Polyline#initialize} for constructor definition\n   */\n\n\n  fabric.Polyline = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Polyline.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'polyline',\n\n    /**\n     * Points array\n     * @type Array\n     * @default\n     */\n    points: null,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('points'),\n\n    /**\n     * Constructor\n     * @param {Array} points Array of points (where each point is an object with x and y)\n     * @param {Object} [options] Options object\n     * @return {fabric.Polyline} thisArg\n     * @example\n     * var poly = new fabric.Polyline([\n     *     { x: 10, y: 10 },\n     *     { x: 50, y: 30 },\n     *     { x: 40, y: 70 },\n     *     { x: 60, y: 50 },\n     *     { x: 100, y: 150 },\n     *     { x: 40, y: 100 }\n     *   ], {\n     *   stroke: 'red',\n     *   left: 100,\n     *   top: 100\n     * });\n     */\n    initialize: function initialize(points, options) {\n      options = options || {};\n      this.points = points || [];\n      this.callSuper('initialize', options);\n\n      this._setPositionDimensions(options);\n    },\n    _setPositionDimensions: function _setPositionDimensions(options) {\n      var calcDim = this._calcDimensions(options),\n          correctLeftTop;\n\n      this.width = calcDim.width;\n      this.height = calcDim.height;\n\n      if (!options.fromSVG) {\n        correctLeftTop = this.translateToGivenOrigin({\n          x: calcDim.left - this.strokeWidth / 2,\n          y: calcDim.top - this.strokeWidth / 2\n        }, 'left', 'top', this.originX, this.originY);\n      }\n\n      if (typeof options.left === 'undefined') {\n        this.left = options.fromSVG ? calcDim.left : correctLeftTop.x;\n      }\n\n      if (typeof options.top === 'undefined') {\n        this.top = options.fromSVG ? calcDim.top : correctLeftTop.y;\n      }\n\n      this.pathOffset = {\n        x: calcDim.left + this.width / 2,\n        y: calcDim.top + this.height / 2\n      };\n    },\n\n    /**\n     * Calculate the polygon min and max point from points array,\n     * returning an object with left, top, widht, height to measure the\n     * polygon size\n     * @return {Object} object.left X coordinate of the polygon leftmost point\n     * @return {Object} object.top Y coordinate of the polygon topmost point\n     * @return {Object} object.width distance between X coordinates of the polygon leftmost and rightmost point\n     * @return {Object} object.height distance between Y coordinates of the polygon topmost and bottommost point\n     * @private\n     */\n    _calcDimensions: function _calcDimensions() {\n      var points = this.points,\n          minX = min(points, 'x') || 0,\n          minY = min(points, 'y') || 0,\n          maxX = max(points, 'x') || 0,\n          maxY = max(points, 'y') || 0,\n          width = maxX - minX,\n          height = maxY - minY;\n      return {\n        left: minX,\n        top: minY,\n        width: width,\n        height: height\n      };\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} Object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return extend(this.callSuper('toObject', propertiesToInclude), {\n        points: this.points.concat()\n      });\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    commonRender: function commonRender(ctx) {\n      var point,\n          len = this.points.length,\n          x = this.pathOffset.x,\n          y = this.pathOffset.y;\n\n      if (!len || isNaN(this.points[len - 1].y)) {\n        // do not draw if no points or odd points\n        // NaN comes from parseFloat of a empty string in parser\n        return false;\n      }\n\n      ctx.beginPath();\n      ctx.moveTo(this.points[0].x - x, this.points[0].y - y);\n\n      for (var i = 0; i < len; i++) {\n        point = this.points[i];\n        ctx.lineTo(point.x - x, point.y - y);\n      }\n\n      return true;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      if (!this.commonRender(ctx)) {\n        return;\n      }\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      var p1, p2;\n      ctx.beginPath();\n\n      for (var i = 0, len = this.points.length; i < len; i++) {\n        p1 = this.points[i];\n        p2 = this.points[i + 1] || p1;\n        fabric.util.drawDashedLine(ctx, p1.x, p1.y, p2.x, p2.y, this.strokeDashArray);\n      }\n    },\n\n    /**\n     * Returns complexity of an instance\n     * @return {Number} complexity of this instance\n     */\n    complexity: function complexity() {\n      return this.get('points').length;\n    }\n  });\n  /**\n   * Returns fabric.Polyline instance from an object representation\n   * @static\n   * @memberOf fabric.Polyline\n   * @param {Object} object Object to create an instance from\n   * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created\n   */\n\n  fabric.Polyline.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Polyline', object, callback, 'points');\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.Polygon) {\n    fabric.warn('fabric.Polygon is already defined');\n    return;\n  }\n  /**\n   * Polygon class\n   * @class fabric.Polygon\n   * @extends fabric.Polyline\n   * @see {@link fabric.Polygon#initialize} for constructor definition\n   */\n\n\n  fabric.Polygon = fabric.util.createClass(fabric.Polyline,\n  /** @lends fabric.Polygon.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'polygon',\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      if (!this.commonRender(ctx)) {\n        return;\n      }\n\n      ctx.closePath();\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      this.callSuper('_renderDashedStroke', ctx);\n      ctx.closePath();\n    }\n  });\n  /**\n   * Returns fabric.Polygon instance from an object representation\n   * @static\n   * @memberOf fabric.Polygon\n   * @param {Object} object Object to create an instance from\n   * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created\n   */\n\n  fabric.Polygon.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Polygon', object, callback, 'points');\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      min = fabric.util.array.min,\n      max = fabric.util.array.max,\n      extend = fabric.util.object.extend,\n      _toString = Object.prototype.toString,\n      drawArc = fabric.util.drawArc,\n      toFixed = fabric.util.toFixed,\n      commandLengths = {\n    m: 2,\n    l: 2,\n    h: 1,\n    v: 1,\n    c: 6,\n    s: 4,\n    q: 4,\n    t: 2,\n    a: 7\n  },\n      repeatedCommands = {\n    m: 'l',\n    M: 'L'\n  };\n\n  if (fabric.Path) {\n    fabric.warn('fabric.Path is already defined');\n    return;\n  }\n  /**\n   * Path class\n   * @class fabric.Path\n   * @extends fabric.Object\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#path_and_pathgroup}\n   * @see {@link fabric.Path#initialize} for constructor definition\n   */\n\n\n  fabric.Path = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Path.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'path',\n\n    /**\n     * Array of path points\n     * @type Array\n     * @default\n     */\n    path: null,\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('path', 'fillRule'),\n    stateProperties: fabric.Object.prototype.stateProperties.concat('path'),\n\n    /**\n     * Constructor\n     * @param {Array|String} path Path data (sequence of coordinates and corresponding \"command\" tokens)\n     * @param {Object} [options] Options object\n     * @return {fabric.Path} thisArg\n     */\n    initialize: function initialize(path, options) {\n      options = options || {};\n      this.callSuper('initialize', options);\n\n      if (!path) {\n        path = [];\n      }\n\n      var fromArray = _toString.call(path) === '[object Array]';\n      this.path = fromArray ? path // one of commands (m,M,l,L,q,Q,c,C,etc.) followed by non-command characters (i.e. command values)\n      : path.match && path.match(/[mzlhvcsqta][^mzlhvcsqta]*/gi);\n\n      if (!this.path) {\n        return;\n      }\n\n      if (!fromArray) {\n        this.path = this._parsePath();\n      }\n\n      fabric.Polyline.prototype._setPositionDimensions.call(this, options);\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx context to render path on\n     */\n    _renderPathCommands: function _renderPathCommands(ctx) {\n      var current,\n          // current instruction\n      previous = null,\n          subpathStartX = 0,\n          subpathStartY = 0,\n          x = 0,\n          // current x\n      y = 0,\n          // current y\n      controlX = 0,\n          // current control point x\n      controlY = 0,\n          // current control point y\n      tempX,\n          tempY,\n          l = -this.pathOffset.x,\n          t = -this.pathOffset.y;\n      ctx.beginPath();\n\n      for (var i = 0, len = this.path.length; i < len; ++i) {\n        current = this.path[i];\n\n        switch (current[0]) {\n          // first letter\n          case 'l':\n            // lineto, relative\n            x += current[1];\n            y += current[2];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'L':\n            // lineto, absolute\n            x = current[1];\n            y = current[2];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'h':\n            // horizontal lineto, relative\n            x += current[1];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'H':\n            // horizontal lineto, absolute\n            x = current[1];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'v':\n            // vertical lineto, relative\n            y += current[1];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'V':\n            // verical lineto, absolute\n            y = current[1];\n            ctx.lineTo(x + l, y + t);\n            break;\n\n          case 'm':\n            // moveTo, relative\n            x += current[1];\n            y += current[2];\n            subpathStartX = x;\n            subpathStartY = y;\n            ctx.moveTo(x + l, y + t);\n            break;\n\n          case 'M':\n            // moveTo, absolute\n            x = current[1];\n            y = current[2];\n            subpathStartX = x;\n            subpathStartY = y;\n            ctx.moveTo(x + l, y + t);\n            break;\n\n          case 'c':\n            // bezierCurveTo, relative\n            tempX = x + current[5];\n            tempY = y + current[6];\n            controlX = x + current[3];\n            controlY = y + current[4];\n            ctx.bezierCurveTo(x + current[1] + l, // x1\n            y + current[2] + t, // y1\n            controlX + l, // x2\n            controlY + t, // y2\n            tempX + l, tempY + t);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'C':\n            // bezierCurveTo, absolute\n            x = current[5];\n            y = current[6];\n            controlX = current[3];\n            controlY = current[4];\n            ctx.bezierCurveTo(current[1] + l, current[2] + t, controlX + l, controlY + t, x + l, y + t);\n            break;\n\n          case 's':\n            // shorthand cubic bezierCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[3];\n            tempY = y + current[4];\n\n            if (previous[0].match(/[CcSs]/) === null) {\n              // If there is no previous command or if the previous command was not a C, c, S, or s,\n              // the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control points\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            ctx.bezierCurveTo(controlX + l, controlY + t, x + current[1] + l, y + current[2] + t, tempX + l, tempY + t); // set control point to 2nd one of this command\n            // \"... the first control point is assumed to be\n            // the reflection of the second control point on\n            // the previous command relative to the current point.\"\n\n            controlX = x + current[1];\n            controlY = y + current[2];\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'S':\n            // shorthand cubic bezierCurveTo, absolute\n            tempX = current[3];\n            tempY = current[4];\n\n            if (previous[0].match(/[CcSs]/) === null) {\n              // If there is no previous command or if the previous command was not a C, c, S, or s,\n              // the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control points\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            ctx.bezierCurveTo(controlX + l, controlY + t, current[1] + l, current[2] + t, tempX + l, tempY + t);\n            x = tempX;\n            y = tempY; // set control point to 2nd one of this command\n            // \"... the first control point is assumed to be\n            // the reflection of the second control point on\n            // the previous command relative to the current point.\"\n\n            controlX = current[1];\n            controlY = current[2];\n            break;\n\n          case 'q':\n            // quadraticCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[3];\n            tempY = y + current[4];\n            controlX = x + current[1];\n            controlY = y + current[2];\n            ctx.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'Q':\n            // quadraticCurveTo, absolute\n            tempX = current[3];\n            tempY = current[4];\n            ctx.quadraticCurveTo(current[1] + l, current[2] + t, tempX + l, tempY + t);\n            x = tempX;\n            y = tempY;\n            controlX = current[1];\n            controlY = current[2];\n            break;\n\n          case 't':\n            // shorthand quadraticCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[1];\n            tempY = y + current[2];\n\n            if (previous[0].match(/[QqTt]/) === null) {\n              // If there is no previous command or if the previous command was not a Q, q, T or t,\n              // assume the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control point\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            ctx.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'T':\n            tempX = current[1];\n            tempY = current[2];\n\n            if (previous[0].match(/[QqTt]/) === null) {\n              // If there is no previous command or if the previous command was not a Q, q, T or t,\n              // assume the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control point\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            ctx.quadraticCurveTo(controlX + l, controlY + t, tempX + l, tempY + t);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'a':\n            // TODO: optimize this\n            drawArc(ctx, x + l, y + t, [current[1], current[2], current[3], current[4], current[5], current[6] + x + l, current[7] + y + t]);\n            x += current[6];\n            y += current[7];\n            break;\n\n          case 'A':\n            // TODO: optimize this\n            drawArc(ctx, x + l, y + t, [current[1], current[2], current[3], current[4], current[5], current[6] + l, current[7] + t]);\n            x = current[6];\n            y = current[7];\n            break;\n\n          case 'z':\n          case 'Z':\n            x = subpathStartX;\n            y = subpathStartY;\n            ctx.closePath();\n            break;\n        }\n\n        previous = current;\n      }\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx context to render path on\n     */\n    _render: function _render(ctx) {\n      this._renderPathCommands(ctx);\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * Returns string representation of an instance\n     * @return {String} string representation of an instance\n     */\n    toString: function toString() {\n      return '#<fabric.Path (' + this.complexity() + '): { \"top\": ' + this.top + ', \"left\": ' + this.left + ' }>';\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return extend(this.callSuper('toObject', propertiesToInclude), {\n        path: this.path.map(function (item) {\n          return item.slice();\n        })\n      });\n    },\n\n    /**\n     * Returns dataless object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toDatalessObject: function toDatalessObject(propertiesToInclude) {\n      var o = this.toObject(['sourcePath'].concat(propertiesToInclude));\n\n      if (o.sourcePath) {\n        delete o.path;\n      }\n\n      return o;\n    },\n\n    /**\n     * Returns number representation of an instance complexity\n     * @return {Number} complexity of this instance\n     */\n    complexity: function complexity() {\n      return this.path.length;\n    },\n\n    /**\n     * @private\n     */\n    _parsePath: function _parsePath() {\n      var result = [],\n          coords = [],\n          currentPath,\n          parsed,\n          re = fabric.rePathCommand,\n          match,\n          coordsStr;\n\n      for (var i = 0, coordsParsed, len = this.path.length; i < len; i++) {\n        currentPath = this.path[i];\n        coordsStr = currentPath.slice(1).trim();\n        coords.length = 0;\n\n        while (match = re.exec(coordsStr)) {\n          coords.push(match[0]);\n        }\n\n        coordsParsed = [currentPath.charAt(0)];\n\n        for (var j = 0, jlen = coords.length; j < jlen; j++) {\n          parsed = parseFloat(coords[j]);\n\n          if (!isNaN(parsed)) {\n            coordsParsed.push(parsed);\n          }\n        }\n\n        var command = coordsParsed[0],\n            commandLength = commandLengths[command.toLowerCase()],\n            repeatedCommand = repeatedCommands[command] || command;\n\n        if (coordsParsed.length - 1 > commandLength) {\n          for (var k = 1, klen = coordsParsed.length; k < klen; k += commandLength) {\n            result.push([command].concat(coordsParsed.slice(k, k + commandLength)));\n            command = repeatedCommand;\n          }\n        } else {\n          result.push(coordsParsed);\n        }\n      }\n\n      return result;\n    },\n\n    /**\n     * @private\n     */\n    _calcDimensions: function _calcDimensions() {\n      var aX = [],\n          aY = [],\n          current,\n          // current instruction\n      previous = null,\n          subpathStartX = 0,\n          subpathStartY = 0,\n          x = 0,\n          // current x\n      y = 0,\n          // current y\n      controlX = 0,\n          // current control point x\n      controlY = 0,\n          // current control point y\n      tempX,\n          tempY,\n          bounds;\n\n      for (var i = 0, len = this.path.length; i < len; ++i) {\n        current = this.path[i];\n\n        switch (current[0]) {\n          // first letter\n          case 'l':\n            // lineto, relative\n            x += current[1];\n            y += current[2];\n            bounds = [];\n            break;\n\n          case 'L':\n            // lineto, absolute\n            x = current[1];\n            y = current[2];\n            bounds = [];\n            break;\n\n          case 'h':\n            // horizontal lineto, relative\n            x += current[1];\n            bounds = [];\n            break;\n\n          case 'H':\n            // horizontal lineto, absolute\n            x = current[1];\n            bounds = [];\n            break;\n\n          case 'v':\n            // vertical lineto, relative\n            y += current[1];\n            bounds = [];\n            break;\n\n          case 'V':\n            // verical lineto, absolute\n            y = current[1];\n            bounds = [];\n            break;\n\n          case 'm':\n            // moveTo, relative\n            x += current[1];\n            y += current[2];\n            subpathStartX = x;\n            subpathStartY = y;\n            bounds = [];\n            break;\n\n          case 'M':\n            // moveTo, absolute\n            x = current[1];\n            y = current[2];\n            subpathStartX = x;\n            subpathStartY = y;\n            bounds = [];\n            break;\n\n          case 'c':\n            // bezierCurveTo, relative\n            tempX = x + current[5];\n            tempY = y + current[6];\n            controlX = x + current[3];\n            controlY = y + current[4];\n            bounds = fabric.util.getBoundsOfCurve(x, y, x + current[1], // x1\n            y + current[2], // y1\n            controlX, // x2\n            controlY, // y2\n            tempX, tempY);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'C':\n            // bezierCurveTo, absolute\n            controlX = current[3];\n            controlY = current[4];\n            bounds = fabric.util.getBoundsOfCurve(x, y, current[1], current[2], controlX, controlY, current[5], current[6]);\n            x = current[5];\n            y = current[6];\n            break;\n\n          case 's':\n            // shorthand cubic bezierCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[3];\n            tempY = y + current[4];\n\n            if (previous[0].match(/[CcSs]/) === null) {\n              // If there is no previous command or if the previous command was not a C, c, S, or s,\n              // the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control points\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, x + current[1], y + current[2], tempX, tempY); // set control point to 2nd one of this command\n            // \"... the first control point is assumed to be\n            // the reflection of the second control point on\n            // the previous command relative to the current point.\"\n\n            controlX = x + current[1];\n            controlY = y + current[2];\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'S':\n            // shorthand cubic bezierCurveTo, absolute\n            tempX = current[3];\n            tempY = current[4];\n\n            if (previous[0].match(/[CcSs]/) === null) {\n              // If there is no previous command or if the previous command was not a C, c, S, or s,\n              // the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control points\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, current[1], current[2], tempX, tempY);\n            x = tempX;\n            y = tempY; // set control point to 2nd one of this command\n            // \"... the first control point is assumed to be\n            // the reflection of the second control point on\n            // the previous command relative to the current point.\"\n\n            controlX = current[1];\n            controlY = current[2];\n            break;\n\n          case 'q':\n            // quadraticCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[3];\n            tempY = y + current[4];\n            controlX = x + current[1];\n            controlY = y + current[2];\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, controlX, controlY, tempX, tempY);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'Q':\n            // quadraticCurveTo, absolute\n            controlX = current[1];\n            controlY = current[2];\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, controlX, controlY, current[3], current[4]);\n            x = current[3];\n            y = current[4];\n            break;\n\n          case 't':\n            // shorthand quadraticCurveTo, relative\n            // transform to absolute x,y\n            tempX = x + current[1];\n            tempY = y + current[2];\n\n            if (previous[0].match(/[QqTt]/) === null) {\n              // If there is no previous command or if the previous command was not a Q, q, T or t,\n              // assume the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control point\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, controlX, controlY, tempX, tempY);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'T':\n            tempX = current[1];\n            tempY = current[2];\n\n            if (previous[0].match(/[QqTt]/) === null) {\n              // If there is no previous command or if the previous command was not a Q, q, T or t,\n              // assume the control point is coincident with the current point\n              controlX = x;\n              controlY = y;\n            } else {\n              // calculate reflection of previous control point\n              controlX = 2 * x - controlX;\n              controlY = 2 * y - controlY;\n            }\n\n            bounds = fabric.util.getBoundsOfCurve(x, y, controlX, controlY, controlX, controlY, tempX, tempY);\n            x = tempX;\n            y = tempY;\n            break;\n\n          case 'a':\n            // TODO: optimize this\n            bounds = fabric.util.getBoundsOfArc(x, y, current[1], current[2], current[3], current[4], current[5], current[6] + x, current[7] + y);\n            x += current[6];\n            y += current[7];\n            break;\n\n          case 'A':\n            // TODO: optimize this\n            bounds = fabric.util.getBoundsOfArc(x, y, current[1], current[2], current[3], current[4], current[5], current[6], current[7]);\n            x = current[6];\n            y = current[7];\n            break;\n\n          case 'z':\n          case 'Z':\n            x = subpathStartX;\n            y = subpathStartY;\n            break;\n        }\n\n        previous = current;\n        bounds.forEach(function (point) {\n          aX.push(point.x);\n          aY.push(point.y);\n        });\n        aX.push(x);\n        aY.push(y);\n      }\n\n      var minX = min(aX) || 0,\n          minY = min(aY) || 0,\n          maxX = max(aX) || 0,\n          maxY = max(aY) || 0,\n          deltaX = maxX - minX,\n          deltaY = maxY - minY;\n      return {\n        left: minX,\n        top: minY,\n        width: deltaX,\n        height: deltaY\n      };\n    }\n  });\n  /**\n   * Creates an instance of fabric.Path from an object\n   * @static\n   * @memberOf fabric.Path\n   * @param {Object} object\n   * @param {Function} [callback] Callback to invoke when an fabric.Path instance is created\n   */\n\n  fabric.Path.fromObject = function (object, callback) {\n    if (typeof object.sourcePath === 'string') {\n      var pathUrl = object.sourcePath;\n      fabric.loadSVGFromURL(pathUrl, function (elements) {\n        var path = elements[0];\n        path.setOptions(object);\n        callback && callback(path);\n      });\n    } else {\n      fabric.Object._fromObject('Path', object, callback, 'path');\n    }\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      min = fabric.util.array.min,\n      max = fabric.util.array.max;\n\n  if (fabric.Group) {\n    return;\n  }\n  /**\n   * Group class\n   * @class fabric.Group\n   * @extends fabric.Object\n   * @mixes fabric.Collection\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#groups}\n   * @see {@link fabric.Group#initialize} for constructor definition\n   */\n\n\n  fabric.Group = fabric.util.createClass(fabric.Object, fabric.Collection,\n  /** @lends fabric.Group.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'group',\n\n    /**\n     * Width of stroke\n     * @type Number\n     * @default\n     */\n    strokeWidth: 0,\n\n    /**\n     * Indicates if click, mouseover, mouseout events & hoverCursor should also check for subtargets\n     * @type Boolean\n     * @default\n     */\n    subTargetCheck: false,\n\n    /**\n     * Groups are container, do not render anything on theyr own, ence no cache properties\n     * @type Array\n     * @default\n     */\n    cacheProperties: [],\n\n    /**\n     * setOnGroup is a method used for TextBox that is no more used since 2.0.0 The behavior is still\n     * available setting this boolean to true.\n     * @type Boolean\n     * @since 2.0.0\n     * @default\n     */\n    useSetOnGroup: false,\n\n    /**\n     * Constructor\n     * @param {Object} objects Group objects\n     * @param {Object} [options] Options object\n     * @param {Boolean} [isAlreadyGrouped] if true, objects have been grouped already.\n     * @return {Object} thisArg\n     */\n    initialize: function initialize(objects, options, isAlreadyGrouped) {\n      options = options || {};\n      this._objects = []; // if objects enclosed in a group have been grouped already,\n      // we cannot change properties of objects.\n      // Thus we need to set options to group without objects,\n\n      isAlreadyGrouped && this.callSuper('initialize', options);\n      this._objects = objects || [];\n\n      for (var i = this._objects.length; i--;) {\n        this._objects[i].group = this;\n      }\n\n      if (!isAlreadyGrouped) {\n        var center = options && options.centerPoint; // we want to set origins before calculating the bounding box.\n        // so that the topleft can be set with that in mind.\n        // if specific top and left are passed, are overwritten later\n        // with the callSuper('initialize', options)\n\n        if (options.originX !== undefined) {\n          this.originX = options.originX;\n        }\n\n        if (options.originY !== undefined) {\n          this.originY = options.originY;\n        } // if coming from svg i do not want to calc bounds.\n        // i assume width and height are passed along options\n\n\n        center || this._calcBounds();\n\n        this._updateObjectsCoords(center);\n\n        delete options.centerPoint;\n        this.callSuper('initialize', options);\n      } else {\n        this._updateObjectsACoords();\n      }\n\n      this.setCoords();\n    },\n\n    /**\n     * @private\n     * @param {Boolean} [skipCoordsChange] if true, coordinates of objects enclosed in a group do not change\n     */\n    _updateObjectsACoords: function _updateObjectsACoords() {\n      var ignoreZoom = true,\n          skipAbsolute = true;\n\n      for (var i = this._objects.length; i--;) {\n        this._objects[i].setCoords(ignoreZoom, skipAbsolute);\n      }\n    },\n\n    /**\n     * @private\n     * @param {Boolean} [skipCoordsChange] if true, coordinates of objects enclosed in a group do not change\n     */\n    _updateObjectsCoords: function _updateObjectsCoords(center) {\n      var center = center || this.getCenterPoint();\n\n      for (var i = this._objects.length; i--;) {\n        this._updateObjectCoords(this._objects[i], center);\n      }\n    },\n\n    /**\n     * @private\n     * @param {Object} object\n     * @param {fabric.Point} center, current center of group.\n     */\n    _updateObjectCoords: function _updateObjectCoords(object, center) {\n      var objectLeft = object.left,\n          objectTop = object.top,\n          ignoreZoom = true,\n          skipAbsolute = true;\n      object.set({\n        left: objectLeft - center.x,\n        top: objectTop - center.y\n      });\n      object.group = this;\n      object.setCoords(ignoreZoom, skipAbsolute);\n    },\n\n    /**\n     * Returns string represenation of a group\n     * @return {String}\n     */\n    toString: function toString() {\n      return '#<fabric.Group: (' + this.complexity() + ')>';\n    },\n\n    /**\n     * Adds an object to a group; Then recalculates group's dimension, position.\n     * @param {Object} object\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    addWithUpdate: function addWithUpdate(object) {\n      this._restoreObjectsState();\n\n      fabric.util.resetObjectTransform(this);\n\n      if (object) {\n        this._objects.push(object);\n\n        object.group = this;\n\n        object._set('canvas', this.canvas);\n      }\n\n      this._calcBounds();\n\n      this._updateObjectsCoords();\n\n      this.setCoords();\n      this.dirty = true;\n      return this;\n    },\n\n    /**\n     * Removes an object from a group; Then recalculates group's dimension, position.\n     * @param {Object} object\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    removeWithUpdate: function removeWithUpdate(object) {\n      this._restoreObjectsState();\n\n      fabric.util.resetObjectTransform(this);\n      this.remove(object);\n\n      this._calcBounds();\n\n      this._updateObjectsCoords();\n\n      this.setCoords();\n      this.dirty = true;\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _onObjectAdded: function _onObjectAdded(object) {\n      this.dirty = true;\n      object.group = this;\n\n      object._set('canvas', this.canvas);\n    },\n\n    /**\n     * @private\n     */\n    _onObjectRemoved: function _onObjectRemoved(object) {\n      this.dirty = true;\n      delete object.group;\n    },\n\n    /**\n     * @private\n     */\n    _set: function _set(key, value) {\n      var i = this._objects.length;\n\n      if (this.useSetOnGroup) {\n        while (i--) {\n          this._objects[i].setOnGroup(key, value);\n        }\n      }\n\n      if (key === 'canvas') {\n        while (i--) {\n          this._objects[i]._set(key, value);\n        }\n      }\n\n      fabric.Object.prototype._set.call(this, key, value);\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      var _includeDefaultValues = this.includeDefaultValues;\n\n      var objsToObject = this._objects.map(function (obj) {\n        var originalDefaults = obj.includeDefaultValues;\n        obj.includeDefaultValues = _includeDefaultValues;\n\n        var _obj = obj.toObject(propertiesToInclude);\n\n        obj.includeDefaultValues = originalDefaults;\n        return _obj;\n      });\n\n      var obj = fabric.Object.prototype.toObject.call(this, propertiesToInclude);\n      obj.objects = objsToObject;\n      return obj;\n    },\n\n    /**\n     * Returns object representation of an instance, in dataless mode.\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toDatalessObject: function toDatalessObject(propertiesToInclude) {\n      var objsToObject,\n          sourcePath = this.sourcePath;\n\n      if (sourcePath) {\n        objsToObject = sourcePath;\n      } else {\n        var _includeDefaultValues = this.includeDefaultValues;\n        objsToObject = this._objects.map(function (obj) {\n          var originalDefaults = obj.includeDefaultValues;\n          obj.includeDefaultValues = _includeDefaultValues;\n\n          var _obj = obj.toDatalessObject(propertiesToInclude);\n\n          obj.includeDefaultValues = originalDefaults;\n          return _obj;\n        });\n      }\n\n      var obj = fabric.Object.prototype.toDatalessObject.call(this, propertiesToInclude);\n      obj.objects = objsToObject;\n      return obj;\n    },\n\n    /**\n     * Renders instance on a given context\n     * @param {CanvasRenderingContext2D} ctx context to render instance on\n     */\n    render: function render(ctx) {\n      this._transformDone = true;\n      this.callSuper('render', ctx);\n      this._transformDone = false;\n    },\n\n    /**\n     * Decide if the object should cache or not. Create its own cache level\n     * needsItsOwnCache should be used when the object drawing method requires\n     * a cache step. None of the fabric classes requires it.\n     * Generally you do not cache objects in groups because the group is already cached.\n     * @return {Boolean}\n     */\n    shouldCache: function shouldCache() {\n      var ownCache = fabric.Object.prototype.shouldCache.call(this);\n\n      if (ownCache) {\n        for (var i = 0, len = this._objects.length; i < len; i++) {\n          if (this._objects[i].willDrawShadow()) {\n            this.ownCaching = false;\n            return false;\n          }\n        }\n      }\n\n      return ownCache;\n    },\n\n    /**\n     * Check if this object or a child object will cast a shadow\n     * @return {Boolean}\n     */\n    willDrawShadow: function willDrawShadow() {\n      if (fabric.Object.prototype.willDrawShadow.call(this)) {\n        return true;\n      }\n\n      for (var i = 0, len = this._objects.length; i < len; i++) {\n        if (this._objects[i].willDrawShadow()) {\n          return true;\n        }\n      }\n\n      return false;\n    },\n\n    /**\n     * Check if this group or its parent group are caching, recursively up\n     * @return {Boolean}\n     */\n    isOnACache: function isOnACache() {\n      return this.ownCaching || this.group && this.group.isOnACache();\n    },\n\n    /**\n     * Execute the drawing operation for an object on a specified context\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    drawObject: function drawObject(ctx) {\n      for (var i = 0, len = this._objects.length; i < len; i++) {\n        this._objects[i].render(ctx);\n      }\n\n      this._drawClipPath(ctx);\n    },\n\n    /**\n     * Check if cache is dirty\n     */\n    isCacheDirty: function isCacheDirty(skipCanvas) {\n      if (this.callSuper('isCacheDirty', skipCanvas)) {\n        return true;\n      }\n\n      if (!this.statefullCache) {\n        return false;\n      }\n\n      for (var i = 0, len = this._objects.length; i < len; i++) {\n        if (this._objects[i].isCacheDirty(true)) {\n          if (this._cacheCanvas) {\n            // if this group has not a cache canvas there is nothing to clean\n            var x = this.cacheWidth / this.zoomX,\n                y = this.cacheHeight / this.zoomY;\n\n            this._cacheContext.clearRect(-x / 2, -y / 2, x, y);\n          }\n\n          return true;\n        }\n      }\n\n      return false;\n    },\n\n    /**\n     * Retores original state of each of group objects (original state is that which was before group was created).\n     * @private\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    _restoreObjectsState: function _restoreObjectsState() {\n      this._objects.forEach(this._restoreObjectState, this);\n\n      return this;\n    },\n\n    /**\n     * Realises the transform from this group onto the supplied object\n     * i.e. it tells you what would happen if the supplied object was in\n     * the group, and then the group was destroyed. It mutates the supplied\n     * object.\n     * @param {fabric.Object} object\n     * @return {fabric.Object} transformedObject\n     */\n    realizeTransform: function realizeTransform(object) {\n      var matrix = object.calcTransformMatrix(),\n          options = fabric.util.qrDecompose(matrix),\n          center = new fabric.Point(options.translateX, options.translateY);\n      object.flipX = false;\n      object.flipY = false;\n      object.set('scaleX', options.scaleX);\n      object.set('scaleY', options.scaleY);\n      object.skewX = options.skewX;\n      object.skewY = options.skewY;\n      object.angle = options.angle;\n      object.setPositionByOrigin(center, 'center', 'center');\n      return object;\n    },\n\n    /**\n     * Restores original state of a specified object in group\n     * @private\n     * @param {fabric.Object} object\n     * @return {fabric.Group} thisArg\n     */\n    _restoreObjectState: function _restoreObjectState(object) {\n      this.realizeTransform(object);\n      object.setCoords();\n      delete object.group;\n      return this;\n    },\n\n    /**\n     * Destroys a group (restoring state of its objects)\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    destroy: function destroy() {\n      // when group is destroyed objects needs to get a repaint to be eventually\n      // displayed on canvas.\n      this._objects.forEach(function (object) {\n        object.set('dirty', true);\n      });\n\n      return this._restoreObjectsState();\n    },\n\n    /**\n     * make a group an active selection, remove the group from canvas\n     * the group has to be on canvas for this to work.\n     * @return {fabric.ActiveSelection} thisArg\n     * @chainable\n     */\n    toActiveSelection: function toActiveSelection() {\n      if (!this.canvas) {\n        return;\n      }\n\n      var objects = this._objects,\n          canvas = this.canvas;\n      this._objects = [];\n      var options = this.toObject();\n      delete options.objects;\n      var activeSelection = new fabric.ActiveSelection([]);\n      activeSelection.set(options);\n      activeSelection.type = 'activeSelection';\n      canvas.remove(this);\n      objects.forEach(function (object) {\n        object.group = activeSelection;\n        object.dirty = true;\n        canvas.add(object);\n      });\n      activeSelection.canvas = canvas;\n      activeSelection._objects = objects;\n      canvas._activeObject = activeSelection;\n      activeSelection.setCoords();\n      return activeSelection;\n    },\n\n    /**\n     * Destroys a group (restoring state of its objects)\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    ungroupOnCanvas: function ungroupOnCanvas() {\n      return this._restoreObjectsState();\n    },\n\n    /**\n     * Sets coordinates of all objects inside group\n     * @return {fabric.Group} thisArg\n     * @chainable\n     */\n    setObjectsCoords: function setObjectsCoords() {\n      var ignoreZoom = true,\n          skipAbsolute = true;\n      this.forEachObject(function (object) {\n        object.setCoords(ignoreZoom, skipAbsolute);\n      });\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _calcBounds: function _calcBounds(onlyWidthHeight) {\n      var aX = [],\n          aY = [],\n          o,\n          prop,\n          props = ['tr', 'br', 'bl', 'tl'],\n          i = 0,\n          iLen = this._objects.length,\n          j,\n          jLen = props.length,\n          ignoreZoom = true;\n\n      for (; i < iLen; ++i) {\n        o = this._objects[i];\n        o.setCoords(ignoreZoom);\n\n        for (j = 0; j < jLen; j++) {\n          prop = props[j];\n          aX.push(o.oCoords[prop].x);\n          aY.push(o.oCoords[prop].y);\n        }\n      }\n\n      this._getBounds(aX, aY, onlyWidthHeight);\n    },\n\n    /**\n     * @private\n     */\n    _getBounds: function _getBounds(aX, aY, onlyWidthHeight) {\n      var minXY = new fabric.Point(min(aX), min(aY)),\n          maxXY = new fabric.Point(max(aX), max(aY)),\n          top = minXY.y || 0,\n          left = minXY.x || 0,\n          width = maxXY.x - minXY.x || 0,\n          height = maxXY.y - minXY.y || 0;\n      this.width = width;\n      this.height = height;\n\n      if (!onlyWidthHeight) {\n        // the bounding box always finds the topleft most corner.\n        // whatever is the group origin, we set up here the left/top position.\n        this.setPositionByOrigin({\n          x: left,\n          y: top\n        }, 'left', 'top');\n      }\n    }\n  });\n  /**\n   * Returns {@link fabric.Group} instance from an object representation\n   * @static\n   * @memberOf fabric.Group\n   * @param {Object} object Object to create a group from\n   * @param {Function} [callback] Callback to invoke when an group instance is created\n   */\n\n  fabric.Group.fromObject = function (object, callback) {\n    var objects = object.objects,\n        options = fabric.util.object.clone(object, true);\n    delete options.objects;\n\n    if (typeof objects === 'string') {\n      // it has to be an url or something went wrong.\n      fabric.loadSVGFromURL(objects, function (elements) {\n        var group = fabric.util.groupSVGElements(elements, object, objects);\n        group.set(options);\n        callback && callback(group);\n      });\n      return;\n    }\n\n    fabric.util.enlivenObjects(objects, function (enlivenedObjects) {\n      fabric.util.enlivenObjects([object.clipPath], function (enlivedClipPath) {\n        var options = fabric.util.object.clone(object, true);\n        options.clipPath = enlivedClipPath[0];\n        delete options.objects;\n        callback && callback(new fabric.Group(enlivenedObjects, options, true));\n      });\n    });\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {});\n\n  if (fabric.ActiveSelection) {\n    return;\n  }\n  /**\n   * Group class\n   * @class fabric.ActiveSelection\n   * @extends fabric.Group\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-3#groups}\n   * @see {@link fabric.ActiveSelection#initialize} for constructor definition\n   */\n\n\n  fabric.ActiveSelection = fabric.util.createClass(fabric.Group,\n  /** @lends fabric.ActiveSelection.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'activeSelection',\n\n    /**\n     * Constructor\n     * @param {Object} objects ActiveSelection objects\n     * @param {Object} [options] Options object\n     * @return {Object} thisArg\n     */\n    initialize: function initialize(objects, options) {\n      options = options || {};\n      this._objects = objects || [];\n\n      for (var i = this._objects.length; i--;) {\n        this._objects[i].group = this;\n      }\n\n      if (options.originX) {\n        this.originX = options.originX;\n      }\n\n      if (options.originY) {\n        this.originY = options.originY;\n      }\n\n      this._calcBounds();\n\n      this._updateObjectsCoords();\n\n      fabric.Object.prototype.initialize.call(this, options);\n      this.setCoords();\n    },\n\n    /**\n     * Change te activeSelection to a normal group,\n     * High level function that automatically adds it to canvas as\n     * active object. no events fired.\n     * @since 2.0.0\n     * @return {fabric.Group}\n     */\n    toGroup: function toGroup() {\n      var objects = this._objects.concat();\n\n      this._objects = [];\n      var options = fabric.Object.prototype.toObject.call(this);\n      var newGroup = new fabric.Group([]);\n      delete options.type;\n      newGroup.set(options);\n      objects.forEach(function (object) {\n        object.canvas.remove(object);\n        object.group = newGroup;\n      });\n      newGroup._objects = objects;\n\n      if (!this.canvas) {\n        return newGroup;\n      }\n\n      var canvas = this.canvas;\n      canvas.add(newGroup);\n      canvas._activeObject = newGroup;\n      newGroup.setCoords();\n      return newGroup;\n    },\n\n    /**\n     * If returns true, deselection is cancelled.\n     * @since 2.0.0\n     * @return {Boolean} [cancel]\n     */\n    onDeselect: function onDeselect() {\n      this.destroy();\n      return false;\n    },\n\n    /**\n     * Returns string representation of a group\n     * @return {String}\n     */\n    toString: function toString() {\n      return '#<fabric.ActiveSelection: (' + this.complexity() + ')>';\n    },\n\n    /**\n     * Decide if the object should cache or not. Create its own cache level\n     * objectCaching is a global flag, wins over everything\n     * needsItsOwnCache should be used when the object drawing method requires\n     * a cache step. None of the fabric classes requires it.\n     * Generally you do not cache objects in groups because the group outside is cached.\n     * @return {Boolean}\n     */\n    shouldCache: function shouldCache() {\n      return false;\n    },\n\n    /**\n     * Check if this group or its parent group are caching, recursively up\n     * @return {Boolean}\n     */\n    isOnACache: function isOnACache() {\n      return false;\n    },\n\n    /**\n     * Renders controls and borders for the object\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Object} [styleOverride] properties to override the object style\n     * @param {Object} [childrenOverride] properties to override the children overrides\n     */\n    _renderControls: function _renderControls(ctx, styleOverride, childrenOverride) {\n      ctx.save();\n      ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;\n      this.callSuper('_renderControls', ctx, styleOverride);\n      childrenOverride = childrenOverride || {};\n\n      if (typeof childrenOverride.hasControls === 'undefined') {\n        childrenOverride.hasControls = false;\n      }\n\n      if (typeof childrenOverride.hasRotatingPoint === 'undefined') {\n        childrenOverride.hasRotatingPoint = false;\n      }\n\n      childrenOverride.forActiveSelection = true;\n\n      for (var i = 0, len = this._objects.length; i < len; i++) {\n        this._objects[i]._renderControls(ctx, childrenOverride);\n      }\n\n      ctx.restore();\n    }\n  });\n  /**\n   * Returns {@link fabric.ActiveSelection} instance from an object representation\n   * @static\n   * @memberOf fabric.ActiveSelection\n   * @param {Object} object Object to create a group from\n   * @param {Function} [callback] Callback to invoke when an ActiveSelection instance is created\n   */\n\n  fabric.ActiveSelection.fromObject = function (object, callback) {\n    fabric.util.enlivenObjects(object.objects, function (enlivenedObjects) {\n      delete object.objects;\n      callback && callback(new fabric.ActiveSelection(enlivenedObjects, object, true));\n    });\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function (global) {\n  'use strict';\n\n  var extend = fabric.util.object.extend;\n\n  if (!global.fabric) {\n    global.fabric = {};\n  }\n\n  if (global.fabric.Image) {\n    fabric.warn('fabric.Image is already defined.');\n    return;\n  }\n  /**\n   * Image class\n   * @class fabric.Image\n   * @extends fabric.Object\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-1#images}\n   * @see {@link fabric.Image#initialize} for constructor definition\n   */\n\n\n  fabric.Image = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Image.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'image',\n\n    /**\n     * crossOrigin value (one of \"\", \"anonymous\", \"use-credentials\")\n     * @see https://developer.mozilla.org/en-US/docs/HTML/CORS_settings_attributes\n     * @type String\n     * @default\n     */\n    crossOrigin: '',\n\n    /**\n     * Width of a stroke.\n     * For image quality a stroke multiple of 2 gives better results.\n     * @type Number\n     * @default\n     */\n    strokeWidth: 0,\n\n    /**\n     * When calling {@link fabric.Image.getSrc}, return value from element src with `element.getAttribute('src')`.\n     * This allows for relative urls as image src.\n     * @since 2.7.0\n     * @type Boolean\n     * @default\n     */\n    srcFromAttribute: false,\n\n    /**\n     * private\n     * contains last value of scaleX to detect\n     * if the Image got resized after the last Render\n     * @type Number\n     */\n    _lastScaleX: 1,\n\n    /**\n     * private\n     * contains last value of scaleY to detect\n     * if the Image got resized after the last Render\n     * @type Number\n     */\n    _lastScaleY: 1,\n\n    /**\n     * private\n     * contains last value of scaling applied by the apply filter chain\n     * @type Number\n     */\n    _filterScalingX: 1,\n\n    /**\n     * private\n     * contains last value of scaling applied by the apply filter chain\n     * @type Number\n     */\n    _filterScalingY: 1,\n\n    /**\n     * minimum scale factor under which any resizeFilter is triggered to resize the image\n     * 0 will disable the automatic resize. 1 will trigger automatically always.\n     * number bigger than 1 are not implemented yet.\n     * @type Number\n     */\n    minimumScaleTrigger: 0.5,\n\n    /**\n     * List of properties to consider when checking if\n     * state of an object is changed ({@link fabric.Object#hasStateChanged})\n     * as well as for history (undo/redo) purposes\n     * @type Array\n     */\n    stateProperties: fabric.Object.prototype.stateProperties.concat('cropX', 'cropY'),\n\n    /**\n     * key used to retrieve the texture representing this image\n     * @since 2.0.0\n     * @type String\n     * @default\n     */\n    cacheKey: '',\n\n    /**\n     * Image crop in pixels from original image size.\n     * @since 2.0.0\n     * @type Number\n     * @default\n     */\n    cropX: 0,\n\n    /**\n     * Image crop in pixels from original image size.\n     * @since 2.0.0\n     * @type Number\n     * @default\n     */\n    cropY: 0,\n\n    /**\n     * Constructor\n     * @param {HTMLImageElement | String} element Image element\n     * @param {Object} [options] Options object\n     * @param {function} [callback] callback function to call after eventual filters applied.\n     * @return {fabric.Image} thisArg\n     */\n    initialize: function initialize(element, options) {\n      options || (options = {});\n      this.filters = [];\n      this.cacheKey = 'texture' + fabric.Object.__uid++;\n      this.callSuper('initialize', options);\n\n      this._initElement(element, options);\n    },\n\n    /**\n     * Returns image element which this instance if based on\n     * @return {HTMLImageElement} Image element\n     */\n    getElement: function getElement() {\n      return this._element || {};\n    },\n\n    /**\n     * Sets image element for this instance to a specified one.\n     * If filters defined they are applied to new image.\n     * You might need to call `canvas.renderAll` and `object.setCoords` after replacing, to render new image and update controls area.\n     * @param {HTMLImageElement} element\n     * @param {Object} [options] Options object\n     * @return {fabric.Image} thisArg\n     * @chainable\n     */\n    setElement: function setElement(element, options) {\n      this.removeTexture(this.cacheKey);\n      this.removeTexture(this.cacheKey + '_filtered');\n      this._element = element;\n      this._originalElement = element;\n\n      this._initConfig(options);\n\n      if (this.filters.length !== 0) {\n        this.applyFilters();\n      } // resizeFilters work on the already filtered copy.\n      // we need to apply resizeFilters AFTER normal filters.\n      // applyResizeFilters is run more often than normal fiters\n      // and is triggered by user interactions rather than dev code\n\n\n      if (this.resizeFilter) {\n        this.applyResizeFilters();\n      }\n\n      return this;\n    },\n\n    /**\n     * Delete a single texture if in webgl mode\n     */\n    removeTexture: function removeTexture(key) {\n      var backend = fabric.filterBackend;\n\n      if (backend && backend.evictCachesForKey) {\n        backend.evictCachesForKey(key);\n      }\n    },\n\n    /**\n     * Delete textures, reference to elements and eventually JSDOM cleanup\n     */\n    dispose: function dispose() {\n      this.removeTexture(this.cacheKey);\n      this.removeTexture(this.cacheKey + '_filtered');\n      this._cacheContext = undefined;\n      ['_originalElement', '_element', '_filteredEl', '_cacheCanvas'].forEach(function (element) {\n        fabric.util.cleanUpJsdomNode(this[element]);\n        this[element] = undefined;\n      }.bind(this));\n    },\n\n    /**\n     * Sets crossOrigin value (on an instance and corresponding image element)\n     * @return {fabric.Image} thisArg\n     * @chainable\n     */\n    setCrossOrigin: function setCrossOrigin(value) {\n      this.crossOrigin = value;\n      this._element.crossOrigin = value;\n      return this;\n    },\n\n    /**\n     * Returns original size of an image\n     * @return {Object} Object with \"width\" and \"height\" properties\n     */\n    getOriginalSize: function getOriginalSize() {\n      var element = this.getElement();\n      return {\n        width: element.naturalWidth || element.width,\n        height: element.naturalHeight || element.height\n      };\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _stroke: function _stroke(ctx) {\n      if (!this.stroke || this.strokeWidth === 0) {\n        return;\n      }\n\n      var w = this.width / 2,\n          h = this.height / 2;\n      ctx.beginPath();\n      ctx.moveTo(-w, -h);\n      ctx.lineTo(w, -h);\n      ctx.lineTo(w, h);\n      ctx.lineTo(-w, h);\n      ctx.lineTo(-w, -h);\n      ctx.closePath();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderDashedStroke: function _renderDashedStroke(ctx) {\n      var x = -this.width / 2,\n          y = -this.height / 2,\n          w = this.width,\n          h = this.height;\n      ctx.save();\n\n      this._setStrokeStyles(ctx, this);\n\n      ctx.beginPath();\n      fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray);\n      fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray);\n      ctx.closePath();\n      ctx.restore();\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} Object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      var filters = [];\n      this.filters.forEach(function (filterObj) {\n        if (filterObj) {\n          filters.push(filterObj.toObject());\n        }\n      });\n      var object = extend(this.callSuper('toObject', ['crossOrigin', 'cropX', 'cropY'].concat(propertiesToInclude)), {\n        src: this.getSrc(),\n        filters: filters\n      });\n\n      if (this.resizeFilter) {\n        object.resizeFilter = this.resizeFilter.toObject();\n      }\n\n      return object;\n    },\n\n    /**\n     * Returns true if an image has crop applied, inspecting values of cropX,cropY,width,hight.\n     * @return {Boolean}\n     */\n    hasCrop: function hasCrop() {\n      return this.cropX || this.cropY || this.width < this._element.width || this.height < this._element.height;\n    },\n\n    /**\n     * Returns source of an image\n     * @param {Boolean} filtered indicates if the src is needed for svg\n     * @return {String} Source of an image\n     */\n    getSrc: function getSrc(filtered) {\n      var element = filtered ? this._element : this._originalElement;\n\n      if (element) {\n        if (element.toDataURL) {\n          return element.toDataURL();\n        }\n\n        if (this.srcFromAttribute) {\n          return element.getAttribute('src');\n        } else {\n          return element.src;\n        }\n      } else {\n        return this.src || '';\n      }\n    },\n\n    /**\n     * Sets source of an image\n     * @param {String} src Source string (URL)\n     * @param {Function} [callback] Callback is invoked when image has been loaded (and all filters have been applied)\n     * @param {Object} [options] Options object\n     * @return {fabric.Image} thisArg\n     * @chainable\n     */\n    setSrc: function setSrc(src, callback, options) {\n      fabric.util.loadImage(src, function (img) {\n        this.setElement(img, options);\n\n        this._setWidthHeight();\n\n        callback && callback(this);\n      }, this, options && options.crossOrigin);\n      return this;\n    },\n\n    /**\n     * Returns string representation of an instance\n     * @return {String} String representation of an instance\n     */\n    toString: function toString() {\n      return '#<fabric.Image: { src: \"' + this.getSrc() + '\" }>';\n    },\n    applyResizeFilters: function applyResizeFilters() {\n      var filter = this.resizeFilter,\n          minimumScale = this.minimumScaleTrigger,\n          objectScale = this.getTotalObjectScaling(),\n          scaleX = objectScale.scaleX,\n          scaleY = objectScale.scaleY,\n          elementToFilter = this._filteredEl || this._originalElement;\n\n      if (this.group) {\n        this.set('dirty', true);\n      }\n\n      if (!filter || scaleX > minimumScale && scaleY > minimumScale) {\n        this._element = elementToFilter;\n        this._filterScalingX = 1;\n        this._filterScalingY = 1;\n        this._lastScaleX = scaleX;\n        this._lastScaleY = scaleY;\n        return;\n      }\n\n      if (!fabric.filterBackend) {\n        fabric.filterBackend = fabric.initFilterBackend();\n      }\n\n      var canvasEl = fabric.util.createCanvasElement(),\n          cacheKey = this._filteredEl ? this.cacheKey + '_filtered' : this.cacheKey,\n          sourceWidth = elementToFilter.width,\n          sourceHeight = elementToFilter.height;\n      canvasEl.width = sourceWidth;\n      canvasEl.height = sourceHeight;\n      this._element = canvasEl;\n      this._lastScaleX = filter.scaleX = scaleX;\n      this._lastScaleY = filter.scaleY = scaleY;\n      fabric.filterBackend.applyFilters([filter], elementToFilter, sourceWidth, sourceHeight, this._element, cacheKey);\n      this._filterScalingX = canvasEl.width / this._originalElement.width;\n      this._filterScalingY = canvasEl.height / this._originalElement.height;\n    },\n\n    /**\n     * Applies filters assigned to this image (from \"filters\" array) or from filter param\n     * @method applyFilters\n     * @param {Array} filters to be applied\n     * @param {Boolean} forResizing specify if the filter operation is a resize operation\n     * @return {thisArg} return the fabric.Image object\n     * @chainable\n     */\n    applyFilters: function applyFilters(filters) {\n      filters = filters || this.filters || [];\n      filters = filters.filter(function (filter) {\n        return filter && !filter.isNeutralState();\n      });\n      this.set('dirty', true); // needs to clear out or WEBGL will not resize correctly\n\n      this.removeTexture(this.cacheKey + '_filtered');\n\n      if (filters.length === 0) {\n        this._element = this._originalElement;\n        this._filteredEl = null;\n        this._filterScalingX = 1;\n        this._filterScalingY = 1;\n        return this;\n      }\n\n      var imgElement = this._originalElement,\n          sourceWidth = imgElement.naturalWidth || imgElement.width,\n          sourceHeight = imgElement.naturalHeight || imgElement.height;\n\n      if (this._element === this._originalElement) {\n        // if the element is the same we need to create a new element\n        var canvasEl = fabric.util.createCanvasElement();\n        canvasEl.width = sourceWidth;\n        canvasEl.height = sourceHeight;\n        this._element = canvasEl;\n        this._filteredEl = canvasEl;\n      } else {\n        // clear the existing element to get new filter data\n        // also dereference the eventual resized _element\n        this._element = this._filteredEl;\n\n        this._filteredEl.getContext('2d').clearRect(0, 0, sourceWidth, sourceHeight); // we also need to resize again at next renderAll, so remove saved _lastScaleX/Y\n\n\n        this._lastScaleX = 1;\n        this._lastScaleY = 1;\n      }\n\n      if (!fabric.filterBackend) {\n        fabric.filterBackend = fabric.initFilterBackend();\n      }\n\n      fabric.filterBackend.applyFilters(filters, this._originalElement, sourceWidth, sourceHeight, this._element, this.cacheKey);\n\n      if (this._originalElement.width !== this._element.width || this._originalElement.height !== this._element.height) {\n        this._filterScalingX = this._element.width / this._originalElement.width;\n        this._filterScalingY = this._element.height / this._originalElement.height;\n      }\n\n      return this;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      if (this.isMoving !== true && this.resizeFilter && this._needsResize()) {\n        this.applyResizeFilters();\n      }\n\n      this._stroke(ctx);\n\n      this._renderPaintInOrder(ctx);\n    },\n\n    /**\n     * Decide if the object should cache or not. Create its own cache level\n     * needsItsOwnCache should be used when the object drawing method requires\n     * a cache step. None of the fabric classes requires it.\n     * Generally you do not cache objects in groups because the group outside is cached.\n     * This is the special image version where we would like to avoid caching where possible.\n     * Essentially images do not benefit from caching. They may require caching, and in that\n     * case we do it. Also caching an image usually ends in a loss of details.\n     * A full performance audit should be done.\n     * @return {Boolean}\n     */\n    shouldCache: function shouldCache() {\n      return this.needsItsOwnCache();\n    },\n    _renderFill: function _renderFill(ctx) {\n      var elementToDraw = this._element,\n          w = this.width,\n          h = this.height,\n          sW = Math.min(elementToDraw.naturalWidth || elementToDraw.width, w * this._filterScalingX),\n          sH = Math.min(elementToDraw.naturalHeight || elementToDraw.height, h * this._filterScalingY),\n          x = -w / 2,\n          y = -h / 2,\n          sX = Math.max(0, this.cropX * this._filterScalingX),\n          sY = Math.max(0, this.cropY * this._filterScalingY);\n      elementToDraw && ctx.drawImage(elementToDraw, sX, sY, sW, sH, x, y, w, h);\n    },\n\n    /**\n     * needed to check if image needs resize\n     * @private\n     */\n    _needsResize: function _needsResize() {\n      var scale = this.getTotalObjectScaling();\n      return scale.scaleX !== this._lastScaleX || scale.scaleY !== this._lastScaleY;\n    },\n\n    /**\n     * @private\n     */\n    _resetWidthHeight: function _resetWidthHeight() {\n      this.set(this.getOriginalSize());\n    },\n\n    /**\n     * The Image class's initialization method. This method is automatically\n     * called by the constructor.\n     * @private\n     * @param {HTMLImageElement|String} element The element representing the image\n     * @param {Object} [options] Options object\n     */\n    _initElement: function _initElement(element, options) {\n      this.setElement(fabric.util.getById(element), options);\n      fabric.util.addClass(this.getElement(), fabric.Image.CSS_CANVAS);\n    },\n\n    /**\n     * @private\n     * @param {Object} [options] Options object\n     */\n    _initConfig: function _initConfig(options) {\n      options || (options = {});\n      this.setOptions(options);\n\n      this._setWidthHeight(options);\n\n      if (this._element && this.crossOrigin) {\n        this._element.crossOrigin = this.crossOrigin;\n      }\n    },\n\n    /**\n     * @private\n     * @param {Array} filters to be initialized\n     * @param {Function} callback Callback to invoke when all fabric.Image.filters instances are created\n     */\n    _initFilters: function _initFilters(filters, callback) {\n      if (filters && filters.length) {\n        fabric.util.enlivenObjects(filters, function (enlivenedObjects) {\n          callback && callback(enlivenedObjects);\n        }, 'fabric.Image.filters');\n      } else {\n        callback && callback();\n      }\n    },\n\n    /**\n     * @private\n     * Set the width and the height of the image object, using the element or the\n     * options.\n     * @param {Object} [options] Object with width/height properties\n     */\n    _setWidthHeight: function _setWidthHeight(options) {\n      options || (options = {});\n      var el = this.getElement();\n      this.width = options.width || el.naturalWidth || el.width || 0;\n      this.height = options.height || el.naturalHeight || el.height || 0;\n    },\n\n    /**\n     * Calculate offset for center and scale factor for the image in order to respect\n     * the preserveAspectRatio attribute\n     * @private\n     * @return {Object}\n     */\n    parsePreserveAspectRatioAttribute: function parsePreserveAspectRatioAttribute() {\n      var pAR = fabric.util.parsePreserveAspectRatioAttribute(this.preserveAspectRatio || ''),\n          rWidth = this._element.width,\n          rHeight = this._element.height,\n          scaleX = 1,\n          scaleY = 1,\n          offsetLeft = 0,\n          offsetTop = 0,\n          cropX = 0,\n          cropY = 0,\n          offset,\n          pWidth = this.width,\n          pHeight = this.height,\n          parsedAttributes = {\n        width: pWidth,\n        height: pHeight\n      };\n\n      if (pAR && (pAR.alignX !== 'none' || pAR.alignY !== 'none')) {\n        if (pAR.meetOrSlice === 'meet') {\n          scaleX = scaleY = fabric.util.findScaleToFit(this._element, parsedAttributes);\n          offset = (pWidth - rWidth * scaleX) / 2;\n\n          if (pAR.alignX === 'Min') {\n            offsetLeft = -offset;\n          }\n\n          if (pAR.alignX === 'Max') {\n            offsetLeft = offset;\n          }\n\n          offset = (pHeight - rHeight * scaleY) / 2;\n\n          if (pAR.alignY === 'Min') {\n            offsetTop = -offset;\n          }\n\n          if (pAR.alignY === 'Max') {\n            offsetTop = offset;\n          }\n        }\n\n        if (pAR.meetOrSlice === 'slice') {\n          scaleX = scaleY = fabric.util.findScaleToCover(this._element, parsedAttributes);\n          offset = rWidth - pWidth / scaleX;\n\n          if (pAR.alignX === 'Mid') {\n            cropX = offset / 2;\n          }\n\n          if (pAR.alignX === 'Max') {\n            cropX = offset;\n          }\n\n          offset = rHeight - pHeight / scaleY;\n\n          if (pAR.alignY === 'Mid') {\n            cropY = offset / 2;\n          }\n\n          if (pAR.alignY === 'Max') {\n            cropY = offset;\n          }\n\n          rWidth = pWidth / scaleX;\n          rHeight = pHeight / scaleY;\n        }\n      } else {\n        scaleX = pWidth / rWidth;\n        scaleY = pHeight / rHeight;\n      }\n\n      return {\n        width: rWidth,\n        height: rHeight,\n        scaleX: scaleX,\n        scaleY: scaleY,\n        offsetLeft: offsetLeft,\n        offsetTop: offsetTop,\n        cropX: cropX,\n        cropY: cropY\n      };\n    }\n  });\n  /**\n   * Default CSS class name for canvas\n   * @static\n   * @type String\n   * @default\n   */\n\n  fabric.Image.CSS_CANVAS = 'canvas-img';\n  /**\n   * Alias for getSrc\n   * @static\n   */\n\n  fabric.Image.prototype.getSvgSrc = fabric.Image.prototype.getSrc;\n  /**\n   * Creates an instance of fabric.Image from its object representation\n   * @static\n   * @param {Object} object Object to create an instance from\n   * @param {Function} callback Callback to invoke when an image instance is created\n   */\n\n  fabric.Image.fromObject = function (_object, callback) {\n    var object = fabric.util.object.clone(_object);\n    fabric.util.loadImage(object.src, function (img, error) {\n      if (error) {\n        callback && callback(null, error);\n        return;\n      }\n\n      fabric.Image.prototype._initFilters.call(object, object.filters, function (filters) {\n        object.filters = filters || [];\n\n        fabric.Image.prototype._initFilters.call(object, [object.resizeFilter], function (resizeFilters) {\n          object.resizeFilter = resizeFilters[0];\n          fabric.util.enlivenObjects([object.clipPath], function (enlivedProps) {\n            object.clipPath = enlivedProps[0];\n            var image = new fabric.Image(img, object);\n            callback(image);\n          });\n        });\n      });\n    }, null, object.crossOrigin);\n  };\n  /**\n   * Creates an instance of fabric.Image from an URL string\n   * @static\n   * @param {String} url URL to create an image from\n   * @param {Function} [callback] Callback to invoke when image is created (newly created image is passed as a first argument)\n   * @param {Object} [imgOptions] Options object\n   */\n\n\n  fabric.Image.fromURL = function (url, callback, imgOptions) {\n    fabric.util.loadImage(url, function (img) {\n      callback && callback(new fabric.Image(img, imgOptions));\n    }, null, imgOptions && imgOptions.crossOrigin);\n  };\n})(typeof exports !== 'undefined' ? exports : this);\n\nfabric.util.object.extend(fabric.Object.prototype,\n/** @lends fabric.Object.prototype */\n{\n  /**\n   * @private\n   * @return {Number} angle value\n   */\n  _getAngleValueForStraighten: function _getAngleValueForStraighten() {\n    var angle = this.angle % 360;\n\n    if (angle > 0) {\n      return Math.round((angle - 1) / 90) * 90;\n    }\n\n    return Math.round(angle / 90) * 90;\n  },\n\n  /**\n   * Straightens an object (rotating it from current angle to one of 0, 90, 180, 270, etc. depending on which is closer)\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  straighten: function straighten() {\n    this.rotate(this._getAngleValueForStraighten());\n    return this;\n  },\n\n  /**\n   * Same as {@link fabric.Object.prototype.straighten} but with animation\n   * @param {Object} callbacks Object with callback functions\n   * @param {Function} [callbacks.onComplete] Invoked on completion\n   * @param {Function} [callbacks.onChange] Invoked on every step of animation\n   * @return {fabric.Object} thisArg\n   * @chainable\n   */\n  fxStraighten: function fxStraighten(callbacks) {\n    callbacks = callbacks || {};\n\n    var empty = function empty() {},\n        _onComplete4 = callbacks.onComplete || empty,\n        _onChange4 = callbacks.onChange || empty,\n        _this = this;\n\n    fabric.util.animate({\n      startValue: this.get('angle'),\n      endValue: this._getAngleValueForStraighten(),\n      duration: this.FX_DURATION,\n      onChange: function onChange(value) {\n        _this.rotate(value);\n\n        _onChange4();\n      },\n      onComplete: function onComplete() {\n        _this.setCoords();\n\n        _onComplete4();\n      }\n    });\n    return this;\n  }\n});\nfabric.util.object.extend(fabric.StaticCanvas.prototype,\n/** @lends fabric.StaticCanvas.prototype */\n{\n  /**\n   * Straightens object, then rerenders canvas\n   * @param {fabric.Object} object Object to straighten\n   * @return {fabric.Canvas} thisArg\n   * @chainable\n   */\n  straightenObject: function straightenObject(object) {\n    object.straighten();\n    this.requestRenderAll();\n    return this;\n  },\n\n  /**\n   * Same as {@link fabric.Canvas.prototype.straightenObject}, but animated\n   * @param {fabric.Object} object Object to straighten\n   * @return {fabric.Canvas} thisArg\n   * @chainable\n   */\n  fxStraightenObject: function fxStraightenObject(object) {\n    object.fxStraighten({\n      onChange: this.requestRenderAllBound\n    });\n    return this;\n  }\n});\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {}),\n      clone = fabric.util.object.clone;\n\n  if (fabric.Text) {\n    fabric.warn('fabric.Text is already defined');\n    return;\n  }\n  /**\n   * Text class\n   * @class fabric.Text\n   * @extends fabric.Object\n   * @return {fabric.Text} thisArg\n   * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#text}\n   * @see {@link fabric.Text#initialize} for constructor definition\n   */\n\n\n  fabric.Text = fabric.util.createClass(fabric.Object,\n  /** @lends fabric.Text.prototype */\n  {\n    /**\n     * Properties which when set cause object to change dimensions\n     * @type Array\n     * @private\n     */\n    _dimensionAffectingProps: ['fontSize', 'fontWeight', 'fontFamily', 'fontStyle', 'lineHeight', 'text', 'charSpacing', 'textAlign', 'styles'],\n\n    /**\n     * @private\n     */\n    _reNewline: /\\r?\\n/,\n\n    /**\n     * Use this regular expression to filter for whitespaces that is not a new line.\n     * Mostly used when text is 'justify' aligned.\n     * @private\n     */\n    _reSpacesAndTabs: /[ \\t\\r]/g,\n\n    /**\n     * Use this regular expression to filter for whitespace that is not a new line.\n     * Mostly used when text is 'justify' aligned.\n     * @private\n     */\n    _reSpaceAndTab: /[ \\t\\r]/,\n\n    /**\n     * Use this regular expression to filter consecutive groups of non spaces.\n     * Mostly used when text is 'justify' aligned.\n     * @private\n     */\n    _reWords: /\\S+/g,\n\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'text',\n\n    /**\n     * Font size (in pixels)\n     * @type Number\n     * @default\n     */\n    fontSize: 40,\n\n    /**\n     * Font weight (e.g. bold, normal, 400, 600, 800)\n     * @type {(Number|String)}\n     * @default\n     */\n    fontWeight: 'normal',\n\n    /**\n     * Font family\n     * @type String\n     * @default\n     */\n    fontFamily: 'Times New Roman',\n\n    /**\n     * Text decoration underline.\n     * @type Boolean\n     * @default\n     */\n    underline: false,\n\n    /**\n     * Text decoration overline.\n     * @type Boolean\n     * @default\n     */\n    overline: false,\n\n    /**\n     * Text decoration linethrough.\n     * @type Boolean\n     * @default\n     */\n    linethrough: false,\n\n    /**\n     * Text alignment. Possible values: \"left\", \"center\", \"right\", \"justify\",\n     * \"justify-left\", \"justify-center\" or \"justify-right\".\n     * @type String\n     * @default\n     */\n    textAlign: 'left',\n\n    /**\n     * Font style . Possible values: \"\", \"normal\", \"italic\" or \"oblique\".\n     * @type String\n     * @default\n     */\n    fontStyle: 'normal',\n\n    /**\n     * Line height\n     * @type Number\n     * @default\n     */\n    lineHeight: 1.16,\n\n    /**\n     * Superscript schema object (minimum overlap)\n     * @type {Object}\n     * @default\n     */\n    superscript: {\n      size: 0.60,\n      // fontSize factor\n      baseline: -0.35 // baseline-shift factor (upwards)\n\n    },\n\n    /**\n     * Subscript schema object (minimum overlap)\n     * @type {Object}\n     * @default\n     */\n    subscript: {\n      size: 0.60,\n      // fontSize factor\n      baseline: 0.11 // baseline-shift factor (downwards)\n\n    },\n\n    /**\n     * Background color of text lines\n     * @type String\n     * @default\n     */\n    textBackgroundColor: '',\n\n    /**\n     * List of properties to consider when checking if\n     * state of an object is changed ({@link fabric.Object#hasStateChanged})\n     * as well as for history (undo/redo) purposes\n     * @type Array\n     */\n    stateProperties: fabric.Object.prototype.stateProperties.concat('fontFamily', 'fontWeight', 'fontSize', 'text', 'underline', 'overline', 'linethrough', 'textAlign', 'fontStyle', 'lineHeight', 'textBackgroundColor', 'charSpacing', 'styles'),\n\n    /**\n     * List of properties to consider when checking if cache needs refresh\n     * @type Array\n     */\n    cacheProperties: fabric.Object.prototype.cacheProperties.concat('fontFamily', 'fontWeight', 'fontSize', 'text', 'underline', 'overline', 'linethrough', 'textAlign', 'fontStyle', 'lineHeight', 'textBackgroundColor', 'charSpacing', 'styles'),\n\n    /**\n     * When defined, an object is rendered via stroke and this property specifies its color.\n     * <b>Backwards incompatibility note:</b> This property was named \"strokeStyle\" until v1.1.6\n     * @type String\n     * @default\n     */\n    stroke: null,\n\n    /**\n     * Shadow object representing shadow of this shape.\n     * <b>Backwards incompatibility note:</b> This property was named \"textShadow\" (String) until v1.2.11\n     * @type fabric.Shadow\n     * @default\n     */\n    shadow: null,\n\n    /**\n     * @private\n     */\n    _fontSizeFraction: 0.222,\n\n    /**\n     * @private\n     */\n    offsets: {\n      underline: 0.10,\n      linethrough: -0.315,\n      overline: -0.88\n    },\n\n    /**\n     * Text Line proportion to font Size (in pixels)\n     * @type Number\n     * @default\n     */\n    _fontSizeMult: 1.13,\n\n    /**\n     * additional space between characters\n     * expressed in thousands of em unit\n     * @type Number\n     * @default\n     */\n    charSpacing: 0,\n\n    /**\n     * Object containing character styles - top-level properties -> line numbers,\n     * 2nd-level properties - charater numbers\n     * @type Object\n     * @default\n     */\n    styles: null,\n\n    /**\n     * Reference to a context to measure text char or couple of chars\n     * the cacheContext of the canvas will be used or a freshly created one if the object is not on canvas\n     * once created it will be referenced on fabric._measuringContext to avoide creating a canvas for every\n     * text object created.\n     * @type {CanvasRenderingContext2D}\n     * @default\n     */\n    _measuringContext: null,\n\n    /**\n     * Baseline shift, stlyes only, keep at 0 for the main text object\n     * @type {Number}\n     * @default\n     */\n    deltaY: 0,\n\n    /**\n     * Array of properties that define a style unit (of 'styles').\n     * @type {Array}\n     * @default\n     */\n    _styleProperties: ['stroke', 'strokeWidth', 'fill', 'fontFamily', 'fontSize', 'fontWeight', 'fontStyle', 'underline', 'overline', 'linethrough', 'deltaY', 'textBackgroundColor'],\n\n    /**\n     * contains characters bounding boxes\n     */\n    __charBounds: [],\n\n    /**\n     * use this size when measuring text. To avoid IE11 rounding errors\n     * @type {Number}\n     * @default\n     * @readonly\n     * @private\n     */\n    CACHE_FONT_SIZE: 400,\n\n    /**\n     * contains the min text width to avoid getting 0\n     * @type {Number}\n     * @default\n     */\n    MIN_TEXT_WIDTH: 2,\n\n    /**\n     * Constructor\n     * @param {String} text Text string\n     * @param {Object} [options] Options object\n     * @return {fabric.Text} thisArg\n     */\n    initialize: function initialize(text, options) {\n      this.styles = options ? options.styles || {} : {};\n      this.text = text;\n      this.__skipDimension = true;\n      this.callSuper('initialize', options);\n      this.__skipDimension = false;\n      this.initDimensions();\n      this.setCoords();\n      this.setupState({\n        propertySet: '_dimensionAffectingProps'\n      });\n    },\n\n    /**\n     * Return a contex for measurement of text string.\n     * if created it gets stored for reuse\n     * @param {String} text Text string\n     * @param {Object} [options] Options object\n     * @return {fabric.Text} thisArg\n     */\n    getMeasuringContext: function getMeasuringContext() {\n      // if we did not return we have to measure something.\n      if (!fabric._measuringContext) {\n        fabric._measuringContext = this.canvas && this.canvas.contextCache || fabric.util.createCanvasElement().getContext('2d');\n      }\n\n      return fabric._measuringContext;\n    },\n\n    /**\n     * @private\n     * Divides text into lines of text and lines of graphemes.\n     */\n    _splitText: function _splitText() {\n      var newLines = this._splitTextIntoLines(this.text);\n\n      this.textLines = newLines.lines;\n      this._textLines = newLines.graphemeLines;\n      this._unwrappedTextLines = newLines._unwrappedLines;\n      this._text = newLines.graphemeText;\n      return newLines;\n    },\n\n    /**\n     * Initialize or update text dimensions.\n     * Updates this.width and this.height with the proper values.\n     * Does not return dimensions.\n     */\n    initDimensions: function initDimensions() {\n      if (this.__skipDimension) {\n        return;\n      }\n\n      this._splitText();\n\n      this._clearCache();\n\n      this.width = this.calcTextWidth() || this.cursorWidth || this.MIN_TEXT_WIDTH;\n\n      if (this.textAlign.indexOf('justify') !== -1) {\n        // once text is measured we need to make space fatter to make justified text.\n        this.enlargeSpaces();\n      }\n\n      this.height = this.calcTextHeight();\n      this.saveState({\n        propertySet: '_dimensionAffectingProps'\n      });\n    },\n\n    /**\n     * Enlarge space boxes and shift the others\n     */\n    enlargeSpaces: function enlargeSpaces() {\n      var diffSpace, currentLineWidth, numberOfSpaces, accumulatedSpace, line, charBound, spaces;\n\n      for (var i = 0, len = this._textLines.length; i < len; i++) {\n        if (this.textAlign !== 'justify' && (i === len - 1 || this.isEndOfWrapping(i))) {\n          continue;\n        }\n\n        accumulatedSpace = 0;\n        line = this._textLines[i];\n        currentLineWidth = this.getLineWidth(i);\n\n        if (currentLineWidth < this.width && (spaces = this.textLines[i].match(this._reSpacesAndTabs))) {\n          numberOfSpaces = spaces.length;\n          diffSpace = (this.width - currentLineWidth) / numberOfSpaces;\n\n          for (var j = 0, jlen = line.length; j <= jlen; j++) {\n            charBound = this.__charBounds[i][j];\n\n            if (this._reSpaceAndTab.test(line[j])) {\n              charBound.width += diffSpace;\n              charBound.kernedWidth += diffSpace;\n              charBound.left += accumulatedSpace;\n              accumulatedSpace += diffSpace;\n            } else {\n              charBound.left += accumulatedSpace;\n            }\n          }\n        }\n      }\n    },\n\n    /**\n     * Detect if the text line is ended with an hard break\n     * text and itext do not have wrapping, return false\n     * @return {Boolean}\n     */\n    isEndOfWrapping: function isEndOfWrapping(lineIndex) {\n      return lineIndex === this._textLines.length - 1;\n    },\n\n    /**\n     * Detect if a line has a linebreak and so we need to account for it when moving\n     * and counting style.\n     * It return always for text and Itext.\n     * @return Number\n     */\n    missingNewlineOffset: function missingNewlineOffset() {\n      return 1;\n    },\n\n    /**\n     * Returns string representation of an instance\n     * @return {String} String representation of text object\n     */\n    toString: function toString() {\n      return '#<fabric.Text (' + this.complexity() + '): { \"text\": \"' + this.text + '\", \"fontFamily\": \"' + this.fontFamily + '\" }>';\n    },\n\n    /**\n     * Return the dimension and the zoom level needed to create a cache canvas\n     * big enough to host the object to be cached.\n     * @private\n     * @param {Object} dim.x width of object to be cached\n     * @param {Object} dim.y height of object to be cached\n     * @return {Object}.width width of canvas\n     * @return {Object}.height height of canvas\n     * @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache\n     * @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache\n     */\n    _getCacheCanvasDimensions: function _getCacheCanvasDimensions() {\n      var dims = this.callSuper('_getCacheCanvasDimensions');\n      var fontSize = this.fontSize;\n      dims.width += fontSize * dims.zoomX;\n      dims.height += fontSize * dims.zoomY;\n      return dims;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      this._setTextStyles(ctx);\n\n      this._renderTextLinesBackground(ctx);\n\n      this._renderTextDecoration(ctx, 'underline');\n\n      this._renderText(ctx);\n\n      this._renderTextDecoration(ctx, 'overline');\n\n      this._renderTextDecoration(ctx, 'linethrough');\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderText: function _renderText(ctx) {\n      if (this.paintFirst === 'stroke') {\n        this._renderTextStroke(ctx);\n\n        this._renderTextFill(ctx);\n      } else {\n        this._renderTextFill(ctx);\n\n        this._renderTextStroke(ctx);\n      }\n    },\n\n    /**\n     * Set the font parameter of the context with the object properties or with charStyle\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Object} [charStyle] object with font style properties\n     * @param {String} [charStyle.fontFamily] Font Family\n     * @param {Number} [charStyle.fontSize] Font size in pixels. ( without px suffix )\n     * @param {String} [charStyle.fontWeight] Font weight\n     * @param {String} [charStyle.fontStyle] Font style (italic|normal)\n     */\n    _setTextStyles: function _setTextStyles(ctx, charStyle, forMeasuring) {\n      ctx.textBaseline = 'alphabetic';\n      ctx.font = this._getFontDeclaration(charStyle, forMeasuring);\n    },\n\n    /**\n     * calculate and return the text Width measuring each line.\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @return {Number} Maximum width of fabric.Text object\n     */\n    calcTextWidth: function calcTextWidth() {\n      var maxWidth = this.getLineWidth(0);\n\n      for (var i = 1, len = this._textLines.length; i < len; i++) {\n        var currentLineWidth = this.getLineWidth(i);\n\n        if (currentLineWidth > maxWidth) {\n          maxWidth = currentLineWidth;\n        }\n      }\n\n      return maxWidth;\n    },\n\n    /**\n     * @private\n     * @param {String} method Method name (\"fillText\" or \"strokeText\")\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {String} line Text to render\n     * @param {Number} left Left position of text\n     * @param {Number} top Top position of text\n     * @param {Number} lineIndex Index of a line in a text\n     */\n    _renderTextLine: function _renderTextLine(method, ctx, line, left, top, lineIndex) {\n      this._renderChars(method, ctx, line, left, top, lineIndex);\n    },\n\n    /**\n     * Renders the text background for lines, taking care of style\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderTextLinesBackground: function _renderTextLinesBackground(ctx) {\n      if (!this.textBackgroundColor && !this.styleHas('textBackgroundColor')) {\n        return;\n      }\n\n      var lineTopOffset = 0,\n          heightOfLine,\n          lineLeftOffset,\n          originalFill = ctx.fillStyle,\n          line,\n          lastColor,\n          leftOffset = this._getLeftOffset(),\n          topOffset = this._getTopOffset(),\n          boxStart = 0,\n          boxWidth = 0,\n          charBox,\n          currentColor;\n\n      for (var i = 0, len = this._textLines.length; i < len; i++) {\n        heightOfLine = this.getHeightOfLine(i);\n\n        if (!this.textBackgroundColor && !this.styleHas('textBackgroundColor', i)) {\n          lineTopOffset += heightOfLine;\n          continue;\n        }\n\n        line = this._textLines[i];\n        lineLeftOffset = this._getLineLeftOffset(i);\n        boxWidth = 0;\n        boxStart = 0;\n        lastColor = this.getValueOfPropertyAt(i, 0, 'textBackgroundColor');\n\n        for (var j = 0, jlen = line.length; j < jlen; j++) {\n          charBox = this.__charBounds[i][j];\n          currentColor = this.getValueOfPropertyAt(i, j, 'textBackgroundColor');\n\n          if (currentColor !== lastColor) {\n            ctx.fillStyle = lastColor;\n            lastColor && ctx.fillRect(leftOffset + lineLeftOffset + boxStart, topOffset + lineTopOffset, boxWidth, heightOfLine / this.lineHeight);\n            boxStart = charBox.left;\n            boxWidth = charBox.width;\n            lastColor = currentColor;\n          } else {\n            boxWidth += charBox.kernedWidth;\n          }\n        }\n\n        if (currentColor) {\n          ctx.fillStyle = currentColor;\n          ctx.fillRect(leftOffset + lineLeftOffset + boxStart, topOffset + lineTopOffset, boxWidth, heightOfLine / this.lineHeight);\n        }\n\n        lineTopOffset += heightOfLine;\n      }\n\n      ctx.fillStyle = originalFill; // if there is text background color no\n      // other shadows should be casted\n\n      this._removeShadow(ctx);\n    },\n\n    /**\n     * @private\n     * @param {Object} decl style declaration for cache\n     * @param {String} decl.fontFamily fontFamily\n     * @param {String} decl.fontStyle fontStyle\n     * @param {String} decl.fontWeight fontWeight\n     * @return {Object} reference to cache\n     */\n    getFontCache: function getFontCache(decl) {\n      var fontFamily = decl.fontFamily.toLowerCase();\n\n      if (!fabric.charWidthsCache[fontFamily]) {\n        fabric.charWidthsCache[fontFamily] = {};\n      }\n\n      var cache = fabric.charWidthsCache[fontFamily],\n          cacheProp = decl.fontStyle.toLowerCase() + '_' + (decl.fontWeight + '').toLowerCase();\n\n      if (!cache[cacheProp]) {\n        cache[cacheProp] = {};\n      }\n\n      return cache[cacheProp];\n    },\n\n    /**\n     * apply all the character style to canvas for rendering\n     * @private\n     * @param {String} _char\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @param {Object} [decl]\n     */\n    _applyCharStyles: function _applyCharStyles(method, ctx, lineIndex, charIndex, styleDeclaration) {\n      this._setFillStyles(ctx, styleDeclaration);\n\n      this._setStrokeStyles(ctx, styleDeclaration);\n\n      ctx.font = this._getFontDeclaration(styleDeclaration);\n    },\n\n    /**\n     * measure and return the width of a single character.\n     * possibly overridden to accommodate different measure logic or\n     * to hook some external lib for character measurement\n     * @private\n     * @param {String} _char, char to be measured\n     * @param {Object} charStyle style of char to be measured\n     * @param {String} [previousChar] previous char\n     * @param {Object} [prevCharStyle] style of previous char\n     */\n    _measureChar: function _measureChar(_char, charStyle, previousChar, prevCharStyle) {\n      // first i try to return from cache\n      var fontCache = this.getFontCache(charStyle),\n          fontDeclaration = this._getFontDeclaration(charStyle),\n          previousFontDeclaration = this._getFontDeclaration(prevCharStyle),\n          couple = previousChar + _char,\n          stylesAreEqual = fontDeclaration === previousFontDeclaration,\n          width,\n          coupleWidth,\n          previousWidth,\n          fontMultiplier = charStyle.fontSize / this.CACHE_FONT_SIZE,\n          kernedWidth;\n\n      if (previousChar && fontCache[previousChar] !== undefined) {\n        previousWidth = fontCache[previousChar];\n      }\n\n      if (fontCache[_char] !== undefined) {\n        kernedWidth = width = fontCache[_char];\n      }\n\n      if (stylesAreEqual && fontCache[couple] !== undefined) {\n        coupleWidth = fontCache[couple];\n        kernedWidth = coupleWidth - previousWidth;\n      }\n\n      if (width === undefined || previousWidth === undefined || coupleWidth === undefined) {\n        var ctx = this.getMeasuringContext(); // send a TRUE to specify measuring font size CACHE_FONT_SIZE\n\n        this._setTextStyles(ctx, charStyle, true);\n      }\n\n      if (width === undefined) {\n        kernedWidth = width = ctx.measureText(_char).width;\n        fontCache[_char] = width;\n      }\n\n      if (previousWidth === undefined && stylesAreEqual && previousChar) {\n        previousWidth = ctx.measureText(previousChar).width;\n        fontCache[previousChar] = previousWidth;\n      }\n\n      if (stylesAreEqual && coupleWidth === undefined) {\n        // we can measure the kerning couple and subtract the width of the previous character\n        coupleWidth = ctx.measureText(couple).width;\n        fontCache[couple] = coupleWidth;\n        kernedWidth = coupleWidth - previousWidth;\n      }\n\n      return {\n        width: width * fontMultiplier,\n        kernedWidth: kernedWidth * fontMultiplier\n      };\n    },\n\n    /**\n     * Computes height of character at given position\n     * @param {Number} line the line index number\n     * @param {Number} _char the character index number\n     * @return {Number} fontSize of the character\n     */\n    getHeightOfChar: function getHeightOfChar(line, _char) {\n      return this.getValueOfPropertyAt(line, _char, 'fontSize');\n    },\n\n    /**\n     * measure a text line measuring all characters.\n     * @param {Number} lineIndex line number\n     * @return {Number} Line width\n     */\n    measureLine: function measureLine(lineIndex) {\n      var lineInfo = this._measureLine(lineIndex);\n\n      if (this.charSpacing !== 0) {\n        lineInfo.width -= this._getWidthOfCharSpacing();\n      }\n\n      if (lineInfo.width < 0) {\n        lineInfo.width = 0;\n      }\n\n      return lineInfo;\n    },\n\n    /**\n     * measure every grapheme of a line, populating __charBounds\n     * @param {Number} lineIndex\n     * @return {Object} object.width total width of characters\n     * @return {Object} object.widthOfSpaces length of chars that match this._reSpacesAndTabs\n     */\n    _measureLine: function _measureLine(lineIndex) {\n      var width = 0,\n          i,\n          grapheme,\n          line = this._textLines[lineIndex],\n          prevGrapheme,\n          graphemeInfo,\n          numOfSpaces = 0,\n          lineBounds = new Array(line.length);\n      this.__charBounds[lineIndex] = lineBounds;\n\n      for (i = 0; i < line.length; i++) {\n        grapheme = line[i];\n        graphemeInfo = this._getGraphemeBox(grapheme, lineIndex, i, prevGrapheme);\n        lineBounds[i] = graphemeInfo;\n        width += graphemeInfo.kernedWidth;\n        prevGrapheme = grapheme;\n      } // this latest bound box represent the last character of the line\n      // to simplify cursor handling in interactive mode.\n\n\n      lineBounds[i] = {\n        left: graphemeInfo ? graphemeInfo.left + graphemeInfo.width : 0,\n        width: 0,\n        kernedWidth: 0,\n        height: this.fontSize\n      };\n      return {\n        width: width,\n        numOfSpaces: numOfSpaces\n      };\n    },\n\n    /**\n     * Measure and return the info of a single grapheme.\n     * needs the the info of previous graphemes already filled\n     * @private\n     * @param {String} grapheme to be measured\n     * @param {Number} lineIndex index of the line where the char is\n     * @param {Number} charIndex position in the line\n     * @param {String} [prevGrapheme] character preceding the one to be measured\n     */\n    _getGraphemeBox: function _getGraphemeBox(grapheme, lineIndex, charIndex, prevGrapheme, skipLeft) {\n      var style = this.getCompleteStyleDeclaration(lineIndex, charIndex),\n          prevStyle = prevGrapheme ? this.getCompleteStyleDeclaration(lineIndex, charIndex - 1) : {},\n          info = this._measureChar(grapheme, style, prevGrapheme, prevStyle),\n          kernedWidth = info.kernedWidth,\n          width = info.width,\n          charSpacing;\n\n      if (this.charSpacing !== 0) {\n        charSpacing = this._getWidthOfCharSpacing();\n        width += charSpacing;\n        kernedWidth += charSpacing;\n      }\n\n      var box = {\n        width: width,\n        left: 0,\n        height: style.fontSize,\n        kernedWidth: kernedWidth,\n        deltaY: style.deltaY\n      };\n\n      if (charIndex > 0 && !skipLeft) {\n        var previousBox = this.__charBounds[lineIndex][charIndex - 1];\n        box.left = previousBox.left + previousBox.width + info.kernedWidth - info.width;\n      }\n\n      return box;\n    },\n\n    /**\n     * Calculate height of line at 'lineIndex'\n     * @param {Number} lineIndex index of line to calculate\n     * @return {Number}\n     */\n    getHeightOfLine: function getHeightOfLine(lineIndex) {\n      if (this.__lineHeights[lineIndex]) {\n        return this.__lineHeights[lineIndex];\n      }\n\n      var line = this._textLines[lineIndex],\n          // char 0 is measured before the line cycle because it nneds to char\n      // emptylines\n      maxHeight = this.getHeightOfChar(lineIndex, 0);\n\n      for (var i = 1, len = line.length; i < len; i++) {\n        maxHeight = Math.max(this.getHeightOfChar(lineIndex, i), maxHeight);\n      }\n\n      return this.__lineHeights[lineIndex] = maxHeight * this.lineHeight * this._fontSizeMult;\n    },\n\n    /**\n     * Calculate text box height\n     */\n    calcTextHeight: function calcTextHeight() {\n      var lineHeight,\n          height = 0;\n\n      for (var i = 0, len = this._textLines.length; i < len; i++) {\n        lineHeight = this.getHeightOfLine(i);\n        height += i === len - 1 ? lineHeight / this.lineHeight : lineHeight;\n      }\n\n      return height;\n    },\n\n    /**\n     * @private\n     * @return {Number} Left offset\n     */\n    _getLeftOffset: function _getLeftOffset() {\n      return -this.width / 2;\n    },\n\n    /**\n     * @private\n     * @return {Number} Top offset\n     */\n    _getTopOffset: function _getTopOffset() {\n      return -this.height / 2;\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Object} filler fabric.Pattern or fabric.Gradient\n     * @return {Object} offset.offsetX offset for text rendering\n     * @return {Object} offset.offsetY offset for text rendering\n     */\n    _applyPatternGradientTransform: function _applyPatternGradientTransform(ctx, filler) {\n      if (!filler || !filler.toLive) {\n        return {\n          offsetX: 0,\n          offsetY: 0\n        };\n      }\n\n      var offsetX = -this.width / 2 + filler.offsetX || 0,\n          offsetY = -this.height / 2 + filler.offsetY || 0;\n      ctx.transform(1, 0, 0, 1, offsetX, offsetY);\n      return {\n        offsetX: offsetX,\n        offsetY: offsetY\n      };\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {String} method Method name (\"fillText\" or \"strokeText\")\n     */\n    _renderTextCommon: function _renderTextCommon(ctx, method) {\n      ctx.save();\n\n      var lineHeights = 0,\n          left = this._getLeftOffset(),\n          top = this._getTopOffset(),\n          offsets = this._applyPatternGradientTransform(ctx, method === 'fillText' ? this.fill : this.stroke);\n\n      for (var i = 0, len = this._textLines.length; i < len; i++) {\n        var heightOfLine = this.getHeightOfLine(i),\n            maxHeight = heightOfLine / this.lineHeight,\n            leftOffset = this._getLineLeftOffset(i);\n\n        this._renderTextLine(method, ctx, this._textLines[i], left + leftOffset - offsets.offsetX, top + lineHeights + maxHeight - offsets.offsetY, i);\n\n        lineHeights += heightOfLine;\n      }\n\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderTextFill: function _renderTextFill(ctx) {\n      if (!this.fill && !this.styleHas('fill')) {\n        return;\n      }\n\n      this._renderTextCommon(ctx, 'fillText');\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderTextStroke: function _renderTextStroke(ctx) {\n      if ((!this.stroke || this.strokeWidth === 0) && this.isEmptyStyles()) {\n        return;\n      }\n\n      if (this.shadow && !this.shadow.affectStroke) {\n        this._removeShadow(ctx);\n      }\n\n      ctx.save();\n\n      this._setLineDash(ctx, this.strokeDashArray);\n\n      ctx.beginPath();\n\n      this._renderTextCommon(ctx, 'strokeText');\n\n      ctx.closePath();\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {String} method\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {String} line Content of the line\n     * @param {Number} left\n     * @param {Number} top\n     * @param {Number} lineIndex\n     * @param {Number} charOffset\n     */\n    _renderChars: function _renderChars(method, ctx, line, left, top, lineIndex) {\n      // set proper line offset\n      var lineHeight = this.getHeightOfLine(lineIndex),\n          isJustify = this.textAlign.indexOf('justify') !== -1,\n          actualStyle,\n          nextStyle,\n          charsToRender = '',\n          charBox,\n          boxWidth = 0,\n          timeToRender,\n          shortCut = !isJustify && this.charSpacing === 0 && this.isEmptyStyles(lineIndex);\n      ctx.save();\n      top -= lineHeight * this._fontSizeFraction / this.lineHeight;\n\n      if (shortCut) {\n        // render all the line in one pass without checking\n        this._renderChar(method, ctx, lineIndex, 0, this.textLines[lineIndex], left, top, lineHeight);\n\n        ctx.restore();\n        return;\n      }\n\n      for (var i = 0, len = line.length - 1; i <= len; i++) {\n        timeToRender = i === len || this.charSpacing;\n        charsToRender += line[i];\n        charBox = this.__charBounds[lineIndex][i];\n\n        if (boxWidth === 0) {\n          left += charBox.kernedWidth - charBox.width;\n          boxWidth += charBox.width;\n        } else {\n          boxWidth += charBox.kernedWidth;\n        }\n\n        if (isJustify && !timeToRender) {\n          if (this._reSpaceAndTab.test(line[i])) {\n            timeToRender = true;\n          }\n        }\n\n        if (!timeToRender) {\n          // if we have charSpacing, we render char by char\n          actualStyle = actualStyle || this.getCompleteStyleDeclaration(lineIndex, i);\n          nextStyle = this.getCompleteStyleDeclaration(lineIndex, i + 1);\n          timeToRender = this._hasStyleChanged(actualStyle, nextStyle);\n        }\n\n        if (timeToRender) {\n          this._renderChar(method, ctx, lineIndex, i, charsToRender, left, top, lineHeight);\n\n          charsToRender = '';\n          actualStyle = nextStyle;\n          left += boxWidth;\n          boxWidth = 0;\n        }\n      }\n\n      ctx.restore();\n    },\n\n    /**\n     * @private\n     * @param {String} method\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @param {String} _char\n     * @param {Number} left Left coordinate\n     * @param {Number} top Top coordinate\n     * @param {Number} lineHeight Height of the line\n     */\n    _renderChar: function _renderChar(method, ctx, lineIndex, charIndex, _char, left, top) {\n      var decl = this._getStyleDeclaration(lineIndex, charIndex),\n          fullDecl = this.getCompleteStyleDeclaration(lineIndex, charIndex),\n          shouldFill = method === 'fillText' && fullDecl.fill,\n          shouldStroke = method === 'strokeText' && fullDecl.stroke && fullDecl.strokeWidth;\n\n      if (!shouldStroke && !shouldFill) {\n        return;\n      }\n\n      decl && ctx.save();\n\n      this._applyCharStyles(method, ctx, lineIndex, charIndex, fullDecl);\n\n      if (decl && decl.textBackgroundColor) {\n        this._removeShadow(ctx);\n      }\n\n      if (decl && decl.deltaY) {\n        top += decl.deltaY;\n      }\n\n      shouldFill && ctx.fillText(_char, left, top);\n      shouldStroke && ctx.strokeText(_char, left, top);\n      decl && ctx.restore();\n    },\n\n    /**\n     * Turns the character into a 'superior figure' (i.e. 'superscript')\n     * @param {Number} start selection start\n     * @param {Number} end selection end\n     * @returns {fabric.Text} thisArg\n     * @chainable\n     */\n    setSuperscript: function setSuperscript(start, end) {\n      return this._setScript(start, end, this.superscript);\n    },\n\n    /**\n     * Turns the character into an 'inferior figure' (i.e. 'subscript')\n     * @param {Number} start selection start\n     * @param {Number} end selection end\n     * @returns {fabric.Text} thisArg\n     * @chainable\n     */\n    setSubscript: function setSubscript(start, end) {\n      return this._setScript(start, end, this.subscript);\n    },\n\n    /**\n     * Applies 'schema' at given position\n     * @private\n     * @param {Number} start selection start\n     * @param {Number} end selection end\n     * @param {Number} schema\n     * @returns {fabric.Text} thisArg\n     * @chainable\n     */\n    _setScript: function _setScript(start, end, schema) {\n      var loc = this.get2DCursorLocation(start, true),\n          fontSize = this.getValueOfPropertyAt(loc.lineIndex, loc.charIndex, 'fontSize'),\n          dy = this.getValueOfPropertyAt(loc.lineIndex, loc.charIndex, 'deltaY'),\n          style = {\n        fontSize: fontSize * schema.size,\n        deltaY: dy + fontSize * schema.baseline\n      };\n      this.setSelectionStyles(style, start, end);\n      return this;\n    },\n\n    /**\n     * @private\n     * @param {Object} prevStyle\n     * @param {Object} thisStyle\n     */\n    _hasStyleChanged: function _hasStyleChanged(prevStyle, thisStyle) {\n      return prevStyle.fill !== thisStyle.fill || prevStyle.stroke !== thisStyle.stroke || prevStyle.strokeWidth !== thisStyle.strokeWidth || prevStyle.fontSize !== thisStyle.fontSize || prevStyle.fontFamily !== thisStyle.fontFamily || prevStyle.fontWeight !== thisStyle.fontWeight || prevStyle.fontStyle !== thisStyle.fontStyle || prevStyle.deltaY !== thisStyle.deltaY;\n    },\n\n    /**\n     * @private\n     * @param {Object} prevStyle\n     * @param {Object} thisStyle\n     */\n    _hasStyleChangedForSvg: function _hasStyleChangedForSvg(prevStyle, thisStyle) {\n      return this._hasStyleChanged(prevStyle, thisStyle) || prevStyle.overline !== thisStyle.overline || prevStyle.underline !== thisStyle.underline || prevStyle.linethrough !== thisStyle.linethrough;\n    },\n\n    /**\n     * @private\n     * @param {Number} lineIndex index text line\n     * @return {Number} Line left offset\n     */\n    _getLineLeftOffset: function _getLineLeftOffset(lineIndex) {\n      var lineWidth = this.getLineWidth(lineIndex);\n\n      if (this.textAlign === 'center') {\n        return (this.width - lineWidth) / 2;\n      }\n\n      if (this.textAlign === 'right') {\n        return this.width - lineWidth;\n      }\n\n      if (this.textAlign === 'justify-center' && this.isEndOfWrapping(lineIndex)) {\n        return (this.width - lineWidth) / 2;\n      }\n\n      if (this.textAlign === 'justify-right' && this.isEndOfWrapping(lineIndex)) {\n        return this.width - lineWidth;\n      }\n\n      return 0;\n    },\n\n    /**\n     * @private\n     */\n    _clearCache: function _clearCache() {\n      this.__lineWidths = [];\n      this.__lineHeights = [];\n      this.__charBounds = [];\n    },\n\n    /**\n     * @private\n     */\n    _shouldClearDimensionCache: function _shouldClearDimensionCache() {\n      var shouldClear = this._forceClearCache;\n      shouldClear || (shouldClear = this.hasStateChanged('_dimensionAffectingProps'));\n\n      if (shouldClear) {\n        this.dirty = true;\n        this._forceClearCache = false;\n      }\n\n      return shouldClear;\n    },\n\n    /**\n     * Measure a single line given its index. Used to calculate the initial\n     * text bounding box. The values are calculated and stored in __lineWidths cache.\n     * @private\n     * @param {Number} lineIndex line number\n     * @return {Number} Line width\n     */\n    getLineWidth: function getLineWidth(lineIndex) {\n      if (this.__lineWidths[lineIndex]) {\n        return this.__lineWidths[lineIndex];\n      }\n\n      var width,\n          line = this._textLines[lineIndex],\n          lineInfo;\n\n      if (line === '') {\n        width = 0;\n      } else {\n        lineInfo = this.measureLine(lineIndex);\n        width = lineInfo.width;\n      }\n\n      this.__lineWidths[lineIndex] = width;\n      return width;\n    },\n    _getWidthOfCharSpacing: function _getWidthOfCharSpacing() {\n      if (this.charSpacing !== 0) {\n        return this.fontSize * this.charSpacing / 1000;\n      }\n\n      return 0;\n    },\n\n    /**\n     * Retrieves the value of property at given character position\n     * @param {Number} lineIndex the line number\n     * @param {Number} charIndex the charater number\n     * @param {String} property the property name\n     * @returns the value of 'property'\n     */\n    getValueOfPropertyAt: function getValueOfPropertyAt(lineIndex, charIndex, property) {\n      var charStyle = this._getStyleDeclaration(lineIndex, charIndex);\n\n      if (charStyle && typeof charStyle[property] !== 'undefined') {\n        return charStyle[property];\n      }\n\n      return this[property];\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _renderTextDecoration: function _renderTextDecoration(ctx, type) {\n      if (!this[type] && !this.styleHas(type)) {\n        return;\n      }\n\n      var heightOfLine,\n          size,\n          _size,\n          lineLeftOffset,\n          dy,\n          _dy,\n          line,\n          lastDecoration,\n          leftOffset = this._getLeftOffset(),\n          topOffset = this._getTopOffset(),\n          top,\n          boxStart,\n          boxWidth,\n          charBox,\n          currentDecoration,\n          maxHeight,\n          currentFill,\n          lastFill,\n          charSpacing = this._getWidthOfCharSpacing();\n\n      for (var i = 0, len = this._textLines.length; i < len; i++) {\n        heightOfLine = this.getHeightOfLine(i);\n\n        if (!this[type] && !this.styleHas(type, i)) {\n          topOffset += heightOfLine;\n          continue;\n        }\n\n        line = this._textLines[i];\n        maxHeight = heightOfLine / this.lineHeight;\n        lineLeftOffset = this._getLineLeftOffset(i);\n        boxStart = 0;\n        boxWidth = 0;\n        lastDecoration = this.getValueOfPropertyAt(i, 0, type);\n        lastFill = this.getValueOfPropertyAt(i, 0, 'fill');\n        top = topOffset + maxHeight * (1 - this._fontSizeFraction);\n        size = this.getHeightOfChar(i, 0);\n        dy = this.getValueOfPropertyAt(i, 0, 'deltaY');\n\n        for (var j = 0, jlen = line.length; j < jlen; j++) {\n          charBox = this.__charBounds[i][j];\n          currentDecoration = this.getValueOfPropertyAt(i, j, type);\n          currentFill = this.getValueOfPropertyAt(i, j, 'fill');\n          _size = this.getHeightOfChar(i, j);\n          _dy = this.getValueOfPropertyAt(i, j, 'deltaY');\n\n          if ((currentDecoration !== lastDecoration || currentFill !== lastFill || _size !== size || _dy !== dy) && boxWidth > 0) {\n            ctx.fillStyle = lastFill;\n            lastDecoration && lastFill && ctx.fillRect(leftOffset + lineLeftOffset + boxStart, top + this.offsets[type] * size + dy, boxWidth, this.fontSize / 15);\n            boxStart = charBox.left;\n            boxWidth = charBox.width;\n            lastDecoration = currentDecoration;\n            lastFill = currentFill;\n            size = _size;\n            dy = _dy;\n          } else {\n            boxWidth += charBox.kernedWidth;\n          }\n        }\n\n        ctx.fillStyle = currentFill;\n        currentDecoration && currentFill && ctx.fillRect(leftOffset + lineLeftOffset + boxStart, top + this.offsets[type] * size + dy, boxWidth - charSpacing, this.fontSize / 15);\n        topOffset += heightOfLine;\n      } // if there is text background color no\n      // other shadows should be casted\n\n\n      this._removeShadow(ctx);\n    },\n\n    /**\n     * return font declaration string for canvas context\n     * @param {Object} [styleObject] object\n     * @returns {String} font declaration formatted for canvas context.\n     */\n    _getFontDeclaration: function _getFontDeclaration(styleObject, forMeasuring) {\n      var style = styleObject || this,\n          family = this.fontFamily,\n          fontIsGeneric = fabric.Text.genericFonts.indexOf(family.toLowerCase()) > -1;\n      var fontFamily = family === undefined || family.indexOf('\\'') > -1 || family.indexOf(',') > -1 || family.indexOf('\"') > -1 || fontIsGeneric ? style.fontFamily : '\"' + style.fontFamily + '\"';\n      return [// node-canvas needs \"weight style\", while browsers need \"style weight\"\n        // verify if this can be fixed in JSDOM\n      fabric.isLikelyNode ? style.fontWeight : style.fontStyle, fabric.isLikelyNode ? style.fontStyle : style.fontWeight, forMeasuring ? this.CACHE_FONT_SIZE + 'px' : style.fontSize + 'px', fontFamily].join(' ');\n    },\n\n    /**\n     * Renders text instance on a specified context\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    render: function render(ctx) {\n      // do not render if object is not visible\n      if (!this.visible) {\n        return;\n      }\n\n      if (this.canvas && this.canvas.skipOffscreen && !this.group && !this.isOnScreen()) {\n        return;\n      }\n\n      if (this._shouldClearDimensionCache()) {\n        this.initDimensions();\n      }\n\n      this.callSuper('render', ctx);\n    },\n\n    /**\n     * Returns the text as an array of lines.\n     * @param {String} text text to split\n     * @returns {Array} Lines in the text\n     */\n    _splitTextIntoLines: function _splitTextIntoLines(text) {\n      var lines = text.split(this._reNewline),\n          newLines = new Array(lines.length),\n          newLine = ['\\n'],\n          newText = [];\n\n      for (var i = 0; i < lines.length; i++) {\n        newLines[i] = fabric.util.string.graphemeSplit(lines[i]);\n        newText = newText.concat(newLines[i], newLine);\n      }\n\n      newText.pop();\n      return {\n        _unwrappedLines: newLines,\n        lines: lines,\n        graphemeText: newText,\n        graphemeLines: newLines\n      };\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} Object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      var additionalProperties = ['text', 'fontSize', 'fontWeight', 'fontFamily', 'fontStyle', 'lineHeight', 'underline', 'overline', 'linethrough', 'textAlign', 'textBackgroundColor', 'charSpacing'].concat(propertiesToInclude);\n      var obj = this.callSuper('toObject', additionalProperties);\n      obj.styles = clone(this.styles, true);\n      return obj;\n    },\n\n    /**\n     * Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.\n     * @param {String|Object} key Property name or object (if object, iterate over the object properties)\n     * @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)\n     * @return {fabric.Object} thisArg\n     * @chainable\n     */\n    set: function set(key, value) {\n      this.callSuper('set', key, value);\n      var needsDims = false;\n\n      if (_typeof(key) === 'object') {\n        for (var _key in key) {\n          needsDims = needsDims || this._dimensionAffectingProps.indexOf(_key) !== -1;\n        }\n      } else {\n        needsDims = this._dimensionAffectingProps.indexOf(key) !== -1;\n      }\n\n      if (needsDims) {\n        this.initDimensions();\n        this.setCoords();\n      }\n\n      return this;\n    },\n\n    /**\n     * Returns complexity of an instance\n     * @return {Number} complexity\n     */\n    complexity: function complexity() {\n      return 1;\n    }\n  });\n  /**\n   * Returns fabric.Text instance from an object representation\n   * @static\n   * @memberOf fabric.Text\n   * @param {Object} object Object to create an instance from\n   * @param {Function} [callback] Callback to invoke when an fabric.Text instance is created\n   */\n\n  fabric.Text.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Text', object, callback, 'text');\n  };\n\n  fabric.Text.genericFonts = ['sans-serif', 'serif', 'cursive', 'fantasy', 'monospace'];\n  fabric.util.createAccessors && fabric.util.createAccessors(fabric.Text);\n})(typeof exports !== 'undefined' ? exports : this);\n\n(function () {\n  fabric.util.object.extend(fabric.Text.prototype,\n  /** @lends fabric.Text.prototype */\n  {\n    /**\n     * Returns true if object has no styling or no styling in a line\n     * @param {Number} lineIndex , lineIndex is on wrapped lines.\n     * @return {Boolean}\n     */\n    isEmptyStyles: function isEmptyStyles(lineIndex) {\n      if (!this.styles) {\n        return true;\n      }\n\n      if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {\n        return true;\n      }\n\n      var obj = typeof lineIndex === 'undefined' ? this.styles : {\n        line: this.styles[lineIndex]\n      };\n\n      for (var p1 in obj) {\n        for (var p2 in obj[p1]) {\n          // eslint-disable-next-line no-unused-vars\n          for (var p3 in obj[p1][p2]) {\n            return false;\n          }\n        }\n      }\n\n      return true;\n    },\n\n    /**\n     * Returns true if object has a style property or has it ina specified line\n     * This function is used to detect if a text will use a particular property or not.\n     * @param {String} property to check for\n     * @param {Number} lineIndex to check the style on\n     * @return {Boolean}\n     */\n    styleHas: function styleHas(property, lineIndex) {\n      if (!this.styles || !property || property === '') {\n        return false;\n      }\n\n      if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {\n        return false;\n      }\n\n      var obj = typeof lineIndex === 'undefined' ? this.styles : {\n        0: this.styles[lineIndex]\n      }; // eslint-disable-next-line\n\n      for (var p1 in obj) {\n        // eslint-disable-next-line\n        for (var p2 in obj[p1]) {\n          if (typeof obj[p1][p2][property] !== 'undefined') {\n            return true;\n          }\n        }\n      }\n\n      return false;\n    },\n\n    /**\n     * Check if characters in a text have a value for a property\n     * whose value matches the textbox's value for that property.  If so,\n     * the character-level property is deleted.  If the character\n     * has no other properties, then it is also deleted.  Finally,\n     * if the line containing that character has no other characters\n     * then it also is deleted.\n     *\n     * @param {string} property The property to compare between characters and text.\n     */\n    cleanStyle: function cleanStyle(property) {\n      if (!this.styles || !property || property === '') {\n        return false;\n      }\n\n      var obj = this.styles,\n          stylesCount = 0,\n          letterCount,\n          stylePropertyValue,\n          allStyleObjectPropertiesMatch = true,\n          graphemeCount = 0,\n          styleObject; // eslint-disable-next-line\n\n      for (var p1 in obj) {\n        letterCount = 0; // eslint-disable-next-line\n\n        for (var p2 in obj[p1]) {\n          var styleObject = obj[p1][p2],\n              stylePropertyHasBeenSet = styleObject.hasOwnProperty(property);\n          stylesCount++;\n\n          if (stylePropertyHasBeenSet) {\n            if (!stylePropertyValue) {\n              stylePropertyValue = styleObject[property];\n            } else if (styleObject[property] !== stylePropertyValue) {\n              allStyleObjectPropertiesMatch = false;\n            }\n\n            if (styleObject[property] === this[property]) {\n              delete styleObject[property];\n            }\n          } else {\n            allStyleObjectPropertiesMatch = false;\n          }\n\n          if (Object.keys(styleObject).length !== 0) {\n            letterCount++;\n          } else {\n            delete obj[p1][p2];\n          }\n        }\n\n        if (letterCount === 0) {\n          delete obj[p1];\n        }\n      } // if every grapheme has the same style set then\n      // delete those styles and set it on the parent\n\n\n      for (var i = 0; i < this._textLines.length; i++) {\n        graphemeCount += this._textLines[i].length;\n      }\n\n      if (allStyleObjectPropertiesMatch && stylesCount === graphemeCount) {\n        this[property] = stylePropertyValue;\n        this.removeStyle(property);\n      }\n    },\n\n    /**\n     * Remove a style property or properties from all individual character styles\n     * in a text object.  Deletes the character style object if it contains no other style\n     * props.  Deletes a line style object if it contains no other character styles.\n     *\n     * @param {String} props The property to remove from character styles.\n     */\n    removeStyle: function removeStyle(property) {\n      if (!this.styles || !property || property === '') {\n        return;\n      }\n\n      var obj = this.styles,\n          line,\n          lineNum,\n          charNum;\n\n      for (lineNum in obj) {\n        line = obj[lineNum];\n\n        for (charNum in line) {\n          delete line[charNum][property];\n\n          if (Object.keys(line[charNum]).length === 0) {\n            delete line[charNum];\n          }\n        }\n\n        if (Object.keys(line).length === 0) {\n          delete obj[lineNum];\n        }\n      }\n    },\n\n    /**\n     * @private\n     */\n    _extendStyles: function _extendStyles(index, styles) {\n      var loc = this.get2DCursorLocation(index);\n\n      if (!this._getLineStyle(loc.lineIndex)) {\n        this._setLineStyle(loc.lineIndex);\n      }\n\n      if (!this._getStyleDeclaration(loc.lineIndex, loc.charIndex)) {\n        this._setStyleDeclaration(loc.lineIndex, loc.charIndex, {});\n      }\n\n      fabric.util.object.extend(this._getStyleDeclaration(loc.lineIndex, loc.charIndex), styles);\n    },\n\n    /**\n     * Returns 2d representation (lineIndex and charIndex) of cursor (or selection start)\n     * @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used.\n     * @param {Boolean} [skipWrapping] consider the location for unwrapped lines. usefull to manage styles.\n     */\n    get2DCursorLocation: function get2DCursorLocation(selectionStart, skipWrapping) {\n      if (typeof selectionStart === 'undefined') {\n        selectionStart = this.selectionStart;\n      }\n\n      var lines = skipWrapping ? this._unwrappedTextLines : this._textLines,\n          len = lines.length;\n\n      for (var i = 0; i < len; i++) {\n        if (selectionStart <= lines[i].length) {\n          return {\n            lineIndex: i,\n            charIndex: selectionStart\n          };\n        }\n\n        selectionStart -= lines[i].length + this.missingNewlineOffset(i);\n      }\n\n      return {\n        lineIndex: i - 1,\n        charIndex: lines[i - 1].length < selectionStart ? lines[i - 1].length : selectionStart\n      };\n    },\n\n    /**\n     * Gets style of a current selection/cursor (at the start position)\n     * if startIndex or endIndex are not provided, slectionStart or selectionEnd will be used.\n     * @param {Number} [startIndex] Start index to get styles at\n     * @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1\n     * @param {Boolean} [complete] get full style or not\n     * @return {Array} styles an array with one, zero or more Style objects\n     */\n    getSelectionStyles: function getSelectionStyles(startIndex, endIndex, complete) {\n      if (typeof startIndex === 'undefined') {\n        startIndex = this.selectionStart || 0;\n      }\n\n      if (typeof endIndex === 'undefined') {\n        endIndex = this.selectionEnd || startIndex;\n      }\n\n      var styles = [];\n\n      for (var i = startIndex; i < endIndex; i++) {\n        styles.push(this.getStyleAtPosition(i, complete));\n      }\n\n      return styles;\n    },\n\n    /**\n     * Gets style of a current selection/cursor position\n     * @param {Number} position  to get styles at\n     * @param {Boolean} [complete] full style if true\n     * @return {Object} style Style object at a specified index\n     * @private\n     */\n    getStyleAtPosition: function getStyleAtPosition(position, complete) {\n      var loc = this.get2DCursorLocation(position),\n          style = complete ? this.getCompleteStyleDeclaration(loc.lineIndex, loc.charIndex) : this._getStyleDeclaration(loc.lineIndex, loc.charIndex);\n      return style || {};\n    },\n\n    /**\n     * Sets style of a current selection, if no selection exist, do not set anything.\n     * @param {Object} [styles] Styles object\n     * @param {Number} [startIndex] Start index to get styles at\n     * @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1\n     * @return {fabric.IText} thisArg\n     * @chainable\n     */\n    setSelectionStyles: function setSelectionStyles(styles, startIndex, endIndex) {\n      if (typeof startIndex === 'undefined') {\n        startIndex = this.selectionStart || 0;\n      }\n\n      if (typeof endIndex === 'undefined') {\n        endIndex = this.selectionEnd || startIndex;\n      }\n\n      for (var i = startIndex; i < endIndex; i++) {\n        this._extendStyles(i, styles);\n      }\n      /* not included in _extendStyles to avoid clearing cache more than once */\n\n\n      this._forceClearCache = true;\n      return this;\n    },\n\n    /**\n     * get the reference, not a clone, of the style object for a given character\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @return {Object} style object\n     */\n    _getStyleDeclaration: function _getStyleDeclaration(lineIndex, charIndex) {\n      var lineStyle = this.styles && this.styles[lineIndex];\n\n      if (!lineStyle) {\n        return null;\n      }\n\n      return lineStyle[charIndex];\n    },\n\n    /**\n     * return a new object that contains all the style property for a character\n     * the object returned is newly created\n     * @param {Number} lineIndex of the line where the character is\n     * @param {Number} charIndex position of the character on the line\n     * @return {Object} style object\n     */\n    getCompleteStyleDeclaration: function getCompleteStyleDeclaration(lineIndex, charIndex) {\n      var style = this._getStyleDeclaration(lineIndex, charIndex) || {},\n          styleObject = {},\n          prop;\n\n      for (var i = 0; i < this._styleProperties.length; i++) {\n        prop = this._styleProperties[i];\n        styleObject[prop] = typeof style[prop] === 'undefined' ? this[prop] : style[prop];\n      }\n\n      return styleObject;\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @param {Object} style\n     * @private\n     */\n    _setStyleDeclaration: function _setStyleDeclaration(lineIndex, charIndex, style) {\n      this.styles[lineIndex][charIndex] = style;\n    },\n\n    /**\n     *\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @private\n     */\n    _deleteStyleDeclaration: function _deleteStyleDeclaration(lineIndex, charIndex) {\n      delete this.styles[lineIndex][charIndex];\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @return {Boolean} if the line exists or not\n     * @private\n     */\n    _getLineStyle: function _getLineStyle(lineIndex) {\n      return !!this.styles[lineIndex];\n    },\n\n    /**\n     * Set the line style to an empty object so that is initialized\n     * @param {Number} lineIndex\n     * @private\n     */\n    _setLineStyle: function _setLineStyle(lineIndex) {\n      this.styles[lineIndex] = {};\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @private\n     */\n    _deleteLineStyle: function _deleteLineStyle(lineIndex) {\n      delete this.styles[lineIndex];\n    }\n  });\n})();\n\n(function () {\n  function parseDecoration(object) {\n    if (object.textDecoration) {\n      object.textDecoration.indexOf('underline') > -1 && (object.underline = true);\n      object.textDecoration.indexOf('line-through') > -1 && (object.linethrough = true);\n      object.textDecoration.indexOf('overline') > -1 && (object.overline = true);\n      delete object.textDecoration;\n    }\n  }\n  /**\n   * IText class (introduced in <b>v1.4</b>) Events are also fired with \"text:\"\n   * prefix when observing canvas.\n   * @class fabric.IText\n   * @extends fabric.Text\n   * @mixes fabric.Observable\n   *\n   * @fires changed\n   * @fires selection:changed\n   * @fires editing:entered\n   * @fires editing:exited\n   *\n   * @return {fabric.IText} thisArg\n   * @see {@link fabric.IText#initialize} for constructor definition\n   *\n   * <p>Supported key combinations:</p>\n   * <pre>\n   *   Move cursor:                    left, right, up, down\n   *   Select character:               shift + left, shift + right\n   *   Select text vertically:         shift + up, shift + down\n   *   Move cursor by word:            alt + left, alt + right\n   *   Select words:                   shift + alt + left, shift + alt + right\n   *   Move cursor to line start/end:  cmd + left, cmd + right or home, end\n   *   Select till start/end of line:  cmd + shift + left, cmd + shift + right or shift + home, shift + end\n   *   Jump to start/end of text:      cmd + up, cmd + down\n   *   Select till start/end of text:  cmd + shift + up, cmd + shift + down or shift + pgUp, shift + pgDown\n   *   Delete character:               backspace\n   *   Delete word:                    alt + backspace\n   *   Delete line:                    cmd + backspace\n   *   Forward delete:                 delete\n   *   Copy text:                      ctrl/cmd + c\n   *   Paste text:                     ctrl/cmd + v\n   *   Cut text:                       ctrl/cmd + x\n   *   Select entire text:             ctrl/cmd + a\n   *   Quit editing                    tab or esc\n   * </pre>\n   *\n   * <p>Supported mouse/touch combination</p>\n   * <pre>\n   *   Position cursor:                click/touch\n   *   Create selection:               click/touch & drag\n   *   Create selection:               click & shift + click\n   *   Select word:                    double click\n   *   Select line:                    triple click\n   * </pre>\n   */\n\n\n  fabric.IText = fabric.util.createClass(fabric.Text, fabric.Observable,\n  /** @lends fabric.IText.prototype */\n  {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'i-text',\n\n    /**\n     * Index where text selection starts (or where cursor is when there is no selection)\n     * @type Number\n     * @default\n     */\n    selectionStart: 0,\n\n    /**\n     * Index where text selection ends\n     * @type Number\n     * @default\n     */\n    selectionEnd: 0,\n\n    /**\n     * Color of text selection\n     * @type String\n     * @default\n     */\n    selectionColor: 'rgba(17,119,255,0.3)',\n\n    /**\n     * Indicates whether text is in editing mode\n     * @type Boolean\n     * @default\n     */\n    isEditing: false,\n\n    /**\n     * Indicates whether a text can be edited\n     * @type Boolean\n     * @default\n     */\n    editable: true,\n\n    /**\n     * Border color of text object while it's in editing mode\n     * @type String\n     * @default\n     */\n    editingBorderColor: 'rgba(102,153,255,0.25)',\n\n    /**\n     * Width of cursor (in px)\n     * @type Number\n     * @default\n     */\n    cursorWidth: 2,\n\n    /**\n     * Color of default cursor (when not overwritten by character style)\n     * @type String\n     * @default\n     */\n    cursorColor: '#333',\n\n    /**\n     * Delay between cursor blink (in ms)\n     * @type Number\n     * @default\n     */\n    cursorDelay: 1000,\n\n    /**\n     * Duration of cursor fadein (in ms)\n     * @type Number\n     * @default\n     */\n    cursorDuration: 600,\n\n    /**\n     * Indicates whether internal text char widths can be cached\n     * @type Boolean\n     * @default\n     */\n    caching: true,\n\n    /**\n     * @private\n     */\n    _reSpace: /\\s|\\n/,\n\n    /**\n     * @private\n     */\n    _currentCursorOpacity: 0,\n\n    /**\n     * @private\n     */\n    _selectionDirection: null,\n\n    /**\n     * @private\n     */\n    _abortCursorAnimation: false,\n\n    /**\n     * @private\n     */\n    __widthOfSpace: [],\n\n    /**\n     * Helps determining when the text is in composition, so that the cursor\n     * rendering is altered.\n     */\n    inCompositionMode: false,\n\n    /**\n     * Constructor\n     * @param {String} text Text string\n     * @param {Object} [options] Options object\n     * @return {fabric.IText} thisArg\n     */\n    initialize: function initialize(text, options) {\n      this.callSuper('initialize', text, options);\n      this.initBehavior();\n    },\n\n    /**\n     * Sets selection start (left boundary of a selection)\n     * @param {Number} index Index to set selection start to\n     */\n    setSelectionStart: function setSelectionStart(index) {\n      index = Math.max(index, 0);\n\n      this._updateAndFire('selectionStart', index);\n    },\n\n    /**\n     * Sets selection end (right boundary of a selection)\n     * @param {Number} index Index to set selection end to\n     */\n    setSelectionEnd: function setSelectionEnd(index) {\n      index = Math.min(index, this.text.length);\n\n      this._updateAndFire('selectionEnd', index);\n    },\n\n    /**\n     * @private\n     * @param {String} property 'selectionStart' or 'selectionEnd'\n     * @param {Number} index new position of property\n     */\n    _updateAndFire: function _updateAndFire(property, index) {\n      if (this[property] !== index) {\n        this._fireSelectionChanged();\n\n        this[property] = index;\n      }\n\n      this._updateTextarea();\n    },\n\n    /**\n     * Fires the even of selection changed\n     * @private\n     */\n    _fireSelectionChanged: function _fireSelectionChanged() {\n      this.fire('selection:changed');\n      this.canvas && this.canvas.fire('text:selection:changed', {\n        target: this\n      });\n    },\n\n    /**\n     * Initialize text dimensions. Render all text on given context\n     * or on a offscreen canvas to get the text width with measureText.\n     * Updates this.width and this.height with the proper values.\n     * Does not return dimensions.\n     * @private\n     */\n    initDimensions: function initDimensions() {\n      this.isEditing && this.initDelayedCursor();\n      this.clearContextTop();\n      this.callSuper('initDimensions');\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    render: function render(ctx) {\n      this.clearContextTop();\n      this.callSuper('render', ctx); // clear the cursorOffsetCache, so we ensure to calculate once per renderCursor\n      // the correct position but not at every cursor animation.\n\n      this.cursorOffsetCache = {};\n      this.renderCursorOrSelection();\n    },\n\n    /**\n     * @private\n     * @param {CanvasRenderingContext2D} ctx Context to render on\n     */\n    _render: function _render(ctx) {\n      this.callSuper('_render', ctx);\n    },\n\n    /**\n     * Prepare and clean the contextTop\n     */\n    clearContextTop: function clearContextTop(skipRestore) {\n      if (!this.isEditing || !this.canvas || !this.canvas.contextTop) {\n        return;\n      }\n\n      var ctx = this.canvas.contextTop,\n          v = this.canvas.viewportTransform;\n      ctx.save();\n      ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);\n      this.transform(ctx);\n      this.transformMatrix && ctx.transform.apply(ctx, this.transformMatrix);\n\n      this._clearTextArea(ctx);\n\n      skipRestore || ctx.restore();\n    },\n\n    /**\n     * Renders cursor or selection (depending on what exists)\n     * it does on the contextTop. If contextTop is not available, do nothing.\n     */\n    renderCursorOrSelection: function renderCursorOrSelection() {\n      if (!this.isEditing || !this.canvas || !this.canvas.contextTop) {\n        return;\n      }\n\n      var boundaries = this._getCursorBoundaries(),\n          ctx = this.canvas.contextTop;\n\n      this.clearContextTop(true);\n\n      if (this.selectionStart === this.selectionEnd) {\n        this.renderCursor(boundaries, ctx);\n      } else {\n        this.renderSelection(boundaries, ctx);\n      }\n\n      ctx.restore();\n    },\n    _clearTextArea: function _clearTextArea(ctx) {\n      // we add 4 pixel, to be sure to do not leave any pixel out\n      var width = this.width + 4,\n          height = this.height + 4;\n      ctx.clearRect(-width / 2, -height / 2, width, height);\n    },\n\n    /**\n     * Returns cursor boundaries (left, top, leftOffset, topOffset)\n     * @private\n     * @param {Array} chars Array of characters\n     * @param {String} typeOfBoundaries\n     */\n    _getCursorBoundaries: function _getCursorBoundaries(position) {\n      // left/top are left/top of entire text box\n      // leftOffset/topOffset are offset from that left/top point of a text box\n      if (typeof position === 'undefined') {\n        position = this.selectionStart;\n      }\n\n      var left = this._getLeftOffset(),\n          top = this._getTopOffset(),\n          offsets = this._getCursorBoundariesOffsets(position);\n\n      return {\n        left: left,\n        top: top,\n        leftOffset: offsets.left,\n        topOffset: offsets.top\n      };\n    },\n\n    /**\n     * @private\n     */\n    _getCursorBoundariesOffsets: function _getCursorBoundariesOffsets(position) {\n      if (this.cursorOffsetCache && 'top' in this.cursorOffsetCache) {\n        return this.cursorOffsetCache;\n      }\n\n      var lineLeftOffset,\n          lineIndex,\n          charIndex,\n          topOffset = 0,\n          leftOffset = 0,\n          boundaries,\n          cursorPosition = this.get2DCursorLocation(position);\n      charIndex = cursorPosition.charIndex;\n      lineIndex = cursorPosition.lineIndex;\n\n      for (var i = 0; i < lineIndex; i++) {\n        topOffset += this.getHeightOfLine(i);\n      }\n\n      lineLeftOffset = this._getLineLeftOffset(lineIndex);\n      var bound = this.__charBounds[lineIndex][charIndex];\n      bound && (leftOffset = bound.left);\n\n      if (this.charSpacing !== 0 && charIndex === this._textLines[lineIndex].length) {\n        leftOffset -= this._getWidthOfCharSpacing();\n      }\n\n      boundaries = {\n        top: topOffset,\n        left: lineLeftOffset + (leftOffset > 0 ? leftOffset : 0)\n      };\n      this.cursorOffsetCache = boundaries;\n      return this.cursorOffsetCache;\n    },\n\n    /**\n     * Renders cursor\n     * @param {Object} boundaries\n     * @param {CanvasRenderingContext2D} ctx transformed context to draw on\n     */\n    renderCursor: function renderCursor(boundaries, ctx) {\n      var cursorLocation = this.get2DCursorLocation(),\n          lineIndex = cursorLocation.lineIndex,\n          charIndex = cursorLocation.charIndex > 0 ? cursorLocation.charIndex - 1 : 0,\n          charHeight = this.getValueOfPropertyAt(lineIndex, charIndex, 'fontSize'),\n          multiplier = this.scaleX * this.canvas.getZoom(),\n          cursorWidth = this.cursorWidth / multiplier,\n          topOffset = boundaries.topOffset,\n          dy = this.getValueOfPropertyAt(lineIndex, charIndex, 'deltaY');\n      topOffset += (1 - this._fontSizeFraction) * this.getHeightOfLine(lineIndex) / this.lineHeight - charHeight * (1 - this._fontSizeFraction);\n\n      if (this.inCompositionMode) {\n        this.renderSelection(boundaries, ctx);\n      }\n\n      ctx.fillStyle = this.getValueOfPropertyAt(lineIndex, charIndex, 'fill');\n      ctx.globalAlpha = this.__isMousedown ? 1 : this._currentCursorOpacity;\n      ctx.fillRect(boundaries.left + boundaries.leftOffset - cursorWidth / 2, topOffset + boundaries.top + dy, cursorWidth, charHeight);\n    },\n\n    /**\n     * Renders text selection\n     * @param {Object} boundaries Object with left/top/leftOffset/topOffset\n     * @param {CanvasRenderingContext2D} ctx transformed context to draw on\n     */\n    renderSelection: function renderSelection(boundaries, ctx) {\n      var selectionStart = this.inCompositionMode ? this.hiddenTextarea.selectionStart : this.selectionStart,\n          selectionEnd = this.inCompositionMode ? this.hiddenTextarea.selectionEnd : this.selectionEnd,\n          isJustify = this.textAlign.indexOf('justify') !== -1,\n          start = this.get2DCursorLocation(selectionStart),\n          end = this.get2DCursorLocation(selectionEnd),\n          startLine = start.lineIndex,\n          endLine = end.lineIndex,\n          startChar = start.charIndex < 0 ? 0 : start.charIndex,\n          endChar = end.charIndex < 0 ? 0 : end.charIndex;\n\n      for (var i = startLine; i <= endLine; i++) {\n        var lineOffset = this._getLineLeftOffset(i) || 0,\n            lineHeight = this.getHeightOfLine(i),\n            realLineHeight = 0,\n            boxStart = 0,\n            boxEnd = 0;\n\n        if (i === startLine) {\n          boxStart = this.__charBounds[startLine][startChar].left;\n        }\n\n        if (i >= startLine && i < endLine) {\n          boxEnd = isJustify && !this.isEndOfWrapping(i) ? this.width : this.getLineWidth(i) || 5; // WTF is this 5?\n        } else if (i === endLine) {\n          if (endChar === 0) {\n            boxEnd = this.__charBounds[endLine][endChar].left;\n          } else {\n            var charSpacing = this._getWidthOfCharSpacing();\n\n            boxEnd = this.__charBounds[endLine][endChar - 1].left + this.__charBounds[endLine][endChar - 1].width - charSpacing;\n          }\n        }\n\n        realLineHeight = lineHeight;\n\n        if (this.lineHeight < 1 || i === endLine && this.lineHeight > 1) {\n          lineHeight /= this.lineHeight;\n        }\n\n        if (this.inCompositionMode) {\n          ctx.fillStyle = this.compositionColor || 'black';\n          ctx.fillRect(boundaries.left + lineOffset + boxStart, boundaries.top + boundaries.topOffset + lineHeight, boxEnd - boxStart, 1);\n        } else {\n          ctx.fillStyle = this.selectionColor;\n          ctx.fillRect(boundaries.left + lineOffset + boxStart, boundaries.top + boundaries.topOffset, boxEnd - boxStart, lineHeight);\n        }\n\n        boundaries.topOffset += realLineHeight;\n      }\n    },\n\n    /**\n     * High level function to know the height of the cursor.\n     * the currentChar is the one that precedes the cursor\n     * Returns fontSize of char at the current cursor\n     * @return {Number} Character font size\n     */\n    getCurrentCharFontSize: function getCurrentCharFontSize() {\n      var cp = this._getCurrentCharIndex();\n\n      return this.getValueOfPropertyAt(cp.l, cp.c, 'fontSize');\n    },\n\n    /**\n     * High level function to know the color of the cursor.\n     * the currentChar is the one that precedes the cursor\n     * Returns color (fill) of char at the current cursor\n     * @return {String} Character color (fill)\n     */\n    getCurrentCharColor: function getCurrentCharColor() {\n      var cp = this._getCurrentCharIndex();\n\n      return this.getValueOfPropertyAt(cp.l, cp.c, 'fill');\n    },\n\n    /**\n     * Returns the cursor position for the getCurrent.. functions\n     * @private\n     */\n    _getCurrentCharIndex: function _getCurrentCharIndex() {\n      var cursorPosition = this.get2DCursorLocation(this.selectionStart, true),\n          charIndex = cursorPosition.charIndex > 0 ? cursorPosition.charIndex - 1 : 0;\n      return {\n        l: cursorPosition.lineIndex,\n        c: charIndex\n      };\n    }\n  });\n  /**\n   * Returns fabric.IText instance from an object representation\n   * @static\n   * @memberOf fabric.IText\n   * @param {Object} object Object to create an instance from\n   * @param {function} [callback] invoked with new instance as argument\n   */\n\n  fabric.IText.fromObject = function (object, callback) {\n    parseDecoration(object);\n\n    if (object.styles) {\n      for (var i in object.styles) {\n        for (var j in object.styles[i]) {\n          parseDecoration(object.styles[i][j]);\n        }\n      }\n    }\n\n    fabric.Object._fromObject('IText', object, callback, 'text');\n  };\n})();\n\n(function () {\n  var clone = fabric.util.object.clone;\n  fabric.util.object.extend(fabric.IText.prototype,\n  /** @lends fabric.IText.prototype */\n  {\n    /**\n     * Initializes all the interactive behavior of IText\n     */\n    initBehavior: function initBehavior() {\n      this.initAddedHandler();\n      this.initRemovedHandler();\n      this.initCursorSelectionHandlers();\n      this.initDoubleClickSimulation();\n      this.mouseMoveHandler = this.mouseMoveHandler.bind(this);\n    },\n    onDeselect: function onDeselect() {\n      this.isEditing && this.exitEditing();\n      this.selected = false;\n    },\n\n    /**\n     * Initializes \"added\" event handler\n     */\n    initAddedHandler: function initAddedHandler() {\n      var _this = this;\n\n      this.on('added', function () {\n        var canvas = _this.canvas;\n\n        if (canvas) {\n          if (!canvas._hasITextHandlers) {\n            canvas._hasITextHandlers = true;\n\n            _this._initCanvasHandlers(canvas);\n          }\n\n          canvas._iTextInstances = canvas._iTextInstances || [];\n\n          canvas._iTextInstances.push(_this);\n        }\n      });\n    },\n    initRemovedHandler: function initRemovedHandler() {\n      var _this = this;\n\n      this.on('removed', function () {\n        var canvas = _this.canvas;\n\n        if (canvas) {\n          canvas._iTextInstances = canvas._iTextInstances || [];\n          fabric.util.removeFromArray(canvas._iTextInstances, _this);\n\n          if (canvas._iTextInstances.length === 0) {\n            canvas._hasITextHandlers = false;\n\n            _this._removeCanvasHandlers(canvas);\n          }\n        }\n      });\n    },\n\n    /**\n     * register canvas event to manage exiting on other instances\n     * @private\n     */\n    _initCanvasHandlers: function _initCanvasHandlers(canvas) {\n      canvas._mouseUpITextHandler = function () {\n        if (canvas._iTextInstances) {\n          canvas._iTextInstances.forEach(function (obj) {\n            obj.__isMousedown = false;\n          });\n        }\n      };\n\n      canvas.on('mouse:up', canvas._mouseUpITextHandler);\n    },\n\n    /**\n     * remove canvas event to manage exiting on other instances\n     * @private\n     */\n    _removeCanvasHandlers: function _removeCanvasHandlers(canvas) {\n      canvas.off('mouse:up', canvas._mouseUpITextHandler);\n    },\n\n    /**\n     * @private\n     */\n    _tick: function _tick() {\n      this._currentTickState = this._animateCursor(this, 1, this.cursorDuration, '_onTickComplete');\n    },\n\n    /**\n     * @private\n     */\n    _animateCursor: function _animateCursor(obj, targetOpacity, duration, completeMethod) {\n      var tickState;\n      tickState = {\n        isAborted: false,\n        abort: function abort() {\n          this.isAborted = true;\n        }\n      };\n      obj.animate('_currentCursorOpacity', targetOpacity, {\n        duration: duration,\n        onComplete: function onComplete() {\n          if (!tickState.isAborted) {\n            obj[completeMethod]();\n          }\n        },\n        onChange: function onChange() {\n          // we do not want to animate a selection, only cursor\n          if (obj.canvas && obj.selectionStart === obj.selectionEnd) {\n            obj.renderCursorOrSelection();\n          }\n        },\n        abort: function abort() {\n          return tickState.isAborted;\n        }\n      });\n      return tickState;\n    },\n\n    /**\n     * @private\n     */\n    _onTickComplete: function _onTickComplete() {\n      var _this = this;\n\n      if (this._cursorTimeout1) {\n        clearTimeout(this._cursorTimeout1);\n      }\n\n      this._cursorTimeout1 = setTimeout(function () {\n        _this._currentTickCompleteState = _this._animateCursor(_this, 0, this.cursorDuration / 2, '_tick');\n      }, 100);\n    },\n\n    /**\n     * Initializes delayed cursor\n     */\n    initDelayedCursor: function initDelayedCursor(restart) {\n      var _this = this,\n          delay = restart ? 0 : this.cursorDelay;\n\n      this.abortCursorAnimation();\n      this._currentCursorOpacity = 1;\n      this._cursorTimeout2 = setTimeout(function () {\n        _this._tick();\n      }, delay);\n    },\n\n    /**\n     * Aborts cursor animation and clears all timeouts\n     */\n    abortCursorAnimation: function abortCursorAnimation() {\n      var shouldClear = this._currentTickState || this._currentTickCompleteState,\n          canvas = this.canvas;\n      this._currentTickState && this._currentTickState.abort();\n      this._currentTickCompleteState && this._currentTickCompleteState.abort();\n      clearTimeout(this._cursorTimeout1);\n      clearTimeout(this._cursorTimeout2);\n      this._currentCursorOpacity = 0; // to clear just itext area we need to transform the context\n      // it may not be worth it\n\n      if (shouldClear && canvas) {\n        canvas.clearContext(canvas.contextTop || canvas.contextContainer);\n      }\n    },\n\n    /**\n     * Selects entire text\n     * @return {fabric.IText} thisArg\n     * @chainable\n     */\n    selectAll: function selectAll() {\n      this.selectionStart = 0;\n      this.selectionEnd = this._text.length;\n\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n\n      return this;\n    },\n\n    /**\n     * Returns selected text\n     * @return {String}\n     */\n    getSelectedText: function getSelectedText() {\n      return this._text.slice(this.selectionStart, this.selectionEnd).join('');\n    },\n\n    /**\n     * Find new selection index representing start of current word according to current selection index\n     * @param {Number} startFrom Current selection index\n     * @return {Number} New selection index\n     */\n    findWordBoundaryLeft: function findWordBoundaryLeft(startFrom) {\n      var offset = 0,\n          index = startFrom - 1; // remove space before cursor first\n\n      if (this._reSpace.test(this._text[index])) {\n        while (this._reSpace.test(this._text[index])) {\n          offset++;\n          index--;\n        }\n      }\n\n      while (/\\S/.test(this._text[index]) && index > -1) {\n        offset++;\n        index--;\n      }\n\n      return startFrom - offset;\n    },\n\n    /**\n     * Find new selection index representing end of current word according to current selection index\n     * @param {Number} startFrom Current selection index\n     * @return {Number} New selection index\n     */\n    findWordBoundaryRight: function findWordBoundaryRight(startFrom) {\n      var offset = 0,\n          index = startFrom; // remove space after cursor first\n\n      if (this._reSpace.test(this._text[index])) {\n        while (this._reSpace.test(this._text[index])) {\n          offset++;\n          index++;\n        }\n      }\n\n      while (/\\S/.test(this._text[index]) && index < this._text.length) {\n        offset++;\n        index++;\n      }\n\n      return startFrom + offset;\n    },\n\n    /**\n     * Find new selection index representing start of current line according to current selection index\n     * @param {Number} startFrom Current selection index\n     * @return {Number} New selection index\n     */\n    findLineBoundaryLeft: function findLineBoundaryLeft(startFrom) {\n      var offset = 0,\n          index = startFrom - 1;\n\n      while (!/\\n/.test(this._text[index]) && index > -1) {\n        offset++;\n        index--;\n      }\n\n      return startFrom - offset;\n    },\n\n    /**\n     * Find new selection index representing end of current line according to current selection index\n     * @param {Number} startFrom Current selection index\n     * @return {Number} New selection index\n     */\n    findLineBoundaryRight: function findLineBoundaryRight(startFrom) {\n      var offset = 0,\n          index = startFrom;\n\n      while (!/\\n/.test(this._text[index]) && index < this._text.length) {\n        offset++;\n        index++;\n      }\n\n      return startFrom + offset;\n    },\n\n    /**\n     * Finds index corresponding to beginning or end of a word\n     * @param {Number} selectionStart Index of a character\n     * @param {Number} direction 1 or -1\n     * @return {Number} Index of the beginning or end of a word\n     */\n    searchWordBoundary: function searchWordBoundary(selectionStart, direction) {\n      var text = this._text,\n          index = this._reSpace.test(text[selectionStart]) ? selectionStart - 1 : selectionStart,\n          _char = text[index],\n          // wrong\n      reNonWord = fabric.reNonWord;\n\n      while (!reNonWord.test(_char) && index > 0 && index < text.length) {\n        index += direction;\n        _char = text[index];\n      }\n\n      if (reNonWord.test(_char)) {\n        index += direction === 1 ? 0 : 1;\n      }\n\n      return index;\n    },\n\n    /**\n     * Selects a word based on the index\n     * @param {Number} selectionStart Index of a character\n     */\n    selectWord: function selectWord(selectionStart) {\n      selectionStart = selectionStart || this.selectionStart;\n      var newSelectionStart = this.searchWordBoundary(selectionStart, -1),\n\n      /* search backwards */\n      newSelectionEnd = this.searchWordBoundary(selectionStart, 1);\n      /* search forward */\n\n      this.selectionStart = newSelectionStart;\n      this.selectionEnd = newSelectionEnd;\n\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n\n      this.renderCursorOrSelection();\n    },\n\n    /**\n     * Selects a line based on the index\n     * @param {Number} selectionStart Index of a character\n     * @return {fabric.IText} thisArg\n     * @chainable\n     */\n    selectLine: function selectLine(selectionStart) {\n      selectionStart = selectionStart || this.selectionStart;\n      var newSelectionStart = this.findLineBoundaryLeft(selectionStart),\n          newSelectionEnd = this.findLineBoundaryRight(selectionStart);\n      this.selectionStart = newSelectionStart;\n      this.selectionEnd = newSelectionEnd;\n\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n\n      return this;\n    },\n\n    /**\n     * Enters editing state\n     * @return {fabric.IText} thisArg\n     * @chainable\n     */\n    enterEditing: function enterEditing(e) {\n      if (this.isEditing || !this.editable) {\n        return;\n      }\n\n      if (this.canvas) {\n        this.canvas.calcOffset();\n        this.exitEditingOnOthers(this.canvas);\n      }\n\n      this.isEditing = true;\n      this.initHiddenTextarea(e);\n      this.hiddenTextarea.focus();\n      this.hiddenTextarea.value = this.text;\n\n      this._updateTextarea();\n\n      this._saveEditingProps();\n\n      this._setEditingProps();\n\n      this._textBeforeEdit = this.text;\n\n      this._tick();\n\n      this.fire('editing:entered');\n\n      this._fireSelectionChanged();\n\n      if (!this.canvas) {\n        return this;\n      }\n\n      this.canvas.fire('text:editing:entered', {\n        target: this\n      });\n      this.initMouseMoveHandler();\n      this.canvas.requestRenderAll();\n      return this;\n    },\n    exitEditingOnOthers: function exitEditingOnOthers(canvas) {\n      if (canvas._iTextInstances) {\n        canvas._iTextInstances.forEach(function (obj) {\n          obj.selected = false;\n\n          if (obj.isEditing) {\n            obj.exitEditing();\n          }\n        });\n      }\n    },\n\n    /**\n     * Initializes \"mousemove\" event handler\n     */\n    initMouseMoveHandler: function initMouseMoveHandler() {\n      this.canvas.on('mouse:move', this.mouseMoveHandler);\n    },\n\n    /**\n     * @private\n     */\n    mouseMoveHandler: function mouseMoveHandler(options) {\n      if (!this.__isMousedown || !this.isEditing) {\n        return;\n      }\n\n      var newSelectionStart = this.getSelectionStartFromPointer(options.e),\n          currentStart = this.selectionStart,\n          currentEnd = this.selectionEnd;\n\n      if ((newSelectionStart !== this.__selectionStartOnMouseDown || currentStart === currentEnd) && (currentStart === newSelectionStart || currentEnd === newSelectionStart)) {\n        return;\n      }\n\n      if (newSelectionStart > this.__selectionStartOnMouseDown) {\n        this.selectionStart = this.__selectionStartOnMouseDown;\n        this.selectionEnd = newSelectionStart;\n      } else {\n        this.selectionStart = newSelectionStart;\n        this.selectionEnd = this.__selectionStartOnMouseDown;\n      }\n\n      if (this.selectionStart !== currentStart || this.selectionEnd !== currentEnd) {\n        this.restartCursorIfNeeded();\n\n        this._fireSelectionChanged();\n\n        this._updateTextarea();\n\n        this.renderCursorOrSelection();\n      }\n    },\n\n    /**\n     * @private\n     */\n    _setEditingProps: function _setEditingProps() {\n      this.hoverCursor = 'text';\n\n      if (this.canvas) {\n        this.canvas.defaultCursor = this.canvas.moveCursor = 'text';\n      }\n\n      this.borderColor = this.editingBorderColor;\n      this.hasControls = this.selectable = false;\n      this.lockMovementX = this.lockMovementY = true;\n    },\n\n    /**\n     * convert from textarea to grapheme indexes\n     */\n    fromStringToGraphemeSelection: function fromStringToGraphemeSelection(start, end, text) {\n      var smallerTextStart = text.slice(0, start),\n          graphemeStart = fabric.util.string.graphemeSplit(smallerTextStart).length;\n\n      if (start === end) {\n        return {\n          selectionStart: graphemeStart,\n          selectionEnd: graphemeStart\n        };\n      }\n\n      var smallerTextEnd = text.slice(start, end),\n          graphemeEnd = fabric.util.string.graphemeSplit(smallerTextEnd).length;\n      return {\n        selectionStart: graphemeStart,\n        selectionEnd: graphemeStart + graphemeEnd\n      };\n    },\n\n    /**\n     * convert from fabric to textarea values\n     */\n    fromGraphemeToStringSelection: function fromGraphemeToStringSelection(start, end, _text) {\n      var smallerTextStart = _text.slice(0, start),\n          graphemeStart = smallerTextStart.join('').length;\n\n      if (start === end) {\n        return {\n          selectionStart: graphemeStart,\n          selectionEnd: graphemeStart\n        };\n      }\n\n      var smallerTextEnd = _text.slice(start, end),\n          graphemeEnd = smallerTextEnd.join('').length;\n\n      return {\n        selectionStart: graphemeStart,\n        selectionEnd: graphemeStart + graphemeEnd\n      };\n    },\n\n    /**\n     * @private\n     */\n    _updateTextarea: function _updateTextarea() {\n      this.cursorOffsetCache = {};\n\n      if (!this.hiddenTextarea) {\n        return;\n      }\n\n      if (!this.inCompositionMode) {\n        var newSelection = this.fromGraphemeToStringSelection(this.selectionStart, this.selectionEnd, this._text);\n        this.hiddenTextarea.selectionStart = newSelection.selectionStart;\n        this.hiddenTextarea.selectionEnd = newSelection.selectionEnd;\n      }\n\n      this.updateTextareaPosition();\n    },\n\n    /**\n     * @private\n     */\n    updateFromTextArea: function updateFromTextArea() {\n      if (!this.hiddenTextarea) {\n        return;\n      }\n\n      this.cursorOffsetCache = {};\n      this.text = this.hiddenTextarea.value;\n\n      if (this._shouldClearDimensionCache()) {\n        this.initDimensions();\n        this.setCoords();\n      }\n\n      var newSelection = this.fromStringToGraphemeSelection(this.hiddenTextarea.selectionStart, this.hiddenTextarea.selectionEnd, this.hiddenTextarea.value);\n      this.selectionEnd = this.selectionStart = newSelection.selectionEnd;\n\n      if (!this.inCompositionMode) {\n        this.selectionStart = newSelection.selectionStart;\n      }\n\n      this.updateTextareaPosition();\n    },\n\n    /**\n     * @private\n     */\n    updateTextareaPosition: function updateTextareaPosition() {\n      if (this.selectionStart === this.selectionEnd) {\n        var style = this._calcTextareaPosition();\n\n        this.hiddenTextarea.style.left = style.left;\n        this.hiddenTextarea.style.top = style.top;\n      }\n    },\n\n    /**\n     * @private\n     * @return {Object} style contains style for hiddenTextarea\n     */\n    _calcTextareaPosition: function _calcTextareaPosition() {\n      if (!this.canvas) {\n        return {\n          x: 1,\n          y: 1\n        };\n      }\n\n      var desiredPosition = this.inCompositionMode ? this.compositionStart : this.selectionStart,\n          boundaries = this._getCursorBoundaries(desiredPosition),\n          cursorLocation = this.get2DCursorLocation(desiredPosition),\n          lineIndex = cursorLocation.lineIndex,\n          charIndex = cursorLocation.charIndex,\n          charHeight = this.getValueOfPropertyAt(lineIndex, charIndex, 'fontSize') * this.lineHeight,\n          leftOffset = boundaries.leftOffset,\n          m = this.calcTransformMatrix(),\n          p = {\n        x: boundaries.left + leftOffset,\n        y: boundaries.top + boundaries.topOffset + charHeight\n      },\n          retinaScaling = this.canvas.getRetinaScaling(),\n          upperCanvas = this.canvas.upperCanvasEl,\n          upperCanvasWidth = upperCanvas.width / retinaScaling,\n          upperCanvasHeight = upperCanvas.height / retinaScaling,\n          maxWidth = upperCanvasWidth - charHeight,\n          maxHeight = upperCanvasHeight - charHeight,\n          scaleX = upperCanvas.clientWidth / upperCanvasWidth,\n          scaleY = upperCanvas.clientHeight / upperCanvasHeight;\n\n      p = fabric.util.transformPoint(p, m);\n      p = fabric.util.transformPoint(p, this.canvas.viewportTransform);\n      p.x *= scaleX;\n      p.y *= scaleY;\n\n      if (p.x < 0) {\n        p.x = 0;\n      }\n\n      if (p.x > maxWidth) {\n        p.x = maxWidth;\n      }\n\n      if (p.y < 0) {\n        p.y = 0;\n      }\n\n      if (p.y > maxHeight) {\n        p.y = maxHeight;\n      } // Don't add canvas offset to the document since we are overriding standard behavior\n      // and placing the textrea within the container rather than at the end of the document\n      // p.x += this.canvas._offset.left;\n      // p.y += this.canvas._offset.top;\n\n\n      return {\n        left: p.x + 'px',\n        top: p.y + 'px',\n        fontSize: charHeight + 'px',\n        charHeight: charHeight\n      };\n    },\n\n    /**\n     * @private\n     */\n    _saveEditingProps: function _saveEditingProps() {\n      this._savedProps = {\n        hasControls: this.hasControls,\n        borderColor: this.borderColor,\n        lockMovementX: this.lockMovementX,\n        lockMovementY: this.lockMovementY,\n        hoverCursor: this.hoverCursor,\n        selectable: this.selectable,\n        defaultCursor: this.canvas && this.canvas.defaultCursor,\n        moveCursor: this.canvas && this.canvas.moveCursor\n      };\n    },\n\n    /**\n     * @private\n     */\n    _restoreEditingProps: function _restoreEditingProps() {\n      if (!this._savedProps) {\n        return;\n      }\n\n      this.hoverCursor = this._savedProps.hoverCursor;\n      this.hasControls = this._savedProps.hasControls;\n      this.borderColor = this._savedProps.borderColor;\n      this.selectable = this._savedProps.selectable;\n      this.lockMovementX = this._savedProps.lockMovementX;\n      this.lockMovementY = this._savedProps.lockMovementY;\n\n      if (this.canvas) {\n        this.canvas.defaultCursor = this._savedProps.defaultCursor;\n        this.canvas.moveCursor = this._savedProps.moveCursor;\n      }\n    },\n\n    /**\n     * Exits from editing state\n     * @return {fabric.IText} thisArg\n     * @chainable\n     */\n    exitEditing: function exitEditing() {\n      var isTextChanged = this._textBeforeEdit !== this.text;\n      var hiddenTextarea = this.hiddenTextarea;\n      this.selected = false;\n      this.isEditing = false;\n      this.selectionEnd = this.selectionStart;\n\n      if (hiddenTextarea) {\n        hiddenTextarea.blur && hiddenTextarea.blur();\n        hiddenTextarea.parentNode && hiddenTextarea.parentNode.removeChild(hiddenTextarea);\n      }\n\n      this.hiddenTextarea = null;\n      this.abortCursorAnimation();\n\n      this._restoreEditingProps();\n\n      this._currentCursorOpacity = 0;\n\n      if (this._shouldClearDimensionCache()) {\n        this.initDimensions();\n        this.setCoords();\n      }\n\n      this.fire('editing:exited');\n      isTextChanged && this.fire('modified');\n\n      if (this.canvas) {\n        this.canvas.off('mouse:move', this.mouseMoveHandler);\n        this.canvas.fire('text:editing:exited', {\n          target: this\n        });\n        isTextChanged && this.canvas.fire('object:modified', {\n          target: this\n        });\n      }\n\n      return this;\n    },\n\n    /**\n     * @private\n     */\n    _removeExtraneousStyles: function _removeExtraneousStyles() {\n      for (var prop in this.styles) {\n        if (!this._textLines[prop]) {\n          delete this.styles[prop];\n        }\n      }\n    },\n\n    /**\n     * remove and reflow a style block from start to end.\n     * @param {Number} start linear start position for removal (included in removal)\n     * @param {Number} end linear end position for removal ( excluded from removal )\n     */\n    removeStyleFromTo: function removeStyleFromTo(start, end) {\n      var cursorStart = this.get2DCursorLocation(start, true),\n          cursorEnd = this.get2DCursorLocation(end, true),\n          lineStart = cursorStart.lineIndex,\n          charStart = cursorStart.charIndex,\n          lineEnd = cursorEnd.lineIndex,\n          charEnd = cursorEnd.charIndex,\n          i,\n          styleObj;\n\n      if (lineStart !== lineEnd) {\n        // step1 remove the trailing of lineStart\n        if (this.styles[lineStart]) {\n          for (i = charStart; i < this._unwrappedTextLines[lineStart].length; i++) {\n            delete this.styles[lineStart][i];\n          }\n        } // step2 move the trailing of lineEnd to lineStart if needed\n\n\n        if (this.styles[lineEnd]) {\n          for (i = charEnd; i < this._unwrappedTextLines[lineEnd].length; i++) {\n            styleObj = this.styles[lineEnd][i];\n\n            if (styleObj) {\n              this.styles[lineStart] || (this.styles[lineStart] = {});\n              this.styles[lineStart][charStart + i - charEnd] = styleObj;\n            }\n          }\n        } // step3 detects lines will be completely removed.\n\n\n        for (i = lineStart + 1; i <= lineEnd; i++) {\n          delete this.styles[i];\n        } // step4 shift remaining lines.\n\n\n        this.shiftLineStyles(lineEnd, lineStart - lineEnd);\n      } else {\n        // remove and shift left on the same line\n        if (this.styles[lineStart]) {\n          styleObj = this.styles[lineStart];\n\n          var diff = charEnd - charStart,\n              numericChar,\n              _char;\n\n          for (i = charStart; i < charEnd; i++) {\n            delete styleObj[i];\n          }\n\n          for (_char in this.styles[lineStart]) {\n            numericChar = parseInt(_char, 10);\n\n            if (numericChar >= charEnd) {\n              styleObj[numericChar - diff] = styleObj[_char];\n              delete styleObj[_char];\n            }\n          }\n        }\n      }\n    },\n\n    /**\n     * Shifts line styles up or down\n     * @param {Number} lineIndex Index of a line\n     * @param {Number} offset Can any number?\n     */\n    shiftLineStyles: function shiftLineStyles(lineIndex, offset) {\n      // shift all line styles by offset upward or downward\n      // do not clone deep. we need new array, not new style objects\n      var clonedStyles = clone(this.styles);\n\n      for (var line in this.styles) {\n        var numericLine = parseInt(line, 10);\n\n        if (numericLine > lineIndex) {\n          this.styles[numericLine + offset] = clonedStyles[numericLine];\n\n          if (!clonedStyles[numericLine - offset]) {\n            delete this.styles[numericLine];\n          }\n        }\n      }\n    },\n    restartCursorIfNeeded: function restartCursorIfNeeded() {\n      if (!this._currentTickState || this._currentTickState.isAborted || !this._currentTickCompleteState || this._currentTickCompleteState.isAborted) {\n        this.initDelayedCursor();\n      }\n    },\n\n    /**\n     * Inserts new style object\n     * @param {Number} lineIndex Index of a line\n     * @param {Number} charIndex Index of a char\n     * @param {Number} qty number of lines to add\n     * @param {Array} copiedStyle Array of objects styles\n     */\n    insertNewlineStyleObject: function insertNewlineStyleObject(lineIndex, charIndex, qty, copiedStyle) {\n      var currentCharStyle,\n          newLineStyles = {},\n          somethingAdded = false;\n      qty || (qty = 1);\n      this.shiftLineStyles(lineIndex, qty);\n\n      if (this.styles[lineIndex]) {\n        currentCharStyle = this.styles[lineIndex][charIndex === 0 ? charIndex : charIndex - 1];\n      } // we clone styles of all chars\n      // after cursor onto the current line\n\n\n      for (var index in this.styles[lineIndex]) {\n        var numIndex = parseInt(index, 10);\n\n        if (numIndex >= charIndex) {\n          somethingAdded = true;\n          newLineStyles[numIndex - charIndex] = this.styles[lineIndex][index]; // remove lines from the previous line since they're on a new line now\n\n          delete this.styles[lineIndex][index];\n        }\n      }\n\n      if (somethingAdded) {\n        this.styles[lineIndex + qty] = newLineStyles;\n      } else {\n        delete this.styles[lineIndex + qty];\n      } // for the other lines\n      // we clone current char style onto the next (otherwise empty) line\n\n\n      while (qty > 1) {\n        qty--;\n\n        if (copiedStyle && copiedStyle[qty]) {\n          this.styles[lineIndex + qty] = {\n            0: clone(copiedStyle[qty])\n          };\n        } else if (currentCharStyle) {\n          this.styles[lineIndex + qty] = {\n            0: clone(currentCharStyle)\n          };\n        } else {\n          delete this.styles[lineIndex + qty];\n        }\n      }\n\n      this._forceClearCache = true;\n    },\n\n    /**\n     * Inserts style object for a given line/char index\n     * @param {Number} lineIndex Index of a line\n     * @param {Number} charIndex Index of a char\n     * @param {Number} quantity number Style object to insert, if given\n     * @param {Array} copiedStyle array of style objects\n     */\n    insertCharStyleObject: function insertCharStyleObject(lineIndex, charIndex, quantity, copiedStyle) {\n      if (!this.styles) {\n        this.styles = {};\n      }\n\n      var currentLineStyles = this.styles[lineIndex],\n          currentLineStylesCloned = currentLineStyles ? clone(currentLineStyles) : {};\n      quantity || (quantity = 1); // shift all char styles by quantity forward\n      // 0,1,2,3 -> (charIndex=2) -> 0,1,3,4 -> (insert 2) -> 0,1,2,3,4\n\n      for (var index in currentLineStylesCloned) {\n        var numericIndex = parseInt(index, 10);\n\n        if (numericIndex >= charIndex) {\n          currentLineStyles[numericIndex + quantity] = currentLineStylesCloned[numericIndex]; // only delete the style if there was nothing moved there\n\n          if (!currentLineStylesCloned[numericIndex - quantity]) {\n            delete currentLineStyles[numericIndex];\n          }\n        }\n      }\n\n      this._forceClearCache = true;\n\n      if (copiedStyle) {\n        while (quantity--) {\n          if (!Object.keys(copiedStyle[quantity]).length) {\n            continue;\n          }\n\n          if (!this.styles[lineIndex]) {\n            this.styles[lineIndex] = {};\n          }\n\n          this.styles[lineIndex][charIndex + quantity] = clone(copiedStyle[quantity]);\n        }\n\n        return;\n      }\n\n      if (!currentLineStyles) {\n        return;\n      }\n\n      var newStyle = currentLineStyles[charIndex ? charIndex - 1 : 1];\n\n      while (newStyle && quantity--) {\n        this.styles[lineIndex][charIndex + quantity] = clone(newStyle);\n      }\n    },\n\n    /**\n     * Inserts style object(s)\n     * @param {Array} insertedText Characters at the location where style is inserted\n     * @param {Number} start cursor index for inserting style\n     * @param {Array} [copiedStyle] array of style objects to insert.\n     */\n    insertNewStyleBlock: function insertNewStyleBlock(insertedText, start, copiedStyle) {\n      var cursorLoc = this.get2DCursorLocation(start, true),\n          addedLines = [0],\n          linesLength = 0;\n\n      for (var i = 0; i < insertedText.length; i++) {\n        if (insertedText[i] === '\\n') {\n          linesLength++;\n          addedLines[linesLength] = 0;\n        } else {\n          addedLines[linesLength]++;\n        }\n      }\n\n      if (addedLines[0] > 0) {\n        this.insertCharStyleObject(cursorLoc.lineIndex, cursorLoc.charIndex, addedLines[0], copiedStyle);\n        copiedStyle = copiedStyle && copiedStyle.slice(addedLines[0] + 1);\n      }\n\n      linesLength && this.insertNewlineStyleObject(cursorLoc.lineIndex, cursorLoc.charIndex + addedLines[0], linesLength);\n\n      for (var i = 1; i < linesLength; i++) {\n        if (addedLines[i] > 0) {\n          this.insertCharStyleObject(cursorLoc.lineIndex + i, 0, addedLines[i], copiedStyle);\n        } else if (copiedStyle) {\n          this.styles[cursorLoc.lineIndex + i][0] = copiedStyle[0];\n        }\n\n        copiedStyle = copiedStyle && copiedStyle.slice(addedLines[i] + 1);\n      } // we use i outside the loop to get it like linesLength\n\n\n      if (addedLines[i] > 0) {\n        this.insertCharStyleObject(cursorLoc.lineIndex + i, 0, addedLines[i], copiedStyle);\n      }\n    },\n\n    /**\n     * Set the selectionStart and selectionEnd according to the new position of cursor\n     * mimic the key - mouse navigation when shift is pressed.\n     */\n    setSelectionStartEndWithShift: function setSelectionStartEndWithShift(start, end, newSelection) {\n      if (newSelection <= start) {\n        if (end === start) {\n          this._selectionDirection = 'left';\n        } else if (this._selectionDirection === 'right') {\n          this._selectionDirection = 'left';\n          this.selectionEnd = start;\n        }\n\n        this.selectionStart = newSelection;\n      } else if (newSelection > start && newSelection < end) {\n        if (this._selectionDirection === 'right') {\n          this.selectionEnd = newSelection;\n        } else {\n          this.selectionStart = newSelection;\n        }\n      } else {\n        // newSelection is > selection start and end\n        if (end === start) {\n          this._selectionDirection = 'right';\n        } else if (this._selectionDirection === 'left') {\n          this._selectionDirection = 'right';\n          this.selectionStart = end;\n        }\n\n        this.selectionEnd = newSelection;\n      }\n    },\n    setSelectionInBoundaries: function setSelectionInBoundaries() {\n      var length = this.text.length;\n\n      if (this.selectionStart > length) {\n        this.selectionStart = length;\n      } else if (this.selectionStart < 0) {\n        this.selectionStart = 0;\n      }\n\n      if (this.selectionEnd > length) {\n        this.selectionEnd = length;\n      } else if (this.selectionEnd < 0) {\n        this.selectionEnd = 0;\n      }\n    }\n  });\n})();\n\nfabric.util.object.extend(fabric.IText.prototype,\n/** @lends fabric.IText.prototype */\n{\n  /**\n   * Initializes \"dbclick\" event handler\n   */\n  initDoubleClickSimulation: function initDoubleClickSimulation() {\n    // for double click\n    this.__lastClickTime = +new Date(); // for triple click\n\n    this.__lastLastClickTime = +new Date();\n    this.__lastPointer = {};\n    this.on('mousedown', this.onMouseDown);\n  },\n\n  /**\n   * Default event handler to simulate triple click\n   * @private\n   */\n  onMouseDown: function onMouseDown(options) {\n    if (!this.canvas) {\n      return;\n    }\n\n    this.__newClickTime = +new Date();\n    var newPointer = options.pointer;\n\n    if (this.isTripleClick(newPointer)) {\n      this.fire('tripleclick', options);\n\n      this._stopEvent(options.e);\n    }\n\n    this.__lastLastClickTime = this.__lastClickTime;\n    this.__lastClickTime = this.__newClickTime;\n    this.__lastPointer = newPointer;\n    this.__lastIsEditing = this.isEditing;\n    this.__lastSelected = this.selected;\n  },\n  isTripleClick: function isTripleClick(newPointer) {\n    return this.__newClickTime - this.__lastClickTime < 500 && this.__lastClickTime - this.__lastLastClickTime < 500 && this.__lastPointer.x === newPointer.x && this.__lastPointer.y === newPointer.y;\n  },\n\n  /**\n   * @private\n   */\n  _stopEvent: function _stopEvent(e) {\n    e.preventDefault && e.preventDefault();\n    e.stopPropagation && e.stopPropagation();\n  },\n\n  /**\n   * Initializes event handlers related to cursor or selection\n   */\n  initCursorSelectionHandlers: function initCursorSelectionHandlers() {\n    this.initMousedownHandler();\n    this.initMouseupHandler();\n    this.initClicks();\n  },\n\n  /**\n   * Default handler for double click, select a word\n   */\n  doubleClickHandler: function doubleClickHandler(options) {\n    if (!this.isEditing) {\n      return;\n    }\n\n    this.selectWord(this.getSelectionStartFromPointer(options.e));\n  },\n\n  /**\n   * Default handler for triple click, select a line\n   */\n  tripleClickHandler: function tripleClickHandler(options) {\n    if (!this.isEditing) {\n      return;\n    }\n\n    this.selectLine(this.getSelectionStartFromPointer(options.e));\n  },\n\n  /**\n   * Initializes double and triple click event handlers\n   */\n  initClicks: function initClicks() {\n    this.on('mousedblclick', this.doubleClickHandler);\n    this.on('tripleclick', this.tripleClickHandler);\n  },\n\n  /**\n   * Default event handler for the basic functionalities needed on _mouseDown\n   * can be overridden to do something different.\n   * Scope of this implementation is: find the click position, set selectionStart\n   * find selectionEnd, initialize the drawing of either cursor or selection area\n   * initializing a mousedDown on a text area will cancel fabricjs knowledge of\n   * current compositionMode. It will be set to false.\n   */\n  _mouseDownHandler: function _mouseDownHandler(options) {\n    if (!this.canvas || !this.editable || options.e.button && options.e.button !== 1) {\n      return;\n    }\n\n    this.__isMousedown = true;\n\n    if (this.selected) {\n      this.inCompositionMode = false;\n      this.setCursorByClick(options.e);\n    }\n\n    if (this.isEditing) {\n      this.__selectionStartOnMouseDown = this.selectionStart;\n\n      if (this.selectionStart === this.selectionEnd) {\n        this.abortCursorAnimation();\n      }\n\n      this.renderCursorOrSelection();\n    }\n  },\n\n  /**\n   * Default event handler for the basic functionalities needed on mousedown:before\n   * can be overridden to do something different.\n   * Scope of this implementation is: verify the object is already selected when mousing down\n   */\n  _mouseDownHandlerBefore: function _mouseDownHandlerBefore(options) {\n    if (!this.canvas || !this.editable || options.e.button && options.e.button !== 1) {\n      return;\n    } // we want to avoid that an object that was selected and then becomes unselectable,\n    // may trigger editing mode in some way.\n\n\n    this.selected = this === this.canvas._activeObject;\n  },\n\n  /**\n   * Initializes \"mousedown\" event handler\n   */\n  initMousedownHandler: function initMousedownHandler() {\n    this.on('mousedown', this._mouseDownHandler);\n    this.on('mousedown:before', this._mouseDownHandlerBefore);\n  },\n\n  /**\n   * Initializes \"mouseup\" event handler\n   */\n  initMouseupHandler: function initMouseupHandler() {\n    this.on('mouseup', this.mouseUpHandler);\n  },\n\n  /**\n   * standard hander for mouse up, overridable\n   * @private\n   */\n  mouseUpHandler: function mouseUpHandler(options) {\n    this.__isMousedown = false;\n\n    if (!this.editable || this.group || options.transform && options.transform.actionPerformed || options.e.button && options.e.button !== 1) {\n      return;\n    }\n\n    if (this.canvas) {\n      var currentActive = this.canvas._activeObject;\n\n      if (currentActive && currentActive !== this) {\n        // avoid running this logic when there is an active object\n        // this because is possible with shift click and fast clicks,\n        // to rapidly deselect and reselect this object and trigger an enterEdit\n        return;\n      }\n    }\n\n    if (this.__lastSelected && !this.__corner) {\n      this.selected = false;\n      this.__lastSelected = false;\n      this.enterEditing(options.e);\n\n      if (this.selectionStart === this.selectionEnd) {\n        this.initDelayedCursor(true);\n      } else {\n        this.renderCursorOrSelection();\n      }\n    } else {\n      this.selected = true;\n    }\n  },\n\n  /**\n   * Changes cursor location in a text depending on passed pointer (x/y) object\n   * @param {Event} e Event object\n   */\n  setCursorByClick: function setCursorByClick(e) {\n    var newSelection = this.getSelectionStartFromPointer(e),\n        start = this.selectionStart,\n        end = this.selectionEnd;\n\n    if (e.shiftKey) {\n      this.setSelectionStartEndWithShift(start, end, newSelection);\n    } else {\n      this.selectionStart = newSelection;\n      this.selectionEnd = newSelection;\n    }\n\n    if (this.isEditing) {\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n    }\n  },\n\n  /**\n   * Returns index of a character corresponding to where an object was clicked\n   * @param {Event} e Event object\n   * @return {Number} Index of a character\n   */\n  getSelectionStartFromPointer: function getSelectionStartFromPointer(e) {\n    var mouseOffset = this.getLocalPointer(e),\n        prevWidth = 0,\n        width = 0,\n        height = 0,\n        charIndex = 0,\n        lineIndex = 0,\n        lineLeftOffset,\n        line;\n\n    for (var i = 0, len = this._textLines.length; i < len; i++) {\n      if (height <= mouseOffset.y) {\n        height += this.getHeightOfLine(i) * this.scaleY;\n        lineIndex = i;\n\n        if (i > 0) {\n          charIndex += this._textLines[i - 1].length + this.missingNewlineOffset(i - 1);\n        }\n      } else {\n        break;\n      }\n    }\n\n    lineLeftOffset = this._getLineLeftOffset(lineIndex);\n    width = lineLeftOffset * this.scaleX;\n    line = this._textLines[lineIndex];\n\n    for (var j = 0, jlen = line.length; j < jlen; j++) {\n      prevWidth = width; // i removed something about flipX here, check.\n\n      width += this.__charBounds[lineIndex][j].kernedWidth * this.scaleX;\n\n      if (width <= mouseOffset.x) {\n        charIndex++;\n      } else {\n        break;\n      }\n    }\n\n    return this._getNewSelectionStartFromOffset(mouseOffset, prevWidth, width, charIndex, jlen);\n  },\n\n  /**\n   * @private\n   */\n  _getNewSelectionStartFromOffset: function _getNewSelectionStartFromOffset(mouseOffset, prevWidth, width, index, jlen) {\n    // we need Math.abs because when width is after the last char, the offset is given as 1, while is 0\n    var distanceBtwLastCharAndCursor = mouseOffset.x - prevWidth,\n        distanceBtwNextCharAndCursor = width - mouseOffset.x,\n        offset = distanceBtwNextCharAndCursor > distanceBtwLastCharAndCursor || distanceBtwNextCharAndCursor < 0 ? 0 : 1,\n        newSelectionStart = index + offset; // if object is horizontally flipped, mirror cursor location from the end\n\n    if (this.flipX) {\n      newSelectionStart = jlen - newSelectionStart;\n    }\n\n    if (newSelectionStart > this._text.length) {\n      newSelectionStart = this._text.length;\n    }\n\n    return newSelectionStart;\n  }\n});\nfabric.util.object.extend(fabric.IText.prototype,\n/** @lends fabric.IText.prototype */\n{\n  /**\n   * Initializes hidden textarea (needed to bring up keyboard in iOS)\n   */\n  initHiddenTextarea: function initHiddenTextarea() {\n    this.hiddenTextarea = fabric.document.createElement('textarea');\n    this.hiddenTextarea.setAttribute('autocapitalize', 'off');\n    this.hiddenTextarea.setAttribute('autocorrect', 'off');\n    this.hiddenTextarea.setAttribute('autocomplete', 'off');\n    this.hiddenTextarea.setAttribute('spellcheck', 'false');\n    this.hiddenTextarea.setAttribute('data-fabric-hiddentextarea', '');\n    this.hiddenTextarea.setAttribute('wrap', 'off');\n\n    var style = this._calcTextareaPosition(); // line-height: 1px; was removed from the style to fix this:\n    // https://bugs.chromium.org/p/chromium/issues/detail?id=870966\n\n\n    this.hiddenTextarea.style.cssText = 'position: absolute; top: ' + style.top + '; left: ' + style.left + '; z-index: -999; opacity: 0; width: 1px; height: 1px; font-size: 1px;' + ' paddingｰtop: ' + style.fontSize + ';'; // Append hiddenTextarea to the canvas wrapperEl. This change from the standard\n    // behavior of appending to the document body was done so that the textarea will\n    // be placed within the focus locked area where the canvas is rendered.\n\n    this.canvas.wrapperEl.appendChild(this.hiddenTextarea);\n    fabric.util.addListener(this.hiddenTextarea, 'keydown', this.onKeyDown.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'keyup', this.onKeyUp.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'input', this.onInput.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'copy', this.copy.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'cut', this.copy.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'paste', this.paste.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'compositionstart', this.onCompositionStart.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'compositionupdate', this.onCompositionUpdate.bind(this));\n    fabric.util.addListener(this.hiddenTextarea, 'compositionend', this.onCompositionEnd.bind(this));\n\n    if (!this._clickHandlerInitialized && this.canvas) {\n      fabric.util.addListener(this.canvas.upperCanvasEl, 'click', this.onClick.bind(this));\n      this._clickHandlerInitialized = true;\n    }\n  },\n\n  /**\n   * For functionalities on keyDown\n   * Map a special key to a function of the instance/prototype\n   * If you need different behaviour for ESC or TAB or arrows, you have to change\n   * this map setting the name of a function that you build on the fabric.Itext or\n   * your prototype.\n   * the map change will affect all Instances unless you need for only some text Instances\n   * in that case you have to clone this object and assign your Instance.\n   * this.keysMap = fabric.util.object.clone(this.keysMap);\n   * The function must be in fabric.Itext.prototype.myFunction And will receive event as args[0]\n   */\n  keysMap: {\n    9: 'exitEditing',\n    27: 'exitEditing',\n    33: 'moveCursorUp',\n    34: 'moveCursorDown',\n    35: 'moveCursorRight',\n    36: 'moveCursorLeft',\n    37: 'moveCursorLeft',\n    38: 'moveCursorUp',\n    39: 'moveCursorRight',\n    40: 'moveCursorDown'\n  },\n\n  /**\n   * For functionalities on keyUp + ctrl || cmd\n   */\n  ctrlKeysMapUp: {\n    67: 'copy',\n    88: 'cut'\n  },\n\n  /**\n   * For functionalities on keyDown + ctrl || cmd\n   */\n  ctrlKeysMapDown: {\n    65: 'selectAll'\n  },\n  onClick: function onClick() {\n    // No need to trigger click event here, focus is enough to have the keyboard appear on Android\n    this.hiddenTextarea && this.hiddenTextarea.focus();\n  },\n\n  /**\n   * Handles keydown event\n   * only used for arrows and combination of modifier keys.\n   * @param {Event} e Event object\n   */\n  onKeyDown: function onKeyDown(e) {\n    if (!this.isEditing) {\n      return;\n    }\n\n    if (e.keyCode in this.keysMap) {\n      this[this.keysMap[e.keyCode]](e);\n    } else if (e.keyCode in this.ctrlKeysMapDown && (e.ctrlKey || e.metaKey)) {\n      this[this.ctrlKeysMapDown[e.keyCode]](e);\n    } else {\n      return;\n    }\n\n    e.stopImmediatePropagation();\n    e.preventDefault();\n\n    if (e.keyCode >= 33 && e.keyCode <= 40) {\n      // if i press an arrow key just update selection\n      this.inCompositionMode = false;\n      this.clearContextTop();\n      this.renderCursorOrSelection();\n    } else {\n      this.canvas && this.canvas.requestRenderAll();\n    }\n  },\n\n  /**\n   * Handles keyup event\n   * We handle KeyUp because ie11 and edge have difficulties copy/pasting\n   * if a copy/cut event fired, keyup is dismissed\n   * @param {Event} e Event object\n   */\n  onKeyUp: function onKeyUp(e) {\n    if (!this.isEditing || this._copyDone || this.inCompositionMode) {\n      this._copyDone = false;\n      return;\n    }\n\n    if (e.keyCode in this.ctrlKeysMapUp && (e.ctrlKey || e.metaKey)) {\n      this[this.ctrlKeysMapUp[e.keyCode]](e);\n    } else {\n      return;\n    }\n\n    e.stopImmediatePropagation();\n    e.preventDefault();\n    this.canvas && this.canvas.requestRenderAll();\n  },\n\n  /**\n   * Handles onInput event\n   * @param {Event} e Event object\n   */\n  onInput: function onInput(e) {\n    var fromPaste = this.fromPaste;\n    this.fromPaste = false;\n    e && e.stopPropagation();\n\n    if (!this.isEditing) {\n      return;\n    } // decisions about style changes.\n\n\n    var nextText = this._splitTextIntoLines(this.hiddenTextarea.value).graphemeText,\n        charCount = this._text.length,\n        nextCharCount = nextText.length,\n        removedText,\n        insertedText,\n        charDiff = nextCharCount - charCount;\n\n    if (this.hiddenTextarea.value === '') {\n      this.styles = {};\n      this.updateFromTextArea();\n      this.fire('changed');\n\n      if (this.canvas) {\n        this.canvas.fire('text:changed', {\n          target: this\n        });\n        this.canvas.requestRenderAll();\n      }\n\n      return;\n    }\n\n    var textareaSelection = this.fromStringToGraphemeSelection(this.hiddenTextarea.selectionStart, this.hiddenTextarea.selectionEnd, this.hiddenTextarea.value);\n    var backDelete = this.selectionStart > textareaSelection.selectionStart;\n\n    if (this.selectionStart !== this.selectionEnd) {\n      removedText = this._text.slice(this.selectionStart, this.selectionEnd);\n      charDiff += this.selectionEnd - this.selectionStart;\n    } else if (nextCharCount < charCount) {\n      if (backDelete) {\n        removedText = this._text.slice(this.selectionEnd + charDiff, this.selectionEnd);\n      } else {\n        removedText = this._text.slice(this.selectionStart, this.selectionStart - charDiff);\n      }\n    }\n\n    insertedText = nextText.slice(textareaSelection.selectionEnd - charDiff, textareaSelection.selectionEnd);\n\n    if (removedText && removedText.length) {\n      if (this.selectionStart !== this.selectionEnd) {\n        this.removeStyleFromTo(this.selectionStart, this.selectionEnd);\n      } else if (backDelete) {\n        // detect differencies between forwardDelete and backDelete\n        this.removeStyleFromTo(this.selectionEnd - removedText.length, this.selectionEnd);\n      } else {\n        this.removeStyleFromTo(this.selectionEnd, this.selectionEnd + removedText.length);\n      }\n    }\n\n    if (insertedText.length) {\n      if (fromPaste && insertedText.join('') === fabric.copiedText && !fabric.disableStyleCopyPaste) {\n        this.insertNewStyleBlock(insertedText, this.selectionStart, fabric.copiedTextStyle);\n      } else {\n        this.insertNewStyleBlock(insertedText, this.selectionStart);\n      }\n    }\n\n    this.updateFromTextArea();\n    this.fire('changed');\n\n    if (this.canvas) {\n      this.canvas.fire('text:changed', {\n        target: this\n      });\n      this.canvas.requestRenderAll();\n    }\n  },\n\n  /**\n   * Composition start\n   */\n  onCompositionStart: function onCompositionStart() {\n    this.inCompositionMode = true;\n  },\n\n  /**\n   * Composition end\n   */\n  onCompositionEnd: function onCompositionEnd() {\n    this.inCompositionMode = false;\n  },\n  // /**\n  //  * Composition update\n  //  */\n  onCompositionUpdate: function onCompositionUpdate(e) {\n    this.compositionStart = e.target.selectionStart;\n    this.compositionEnd = e.target.selectionEnd;\n    this.updateTextareaPosition();\n  },\n\n  /**\n   * Copies selected text\n   * @param {Event} e Event object\n   */\n  copy: function copy() {\n    if (this.selectionStart === this.selectionEnd) {\n      //do not cut-copy if no selection\n      return;\n    }\n\n    fabric.copiedText = this.getSelectedText();\n\n    if (!fabric.disableStyleCopyPaste) {\n      fabric.copiedTextStyle = this.getSelectionStyles(this.selectionStart, this.selectionEnd, true);\n    } else {\n      fabric.copiedTextStyle = null;\n    }\n\n    this._copyDone = true;\n  },\n\n  /**\n   * Pastes text\n   * @param {Event} e Event object\n   */\n  paste: function paste() {\n    this.fromPaste = true;\n  },\n\n  /**\n   * @private\n   * @param {Event} e Event object\n   * @return {Object} Clipboard data object\n   */\n  _getClipboardData: function _getClipboardData(e) {\n    return e && e.clipboardData || fabric.window.clipboardData;\n  },\n\n  /**\n   * Finds the width in pixels before the cursor on the same line\n   * @private\n   * @param {Number} lineIndex\n   * @param {Number} charIndex\n   * @return {Number} widthBeforeCursor width before cursor\n   */\n  _getWidthBeforeCursor: function _getWidthBeforeCursor(lineIndex, charIndex) {\n    var widthBeforeCursor = this._getLineLeftOffset(lineIndex),\n        bound;\n\n    if (charIndex > 0) {\n      bound = this.__charBounds[lineIndex][charIndex - 1];\n      widthBeforeCursor += bound.left + bound.width;\n    }\n\n    return widthBeforeCursor;\n  },\n\n  /**\n   * Gets start offset of a selection\n   * @param {Event} e Event object\n   * @param {Boolean} isRight\n   * @return {Number}\n   */\n  getDownCursorOffset: function getDownCursorOffset(e, isRight) {\n    var selectionProp = this._getSelectionForOffset(e, isRight),\n        cursorLocation = this.get2DCursorLocation(selectionProp),\n        lineIndex = cursorLocation.lineIndex; // if on last line, down cursor goes to end of line\n\n\n    if (lineIndex === this._textLines.length - 1 || e.metaKey || e.keyCode === 34) {\n      // move to the end of a text\n      return this._text.length - selectionProp;\n    }\n\n    var charIndex = cursorLocation.charIndex,\n        widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex),\n        indexOnOtherLine = this._getIndexOnLine(lineIndex + 1, widthBeforeCursor),\n        textAfterCursor = this._textLines[lineIndex].slice(charIndex);\n\n    return textAfterCursor.length + indexOnOtherLine + 1 + this.missingNewlineOffset(lineIndex);\n  },\n\n  /**\n   * private\n   * Helps finding if the offset should be counted from Start or End\n   * @param {Event} e Event object\n   * @param {Boolean} isRight\n   * @return {Number}\n   */\n  _getSelectionForOffset: function _getSelectionForOffset(e, isRight) {\n    if (e.shiftKey && this.selectionStart !== this.selectionEnd && isRight) {\n      return this.selectionEnd;\n    } else {\n      return this.selectionStart;\n    }\n  },\n\n  /**\n   * @param {Event} e Event object\n   * @param {Boolean} isRight\n   * @return {Number}\n   */\n  getUpCursorOffset: function getUpCursorOffset(e, isRight) {\n    var selectionProp = this._getSelectionForOffset(e, isRight),\n        cursorLocation = this.get2DCursorLocation(selectionProp),\n        lineIndex = cursorLocation.lineIndex;\n\n    if (lineIndex === 0 || e.metaKey || e.keyCode === 33) {\n      // if on first line, up cursor goes to start of line\n      return -selectionProp;\n    }\n\n    var charIndex = cursorLocation.charIndex,\n        widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex),\n        indexOnOtherLine = this._getIndexOnLine(lineIndex - 1, widthBeforeCursor),\n        textBeforeCursor = this._textLines[lineIndex].slice(0, charIndex),\n        missingNewlineOffset = this.missingNewlineOffset(lineIndex - 1); // return a negative offset\n\n\n    return -this._textLines[lineIndex - 1].length + indexOnOtherLine - textBeforeCursor.length + (1 - missingNewlineOffset);\n  },\n\n  /**\n   * for a given width it founds the matching character.\n   * @private\n   */\n  _getIndexOnLine: function _getIndexOnLine(lineIndex, width) {\n    var line = this._textLines[lineIndex],\n        lineLeftOffset = this._getLineLeftOffset(lineIndex),\n        widthOfCharsOnLine = lineLeftOffset,\n        indexOnLine = 0,\n        charWidth,\n        foundMatch;\n\n    for (var j = 0, jlen = line.length; j < jlen; j++) {\n      charWidth = this.__charBounds[lineIndex][j].width;\n      widthOfCharsOnLine += charWidth;\n\n      if (widthOfCharsOnLine > width) {\n        foundMatch = true;\n        var leftEdge = widthOfCharsOnLine - charWidth,\n            rightEdge = widthOfCharsOnLine,\n            offsetFromLeftEdge = Math.abs(leftEdge - width),\n            offsetFromRightEdge = Math.abs(rightEdge - width);\n        indexOnLine = offsetFromRightEdge < offsetFromLeftEdge ? j : j - 1;\n        break;\n      }\n    } // reached end\n\n\n    if (!foundMatch) {\n      indexOnLine = line.length - 1;\n    }\n\n    return indexOnLine;\n  },\n\n  /**\n   * Moves cursor down\n   * @param {Event} e Event object\n   */\n  moveCursorDown: function moveCursorDown(e) {\n    if (this.selectionStart >= this._text.length && this.selectionEnd >= this._text.length) {\n      return;\n    }\n\n    this._moveCursorUpOrDown('Down', e);\n  },\n\n  /**\n   * Moves cursor up\n   * @param {Event} e Event object\n   */\n  moveCursorUp: function moveCursorUp(e) {\n    if (this.selectionStart === 0 && this.selectionEnd === 0) {\n      return;\n    }\n\n    this._moveCursorUpOrDown('Up', e);\n  },\n\n  /**\n   * Moves cursor up or down, fires the events\n   * @param {String} direction 'Up' or 'Down'\n   * @param {Event} e Event object\n   */\n  _moveCursorUpOrDown: function _moveCursorUpOrDown(direction, e) {\n    // getUpCursorOffset\n    // getDownCursorOffset\n    var action = 'get' + direction + 'CursorOffset',\n        offset = this[action](e, this._selectionDirection === 'right');\n\n    if (e.shiftKey) {\n      this.moveCursorWithShift(offset);\n    } else {\n      this.moveCursorWithoutShift(offset);\n    }\n\n    if (offset !== 0) {\n      this.setSelectionInBoundaries();\n      this.abortCursorAnimation();\n      this._currentCursorOpacity = 1;\n      this.initDelayedCursor();\n\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n    }\n  },\n\n  /**\n   * Moves cursor with shift\n   * @param {Number} offset\n   */\n  moveCursorWithShift: function moveCursorWithShift(offset) {\n    var newSelection = this._selectionDirection === 'left' ? this.selectionStart + offset : this.selectionEnd + offset;\n    this.setSelectionStartEndWithShift(this.selectionStart, this.selectionEnd, newSelection);\n    return offset !== 0;\n  },\n\n  /**\n   * Moves cursor up without shift\n   * @param {Number} offset\n   */\n  moveCursorWithoutShift: function moveCursorWithoutShift(offset) {\n    if (offset < 0) {\n      this.selectionStart += offset;\n      this.selectionEnd = this.selectionStart;\n    } else {\n      this.selectionEnd += offset;\n      this.selectionStart = this.selectionEnd;\n    }\n\n    return offset !== 0;\n  },\n\n  /**\n   * Moves cursor left\n   * @param {Event} e Event object\n   */\n  moveCursorLeft: function moveCursorLeft(e) {\n    if (this.selectionStart === 0 && this.selectionEnd === 0) {\n      return;\n    }\n\n    this._moveCursorLeftOrRight('Left', e);\n  },\n\n  /**\n   * @private\n   * @return {Boolean} true if a change happened\n   */\n  _move: function _move(e, prop, direction) {\n    var newValue;\n\n    if (e.altKey) {\n      newValue = this['findWordBoundary' + direction](this[prop]);\n    } else if (e.metaKey || e.keyCode === 35 || e.keyCode === 36) {\n      newValue = this['findLineBoundary' + direction](this[prop]);\n    } else {\n      this[prop] += direction === 'Left' ? -1 : 1;\n      return true;\n    }\n\n    if (_typeof(newValue) !== undefined && this[prop] !== newValue) {\n      this[prop] = newValue;\n      return true;\n    }\n  },\n\n  /**\n   * @private\n   */\n  _moveLeft: function _moveLeft(e, prop) {\n    return this._move(e, prop, 'Left');\n  },\n\n  /**\n   * @private\n   */\n  _moveRight: function _moveRight(e, prop) {\n    return this._move(e, prop, 'Right');\n  },\n\n  /**\n   * Moves cursor left without keeping selection\n   * @param {Event} e\n   */\n  moveCursorLeftWithoutShift: function moveCursorLeftWithoutShift(e) {\n    var change = true;\n    this._selectionDirection = 'left'; // only move cursor when there is no selection,\n    // otherwise we discard it, and leave cursor on same place\n\n    if (this.selectionEnd === this.selectionStart && this.selectionStart !== 0) {\n      change = this._moveLeft(e, 'selectionStart');\n    }\n\n    this.selectionEnd = this.selectionStart;\n    return change;\n  },\n\n  /**\n   * Moves cursor left while keeping selection\n   * @param {Event} e\n   */\n  moveCursorLeftWithShift: function moveCursorLeftWithShift(e) {\n    if (this._selectionDirection === 'right' && this.selectionStart !== this.selectionEnd) {\n      return this._moveLeft(e, 'selectionEnd');\n    } else if (this.selectionStart !== 0) {\n      this._selectionDirection = 'left';\n      return this._moveLeft(e, 'selectionStart');\n    }\n  },\n\n  /**\n   * Moves cursor right\n   * @param {Event} e Event object\n   */\n  moveCursorRight: function moveCursorRight(e) {\n    if (this.selectionStart >= this._text.length && this.selectionEnd >= this._text.length) {\n      return;\n    }\n\n    this._moveCursorLeftOrRight('Right', e);\n  },\n\n  /**\n   * Moves cursor right or Left, fires event\n   * @param {String} direction 'Left', 'Right'\n   * @param {Event} e Event object\n   */\n  _moveCursorLeftOrRight: function _moveCursorLeftOrRight(direction, e) {\n    var actionName = 'moveCursor' + direction + 'With';\n    this._currentCursorOpacity = 1;\n\n    if (e.shiftKey) {\n      actionName += 'Shift';\n    } else {\n      actionName += 'outShift';\n    }\n\n    if (this[actionName](e)) {\n      this.abortCursorAnimation();\n      this.initDelayedCursor();\n\n      this._fireSelectionChanged();\n\n      this._updateTextarea();\n    }\n  },\n\n  /**\n   * Moves cursor right while keeping selection\n   * @param {Event} e\n   */\n  moveCursorRightWithShift: function moveCursorRightWithShift(e) {\n    if (this._selectionDirection === 'left' && this.selectionStart !== this.selectionEnd) {\n      return this._moveRight(e, 'selectionStart');\n    } else if (this.selectionEnd !== this._text.length) {\n      this._selectionDirection = 'right';\n      return this._moveRight(e, 'selectionEnd');\n    }\n  },\n\n  /**\n   * Moves cursor right without keeping selection\n   * @param {Event} e Event object\n   */\n  moveCursorRightWithoutShift: function moveCursorRightWithoutShift(e) {\n    var changed = true;\n    this._selectionDirection = 'right';\n\n    if (this.selectionStart === this.selectionEnd) {\n      changed = this._moveRight(e, 'selectionStart');\n      this.selectionEnd = this.selectionStart;\n    } else {\n      this.selectionStart = this.selectionEnd;\n    }\n\n    return changed;\n  },\n\n  /**\n   * Removes characters from start/end\n   * start/end ar per grapheme position in _text array.\n   *\n   * @param {Number} start\n   * @param {Number} end default to start + 1\n   */\n  removeChars: function removeChars(start, end) {\n    if (typeof end === 'undefined') {\n      end = start + 1;\n    }\n\n    this.removeStyleFromTo(start, end);\n\n    this._text.splice(start, end - start);\n\n    this.text = this._text.join('');\n    this.set('dirty', true);\n\n    if (this._shouldClearDimensionCache()) {\n      this.initDimensions();\n      this.setCoords();\n    }\n\n    this._removeExtraneousStyles();\n  },\n\n  /**\n   * insert characters at start position, before start position.\n   * start  equal 1 it means the text get inserted between actual grapheme 0 and 1\n   * if style array is provided, it must be as the same length of text in graphemes\n   * if end is provided and is bigger than start, old text is replaced.\n   * start/end ar per grapheme position in _text array.\n   *\n   * @param {String} text text to insert\n   * @param {Array} style array of style objects\n   * @param {Number} start\n   * @param {Number} end default to start + 1\n   */\n  insertChars: function insertChars(text, style, start, end) {\n    if (typeof end === 'undefined') {\n      end = start;\n    }\n\n    if (end > start) {\n      this.removeStyleFromTo(start, end);\n    }\n\n    var graphemes = fabric.util.string.graphemeSplit(text);\n    this.insertNewStyleBlock(graphemes, start, style);\n    this._text = [].concat(this._text.slice(0, start), graphemes, this._text.slice(end));\n    this.text = this._text.join('');\n    this.set('dirty', true);\n\n    if (this._shouldClearDimensionCache()) {\n      this.initDimensions();\n      this.setCoords();\n    }\n\n    this._removeExtraneousStyles();\n  }\n});\n\n(function (global) {\n  'use strict';\n\n  var fabric = global.fabric || (global.fabric = {});\n  /**\n   * Textbox class, based on IText, allows the user to resize the text rectangle\n   * and wraps lines automatically. Textboxes have their Y scaling locked, the\n   * user can only change width. Height is adjusted automatically based on the\n   * wrapping of lines.\n   * @class fabric.Textbox\n   * @extends fabric.IText\n   * @mixes fabric.Observable\n   * @return {fabric.Textbox} thisArg\n   * @see {@link fabric.Textbox#initialize} for constructor definition\n   */\n\n  fabric.Textbox = fabric.util.createClass(fabric.IText, fabric.Observable, {\n    /**\n     * Type of an object\n     * @type String\n     * @default\n     */\n    type: 'textbox',\n\n    /**\n     * Minimum width of textbox, in pixels.\n     * @type Number\n     * @default\n     */\n    minWidth: 20,\n\n    /**\n     * Minimum calculated width of a textbox, in pixels.\n     * fixed to 2 so that an empty textbox cannot go to 0\n     * and is still selectable without text.\n     * @type Number\n     * @default\n     */\n    dynamicMinWidth: 2,\n\n    /**\n     * Cached array of text wrapping.\n     * @type Array\n     */\n    __cachedLines: null,\n\n    /**\n     * Override standard Object class values\n     */\n    lockScalingFlip: true,\n\n    /**\n     * Override standard Object class values\n     * Textbox needs this on false\n     */\n    noScaleCache: false,\n\n    /**\n     * Properties which when set cause object to change dimensions\n     * @type Object\n     * @private\n     */\n    _dimensionAffectingProps: fabric.Text.prototype._dimensionAffectingProps.concat('width'),\n\n    /**\n     * Use this regular expression to split strings in breakable lines\n     * @private\n     */\n    _wordJoiners: /[ \\t\\r]/,\n\n    /**\n     * Use this boolean property in order to split strings that have no white space concept.\n     * this is a cheap way to help with chinese/japaense\n     * @type Boolean\n     * @since 2.6.0\n     */\n    splitByGrapheme: false,\n\n    /**\n     * Unlike superclass's version of this function, Textbox does not update\n     * its width.\n     * @private\n     * @override\n     */\n    initDimensions: function initDimensions() {\n      if (this.__skipDimension) {\n        return;\n      }\n\n      this.isEditing && this.initDelayedCursor();\n      this.clearContextTop();\n\n      this._clearCache(); // clear dynamicMinWidth as it will be different after we re-wrap line\n\n\n      this.dynamicMinWidth = 0; // wrap lines\n\n      this._styleMap = this._generateStyleMap(this._splitText()); // if after wrapping, the width is smaller than dynamicMinWidth, change the width and re-wrap\n\n      if (this.dynamicMinWidth > this.width) {\n        this._set('width', this.dynamicMinWidth);\n      }\n\n      if (this.textAlign.indexOf('justify') !== -1) {\n        // once text is measured we need to make space fatter to make justified text.\n        this.enlargeSpaces();\n      } // clear cache and re-calculate height\n\n\n      this.height = this.calcTextHeight();\n      this.saveState({\n        propertySet: '_dimensionAffectingProps'\n      });\n    },\n\n    /**\n     * Generate an object that translates the style object so that it is\n     * broken up by visual lines (new lines and automatic wrapping).\n     * The original text styles object is broken up by actual lines (new lines only),\n     * which is only sufficient for Text / IText\n     * @private\n     */\n    _generateStyleMap: function _generateStyleMap(textInfo) {\n      var realLineCount = 0,\n          realLineCharCount = 0,\n          charCount = 0,\n          map = {};\n\n      for (var i = 0; i < textInfo.graphemeLines.length; i++) {\n        if (textInfo.graphemeText[charCount] === '\\n' && i > 0) {\n          realLineCharCount = 0;\n          charCount++;\n          realLineCount++;\n        } else if (!this.splitByGrapheme && this._reSpaceAndTab.test(textInfo.graphemeText[charCount]) && i > 0) {\n          // this case deals with space's that are removed from end of lines when wrapping\n          realLineCharCount++;\n          charCount++;\n        }\n\n        map[i] = {\n          line: realLineCount,\n          offset: realLineCharCount\n        };\n        charCount += textInfo.graphemeLines[i].length;\n        realLineCharCount += textInfo.graphemeLines[i].length;\n      }\n\n      return map;\n    },\n\n    /**\n     * Returns true if object has a style property or has it on a specified line\n     * @param {Number} lineIndex\n     * @return {Boolean}\n     */\n    styleHas: function styleHas(property, lineIndex) {\n      if (this._styleMap && !this.isWrapping) {\n        var map = this._styleMap[lineIndex];\n\n        if (map) {\n          lineIndex = map.line;\n        }\n      }\n\n      return fabric.Text.prototype.styleHas.call(this, property, lineIndex);\n    },\n\n    /**\n     * Returns true if object has no styling or no styling in a line\n     * @param {Number} lineIndex , lineIndex is on wrapped lines.\n     * @return {Boolean}\n     */\n    isEmptyStyles: function isEmptyStyles(lineIndex) {\n      if (!this.styles) {\n        return true;\n      }\n\n      var offset = 0,\n          nextLineIndex = lineIndex + 1,\n          nextOffset,\n          obj,\n          shouldLimit = false,\n          map = this._styleMap[lineIndex],\n          mapNextLine = this._styleMap[lineIndex + 1];\n\n      if (map) {\n        lineIndex = map.line;\n        offset = map.offset;\n      }\n\n      if (mapNextLine) {\n        nextLineIndex = mapNextLine.line;\n        shouldLimit = nextLineIndex === lineIndex;\n        nextOffset = mapNextLine.offset;\n      }\n\n      obj = typeof lineIndex === 'undefined' ? this.styles : {\n        line: this.styles[lineIndex]\n      };\n\n      for (var p1 in obj) {\n        for (var p2 in obj[p1]) {\n          if (p2 >= offset && (!shouldLimit || p2 < nextOffset)) {\n            // eslint-disable-next-line no-unused-vars\n            for (var p3 in obj[p1][p2]) {\n              return false;\n            }\n          }\n        }\n      }\n\n      return true;\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @private\n     */\n    _getStyleDeclaration: function _getStyleDeclaration(lineIndex, charIndex) {\n      if (this._styleMap && !this.isWrapping) {\n        var map = this._styleMap[lineIndex];\n\n        if (!map) {\n          return null;\n        }\n\n        lineIndex = map.line;\n        charIndex = map.offset + charIndex;\n      }\n\n      return this.callSuper('_getStyleDeclaration', lineIndex, charIndex);\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @param {Object} style\n     * @private\n     */\n    _setStyleDeclaration: function _setStyleDeclaration(lineIndex, charIndex, style) {\n      var map = this._styleMap[lineIndex];\n      lineIndex = map.line;\n      charIndex = map.offset + charIndex;\n      this.styles[lineIndex][charIndex] = style;\n    },\n\n    /**\n     * @param {Number} lineIndex\n     * @param {Number} charIndex\n     * @private\n     */\n    _deleteStyleDeclaration: function _deleteStyleDeclaration(lineIndex, charIndex) {\n      var map = this._styleMap[lineIndex];\n      lineIndex = map.line;\n      charIndex = map.offset + charIndex;\n      delete this.styles[lineIndex][charIndex];\n    },\n\n    /**\n     * probably broken need a fix\n     * Returns the real style line that correspond to the wrapped lineIndex line\n     * Used just to verify if the line does exist or not.\n     * @param {Number} lineIndex\n     * @returns {Boolean} if the line exists or not\n     * @private\n     */\n    _getLineStyle: function _getLineStyle(lineIndex) {\n      var map = this._styleMap[lineIndex];\n      return !!this.styles[map.line];\n    },\n\n    /**\n     * Set the line style to an empty object so that is initialized\n     * @param {Number} lineIndex\n     * @param {Object} style\n     * @private\n     */\n    _setLineStyle: function _setLineStyle(lineIndex) {\n      var map = this._styleMap[lineIndex];\n      this.styles[map.line] = {};\n    },\n\n    /**\n     * Wraps text using the 'width' property of Textbox. First this function\n     * splits text on newlines, so we preserve newlines entered by the user.\n     * Then it wraps each line using the width of the Textbox by calling\n     * _wrapLine().\n     * @param {Array} lines The string array of text that is split into lines\n     * @param {Number} desiredWidth width you want to wrap to\n     * @returns {Array} Array of lines\n     */\n    _wrapText: function _wrapText(lines, desiredWidth) {\n      var wrapped = [],\n          i;\n      this.isWrapping = true;\n\n      for (i = 0; i < lines.length; i++) {\n        wrapped = wrapped.concat(this._wrapLine(lines[i], i, desiredWidth));\n      }\n\n      this.isWrapping = false;\n      return wrapped;\n    },\n\n    /**\n     * Helper function to measure a string of text, given its lineIndex and charIndex offset\n     * it gets called when charBounds are not available yet.\n     * @param {CanvasRenderingContext2D} ctx\n     * @param {String} text\n     * @param {number} lineIndex\n     * @param {number} charOffset\n     * @returns {number}\n     * @private\n     */\n    _measureWord: function _measureWord(word, lineIndex, charOffset) {\n      var width = 0,\n          prevGrapheme,\n          skipLeft = true;\n      charOffset = charOffset || 0;\n\n      for (var i = 0, len = word.length; i < len; i++) {\n        var box = this._getGraphemeBox(word[i], lineIndex, i + charOffset, prevGrapheme, skipLeft);\n\n        width += box.kernedWidth;\n        prevGrapheme = word[i];\n      }\n\n      return width;\n    },\n\n    /**\n     * Wraps a line of text using the width of the Textbox and a context.\n     * @param {Array} line The grapheme array that represent the line\n     * @param {Number} lineIndex\n     * @param {Number} desiredWidth width you want to wrap the line to\n     * @param {Number} reservedSpace space to remove from wrapping for custom functionalities\n     * @returns {Array} Array of line(s) into which the given text is wrapped\n     * to.\n     */\n    _wrapLine: function _wrapLine(_line, lineIndex, desiredWidth, reservedSpace) {\n      var lineWidth = 0,\n          splitByGrapheme = this.splitByGrapheme,\n          graphemeLines = [],\n          line = [],\n          // spaces in different languges?\n      words = splitByGrapheme ? fabric.util.string.graphemeSplit(_line) : _line.split(this._wordJoiners),\n          word = '',\n          offset = 0,\n          infix = splitByGrapheme ? '' : ' ',\n          wordWidth = 0,\n          infixWidth = 0,\n          largestWordWidth = 0,\n          lineJustStarted = true,\n          additionalSpace = splitByGrapheme ? 0 : this._getWidthOfCharSpacing(),\n          reservedSpace = reservedSpace || 0; // fix a difference between split and graphemeSplit\n\n      if (words.length === 0) {\n        words.push([]);\n      }\n\n      desiredWidth -= reservedSpace;\n\n      for (var i = 0; i < words.length; i++) {\n        // if using splitByGrapheme words are already in graphemes.\n        word = splitByGrapheme ? words[i] : fabric.util.string.graphemeSplit(words[i]);\n        wordWidth = this._measureWord(word, lineIndex, offset);\n        offset += word.length;\n        lineWidth += infixWidth + wordWidth - additionalSpace;\n\n        if (lineWidth >= desiredWidth && !lineJustStarted) {\n          graphemeLines.push(line);\n          line = [];\n          lineWidth = wordWidth;\n          lineJustStarted = true;\n        } else {\n          lineWidth += additionalSpace;\n        }\n\n        if (!lineJustStarted && !splitByGrapheme) {\n          line.push(infix);\n        }\n\n        line = line.concat(word);\n        infixWidth = this._measureWord([infix], lineIndex, offset);\n        offset++;\n        lineJustStarted = false; // keep track of largest word\n\n        if (wordWidth > largestWordWidth) {\n          largestWordWidth = wordWidth;\n        }\n      }\n\n      i && graphemeLines.push(line);\n\n      if (largestWordWidth + reservedSpace > this.dynamicMinWidth) {\n        this.dynamicMinWidth = largestWordWidth - additionalSpace + reservedSpace;\n      }\n\n      return graphemeLines;\n    },\n\n    /**\n     * Detect if the text line is ended with an hard break\n     * text and itext do not have wrapping, return false\n     * @param {Number} lineIndex text to split\n     * @return {Boolean}\n     */\n    isEndOfWrapping: function isEndOfWrapping(lineIndex) {\n      if (!this._styleMap[lineIndex + 1]) {\n        // is last line, return true;\n        return true;\n      }\n\n      if (this._styleMap[lineIndex + 1].line !== this._styleMap[lineIndex].line) {\n        // this is last line before a line break, return true;\n        return true;\n      }\n\n      return false;\n    },\n\n    /**\n     * Detect if a line has a linebreak and so we need to account for it when moving\n     * and counting style.\n     * @return Number\n     */\n    missingNewlineOffset: function missingNewlineOffset(lineIndex) {\n      if (this.splitByGrapheme) {\n        return this.isEndOfWrapping(lineIndex) ? 1 : 0;\n      }\n\n      return 1;\n    },\n\n    /**\n    * Gets lines of text to render in the Textbox. This function calculates\n    * text wrapping on the fly every time it is called.\n    * @param {String} text text to split\n    * @returns {Array} Array of lines in the Textbox.\n    * @override\n    */\n    _splitTextIntoLines: function _splitTextIntoLines(text) {\n      var newText = fabric.Text.prototype._splitTextIntoLines.call(this, text),\n          graphemeLines = this._wrapText(newText.lines, this.width),\n          lines = new Array(graphemeLines.length);\n\n      for (var i = 0; i < graphemeLines.length; i++) {\n        lines[i] = graphemeLines[i].join('');\n      }\n\n      newText.lines = lines;\n      newText.graphemeLines = graphemeLines;\n      return newText;\n    },\n    getMinWidth: function getMinWidth() {\n      return Math.max(this.minWidth, this.dynamicMinWidth);\n    },\n    _removeExtraneousStyles: function _removeExtraneousStyles() {\n      var linesToKeep = {};\n\n      for (var prop in this._styleMap) {\n        if (this._textLines[prop]) {\n          linesToKeep[this._styleMap[prop].line] = 1;\n        }\n      }\n\n      for (var prop in this.styles) {\n        if (!linesToKeep[prop]) {\n          delete this.styles[prop];\n        }\n      }\n    },\n\n    /**\n     * Returns object representation of an instance\n     * @method toObject\n     * @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output\n     * @return {Object} object representation of an instance\n     */\n    toObject: function toObject(propertiesToInclude) {\n      return this.callSuper('toObject', ['minWidth', 'splitByGrapheme'].concat(propertiesToInclude));\n    }\n  });\n  /**\n   * Returns fabric.Textbox instance from an object representation\n   * @static\n   * @memberOf fabric.Textbox\n   * @param {Object} object Object to create an instance from\n   * @param {Function} [callback] Callback to invoke when an fabric.Textbox instance is created\n   */\n\n  fabric.Textbox.fromObject = function (object, callback) {\n    return fabric.Object._fromObject('Textbox', object, callback, 'text');\n  };\n})(typeof exports !== 'undefined' ? exports : this);","\"use strict\";\n\nvar __spreadArrays = this && this.__spreadArrays || function () {\n  for (var s = 0, i = 0, il = arguments.length; i < il; i++) {\n    s += arguments[i].length;\n  }\n\n  for (var r = Array(s), k = 0, i = 0; i < il; i++) {\n    for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) {\n      r[k] = a[j];\n    }\n  }\n\n  return r;\n};\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar react_1 = require(\"react\");\n\nvar types_1 = require(\"./types\");\n\nexports.getStepDecimals = function (step) {\n  var decimals = step.toString().split('.')[1];\n  return decimals ? decimals.length : 0;\n};\n\nfunction isTouchEvent(event) {\n  return event.touches && event.touches.length || event.changedTouches && event.changedTouches.length;\n}\n\nexports.isTouchEvent = isTouchEvent;\n\nfunction isStepDivisible(min, max, step) {\n  var res = (max - min) / step;\n  return parseInt(res.toString(), 10) === res;\n}\n\nexports.isStepDivisible = isStepDivisible;\n\nfunction normalizeValue(value, index, min, max, step, allowOverlap, values) {\n  var BIG_NUM = 10e10;\n  value = Math.round(value * BIG_NUM) / BIG_NUM;\n\n  if (!allowOverlap) {\n    var prev = values[index - 1];\n    var next = values[index + 1];\n    if (prev && prev > value) return prev;\n    if (next && next < value) return next;\n  }\n\n  if (value > max) return max;\n  if (value < min) return min;\n  var inverter = min < 0 ? -1 : 1;\n  var remainder = Math.round(value * BIG_NUM - inverter * min * BIG_NUM) % Math.round(step * BIG_NUM);\n  var closestBigNum = Math.round(value * BIG_NUM - remainder);\n  var rounded = remainder === 0 ? value : closestBigNum / BIG_NUM;\n  var res = Math.abs(remainder / BIG_NUM) < step / 2 ? rounded : rounded + step * ((value > 0 ? 1 : 0) + (value < 0 ? -1 : 0) || +value);\n  var decimalPlaces = exports.getStepDecimals(step);\n  return parseFloat(res.toFixed(decimalPlaces));\n}\n\nexports.normalizeValue = normalizeValue;\n\nfunction relativeValue(value, min, max) {\n  return (value - min) / (max - min);\n}\n\nexports.relativeValue = relativeValue;\n\nfunction isVertical(direction) {\n  return direction === types_1.Direction.Up || direction === types_1.Direction.Down;\n}\n\nexports.isVertical = isVertical;\n\nfunction checkBoundaries(value, min, max) {\n  if (min >= max) {\n    throw new RangeError(\"min (\" + min + \") is equal/bigger than max (\" + max + \")\");\n  }\n\n  if (value < min) {\n    throw new RangeError(\"value (\" + value + \") is smaller than min (\" + min + \")\");\n  }\n\n  if (value > max) {\n    throw new RangeError(\"value (\" + value + \") is bigger than max (\" + max + \")\");\n  }\n}\n\nexports.checkBoundaries = checkBoundaries;\n\nfunction checkInitialOverlap(values) {\n  if (values.length < 2) return;\n\n  if (!values.slice(1).every(function (item, i) {\n    return values[i] <= item;\n  })) {\n    throw new RangeError(\"values={[\" + values + \"]} needs to be sorted when allowOverlap={false}\");\n  }\n}\n\nexports.checkInitialOverlap = checkInitialOverlap;\n\nfunction getMargin(element) {\n  var style = window.getComputedStyle(element);\n  return {\n    top: parseInt(style['margin-top'], 10),\n    bottom: parseInt(style['margin-bottom'], 10),\n    left: parseInt(style['margin-left'], 10),\n    right: parseInt(style['margin-right'], 10)\n  };\n}\n\nexports.getMargin = getMargin;\n\nfunction getPaddingAndBorder(element) {\n  var style = window.getComputedStyle(element);\n  return {\n    top: parseInt(style['padding-top'], 10) + parseInt(style['border-top-width'], 10),\n    bottom: parseInt(style['padding-bottom'], 10) + parseInt(style['border-bottom-width'], 10),\n    left: parseInt(style['padding-left'], 10) + parseInt(style['border-left-width'], 10),\n    right: parseInt(style['padding-right'], 10) + parseInt(style['border-right-width'], 10)\n  };\n}\n\nexports.getPaddingAndBorder = getPaddingAndBorder;\n\nfunction translateThumbs(elements, offsets, rtl) {\n  var inverter = rtl ? -1 : 1;\n  elements.forEach(function (element, index) {\n    return translate(element, inverter * offsets[index].x, offsets[index].y);\n  });\n}\n\nexports.translateThumbs = translateThumbs;\n\nfunction translate(element, x, y) {\n  element.style.transform = \"translate(\" + x + \"px, \" + y + \"px)\";\n}\n\nexports.translate = translate; // adapted from https://github.com/alexreardon/raf-schd\n\nexports.schd = function (fn) {\n  var lastArgs = [];\n  var frameId = null;\n\n  var wrapperFn = function wrapperFn() {\n    var args = [];\n\n    for (var _i = 0; _i < arguments.length; _i++) {\n      args[_i] = arguments[_i];\n    }\n\n    lastArgs = args;\n\n    if (frameId) {\n      return;\n    }\n\n    frameId = requestAnimationFrame(function () {\n      frameId = null;\n      fn.apply(void 0, lastArgs);\n    });\n  };\n\n  return wrapperFn;\n};\n\nfunction replaceAt(values, index, value) {\n  var ret = values.slice(0);\n  ret[index] = value;\n  return ret;\n}\n\nexports.replaceAt = replaceAt;\n\nfunction getTrackBackground(_a) {\n  var values = _a.values,\n      colors = _a.colors,\n      min = _a.min,\n      max = _a.max,\n      _b = _a.direction,\n      direction = _b === void 0 ? types_1.Direction.Right : _b,\n      _c = _a.rtl,\n      rtl = _c === void 0 ? false : _c;\n\n  if (rtl && direction === types_1.Direction.Right) {\n    direction = types_1.Direction.Left;\n  } else if (rtl && types_1.Direction.Left) {\n    direction = types_1.Direction.Right;\n  }\n\n  var progress = values.map(function (value) {\n    return (value - min) / (max - min) * 100;\n  });\n  var middle = progress.reduce(function (acc, point, index) {\n    return acc + \", \" + colors[index] + \" \" + point + \"%, \" + colors[index + 1] + \" \" + point + \"%\";\n  }, '');\n  return \"linear-gradient(\" + direction + \", \" + colors[0] + \" 0%\" + middle + \", \" + colors[colors.length - 1] + \" 100%)\";\n}\n\nexports.getTrackBackground = getTrackBackground;\n\nfunction voidFn() {}\n\nexports.voidFn = voidFn;\n\nfunction assertUnreachable(x) {\n  throw new Error(\"Didn't expect to get here\");\n}\n\nexports.assertUnreachable = assertUnreachable;\n/**\n * Util function for grabbing the true largest width of a thumb\n * including the label\n * @param thumbEl - Thumb element to grab the largest width from\n * @param value - Thumb value, not label value\n * @param separator - Label separator value\n */\n\nvar getThumbWidth = function getThumbWidth(thumbEl, value, separator, decimalPlaces, valueToLabel) {\n  if (valueToLabel === void 0) {\n    valueToLabel = function valueToLabel(value) {\n      return value;\n    };\n  }\n\n  var width = Math.ceil(__spreadArrays([thumbEl], Array.from(thumbEl.children)).reduce(function (width, el) {\n    var elWidth = Math.ceil(el.getBoundingClientRect().width);\n    /**\n     * If a label contains a merged label value, it won't return the true\n     * label width for that Thumb. Clone the label and change the value\n     * to that individual Thumb value in order to grab the true width.\n     */\n\n    if (el.innerText && el.innerText.includes(separator) && el.childElementCount === 0) {\n      var elClone = el.cloneNode(true);\n      elClone.innerHTML = valueToLabel(value.toFixed(decimalPlaces));\n      elClone.style.visibility = 'hidden';\n      document.body.append(elClone);\n      elWidth = Math.ceil(elClone.getBoundingClientRect().width);\n      elClone.remove();\n    }\n\n    return elWidth > width ? elWidth : width;\n  }, thumbEl.getBoundingClientRect().width));\n  return width;\n};\n/**\n * Bulk of logic for thumb overlaps\n * Consider a scenario with 5 thumbs;\n * Thumb 1 overlaps with thumb 0 and thumb 2\n * Thumb 2 overlaps with thumb 3\n * We need an array that contains [0, 1, 2, 3]\n * The function needs to return the directly overlapping thumbs\n * and all thumbs overlapping linked to those and so on\n * @param index - Thumb index calculating overlaps for\n * @param offsets - Current Array of Thumb offsets for Range\n * @param thumbs - Array of Thumb elements\n * @param values - Array of Thumb values\n * @param separator - String separator for merged label values\n * @returns overlaps - Array of all overlapping thumbs from the index\n */\n\n\nvar getOverlaps = function getOverlaps(index, offsets, thumbs, values, separator, decimalPlaces, valueToLabel) {\n  if (valueToLabel === void 0) {\n    valueToLabel = function valueToLabel(value) {\n      return value;\n    };\n  }\n\n  var overlaps = [];\n  /**\n   * Recursive function for building the overlaps Array\n   * If an overlap is found, find the overlaps for that overlap\n   * @param thumbIndex current Thumb index to find overlaps from\n   */\n\n  var buildOverlaps = function buildOverlaps(thumbIndex) {\n    var thumbXWidth = getThumbWidth(thumbs[thumbIndex], values[thumbIndex], separator, decimalPlaces, valueToLabel);\n    var thumbX = offsets[thumbIndex].x;\n    /**\n     * Iterate through the Thumb offsets, if there is a match\n     * add the thumbIndex and siblingIndex to the overlaps Array\n     *\n     * Then build overlaps from the overlapping siblingIndex\n     */\n\n    offsets.forEach(function (_a, siblingIndex) {\n      var siblingX = _a.x;\n      var siblingWidth = getThumbWidth(thumbs[siblingIndex], values[siblingIndex], separator, decimalPlaces, valueToLabel);\n\n      if (thumbIndex !== siblingIndex && (thumbX >= siblingX && thumbX <= siblingX + siblingWidth || thumbX + thumbXWidth >= siblingX && thumbX + thumbXWidth <= siblingX + siblingWidth)) {\n        if (!overlaps.includes(siblingIndex)) {\n          overlaps.push(thumbIndex);\n          overlaps.push(siblingIndex);\n          overlaps = __spreadArrays(overlaps, [thumbIndex, siblingIndex]);\n          buildOverlaps(siblingIndex);\n        }\n      }\n    });\n  };\n\n  buildOverlaps(index); // Sort and remove duplicates from the built overlaps\n\n  return Array.from(new Set(overlaps.sort()));\n};\n/**\n * A custom React Hook for calculating whether a thumb overlaps\n * another and whether labels could/should merge.\n * @param rangeRef - React ref value of Range component\n * @param values - current Range values Array\n * @param index - thumb index\n * @param step - step value, used to calculate the number of decimal places\n * @param separator - string to separate thumb values\n * @returns label value + styling for thumb label\n */\n\n\nexports.useThumbOverlap = function (rangeRef, values, index, step, separator, valueToLabel) {\n  if (step === void 0) {\n    step = 0.1;\n  }\n\n  if (separator === void 0) {\n    separator = ' - ';\n  }\n\n  if (valueToLabel === void 0) {\n    valueToLabel = function valueToLabel(value) {\n      return value;\n    };\n  }\n\n  var decimalPlaces = exports.getStepDecimals(step); // Create initial label style and value. Label value defaults to thumb value\n\n  var _a = react_1.useState({}),\n      labelStyle = _a[0],\n      setLabelStyle = _a[1];\n\n  var _b = react_1.useState(valueToLabel(values[index].toFixed(decimalPlaces))),\n      labelValue = _b[0],\n      setLabelValue = _b[1]; // When the rangeRef or values change, update the Thumb label values and styling\n\n\n  react_1.useEffect(function () {\n    if (rangeRef) {\n      var thumbs = rangeRef.getThumbs();\n      if (thumbs.length < 1) return;\n      var newStyle = {};\n      var offsets_1 = rangeRef.getOffsets();\n      /**\n       * Get any overlaps for the given Thumb index. This must return all linked\n       * Thumbs. So if there are 4 Thumbs and Thumbs 2, 3 and 4 overlap. If we are\n       * getting the overlaps for Thumb 1 and it overlaps only Thumb 2, we must get\n       * 2, 3 and 4 also.\n       */\n\n      var overlaps = getOverlaps(index, offsets_1, thumbs, values, separator, decimalPlaces, valueToLabel); // Set a default label value of the Thumb value\n\n      var labelValue_1 = valueToLabel(values[index].toFixed(decimalPlaces));\n      /**\n       * If there are overlaps for the Thumb, we need to calculate the correct\n       * Label value along with the relevant styling. We only want to show a Label\n       * for the left most Thumb in an overlapping set.\n       * All other Thumbs will be set to display: none.\n       */\n\n      if (overlaps.length) {\n        /**\n         * Get an Array of the offsets for the overlapping Thumbs\n         * This is so we can determine if the Thumb we are looking at\n         * is the left most thumb in an overlapping set\n         */\n        var offsetsX = overlaps.reduce(function (a, c, i, s) {\n          return a.length ? __spreadArrays(a, [offsets_1[s[i]].x]) : [offsets_1[s[i]].x];\n        }, []);\n        /**\n         * If our Thumb is the left most Thumb, we can build a Label value\n         * and set the style for that Label\n         */\n\n        if (Math.min.apply(Math, offsetsX) === offsets_1[index].x) {\n          /**\n           * First calculate the Label value. To do this,\n           * grab all the values for the Thumbs in our overlaps.\n           * Then convert that to a Set and sort it whilst removing duplicates.\n           */\n          var labelValues_1 = [];\n          overlaps.forEach(function (thumb) {\n            labelValues_1.push(values[thumb].toFixed(decimalPlaces));\n          });\n          /**\n           *  Update the labelValue with the resulting Array\n           *  joined by our defined separator\n           */\n\n          labelValue_1 = Array.from(new Set(labelValues_1.sort(function (a, b) {\n            return parseFloat(a) - parseFloat(b);\n          }))).map(valueToLabel).join(separator);\n          /**\n           * Lastly, build the label styling. The label styling will\n           * position the label and apply a transform so that it's centered.\n           * We want the center point between the left edge of the left most Thumb\n           * and the right edge of the right most Thumb.\n           */\n\n          var first = Math.min.apply(Math, offsetsX);\n          var last = Math.max.apply(Math, offsetsX);\n          var lastWidth = thumbs[overlaps[offsetsX.indexOf(last)]].getBoundingClientRect().width;\n          newStyle.left = Math.abs(first - (last + lastWidth)) / 2 + \"px\";\n          newStyle.transform = 'translate(-50%, 0)';\n        } else {\n          // If the Thumb isn't the left most Thumb, hide the Label!\n          newStyle.visibility = 'hidden';\n        }\n      } // Update the label value and style\n\n\n      setLabelValue(labelValue_1);\n      setLabelStyle(newStyle);\n    }\n  }, [rangeRef, values]);\n  return [labelValue, labelStyle];\n};","/*global define:false */\n\n/**\n * Copyright 2012-2017 Craig Campbell\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\n * Mousetrap is a simple keyboard shortcut library for Javascript with\n * no external dependencies\n *\n * @version 1.6.5\n * @url craig.is/killing/mice\n */\n(function (window, document, undefined) {\n  // Check if mousetrap is used inside browser, if not, return\n  if (!window) {\n    return;\n  }\n  /**\n   * mapping of special keycodes to their corresponding keys\n   *\n   * everything in this dictionary cannot use keypress events\n   * so it has to be here to map to the correct keycodes for\n   * keyup/keydown events\n   *\n   * @type {Object}\n   */\n\n\n  var _MAP = {\n    8: 'backspace',\n    9: 'tab',\n    13: 'enter',\n    16: 'shift',\n    17: 'ctrl',\n    18: 'alt',\n    20: 'capslock',\n    27: 'esc',\n    32: 'space',\n    33: 'pageup',\n    34: 'pagedown',\n    35: 'end',\n    36: 'home',\n    37: 'left',\n    38: 'up',\n    39: 'right',\n    40: 'down',\n    45: 'ins',\n    46: 'del',\n    91: 'meta',\n    93: 'meta',\n    224: 'meta'\n  };\n  /**\n   * mapping for special characters so they can support\n   *\n   * this dictionary is only used incase you want to bind a\n   * keyup or keydown event to one of these keys\n   *\n   * @type {Object}\n   */\n\n  var _KEYCODE_MAP = {\n    106: '*',\n    107: '+',\n    109: '-',\n    110: '.',\n    111: '/',\n    186: ';',\n    187: '=',\n    188: ',',\n    189: '-',\n    190: '.',\n    191: '/',\n    192: '`',\n    219: '[',\n    220: '\\\\',\n    221: ']',\n    222: '\\''\n  };\n  /**\n   * this is a mapping of keys that require shift on a US keypad\n   * back to the non shift equivelents\n   *\n   * this is so you can use keyup events with these keys\n   *\n   * note that this will only work reliably on US keyboards\n   *\n   * @type {Object}\n   */\n\n  var _SHIFT_MAP = {\n    '~': '`',\n    '!': '1',\n    '@': '2',\n    '#': '3',\n    '$': '4',\n    '%': '5',\n    '^': '6',\n    '&': '7',\n    '*': '8',\n    '(': '9',\n    ')': '0',\n    '_': '-',\n    '+': '=',\n    ':': ';',\n    '\\\"': '\\'',\n    '<': ',',\n    '>': '.',\n    '?': '/',\n    '|': '\\\\'\n  };\n  /**\n   * this is a list of special strings you can use to map\n   * to modifier keys when you specify your keyboard shortcuts\n   *\n   * @type {Object}\n   */\n\n  var _SPECIAL_ALIASES = {\n    'option': 'alt',\n    'command': 'meta',\n    'return': 'enter',\n    'escape': 'esc',\n    'plus': '+',\n    'mod': /Mac|iPod|iPhone|iPad/.test(navigator.platform) ? 'meta' : 'ctrl'\n  };\n  /**\n   * variable to store the flipped version of _MAP from above\n   * needed to check if we should use keypress or not when no action\n   * is specified\n   *\n   * @type {Object|undefined}\n   */\n\n  var _REVERSE_MAP;\n  /**\n   * loop through the f keys, f1 to f19 and add them to the map\n   * programatically\n   */\n\n\n  for (var i = 1; i < 20; ++i) {\n    _MAP[111 + i] = 'f' + i;\n  }\n  /**\n   * loop through to map numbers on the numeric keypad\n   */\n\n\n  for (i = 0; i <= 9; ++i) {\n    // This needs to use a string cause otherwise since 0 is falsey\n    // mousetrap will never fire for numpad 0 pressed as part of a keydown\n    // event.\n    //\n    // @see https://github.com/ccampbell/mousetrap/pull/258\n    _MAP[i + 96] = i.toString();\n  }\n  /**\n   * cross browser add event method\n   *\n   * @param {Element|HTMLDocument} object\n   * @param {string} type\n   * @param {Function} callback\n   * @returns void\n   */\n\n\n  function _addEvent(object, type, callback) {\n    if (object.addEventListener) {\n      object.addEventListener(type, callback, false);\n      return;\n    }\n\n    object.attachEvent('on' + type, callback);\n  }\n  /**\n   * takes the event and returns the key character\n   *\n   * @param {Event} e\n   * @return {string}\n   */\n\n\n  function _characterFromEvent(e) {\n    // for keypress events we should return the character as is\n    if (e.type == 'keypress') {\n      var character = String.fromCharCode(e.which); // if the shift key is not pressed then it is safe to assume\n      // that we want the character to be lowercase.  this means if\n      // you accidentally have caps lock on then your key bindings\n      // will continue to work\n      //\n      // the only side effect that might not be desired is if you\n      // bind something like 'A' cause you want to trigger an\n      // event when capital A is pressed caps lock will no longer\n      // trigger the event.  shift+a will though.\n\n      if (!e.shiftKey) {\n        character = character.toLowerCase();\n      }\n\n      return character;\n    } // for non keypress events the special maps are needed\n\n\n    if (_MAP[e.which]) {\n      return _MAP[e.which];\n    }\n\n    if (_KEYCODE_MAP[e.which]) {\n      return _KEYCODE_MAP[e.which];\n    } // if it is not in the special map\n    // with keydown and keyup events the character seems to always\n    // come in as an uppercase character whether you are pressing shift\n    // or not.  we should make sure it is always lowercase for comparisons\n\n\n    return String.fromCharCode(e.which).toLowerCase();\n  }\n  /**\n   * checks if two arrays are equal\n   *\n   * @param {Array} modifiers1\n   * @param {Array} modifiers2\n   * @returns {boolean}\n   */\n\n\n  function _modifiersMatch(modifiers1, modifiers2) {\n    return modifiers1.sort().join(',') === modifiers2.sort().join(',');\n  }\n  /**\n   * takes a key event and figures out what the modifiers are\n   *\n   * @param {Event} e\n   * @returns {Array}\n   */\n\n\n  function _eventModifiers(e) {\n    var modifiers = [];\n\n    if (e.shiftKey) {\n      modifiers.push('shift');\n    }\n\n    if (e.altKey) {\n      modifiers.push('alt');\n    }\n\n    if (e.ctrlKey) {\n      modifiers.push('ctrl');\n    }\n\n    if (e.metaKey) {\n      modifiers.push('meta');\n    }\n\n    return modifiers;\n  }\n  /**\n   * prevents default for this event\n   *\n   * @param {Event} e\n   * @returns void\n   */\n\n\n  function _preventDefault(e) {\n    if (e.preventDefault) {\n      e.preventDefault();\n      return;\n    }\n\n    e.returnValue = false;\n  }\n  /**\n   * stops propogation for this event\n   *\n   * @param {Event} e\n   * @returns void\n   */\n\n\n  function _stopPropagation(e) {\n    if (e.stopPropagation) {\n      e.stopPropagation();\n      return;\n    }\n\n    e.cancelBubble = true;\n  }\n  /**\n   * determines if the keycode specified is a modifier key or not\n   *\n   * @param {string} key\n   * @returns {boolean}\n   */\n\n\n  function _isModifier(key) {\n    return key == 'shift' || key == 'ctrl' || key == 'alt' || key == 'meta';\n  }\n  /**\n   * reverses the map lookup so that we can look for specific keys\n   * to see what can and can't use keypress\n   *\n   * @return {Object}\n   */\n\n\n  function _getReverseMap() {\n    if (!_REVERSE_MAP) {\n      _REVERSE_MAP = {};\n\n      for (var key in _MAP) {\n        // pull out the numeric keypad from here cause keypress should\n        // be able to detect the keys from the character\n        if (key > 95 && key < 112) {\n          continue;\n        }\n\n        if (_MAP.hasOwnProperty(key)) {\n          _REVERSE_MAP[_MAP[key]] = key;\n        }\n      }\n    }\n\n    return _REVERSE_MAP;\n  }\n  /**\n   * picks the best action based on the key combination\n   *\n   * @param {string} key - character for key\n   * @param {Array} modifiers\n   * @param {string=} action passed in\n   */\n\n\n  function _pickBestAction(key, modifiers, action) {\n    // if no action was picked in we should try to pick the one\n    // that we think would work best for this key\n    if (!action) {\n      action = _getReverseMap()[key] ? 'keydown' : 'keypress';\n    } // modifier keys don't work as expected with keypress,\n    // switch to keydown\n\n\n    if (action == 'keypress' && modifiers.length) {\n      action = 'keydown';\n    }\n\n    return action;\n  }\n  /**\n   * Converts from a string key combination to an array\n   *\n   * @param  {string} combination like \"command+shift+l\"\n   * @return {Array}\n   */\n\n\n  function _keysFromString(combination) {\n    if (combination === '+') {\n      return ['+'];\n    }\n\n    combination = combination.replace(/\\+{2}/g, '+plus');\n    return combination.split('+');\n  }\n  /**\n   * Gets info for a specific key combination\n   *\n   * @param  {string} combination key combination (\"command+s\" or \"a\" or \"*\")\n   * @param  {string=} action\n   * @returns {Object}\n   */\n\n\n  function _getKeyInfo(combination, action) {\n    var keys;\n    var key;\n    var i;\n    var modifiers = []; // take the keys from this pattern and figure out what the actual\n    // pattern is all about\n\n    keys = _keysFromString(combination);\n\n    for (i = 0; i < keys.length; ++i) {\n      key = keys[i]; // normalize key names\n\n      if (_SPECIAL_ALIASES[key]) {\n        key = _SPECIAL_ALIASES[key];\n      } // if this is not a keypress event then we should\n      // be smart about using shift keys\n      // this will only work for US keyboards however\n\n\n      if (action && action != 'keypress' && _SHIFT_MAP[key]) {\n        key = _SHIFT_MAP[key];\n        modifiers.push('shift');\n      } // if this key is a modifier then add it to the list of modifiers\n\n\n      if (_isModifier(key)) {\n        modifiers.push(key);\n      }\n    } // depending on what the key combination is\n    // we will try to pick the best event for it\n\n\n    action = _pickBestAction(key, modifiers, action);\n    return {\n      key: key,\n      modifiers: modifiers,\n      action: action\n    };\n  }\n\n  function _belongsTo(element, ancestor) {\n    if (element === null || element === document) {\n      return false;\n    }\n\n    if (element === ancestor) {\n      return true;\n    }\n\n    return _belongsTo(element.parentNode, ancestor);\n  }\n\n  function Mousetrap(targetElement) {\n    var self = this;\n    targetElement = targetElement || document;\n\n    if (!(self instanceof Mousetrap)) {\n      return new Mousetrap(targetElement);\n    }\n    /**\n     * element to attach key events to\n     *\n     * @type {Element}\n     */\n\n\n    self.target = targetElement;\n    /**\n     * a list of all the callbacks setup via Mousetrap.bind()\n     *\n     * @type {Object}\n     */\n\n    self._callbacks = {};\n    /**\n     * direct map of string combinations to callbacks used for trigger()\n     *\n     * @type {Object}\n     */\n\n    self._directMap = {};\n    /**\n     * keeps track of what level each sequence is at since multiple\n     * sequences can start out with the same sequence\n     *\n     * @type {Object}\n     */\n\n    var _sequenceLevels = {};\n    /**\n     * variable to store the setTimeout call\n     *\n     * @type {null|number}\n     */\n\n    var _resetTimer;\n    /**\n     * temporary state where we will ignore the next keyup\n     *\n     * @type {boolean|string}\n     */\n\n\n    var _ignoreNextKeyup = false;\n    /**\n     * temporary state where we will ignore the next keypress\n     *\n     * @type {boolean}\n     */\n\n    var _ignoreNextKeypress = false;\n    /**\n     * are we currently inside of a sequence?\n     * type of action (\"keyup\" or \"keydown\" or \"keypress\") or false\n     *\n     * @type {boolean|string}\n     */\n\n    var _nextExpectedAction = false;\n    /**\n     * resets all sequence counters except for the ones passed in\n     *\n     * @param {Object} doNotReset\n     * @returns void\n     */\n\n    function _resetSequences(doNotReset) {\n      doNotReset = doNotReset || {};\n      var activeSequences = false,\n          key;\n\n      for (key in _sequenceLevels) {\n        if (doNotReset[key]) {\n          activeSequences = true;\n          continue;\n        }\n\n        _sequenceLevels[key] = 0;\n      }\n\n      if (!activeSequences) {\n        _nextExpectedAction = false;\n      }\n    }\n    /**\n     * finds all callbacks that match based on the keycode, modifiers,\n     * and action\n     *\n     * @param {string} character\n     * @param {Array} modifiers\n     * @param {Event|Object} e\n     * @param {string=} sequenceName - name of the sequence we are looking for\n     * @param {string=} combination\n     * @param {number=} level\n     * @returns {Array}\n     */\n\n\n    function _getMatches(character, modifiers, e, sequenceName, combination, level) {\n      var i;\n      var callback;\n      var matches = [];\n      var action = e.type; // if there are no events related to this keycode\n\n      if (!self._callbacks[character]) {\n        return [];\n      } // if a modifier key is coming up on its own we should allow it\n\n\n      if (action == 'keyup' && _isModifier(character)) {\n        modifiers = [character];\n      } // loop through all callbacks for the key that was pressed\n      // and see if any of them match\n\n\n      for (i = 0; i < self._callbacks[character].length; ++i) {\n        callback = self._callbacks[character][i]; // if a sequence name is not specified, but this is a sequence at\n        // the wrong level then move onto the next match\n\n        if (!sequenceName && callback.seq && _sequenceLevels[callback.seq] != callback.level) {\n          continue;\n        } // if the action we are looking for doesn't match the action we got\n        // then we should keep going\n\n\n        if (action != callback.action) {\n          continue;\n        } // if this is a keypress event and the meta key and control key\n        // are not pressed that means that we need to only look at the\n        // character, otherwise check the modifiers as well\n        //\n        // chrome will not fire a keypress if meta or control is down\n        // safari will fire a keypress if meta or meta+shift is down\n        // firefox will fire a keypress if meta or control is down\n\n\n        if (action == 'keypress' && !e.metaKey && !e.ctrlKey || _modifiersMatch(modifiers, callback.modifiers)) {\n          // when you bind a combination or sequence a second time it\n          // should overwrite the first one.  if a sequenceName or\n          // combination is specified in this call it does just that\n          //\n          // @todo make deleting its own method?\n          var deleteCombo = !sequenceName && callback.combo == combination;\n          var deleteSequence = sequenceName && callback.seq == sequenceName && callback.level == level;\n\n          if (deleteCombo || deleteSequence) {\n            self._callbacks[character].splice(i, 1);\n          }\n\n          matches.push(callback);\n        }\n      }\n\n      return matches;\n    }\n    /**\n     * actually calls the callback function\n     *\n     * if your callback function returns false this will use the jquery\n     * convention - prevent default and stop propogation on the event\n     *\n     * @param {Function} callback\n     * @param {Event} e\n     * @returns void\n     */\n\n\n    function _fireCallback(callback, e, combo, sequence) {\n      // if this event should not happen stop here\n      if (self.stopCallback(e, e.target || e.srcElement, combo, sequence)) {\n        return;\n      }\n\n      if (callback(e, combo) === false) {\n        _preventDefault(e);\n\n        _stopPropagation(e);\n      }\n    }\n    /**\n     * handles a character key event\n     *\n     * @param {string} character\n     * @param {Array} modifiers\n     * @param {Event} e\n     * @returns void\n     */\n\n\n    self._handleKey = function (character, modifiers, e) {\n      var callbacks = _getMatches(character, modifiers, e);\n\n      var i;\n      var doNotReset = {};\n      var maxLevel = 0;\n      var processedSequenceCallback = false; // Calculate the maxLevel for sequences so we can only execute the longest callback sequence\n\n      for (i = 0; i < callbacks.length; ++i) {\n        if (callbacks[i].seq) {\n          maxLevel = Math.max(maxLevel, callbacks[i].level);\n        }\n      } // loop through matching callbacks for this key event\n\n\n      for (i = 0; i < callbacks.length; ++i) {\n        // fire for all sequence callbacks\n        // this is because if for example you have multiple sequences\n        // bound such as \"g i\" and \"g t\" they both need to fire the\n        // callback for matching g cause otherwise you can only ever\n        // match the first one\n        if (callbacks[i].seq) {\n          // only fire callbacks for the maxLevel to prevent\n          // subsequences from also firing\n          //\n          // for example 'a option b' should not cause 'option b' to fire\n          // even though 'option b' is part of the other sequence\n          //\n          // any sequences that do not match here will be discarded\n          // below by the _resetSequences call\n          if (callbacks[i].level != maxLevel) {\n            continue;\n          }\n\n          processedSequenceCallback = true; // keep a list of which sequences were matches for later\n\n          doNotReset[callbacks[i].seq] = 1;\n\n          _fireCallback(callbacks[i].callback, e, callbacks[i].combo, callbacks[i].seq);\n\n          continue;\n        } // if there were no sequence matches but we are still here\n        // that means this is a regular match so we should fire that\n\n\n        if (!processedSequenceCallback) {\n          _fireCallback(callbacks[i].callback, e, callbacks[i].combo);\n        }\n      } // if the key you pressed matches the type of sequence without\n      // being a modifier (ie \"keyup\" or \"keypress\") then we should\n      // reset all sequences that were not matched by this event\n      //\n      // this is so, for example, if you have the sequence \"h a t\" and you\n      // type \"h e a r t\" it does not match.  in this case the \"e\" will\n      // cause the sequence to reset\n      //\n      // modifier keys are ignored because you can have a sequence\n      // that contains modifiers such as \"enter ctrl+space\" and in most\n      // cases the modifier key will be pressed before the next key\n      //\n      // also if you have a sequence such as \"ctrl+b a\" then pressing the\n      // \"b\" key will trigger a \"keypress\" and a \"keydown\"\n      //\n      // the \"keydown\" is expected when there is a modifier, but the\n      // \"keypress\" ends up matching the _nextExpectedAction since it occurs\n      // after and that causes the sequence to reset\n      //\n      // we ignore keypresses in a sequence that directly follow a keydown\n      // for the same character\n\n\n      var ignoreThisKeypress = e.type == 'keypress' && _ignoreNextKeypress;\n\n      if (e.type == _nextExpectedAction && !_isModifier(character) && !ignoreThisKeypress) {\n        _resetSequences(doNotReset);\n      }\n\n      _ignoreNextKeypress = processedSequenceCallback && e.type == 'keydown';\n    };\n    /**\n     * handles a keydown event\n     *\n     * @param {Event} e\n     * @returns void\n     */\n\n\n    function _handleKeyEvent(e) {\n      // normalize e.which for key events\n      // @see http://stackoverflow.com/questions/4285627/javascript-keycode-vs-charcode-utter-confusion\n      if (typeof e.which !== 'number') {\n        e.which = e.keyCode;\n      }\n\n      var character = _characterFromEvent(e); // no character found then stop\n\n\n      if (!character) {\n        return;\n      } // need to use === for the character check because the character can be 0\n\n\n      if (e.type == 'keyup' && _ignoreNextKeyup === character) {\n        _ignoreNextKeyup = false;\n        return;\n      }\n\n      self.handleKey(character, _eventModifiers(e), e);\n    }\n    /**\n     * called to set a 1 second timeout on the specified sequence\n     *\n     * this is so after each key press in the sequence you have 1 second\n     * to press the next key before you have to start over\n     *\n     * @returns void\n     */\n\n\n    function _resetSequenceTimer() {\n      clearTimeout(_resetTimer);\n      _resetTimer = setTimeout(_resetSequences, 1000);\n    }\n    /**\n     * binds a key sequence to an event\n     *\n     * @param {string} combo - combo specified in bind call\n     * @param {Array} keys\n     * @param {Function} callback\n     * @param {string=} action\n     * @returns void\n     */\n\n\n    function _bindSequence(combo, keys, callback, action) {\n      // start off by adding a sequence level record for this combination\n      // and setting the level to 0\n      _sequenceLevels[combo] = 0;\n      /**\n       * callback to increase the sequence level for this sequence and reset\n       * all other sequences that were active\n       *\n       * @param {string} nextAction\n       * @returns {Function}\n       */\n\n      function _increaseSequence(nextAction) {\n        return function () {\n          _nextExpectedAction = nextAction;\n          ++_sequenceLevels[combo];\n\n          _resetSequenceTimer();\n        };\n      }\n      /**\n       * wraps the specified callback inside of another function in order\n       * to reset all sequence counters as soon as this sequence is done\n       *\n       * @param {Event} e\n       * @returns void\n       */\n\n\n      function _callbackAndReset(e) {\n        _fireCallback(callback, e, combo); // we should ignore the next key up if the action is key down\n        // or keypress.  this is so if you finish a sequence and\n        // release the key the final key will not trigger a keyup\n\n\n        if (action !== 'keyup') {\n          _ignoreNextKeyup = _characterFromEvent(e);\n        } // weird race condition if a sequence ends with the key\n        // another sequence begins with\n\n\n        setTimeout(_resetSequences, 10);\n      } // loop through keys one at a time and bind the appropriate callback\n      // function.  for any key leading up to the final one it should\n      // increase the sequence. after the final, it should reset all sequences\n      //\n      // if an action is specified in the original bind call then that will\n      // be used throughout.  otherwise we will pass the action that the\n      // next key in the sequence should match.  this allows a sequence\n      // to mix and match keypress and keydown events depending on which\n      // ones are better suited to the key provided\n\n\n      for (var i = 0; i < keys.length; ++i) {\n        var isFinal = i + 1 === keys.length;\n        var wrappedCallback = isFinal ? _callbackAndReset : _increaseSequence(action || _getKeyInfo(keys[i + 1]).action);\n\n        _bindSingle(keys[i], wrappedCallback, action, combo, i);\n      }\n    }\n    /**\n     * binds a single keyboard combination\n     *\n     * @param {string} combination\n     * @param {Function} callback\n     * @param {string=} action\n     * @param {string=} sequenceName - name of sequence if part of sequence\n     * @param {number=} level - what part of the sequence the command is\n     * @returns void\n     */\n\n\n    function _bindSingle(combination, callback, action, sequenceName, level) {\n      // store a direct mapped reference for use with Mousetrap.trigger\n      self._directMap[combination + ':' + action] = callback; // make sure multiple spaces in a row become a single space\n\n      combination = combination.replace(/\\s+/g, ' ');\n      var sequence = combination.split(' ');\n      var info; // if this pattern is a sequence of keys then run through this method\n      // to reprocess each pattern one key at a time\n\n      if (sequence.length > 1) {\n        _bindSequence(combination, sequence, callback, action);\n\n        return;\n      }\n\n      info = _getKeyInfo(combination, action); // make sure to initialize array if this is the first time\n      // a callback is added for this key\n\n      self._callbacks[info.key] = self._callbacks[info.key] || []; // remove an existing match if there is one\n\n      _getMatches(info.key, info.modifiers, {\n        type: info.action\n      }, sequenceName, combination, level); // add this call back to the array\n      // if it is a sequence put it at the beginning\n      // if not put it at the end\n      //\n      // this is important because the way these are processed expects\n      // the sequence ones to come first\n\n\n      self._callbacks[info.key][sequenceName ? 'unshift' : 'push']({\n        callback: callback,\n        modifiers: info.modifiers,\n        action: info.action,\n        seq: sequenceName,\n        level: level,\n        combo: combination\n      });\n    }\n    /**\n     * binds multiple combinations to the same callback\n     *\n     * @param {Array} combinations\n     * @param {Function} callback\n     * @param {string|undefined} action\n     * @returns void\n     */\n\n\n    self._bindMultiple = function (combinations, callback, action) {\n      for (var i = 0; i < combinations.length; ++i) {\n        _bindSingle(combinations[i], callback, action);\n      }\n    }; // start!\n\n\n    _addEvent(targetElement, 'keypress', _handleKeyEvent);\n\n    _addEvent(targetElement, 'keydown', _handleKeyEvent);\n\n    _addEvent(targetElement, 'keyup', _handleKeyEvent);\n  }\n  /**\n   * binds an event to mousetrap\n   *\n   * can be a single key, a combination of keys separated with +,\n   * an array of keys, or a sequence of keys separated by spaces\n   *\n   * be sure to list the modifier keys first to make sure that the\n   * correct key ends up getting bound (the last key in the pattern)\n   *\n   * @param {string|Array} keys\n   * @param {Function} callback\n   * @param {string=} action - 'keypress', 'keydown', or 'keyup'\n   * @returns void\n   */\n\n\n  Mousetrap.prototype.bind = function (keys, callback, action) {\n    var self = this;\n    keys = keys instanceof Array ? keys : [keys];\n\n    self._bindMultiple.call(self, keys, callback, action);\n\n    return self;\n  };\n  /**\n   * unbinds an event to mousetrap\n   *\n   * the unbinding sets the callback function of the specified key combo\n   * to an empty function and deletes the corresponding key in the\n   * _directMap dict.\n   *\n   * TODO: actually remove this from the _callbacks dictionary instead\n   * of binding an empty function\n   *\n   * the keycombo+action has to be exactly the same as\n   * it was defined in the bind method\n   *\n   * @param {string|Array} keys\n   * @param {string} action\n   * @returns void\n   */\n\n\n  Mousetrap.prototype.unbind = function (keys, action) {\n    var self = this;\n    return self.bind.call(self, keys, function () {}, action);\n  };\n  /**\n   * triggers an event that has already been bound\n   *\n   * @param {string} keys\n   * @param {string=} action\n   * @returns void\n   */\n\n\n  Mousetrap.prototype.trigger = function (keys, action) {\n    var self = this;\n\n    if (self._directMap[keys + ':' + action]) {\n      self._directMap[keys + ':' + action]({}, keys);\n    }\n\n    return self;\n  };\n  /**\n   * resets the library back to its initial state.  this is useful\n   * if you want to clear out the current keyboard shortcuts and bind\n   * new ones - for example if you switch to another page\n   *\n   * @returns void\n   */\n\n\n  Mousetrap.prototype.reset = function () {\n    var self = this;\n    self._callbacks = {};\n    self._directMap = {};\n    return self;\n  };\n  /**\n   * should we stop this event before firing off callbacks\n   *\n   * @param {Event} e\n   * @param {Element} element\n   * @return {boolean}\n   */\n\n\n  Mousetrap.prototype.stopCallback = function (e, element) {\n    var self = this; // if the element has the class \"mousetrap\" then no need to stop\n\n    if ((' ' + element.className + ' ').indexOf(' mousetrap ') > -1) {\n      return false;\n    }\n\n    if (_belongsTo(element, self.target)) {\n      return false;\n    } // Events originating from a shadow DOM are re-targetted and `e.target` is the shadow host,\n    // not the initial event target in the shadow tree. Note that not all events cross the\n    // shadow boundary.\n    // For shadow trees with `mode: 'open'`, the initial event target is the first element in\n    // the event’s composed path. For shadow trees with `mode: 'closed'`, the initial event\n    // target cannot be obtained.\n\n\n    if ('composedPath' in e && typeof e.composedPath === 'function') {\n      // For open shadow trees, update `element` so that the following check works.\n      var initialEventTarget = e.composedPath()[0];\n\n      if (initialEventTarget !== e.target) {\n        element = initialEventTarget;\n      }\n    } // stop for input, select, and textarea\n\n\n    return element.tagName == 'INPUT' || element.tagName == 'SELECT' || element.tagName == 'TEXTAREA' || element.isContentEditable;\n  };\n  /**\n   * exposes _handleKey publicly so it can be overwritten by extensions\n   */\n\n\n  Mousetrap.prototype.handleKey = function () {\n    var self = this;\n    return self._handleKey.apply(self, arguments);\n  };\n  /**\n   * allow custom key mappings\n   */\n\n\n  Mousetrap.addKeycodes = function (object) {\n    for (var key in object) {\n      if (object.hasOwnProperty(key)) {\n        _MAP[key] = object[key];\n      }\n    }\n\n    _REVERSE_MAP = null;\n  };\n  /**\n   * Init the global mousetrap functions\n   *\n   * This method is needed to allow the global mousetrap functions to work\n   * now that mousetrap is a constructor function.\n   */\n\n\n  Mousetrap.init = function () {\n    var documentMousetrap = Mousetrap(document);\n\n    for (var method in documentMousetrap) {\n      if (method.charAt(0) !== '_') {\n        Mousetrap[method] = function (method) {\n          return function () {\n            return documentMousetrap[method].apply(documentMousetrap, arguments);\n          };\n        }(method);\n      }\n    }\n  };\n\n  Mousetrap.init(); // expose mousetrap to the global object\n\n  window.Mousetrap = Mousetrap; // expose as a common js module\n\n  if (typeof module !== 'undefined' && module.exports) {\n    module.exports = Mousetrap;\n  } // expose mousetrap as an AMD module\n\n\n  if (typeof define === 'function' && define.amd) {\n    define(function () {\n      return Mousetrap;\n    });\n  }\n})(typeof window !== 'undefined' ? window : null, typeof window !== 'undefined' ? document : null);","function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\nfunction _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\"); }\n\nfunction _iterableToArrayLimit(arr, i) { var _i = arr == null ? 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(r = o, e(Number(t), n, i)) : (i++, t);\n        }), t.focus(), t.setSelectionRange(r, r), o.preventDefault(), t.dispatchEvent(new Event(\"input\"));\n      }\n\n      a(t, \"focus\", function () {\n        return a(window, \"wheel\", o, {\n          passive: !1\n        });\n      }), a(t, \"blur\", function () {\n        return l(window, \"wheel\", o);\n      });\n    }\n\n    var v = o(0);\n    var b = Math.min,\n        y = Math.max,\n        g = Math.floor,\n        _ = Math.round;\n\n    function w(t, e, o) {\n      e /= 100, o /= 100;\n      var n = g(t = t / 360 * 6),\n          i = t - n,\n          r = o * (1 - e),\n          s = o * (1 - i * e),\n          c = o * (1 - (1 - i) * e),\n          a = n % 6;\n      return [255 * [o, s, r, r, c, o][a], 255 * [c, o, o, s, r, r][a], 255 * [r, r, c, o, o, s][a]];\n    }\n\n    function A(t, e, o) {\n      var n = (2 - (e /= 100)) * (o /= 100) / 2;\n      return 0 !== n && (e = 1 === n ? 0 : n < .5 ? e * o / (2 * n) : e * o / (2 - 2 * n)), [t, 100 * e, 100 * n];\n    }\n\n    function C(t, e, o) {\n      var n = b(t /= 255, e /= 255, o /= 255),\n          i = y(t, e, o),\n          r = i - n;\n      var s, c;\n      if (0 === r) s = c = 0;else {\n        c = r / i;\n\n        var _n2 = ((i - t) / 6 + r / 2) / r,\n            _a = ((i - e) / 6 + r / 2) / r,\n            _l = ((i - o) / 6 + r / 2) / r;\n\n        t === i ? s = _l - _a : e === i ? s = 1 / 3 + _n2 - _l : o === i && (s = 2 / 3 + _a - _n2), s < 0 ? s += 1 : s > 1 && (s -= 1);\n      }\n      return [360 * s, 100 * c, 100 * i];\n    }\n\n    function k(t, e, o, n) {\n      return e /= 100, o /= 100, _toConsumableArray(C(255 * (1 - b(1, (t /= 100) * (1 - (n /= 100)) + n)), 255 * (1 - b(1, e * (1 - n) + n)), 255 * (1 - b(1, o * (1 - n) + n))));\n    }\n\n    function S(t, e, o) {\n      return e /= 100, [t, 2 * (e *= (o /= 100) < .5 ? o : 1 - o) / (o + e) * 100, 100 * (o + e)];\n    }\n\n    function O(t) {\n      return C.apply(void 0, _toConsumableArray(t.match(/.{2}/g).map(function (t) {\n        return parseInt(t, 16);\n      })));\n    }\n\n    function j(t) {\n      t = t.match(/^[a-zA-Z]+$/) ? function (t) {\n        if (\"black\" === t.toLowerCase()) return \"#000\";\n        var e = document.createElement(\"canvas\").getContext(\"2d\");\n        return e.fillStyle = t, \"#000\" === e.fillStyle ? null : e.fillStyle;\n      }(t) : t;\n\n      var e = {\n        cmyk: /^cmyk[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]+([\\d.]+)/i,\n        rgba: /^((rgba)|rgb)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]*?([\\d.]+|$)/i,\n        hsla: /^((hsla)|hsl)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]*?([\\d.]+|$)/i,\n        hsva: /^((hsva)|hsv)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]+([\\d.]+)[\\D]*?([\\d.]+|$)/i,\n        hexa: /^#?(([\\dA-Fa-f]{3,4})|([\\dA-Fa-f]{6})|([\\dA-Fa-f]{8}))$/i\n      },\n          o = function o(t) {\n        return t.map(function (t) {\n          return /^(|\\d+)\\.\\d+|\\d+$/.test(t) ? Number(t) : void 0;\n        });\n      };\n\n      var n;\n\n      t: for (var _i2 in e) {\n        if (!(n = e[_i2].exec(t))) continue;\n\n        var _r = function _r(t) {\n          return !!n[2] == (\"number\" == typeof t);\n        };\n\n        switch (_i2) {\n          case \"cmyk\":\n            {\n              var _o2 = o(n),\n                  _o3 = _slicedToArray(_o2, 5),\n                  _t = _o3[1],\n                  _e3 = _o3[2],\n                  _r2 = _o3[3],\n                  _s2 = _o3[4];\n\n              if (_t > 100 || _e3 > 100 || _r2 > 100 || _s2 > 100) break t;\n              return {\n                values: k(_t, _e3, _r2, _s2),\n                type: _i2\n              };\n            }\n\n          case \"rgba\":\n            {\n              var _o4 = o(n),\n                  _o5 = _slicedToArray(_o4, 7),\n                  _t2 = _o5[3],\n                  _e4 = _o5[4],\n                  _s3 = _o5[5],\n                  _c = _o5[6];\n\n              if (_t2 > 255 || _e4 > 255 || _s3 > 255 || _c < 0 || _c > 1 || !_r(_c)) break t;\n              return {\n                values: [].concat(_toConsumableArray(C(_t2, _e4, _s3)), [_c]),\n                a: _c,\n                type: _i2\n              };\n            }\n\n          case \"hexa\":\n            {\n              var _n3 = n,\n                  _n4 = _slicedToArray(_n3, 2),\n                  _t3 = _n4[1];\n\n              4 !== _t3.length && 3 !== _t3.length || (_t3 = _t3.split(\"\").map(function (t) {\n                return t + t;\n              }).join(\"\"));\n\n              var _e5 = _t3.substring(0, 6);\n\n              var _o6 = _t3.substring(6);\n\n              return _o6 = _o6 ? parseInt(_o6, 16) / 255 : void 0, {\n                values: [].concat(_toConsumableArray(O(_e5)), [_o6]),\n                a: _o6,\n                type: _i2\n              };\n            }\n\n          case \"hsla\":\n            {\n              var _o7 = o(n),\n                  _o8 = _slicedToArray(_o7, 7),\n                  _t4 = _o8[3],\n                  _e6 = _o8[4],\n                  _s4 = _o8[5],\n                  _c2 = _o8[6];\n\n              if (_t4 > 360 || _e6 > 100 || _s4 > 100 || _c2 < 0 || _c2 > 1 || !_r(_c2)) break t;\n              return {\n                values: [].concat(_toConsumableArray(S(_t4, _e6, _s4)), [_c2]),\n                a: _c2,\n                type: _i2\n              };\n            }\n\n          case \"hsva\":\n            {\n              var _o9 = o(n),\n                  _o10 = _slicedToArray(_o9, 7),\n                  _t5 = _o10[3],\n                  _e7 = _o10[4],\n                  _s5 = _o10[5],\n                  _c3 = _o10[6];\n\n              if (_t5 > 360 || _e7 > 100 || _s5 > 100 || _c3 < 0 || _c3 > 1 || !_r(_c3)) break t;\n              return {\n                values: [_t5, _e7, _s5, _c3],\n                a: _c3,\n                type: _i2\n              };\n            }\n        }\n      }\n\n      return {\n        values: null,\n        type: null\n      };\n    }\n\n    function x() {\n      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;\n      var e = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n      var o = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;\n      var n = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 1;\n\n      var i = function i(t, e) {\n        return function () {\n          var o = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : -1;\n          return e(~o ? t.map(function (t) {\n            return Number(t.toFixed(o));\n          }) : t);\n        };\n      },\n          r = {\n        h: t,\n        s: e,\n        v: o,\n        a: n,\n        toHSVA: function toHSVA() {\n          var t = [r.h, r.s, r.v, r.a];\n          return t.toString = i(t, function (t) {\n            return \"hsva(\".concat(t[0], \", \").concat(t[1], \"%, \").concat(t[2], \"%, \").concat(r.a, \")\");\n          }), t;\n        },\n        toHSLA: function toHSLA() {\n          var t = [].concat(_toConsumableArray(A(r.h, r.s, r.v)), [r.a]);\n          return t.toString = i(t, function (t) {\n            return \"hsla(\".concat(t[0], \", \").concat(t[1], \"%, \").concat(t[2], \"%, \").concat(r.a, \")\");\n          }), t;\n        },\n        toRGBA: function toRGBA() {\n          var t = [].concat(_toConsumableArray(w(r.h, r.s, r.v)), [r.a]);\n          return t.toString = i(t, function (t) {\n            return \"rgba(\".concat(t[0], \", \").concat(t[1], \", \").concat(t[2], \", \").concat(r.a, \")\");\n          }), t;\n        },\n        toCMYK: function toCMYK() {\n          var t = function (t, e, o) {\n            var n = w(t, e, o),\n                i = n[0] / 255,\n                r = n[1] / 255,\n                s = n[2] / 255,\n                c = b(1 - i, 1 - r, 1 - s);\n            return [100 * (1 === c ? 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_n5 = _r3 || _s6 ? 1 : -1 : \"h\" === _o11 ? _n5 = _r3 || _s6 ? -1 : 1 : (_i3 = _r3 ? -1 : _c4 ? 1 : 0, _n5 = _a2 ? -1 : _s6 ? 1 : 0), e.update(E(e.cache.x + .01 * _n5), E(e.cache.y + .01 * _i3)), t.preventDefault();\n            } else i.startsWith(\"Arrow\") && (e.options.onstop(), t.preventDefault());\n          }\n        },\n        _tapstart: function _tapstart(t) {\n          a(document, [\"mouseup\", \"touchend\", \"touchcancel\"], e._tapstop), a(document, [\"mousemove\", \"touchmove\"], e._tapmove), t.preventDefault(), e._tapmove(t);\n        },\n        _tapmove: function _tapmove(t) {\n          var o = e.options,\n              n = e.cache,\n              i = o.lock,\n              r = o.element,\n              s = o.wrapper,\n              c = s.getBoundingClientRect();\n          var a = 0,\n              l = 0;\n\n          if (t) {\n            var _e8 = t && t.touches && t.touches[0];\n\n            a = t ? (_e8 || t).clientX : 0, l = t ? (_e8 || t).clientY : 0, a < c.left ? a = c.left : a > c.left + c.width && (a = c.left + c.width), l < c.top ? l = c.top : l > c.top + c.height && (l = c.top + c.height), a -= c.left, l -= c.top;\n          } else n && (a = n.x * c.width, l = n.y * c.height);\n\n          \"h\" !== i && (r.style.left = \"calc(\".concat(a / c.width * 100, \"% - \").concat(r.offsetWidth / 2, \"px)\")), \"v\" !== i && (r.style.top = \"calc(\".concat(l / c.height * 100, \"% - \").concat(r.offsetHeight / 2, \"px)\")), e.cache = {\n            x: a / c.width,\n            y: l / c.height\n          };\n          var p = E(a / c.width),\n              u = E(l / c.height);\n\n          switch (i) {\n            case \"v\":\n              return o.onchange(p);\n\n            case \"h\":\n              return o.onchange(u);\n\n            default:\n              return o.onchange(p, u);\n          }\n        },\n        _tapstop: function _tapstop() {\n          e.options.onstop(), l(document, [\"mouseup\", \"touchend\", \"touchcancel\"], e._tapstop), l(document, [\"mousemove\", \"touchmove\"], e._tapmove);\n        },\n        trigger: function trigger() {\n          e._tapmove();\n        },\n        update: function update() {\n          var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;\n          var o = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n\n          var _e$options$wrapper$ge = e.options.wrapper.getBoundingClientRect(),\n              n = _e$options$wrapper$ge.left,\n              i = _e$options$wrapper$ge.top,\n              r = _e$options$wrapper$ge.width,\n              s = _e$options$wrapper$ge.height;\n\n          \"h\" === e.options.lock && (o = t), e._tapmove({\n            clientX: n + r * t,\n            clientY: i + s * o\n          });\n        },\n        destroy: function destroy() {\n          var t = e.options,\n              o = e._tapstart,\n              n = e._keyboard;\n          l(document, [\"keydown\", \"keyup\"], n), l([t.wrapper, t.element], \"mousedown\", o), l([t.wrapper, t.element], \"touchstart\", o, {\n            passive: !1\n          });\n        }\n      },\n          o = e.options,\n          n = e._tapstart,\n          i = e._keyboard;\n      return a([o.wrapper, o.element], \"mousedown\", n), a([o.wrapper, o.element], \"touchstart\", n, {\n        passive: !1\n      }), a(document, [\"keydown\", \"keyup\"], i), e;\n    }\n\n    function P() {\n      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n      t = Object.assign({\n        onchange: function onchange() {\n          return 0;\n        },\n        className: \"\",\n        elements: []\n      }, t);\n      var e = a(t.elements, \"click\", function (e) {\n        t.elements.forEach(function (o) {\n          return o.classList[e.target === o ? \"add\" : \"remove\"](t.className);\n        }), t.onchange(e);\n      });\n      return {\n        destroy: function destroy() {\n          return l.apply(void 0, _toConsumableArray(e));\n        }\n      };\n    }\n\n    function B(_ref) {\n      var t = _ref.el,\n          e = _ref.reference,\n          _ref$padding = _ref.padding,\n          o = _ref$padding === void 0 ? 8 : _ref$padding;\n\n      var n = {\n        start: \"sme\",\n        middle: \"mse\",\n        end: \"ems\"\n      },\n          i = {\n        top: \"tbrl\",\n        right: \"rltb\",\n        bottom: \"btrl\",\n        left: \"lrbt\"\n      },\n          r = function () {\n        var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n        return function (e) {\n          var o = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : t[e];\n          if (o) return o;\n\n          var _e$split = e.split(\"-\"),\n              _e$split2 = _slicedToArray(_e$split, 2),\n              n = _e$split2[0],\n              _e$split2$ = _e$split2[1],\n              i = _e$split2$ === void 0 ? \"middle\" : _e$split2$,\n              r = \"top\" === n || \"bottom\" === n;\n\n          return t[e] = {\n            position: n,\n            variant: i,\n            isVertical: r\n          };\n        };\n      }();\n\n      return {\n        update: function update(s) {\n          var c = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : !1;\n\n          var _r4 = r(s),\n              a = _r4.position,\n              l = _r4.variant,\n              p = _r4.isVertical,\n              u = e.getBoundingClientRect(),\n              h = t.getBoundingClientRect(),\n              d = function d(t) {\n            return t ? {\n              t: u.top - h.height - o,\n              b: u.bottom + o\n            } : {\n              r: u.right + o,\n              l: u.left - h.width - o\n            };\n          },\n              f = function f(t) {\n            return t ? {\n              s: u.left + u.width - h.width,\n              m: -h.width / 2 + (u.left + u.width / 2),\n              e: u.left\n            } : {\n              s: u.bottom - h.height,\n              m: u.bottom - u.height / 2 - h.height / 2,\n              e: u.bottom - u.height\n            };\n          },\n              m = {},\n              v = function v(t, e, o) {\n            var n = \"top\" === o,\n                i = n ? h.height : h.width,\n                r = window[n ? \"innerHeight\" : \"innerWidth\"];\n\n            var _iterator3 = _createForOfIteratorHelper(t),\n                _step3;\n\n            try {\n              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {\n                var _n6 = _step3.value;\n\n                var _t6 = e[_n6],\n                    _s7 = m[o] = \"\".concat(_t6, \"px\");\n\n                if (_t6 > 0 && _t6 + i < r) return _s7;\n              }\n            } catch (err) {\n              _iterator3.e(err);\n            } finally {\n              _iterator3.f();\n            }\n\n            return null;\n          };\n\n          for (var _i4 = 0, _arr2 = [p, !p]; _i4 < _arr2.length; _i4++) {\n            var _e9 = _arr2[_i4];\n\n            var _o12 = _e9 ? \"top\" : \"left\",\n                _r5 = _e9 ? \"left\" : \"top\",\n                _s8 = v(i[a], d(_e9), _o12),\n                _c5 = v(n[l], f(_e9), _r5);\n\n            if (_s8 && _c5) return t.style[_r5] = _c5, void (t.style[_o12] = _s8);\n          }\n\n          c ? (t.style.top = \"\".concat((window.innerHeight - h.height) / 2, \"px\"), t.style.left = \"\".concat((window.innerWidth - h.width) / 2, \"px\")) : (t.style.left = m.left, t.style.top = m.top);\n        }\n      };\n    }\n\n    function H(t, e, o) {\n      return e in t ? Object.defineProperty(t, e, {\n        value: o,\n        enumerable: !0,\n        configurable: !0,\n        writable: !0\n      }) : t[e] = o, t;\n    }\n\n    var R = /*#__PURE__*/function () {\n      function R(t) {\n        var _this = this;\n\n        _classCallCheck(this, R);\n\n        H(this, \"_initializingActive\", !0), H(this, \"_recalc\", !0), H(this, \"_nanopop\", null), H(this, \"_root\", null), H(this, \"_color\", x()), H(this, \"_lastColor\", x()), H(this, \"_swatchColors\", []), H(this, \"_eventListener\", {\n          init: [],\n          save: [],\n          hide: [],\n          show: [],\n          clear: [],\n          change: [],\n          changestop: [],\n          cancel: [],\n          swatchselect: []\n        }), this.options = t = Object.assign({\n          appClass: null,\n          theme: \"classic\",\n          useAsButton: !1,\n          padding: 8,\n          disabled: !1,\n          comparison: !0,\n          closeOnScroll: !1,\n          outputPrecision: 0,\n          lockOpacity: !1,\n          autoReposition: !0,\n          container: \"body\",\n          components: {\n            interaction: {}\n          },\n          strings: {},\n          swatches: null,\n          inline: !1,\n          sliders: null,\n          default: \"#42445a\",\n          defaultRepresentation: null,\n          position: \"bottom-middle\",\n          adjustableNumbers: !0,\n          showAlways: !1,\n          closeWithKey: \"Escape\"\n        }, t);\n        var _t7 = t,\n            e = _t7.swatches,\n            o = _t7.components,\n            n = _t7.theme,\n            i = _t7.sliders,\n            r = _t7.lockOpacity,\n            s = _t7.padding;\n        [\"nano\", \"monolith\"].includes(n) && !i && (t.sliders = \"h\"), o.interaction || (o.interaction = {});\n        var c = o.preview,\n            a = o.opacity,\n            l = o.hue,\n            p = o.palette;\n        o.opacity = !r && a, o.palette = p || c || a || l, this._preBuild(), this._buildComponents(), this._bindEvents(), this._finalBuild(), e && e.length && e.forEach(function (t) {\n          return _this.addSwatch(t);\n        });\n        var _this$_root = this._root,\n            u = _this$_root.button,\n            h = _this$_root.app;\n        this._nanopop = B({\n          reference: u,\n          padding: s,\n          el: h\n        }), u.setAttribute(\"role\", \"button\"), u.setAttribute(\"aria-label\", \"toggle color picker dialog\");\n        var d = this;\n        requestAnimationFrame(function e() {\n          if (!h.offsetWidth && h.parentElement !== t.container) return requestAnimationFrame(e);\n          d.setColor(t.default), d._rePositioningPicker(), t.defaultRepresentation && (d._representation = t.defaultRepresentation, d.setColorRepresentation(d._representation)), t.showAlways && d.show(), d._initializingActive = !1, d._emit(\"init\");\n        });\n      }\n\n      _createClass(R, [{\n        key: \"_preBuild\",\n        value: function _preBuild() {\n          var t = this.options;\n\n          for (var _i5 = 0, _arr3 = [\"el\", \"container\"]; _i5 < _arr3.length; _i5++) {\n            var _e10 = _arr3[_i5];\n            t[_e10] = f(t[_e10]);\n          }\n\n          this._root = function (_ref2) {\n            var t = _ref2.components,\n                e = _ref2.strings,\n                o = _ref2.useAsButton,\n                n = _ref2.inline,\n                i = _ref2.appClass,\n                r = _ref2.theme,\n                s = _ref2.lockOpacity;\n\n            var c = function c(t) {\n              return t ? \"\" : 'style=\"display:none\" hidden';\n            },\n                a = h('\\n      <div :ref=\"root\" class=\"pickr\">\\n\\n        '.concat(o ? \"\" : '<button type=\"button\" :ref=\"button\" class=\"pcr-button\"></button>', '\\n\\n        <div :ref=\"app\" class=\"pcr-app ').concat(i || \"\", '\" data-theme=\"').concat(r, '\" ').concat(n ? 'style=\"position: unset\"' : \"\", ' aria-label=\"color picker dialog\" role=\"form\">\\n          <div class=\"pcr-selection\" ').concat(c(t.palette), '>\\n            <div :obj=\"preview\" class=\"pcr-color-preview\" ').concat(c(t.preview), '>\\n              <button type=\"button\" :ref=\"lastColor\" class=\"pcr-last-color\" aria-label=\"use previous color\"></button>\\n              <div :ref=\"currentColor\" class=\"pcr-current-color\"></div>\\n            </div>\\n\\n            <div :obj=\"palette\" class=\"pcr-color-palette\">\\n              <div :ref=\"picker\" class=\"pcr-picker\"></div>\\n              <div :ref=\"palette\" class=\"pcr-palette\" tabindex=\"0\" aria-label=\"color selection area\" role=\"listbox\"></div>\\n            </div>\\n\\n            <div :obj=\"hue\" class=\"pcr-color-chooser\" ').concat(c(t.hue), '>\\n              <div :ref=\"picker\" class=\"pcr-picker\"></div>\\n              <div :ref=\"slider\" class=\"pcr-hue pcr-slider\" tabindex=\"0\" aria-label=\"hue selection slider\" role=\"slider\"></div>\\n            </div>\\n\\n            <div :obj=\"opacity\" class=\"pcr-color-opacity\" ').concat(c(t.opacity), '>\\n              <div :ref=\"picker\" class=\"pcr-picker\"></div>\\n              <div :ref=\"slider\" class=\"pcr-opacity pcr-slider\" tabindex=\"0\" aria-label=\"opacity selection slider\" role=\"slider\"></div>\\n            </div>\\n          </div>\\n\\n          <div class=\"pcr-swatches ').concat(t.palette ? \"\" : \"pcr-last\", '\" :ref=\"swatches\"></div> \\n\\n          <div :obj=\"interaction\" class=\"pcr-interaction\" ').concat(c(Object.keys(t.interaction).length), '>\\n            <input :ref=\"result\" class=\"pcr-result\" type=\"text\" spellcheck=\"false\" ').concat(c(t.interaction.input), '>\\n\\n            <input :arr=\"options\" class=\"pcr-type\" data-type=\"HEXA\" value=\"').concat(s ? \"HEX\" : \"HEXA\", '\" type=\"button\" ').concat(c(t.interaction.hex), '>\\n            <input :arr=\"options\" class=\"pcr-type\" data-type=\"RGBA\" value=\"').concat(s ? \"RGB\" : \"RGBA\", '\" type=\"button\" ').concat(c(t.interaction.rgba), '>\\n            <input :arr=\"options\" class=\"pcr-type\" data-type=\"HSLA\" value=\"').concat(s ? \"HSL\" : \"HSLA\", '\" type=\"button\" ').concat(c(t.interaction.hsla), '>\\n            <input :arr=\"options\" class=\"pcr-type\" data-type=\"HSVA\" value=\"').concat(s ? \"HSV\" : \"HSVA\", '\" type=\"button\" ').concat(c(t.interaction.hsva), '>\\n            <input :arr=\"options\" class=\"pcr-type\" data-type=\"CMYK\" value=\"CMYK\" type=\"button\" ').concat(c(t.interaction.cmyk), '>\\n\\n            <input :ref=\"save\" class=\"pcr-save\" value=\"').concat(e.save || \"Save\", '\" type=\"button\" ').concat(c(t.interaction.save), ' aria-label=\"save and exit\">\\n            <input :ref=\"cancel\" class=\"pcr-cancel\" value=\"').concat(e.cancel || \"Cancel\", '\" type=\"button\" ').concat(c(t.interaction.cancel), ' aria-label=\"cancel and exit\">\\n            <input :ref=\"clear\" class=\"pcr-clear\" value=\"').concat(e.clear || \"Clear\", '\" type=\"button\" ').concat(c(t.interaction.clear), ' aria-label=\"clear and exit\">\\n          </div>\\n        </div>\\n      </div>\\n    ')),\n                l = a.interaction;\n\n            return l.options.find(function (t) {\n              return !t.hidden && !t.classList.add(\"active\");\n            }), l.type = function () {\n              return l.options.find(function (t) {\n                return t.classList.contains(\"active\");\n              });\n            }, a;\n          }(t), t.useAsButton && (this._root.button = t.el), t.container.appendChild(this._root.root);\n        }\n      }, {\n        key: \"_finalBuild\",\n        value: function _finalBuild() {\n          var t = this.options,\n              e = this._root;\n\n          if (t.container.removeChild(e.root), t.inline) {\n            var _o13 = t.el.parentElement;\n            t.el.nextSibling ? _o13.insertBefore(e.app, t.el.nextSibling) : _o13.appendChild(e.app);\n          } else t.container.appendChild(e.app);\n\n          t.useAsButton ? t.inline && t.el.remove() : t.el.parentNode.replaceChild(e.root, t.el), t.disabled && this.disable(), t.comparison || (e.button.style.transition = \"none\", t.useAsButton || (e.preview.lastColor.style.transition = \"none\")), this.hide();\n        }\n      }, {\n        key: \"_buildComponents\",\n        value: function _buildComponents() {\n          var _this2 = this;\n\n          var t = this,\n              e = this.options.components,\n              o = (t.options.sliders || \"v\").repeat(2),\n              _ref3 = o.match(/^[vh]+$/g) ? o : [],\n              _ref4 = _slicedToArray(_ref3, 2),\n              n = _ref4[0],\n              i = _ref4[1],\n              r = function r() {\n            return _this2._color || (_this2._color = _this2._lastColor.clone());\n          },\n              s = {\n            palette: L({\n              element: t._root.palette.picker,\n              wrapper: t._root.palette.palette,\n              onstop: function onstop() {\n                return t._emit(\"changestop\", t);\n              },\n              onchange: function onchange(o, n) {\n                if (!e.palette) return;\n                var i = r(),\n                    s = t._root,\n                    c = t.options,\n                    _s$preview = s.preview,\n                    a = _s$preview.lastColor,\n                    l = _s$preview.currentColor;\n                t._recalc && (i.s = 100 * o, i.v = 100 - 100 * n, i.v < 0 && (i.v = 0), t._updateOutput());\n                var p = i.toRGBA().toString(0);\n                this.element.style.background = p, this.wrapper.style.background = \"\\n                        linear-gradient(to top, rgba(0, 0, 0, \".concat(i.a, \"), transparent),\\n                        linear-gradient(to left, hsla(\").concat(i.h, \", 100%, 50%, \").concat(i.a, \"), rgba(255, 255, 255, \").concat(i.a, \"))\\n                    \"), c.comparison ? c.useAsButton || t._lastColor || (a.style.color = p) : (s.button.style.color = p, s.button.classList.remove(\"clear\"));\n                var u = i.toHEXA().toString();\n\n                var _iterator4 = _createForOfIteratorHelper(t._swatchColors),\n                    _step4;\n\n                try {\n                  for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {\n                    var _ref6 = _step4.value;\n                    var _e11 = _ref6.el;\n                    var _o14 = _ref6.color;\n\n                    _e11.classList[u === _o14.toHEXA().toString() ? \"add\" : \"remove\"](\"pcr-active\");\n                  }\n                } catch (err) {\n                  _iterator4.e(err);\n                } finally {\n                  _iterator4.f();\n                }\n\n                l.style.color = p;\n              }\n            }),\n            hue: L({\n              lock: \"v\" === i ? \"h\" : \"v\",\n              element: t._root.hue.picker,\n              wrapper: t._root.hue.slider,\n              onstop: function onstop() {\n                return t._emit(\"changestop\", t);\n              },\n              onchange: function onchange(o) {\n                if (!e.hue || !e.palette) return;\n                var n = r();\n                t._recalc && (n.h = 360 * o), this.element.style.backgroundColor = \"hsl(\".concat(n.h, \", 100%, 50%)\"), s.palette.trigger();\n              }\n            }),\n            opacity: L({\n              lock: \"v\" === n ? \"h\" : \"v\",\n              element: t._root.opacity.picker,\n              wrapper: t._root.opacity.slider,\n              onstop: function onstop() {\n                return t._emit(\"changestop\", t);\n              },\n              onchange: function onchange(o) {\n                if (!e.opacity || !e.palette) return;\n                var n = r();\n                t._recalc && (n.a = Math.round(100 * o) / 100), this.element.style.background = \"rgba(0, 0, 0, \".concat(n.a, \")\"), s.palette.trigger();\n              }\n            }),\n            selectable: P({\n              elements: t._root.interaction.options,\n              className: \"active\",\n              onchange: function onchange(e) {\n                t._representation = e.target.getAttribute(\"data-type\").toUpperCase(), t._recalc && t._updateOutput();\n              }\n            })\n          };\n\n          this._components = s;\n        }\n      }, {\n        key: \"_bindEvents\",\n        value: function _bindEvents() {\n          var _this3 = this;\n\n          var t = this._root,\n              e = this.options,\n              o = [a(t.interaction.clear, \"click\", function () {\n            return _this3._clearColor();\n          }), a([t.interaction.cancel, t.preview.lastColor], \"click\", function () {\n            _this3._emit(\"cancel\", _this3), _this3.setHSVA.apply(_this3, _toConsumableArray((_this3._lastColor || _this3._color).toHSVA()).concat([!0]));\n          }), a(t.interaction.save, \"click\", function () {\n            !_this3.applyColor() && !e.showAlways && _this3.hide();\n          }), a(t.interaction.result, [\"keyup\", \"input\"], function (t) {\n            _this3.setColor(t.target.value, !0) && !_this3._initializingActive && _this3._emit(\"change\", _this3._color), t.stopImmediatePropagation();\n          }), a(t.interaction.result, [\"focus\", \"blur\"], function (t) {\n            _this3._recalc = \"blur\" === t.type, _this3._recalc && _this3._updateOutput();\n          }), a([t.palette.palette, t.palette.picker, t.hue.slider, t.hue.picker, t.opacity.slider, t.opacity.picker], [\"mousedown\", \"touchstart\"], function () {\n            return _this3._recalc = !0;\n          })];\n\n          if (!e.showAlways) {\n            var _n7 = e.closeWithKey;\n            o.push(a(t.button, \"click\", function () {\n              return _this3.isOpen() ? _this3.hide() : _this3.show();\n            }), a(document, \"keyup\", function (t) {\n              return _this3.isOpen() && (t.key === _n7 || t.code === _n7) && _this3.hide();\n            }), a(document, [\"touchstart\", \"mousedown\"], function (e) {\n              _this3.isOpen() && !d(e).some(function (e) {\n                return e === t.app || e === t.button;\n              }) && _this3.hide();\n            }, {\n              capture: !0\n            }));\n          }\n\n          if (e.adjustableNumbers) {\n            var _e12 = {\n              rgba: [255, 255, 255, 1],\n              hsva: [360, 100, 100, 1],\n              hsla: [360, 100, 100, 1],\n              cmyk: [100, 100, 100, 100]\n            };\n            m(t.interaction.result, function (t, o, n) {\n              var i = _e12[_this3.getColorRepresentation().toLowerCase()];\n\n              if (i) {\n                var _e13 = i[n],\n                    _r6 = t + (_e13 >= 100 ? 1e3 * o : o);\n\n                return _r6 <= 0 ? 0 : Number((_r6 < _e13 ? _r6 : _e13).toPrecision(3));\n              }\n\n              return t;\n            });\n          }\n\n          if (e.autoReposition && !e.inline) {\n            var _t8 = null;\n\n            var _n8 = this;\n\n            o.push(a(window, [\"scroll\", \"resize\"], function () {\n              _n8.isOpen() && (e.closeOnScroll && _n8.hide(), null === _t8 ? (_t8 = setTimeout(function () {\n                return _t8 = null;\n              }, 100), requestAnimationFrame(function e() {\n                _n8._rePositioningPicker(), null !== _t8 && requestAnimationFrame(e);\n              })) : (clearTimeout(_t8), _t8 = setTimeout(function () {\n                return _t8 = null;\n              }, 100)));\n            }, {\n              capture: !0\n            }));\n          }\n\n          this._eventBindings = o;\n        }\n      }, {\n        key: \"_rePositioningPicker\",\n        value: function _rePositioningPicker() {\n          var t = this.options;\n          t.inline || this._nanopop.update(t.position, !this._recalc);\n        }\n      }, {\n        key: \"_updateOutput\",\n        value: function _updateOutput() {\n          var t = this._root,\n              e = this._color,\n              o = this.options;\n\n          if (t.interaction.type()) {\n            var _n9 = \"to\".concat(t.interaction.type().getAttribute(\"data-type\"));\n\n            t.interaction.result.value = \"function\" == typeof e[_n9] ? e[_n9]().toString(o.outputPrecision) : \"\";\n          }\n\n          !this._initializingActive && this._recalc && this._emit(\"change\", e);\n        }\n      }, {\n        key: \"_clearColor\",\n        value: function _clearColor() {\n          var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : !1;\n          var e = this._root,\n              o = this.options;\n          o.useAsButton || (e.button.style.color = \"rgba(0, 0, 0, 0.15)\"), e.button.classList.add(\"clear\"), o.showAlways || this.hide(), this._lastColor = null, this._initializingActive || t || (this._emit(\"save\", null), this._emit(\"clear\", this));\n        }\n      }, {\n        key: \"_parseLocalColor\",\n        value: function _parseLocalColor(t) {\n          var _j = j(t),\n              e = _j.values,\n              o = _j.type,\n              n = _j.a,\n              i = this.options.lockOpacity,\n              r = void 0 !== n && 1 !== n;\n\n          return e && 3 === e.length && (e[3] = void 0), {\n            values: !e || i && r ? null : e,\n            type: o\n          };\n        }\n      }, {\n        key: \"_emit\",\n        value: function _emit(t) {\n          var _this4 = this;\n\n          for (var _len = arguments.length, e = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n            e[_key - 1] = arguments[_key];\n          }\n\n          this._eventListener[t].forEach(function (t) {\n            return t.apply(void 0, e.concat([_this4]));\n          });\n        }\n      }, {\n        key: \"on\",\n        value: function on(t, e) {\n          return \"function\" == typeof e && \"string\" == typeof t && t in this._eventListener && this._eventListener[t].push(e), this;\n        }\n      }, {\n        key: \"off\",\n        value: function off(t, e) {\n          var o = this._eventListener[t];\n\n          if (o) {\n            var _t9 = o.indexOf(e);\n\n            ~_t9 && o.splice(_t9, 1);\n          }\n\n          return this;\n        }\n      }, {\n        key: \"addSwatch\",\n        value: function addSwatch(t) {\n          var _this5 = this;\n\n          var _this$_parseLocalColo = this._parseLocalColor(t),\n              e = _this$_parseLocalColo.values;\n\n          if (e) {\n            var _t10 = this._swatchColors,\n                _o15 = this._root,\n                _n10 = x.apply(void 0, _toConsumableArray(e)),\n                _i6 = p('<button type=\"button\" style=\"color: '.concat(_n10.toRGBA().toString(0), '\" aria-label=\"color swatch\"/>'));\n\n            return _o15.swatches.appendChild(_i6), _t10.push({\n              el: _i6,\n              color: _n10\n            }), this._eventBindings.push(a(_i6, \"click\", function () {\n              _this5.setHSVA.apply(_this5, _toConsumableArray(_n10.toHSVA()).concat([!0])), _this5._emit(\"swatchselect\", _n10), _this5._emit(\"change\", _n10);\n            })), !0;\n          }\n\n          return !1;\n        }\n      }, {\n        key: \"removeSwatch\",\n        value: function removeSwatch(t) {\n          var e = this._swatchColors[t];\n\n          if (e) {\n            var _o16 = e.el;\n            return this._root.swatches.removeChild(_o16), this._swatchColors.splice(t, 1), !0;\n          }\n\n          return !1;\n        }\n      }, {\n        key: \"applyColor\",\n        value: function applyColor() {\n          var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : !1;\n\n          var _this$_root2 = this._root,\n              e = _this$_root2.preview,\n              o = _this$_root2.button,\n              n = this._color.toRGBA().toString(0);\n\n          return e.lastColor.style.color = n, this.options.useAsButton || (o.style.color = n), o.classList.remove(\"clear\"), this._lastColor = this._color.clone(), this._initializingActive || t || this._emit(\"save\", this._color), this;\n        }\n      }, {\n        key: \"destroy\",\n        value: function destroy() {\n          var _this6 = this;\n\n          this._eventBindings.forEach(function (t) {\n            return l.apply(void 0, _toConsumableArray(t));\n          }), Object.keys(this._components).forEach(function (t) {\n            return _this6._components[t].destroy();\n          });\n        }\n      }, {\n        key: \"destroyAndRemove\",\n        value: function destroyAndRemove() {\n          var _this7 = this;\n\n          this.destroy();\n          var _this$_root3 = this._root,\n              t = _this$_root3.root,\n              e = _this$_root3.app;\n          t.parentElement && t.parentElement.removeChild(t), e.parentElement.removeChild(e), Object.keys(this).forEach(function (t) {\n            return _this7[t] = null;\n          });\n        }\n      }, {\n        key: \"hide\",\n        value: function hide() {\n          return this._root.app.classList.remove(\"visible\"), this._emit(\"hide\", this), this;\n        }\n      }, {\n        key: \"show\",\n        value: function show() {\n          return this.options.disabled || (this._root.app.classList.add(\"visible\"), this._rePositioningPicker(), this._emit(\"show\", this)), this;\n        }\n      }, {\n        key: \"isOpen\",\n        value: function isOpen() {\n          return this._root.app.classList.contains(\"visible\");\n        }\n      }, {\n        key: \"setHSVA\",\n        value: function setHSVA() {\n          var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 360;\n          var e = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n          var o = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;\n          var n = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 1;\n          var i = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : !1;\n          var r = this._recalc;\n          if (this._recalc = !1, t < 0 || t > 360 || e < 0 || e > 100 || o < 0 || o > 100 || n < 0 || n > 1) return !1;\n          this._color = x(t, e, o, n);\n          var _this$_components = this._components,\n              s = _this$_components.hue,\n              c = _this$_components.opacity,\n              a = _this$_components.palette;\n          return s.update(t / 360), c.update(n), a.update(e / 100, 1 - o / 100), i || this.applyColor(), r && this._updateOutput(), this._recalc = r, !0;\n        }\n      }, {\n        key: \"setColor\",\n        value: function setColor(t) {\n          var e = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : !1;\n          if (null === t) return this._clearColor(e), !0;\n\n          var _this$_parseLocalColo2 = this._parseLocalColor(t),\n              o = _this$_parseLocalColo2.values,\n              n = _this$_parseLocalColo2.type;\n\n          if (o) {\n            var _t11 = n.toUpperCase(),\n                _i7 = this._root.interaction.options,\n                _r7 = _i7.find(function (e) {\n              return e.getAttribute(\"data-type\") === _t11;\n            });\n\n            if (_r7 && !_r7.hidden) {\n              var _iterator5 = _createForOfIteratorHelper(_i7),\n                  _step5;\n\n              try {\n                for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {\n                  var _t12 = _step5.value;\n\n                  _t12.classList[_t12 === _r7 ? \"add\" : \"remove\"](\"active\");\n                }\n              } catch (err) {\n                _iterator5.e(err);\n              } finally {\n                _iterator5.f();\n              }\n            }\n\n            return !!this.setHSVA.apply(this, _toConsumableArray(o).concat([e])) && this.setColorRepresentation(_t11);\n          }\n\n          return !1;\n        }\n      }, {\n        key: \"setColorRepresentation\",\n        value: function setColorRepresentation(t) {\n          return t = t.toUpperCase(), !!this._root.interaction.options.find(function (e) {\n            return e.getAttribute(\"data-type\").startsWith(t) && !e.click();\n          });\n        }\n      }, {\n        key: \"getColorRepresentation\",\n        value: function getColorRepresentation() {\n          return this._representation;\n        }\n      }, {\n        key: \"getColor\",\n        value: function getColor() {\n          return this._color;\n        }\n      }, {\n        key: \"getSelectedColor\",\n        value: function getSelectedColor() {\n          return this._lastColor;\n        }\n      }, {\n        key: \"getRoot\",\n        value: function getRoot() {\n          return this._root;\n        }\n      }, {\n        key: \"disable\",\n        value: function disable() {\n          return this.hide(), this.options.disabled = !0, this._root.button.classList.add(\"disabled\"), this;\n        }\n      }, {\n        key: \"enable\",\n        value: function enable() {\n          return this.options.disabled = !1, this._root.button.classList.remove(\"disabled\"), this;\n        }\n      }]);\n\n      return R;\n    }();\n\n    R.utils = n, R.libs = {\n      HSVaColor: x,\n      Moveable: L,\n      Nanopop: B,\n      Selectable: P\n    }, R.create = function (t) {\n      return new R(t);\n    }, R.version = v.a;\n    e.default = R;\n  }]).default;\n});","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n'use strict';\n/**\n * Use invariant() to assert state which your program assumes to be true.\n *\n * Provide sprintf-style format (only %s is supported) and arguments\n * to provide information about what broke and what you were\n * expecting.\n *\n * The invariant message will be stripped in production, but the invariant\n * will remain to ensure logic does not differ in production.\n */\n\nvar invariant = function invariant(condition, format, a, b, c, d, e, f) {\n  if (process.env.NODE_ENV !== 'production') {\n    if (format === undefined) {\n      throw new Error('invariant requires an error message argument');\n    }\n  }\n\n  if (!condition) {\n    var error;\n\n    if (format === undefined) {\n      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');\n    } else {\n      var args = [a, b, c, d, e, f];\n      var argIndex = 0;\n      error = new Error(format.replace(/%s/g, function () {\n        return args[argIndex++];\n      }));\n      error.name = 'Invariant Violation';\n    }\n\n    error.framesToPop = 1; // we don't care about invariant's own frame\n\n    throw error;\n  }\n};\n\nmodule.exports = invariant;","\"use strict\";\n\nvar __importDefault = this && this.__importDefault || function (mod) {\n  return mod && mod.__esModule ? mod : {\n    \"default\": mod\n  };\n};\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar Range_1 = __importDefault(require(\"./Range\"));\n\nexports.Range = Range_1.default;\n\nvar utils_1 = require(\"./utils\");\n\nexports.getTrackBackground = utils_1.getTrackBackground;\nexports.useThumbOverlap = utils_1.useThumbOverlap;\nexports.relativeValue = utils_1.relativeValue;\n\nvar types_1 = require(\"./types\");\n\nexports.Direction = types_1.Direction;","\"use strict\";\n\nvar __extends = this && this.__extends || function () {\n  var _extendStatics = function extendStatics(d, b) {\n    _extendStatics = Object.setPrototypeOf || {\n      __proto__: []\n    } instanceof Array && function (d, b) {\n      d.__proto__ = b;\n    } || function (d, b) {\n      for (var p in b) {\n        if (b.hasOwnProperty(p)) d[p] = b[p];\n      }\n    };\n\n    return _extendStatics(d, b);\n  };\n\n  return function (d, b) {\n    _extendStatics(d, b);\n\n    function __() {\n      this.constructor = d;\n    }\n\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n  };\n}();\n\nvar __importStar = this && this.__importStar || function (mod) {\n  if (mod && mod.__esModule) return mod;\n  var result = {};\n  if (mod != null) for (var k in mod) {\n    if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\n  }\n  result[\"default\"] = mod;\n  return result;\n};\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar React = __importStar(require(\"react\"));\n\nvar utils_1 = require(\"./utils\");\n\nvar types_1 = require(\"./types\");\n\nvar INCREASE_KEYS = ['ArrowRight', 'ArrowUp', 'k', 'PageUp'];\nvar DECREASE_KEYS = ['ArrowLeft', 'ArrowDown', 'j', 'PageDown'];\n\nvar Range = function (_super) {\n  __extends(Range, _super);\n\n  function Range(props) {\n    var _this = _super.call(this, props) || this;\n\n    _this.trackRef = React.createRef();\n    _this.thumbRefs = [];\n    _this.state = {\n      draggedThumbIndex: -1,\n      thumbZIndexes: new Array(_this.props.values.length).fill(0).map(function (t, i) {\n        return i;\n      }),\n      isChanged: false\n    };\n\n    _this.getOffsets = function () {\n      var _a = _this.props,\n          direction = _a.direction,\n          values = _a.values,\n          min = _a.min,\n          max = _a.max;\n      var trackElement = _this.trackRef.current;\n      var trackRect = trackElement.getBoundingClientRect();\n      var trackPadding = utils_1.getPaddingAndBorder(trackElement);\n      return _this.getThumbs().map(function (thumb, index) {\n        var thumbOffsets = {\n          x: 0,\n          y: 0\n        };\n        var thumbRect = thumb.getBoundingClientRect();\n        var thumbMargins = utils_1.getMargin(thumb);\n\n        switch (direction) {\n          case types_1.Direction.Right:\n            thumbOffsets.x = (thumbMargins.left + trackPadding.left) * -1;\n            thumbOffsets.y = ((thumbRect.height - trackRect.height) / 2 + trackPadding.top) * -1;\n            thumbOffsets.x += trackRect.width * utils_1.relativeValue(values[index], min, max) - thumbRect.width / 2;\n            return thumbOffsets;\n\n          case types_1.Direction.Left:\n            thumbOffsets.x = (thumbMargins.right + trackPadding.right) * -1;\n            thumbOffsets.y = ((thumbRect.height - trackRect.height) / 2 + trackPadding.top) * -1;\n            thumbOffsets.x += trackRect.width - trackRect.width * utils_1.relativeValue(values[index], min, max) - thumbRect.width / 2;\n            return thumbOffsets;\n\n          case types_1.Direction.Up:\n            thumbOffsets.x = ((thumbRect.width - trackRect.width) / 2 + thumbMargins.left + trackPadding.left) * -1;\n            thumbOffsets.y = -trackPadding.left;\n            thumbOffsets.y += trackRect.height - trackRect.height * utils_1.relativeValue(values[index], min, max) - thumbRect.height / 2;\n            return thumbOffsets;\n\n          case types_1.Direction.Down:\n            thumbOffsets.x = ((thumbRect.width - trackRect.width) / 2 + thumbMargins.left + trackPadding.left) * -1;\n            thumbOffsets.y = -trackPadding.left;\n            thumbOffsets.y += trackRect.height * utils_1.relativeValue(values[index], min, max) - thumbRect.height / 2;\n            return thumbOffsets;\n\n          default:\n            return utils_1.assertUnreachable(direction);\n        }\n      });\n    };\n\n    _this.getThumbs = function () {\n      if (_this.trackRef && _this.trackRef.current) {\n        return Array.from(_this.trackRef.current.children);\n      }\n\n      console.warn('No thumbs found in the track container. Did you forget to pass & spread the `props` param in renderTrack?');\n      return [];\n    };\n\n    _this.getTargetIndex = function (e) {\n      return _this.getThumbs().findIndex(function (child) {\n        return child === e.target || child.contains(e.target);\n      });\n    };\n\n    _this.addTouchEvents = function (e) {\n      document.addEventListener('touchmove', _this.schdOnTouchMove, {\n        passive: false\n      });\n      document.addEventListener('touchend', _this.schdOnEnd, {\n        passive: false\n      });\n      document.addEventListener('touchcancel', _this.schdOnEnd, {\n        passive: false\n      });\n    };\n\n    _this.addMouseEvents = function (e) {\n      document.addEventListener('mousemove', _this.schdOnMouseMove);\n      document.addEventListener('mouseup', _this.schdOnEnd);\n    };\n\n    _this.onMouseDownTrack = function (e) {\n      var _a; // in case there is a single thumb, we want to support\n      // moving the thumb to a place where the track is clicked\n\n\n      if (e.button !== 0 || _this.props.values.length > 1) return;\n      (_a = _this.thumbRefs[0].current) === null || _a === void 0 ? void 0 : _a.focus();\n      e.persist();\n      e.preventDefault();\n\n      _this.addMouseEvents(e.nativeEvent);\n\n      _this.setState({\n        draggedThumbIndex: 0\n      }, function () {\n        return _this.onMove(e.clientX, e.clientY);\n      });\n    };\n\n    _this.onWindowResize = function () {\n      utils_1.translateThumbs(_this.getThumbs(), _this.getOffsets(), _this.props.rtl);\n    };\n\n    _this.onTouchStartTrack = function (e) {\n      // in case there is a single thumb, we want to support\n      // moving the thumb to a place where the track is clicked\n      if (_this.props.values.length > 1) return;\n      e.persist();\n\n      _this.addTouchEvents(e.nativeEvent);\n\n      _this.setState({\n        draggedThumbIndex: 0\n      }, function () {\n        return _this.onMove(e.touches[0].clientX, e.touches[0].clientY);\n      });\n    };\n\n    _this.onMouseOrTouchStart = function (e) {\n      if (_this.props.disabled) return;\n      var isTouch = utils_1.isTouchEvent(e);\n      if (!isTouch && e.button !== 0) return;\n\n      var index = _this.getTargetIndex(e);\n\n      if (index === -1) return;\n\n      if (isTouch) {\n        _this.addTouchEvents(e);\n      } else {\n        _this.addMouseEvents(e);\n      }\n\n      _this.setState({\n        draggedThumbIndex: index,\n        thumbZIndexes: _this.state.thumbZIndexes.map(function (t, i) {\n          if (i === index) {\n            return Math.max.apply(Math, _this.state.thumbZIndexes);\n          }\n\n          return t <= _this.state.thumbZIndexes[index] ? t : t - 1;\n        })\n      });\n    };\n\n    _this.onMouseMove = function (e) {\n      e.preventDefault();\n\n      _this.onMove(e.clientX, e.clientY);\n    };\n\n    _this.onTouchMove = function (e) {\n      e.preventDefault();\n\n      _this.onMove(e.touches[0].clientX, e.touches[0].clientY);\n    };\n\n    _this.onKeyDown = function (e) {\n      var _a = _this.props,\n          values = _a.values,\n          onChange = _a.onChange,\n          step = _a.step,\n          rtl = _a.rtl;\n      var isChanged = _this.state.isChanged;\n\n      var index = _this.getTargetIndex(e.nativeEvent);\n\n      var inverter = rtl ? -1 : 1;\n      if (index === -1) return;\n\n      if (INCREASE_KEYS.includes(e.key)) {\n        e.preventDefault();\n\n        _this.setState({\n          draggedThumbIndex: index,\n          isChanged: true\n        });\n\n        onChange(utils_1.replaceAt(values, index, _this.normalizeValue(values[index] + inverter * (e.key === 'PageUp' ? step * 10 : step), index)));\n      } else if (DECREASE_KEYS.includes(e.key)) {\n        e.preventDefault();\n\n        _this.setState({\n          draggedThumbIndex: index,\n          isChanged: true\n        });\n\n        onChange(utils_1.replaceAt(values, index, _this.normalizeValue(values[index] - inverter * (e.key === 'PageDown' ? step * 10 : step), index)));\n      } else if (e.key === 'Tab') {\n        _this.setState({\n          draggedThumbIndex: -1\n        }, function () {\n          // If key pressed when thumb was moving, fire onFinalChange\n          if (isChanged) {\n            _this.fireOnFinalChange();\n          }\n        });\n      } else {\n        if (isChanged) {\n          _this.fireOnFinalChange();\n        }\n      }\n    };\n\n    _this.onKeyUp = function (e) {\n      var isChanged = _this.state.isChanged;\n\n      _this.setState({\n        draggedThumbIndex: -1\n      }, function () {\n        if (isChanged) {\n          _this.fireOnFinalChange();\n        }\n      });\n    };\n\n    _this.onMove = function (clientX, clientY) {\n      var draggedThumbIndex = _this.state.draggedThumbIndex;\n      var _a = _this.props,\n          direction = _a.direction,\n          min = _a.min,\n          max = _a.max,\n          onChange = _a.onChange,\n          values = _a.values,\n          step = _a.step,\n          rtl = _a.rtl;\n      if (draggedThumbIndex === -1) return null;\n      var trackElement = _this.trackRef.current;\n      var trackRect = trackElement.getBoundingClientRect();\n      var trackLength = utils_1.isVertical(direction) ? trackRect.height : trackRect.width;\n      var newValue = 0;\n\n      switch (direction) {\n        case types_1.Direction.Right:\n          newValue = (clientX - trackRect.left) / trackLength * (max - min) + min;\n          break;\n\n        case types_1.Direction.Left:\n          newValue = (trackLength - (clientX - trackRect.left)) / trackLength * (max - min) + min;\n          break;\n\n        case types_1.Direction.Down:\n          newValue = (clientY - trackRect.top) / trackLength * (max - min) + min;\n          break;\n\n        case types_1.Direction.Up:\n          newValue = (trackLength - (clientY - trackRect.top)) / trackLength * (max - min) + min;\n          break;\n\n        default:\n          utils_1.assertUnreachable(direction);\n      } // invert for RTL\n\n\n      if (rtl) {\n        newValue = max + min - newValue;\n      }\n\n      if (Math.abs(values[draggedThumbIndex] - newValue) >= step) {\n        onChange(utils_1.replaceAt(values, draggedThumbIndex, _this.normalizeValue(newValue, draggedThumbIndex)));\n      }\n    };\n\n    _this.normalizeValue = function (value, index) {\n      var _a = _this.props,\n          min = _a.min,\n          max = _a.max,\n          step = _a.step,\n          allowOverlap = _a.allowOverlap,\n          values = _a.values;\n      return utils_1.normalizeValue(value, index, min, max, step, allowOverlap, values);\n    };\n\n    _this.onEnd = function (e) {\n      e.preventDefault();\n      document.removeEventListener('mousemove', _this.schdOnMouseMove);\n      document.removeEventListener('touchmove', _this.schdOnTouchMove);\n      document.removeEventListener('mouseup', _this.schdOnEnd);\n      document.removeEventListener('touchup', _this.schdOnEnd);\n      document.removeEventListener('touchcancel', _this.schdOnEnd);\n      if (_this.state.draggedThumbIndex === -1) return;\n\n      _this.setState({\n        draggedThumbIndex: -1\n      }, function () {\n        _this.fireOnFinalChange();\n      });\n    };\n\n    _this.fireOnFinalChange = function () {\n      _this.setState({\n        isChanged: false\n      });\n\n      var _a = _this.props,\n          onFinalChange = _a.onFinalChange,\n          values = _a.values;\n\n      if (onFinalChange) {\n        onFinalChange(values);\n      }\n    };\n\n    _this.schdOnMouseMove = utils_1.schd(_this.onMouseMove);\n    _this.schdOnTouchMove = utils_1.schd(_this.onTouchMove);\n    _this.schdOnEnd = utils_1.schd(_this.onEnd);\n    _this.schdOnWindowResize = utils_1.schd(_this.onWindowResize);\n    _this.thumbRefs = props.values.map(function () {\n      return React.createRef();\n    });\n\n    if (!utils_1.isStepDivisible(props.min, props.max, props.step)) {\n      console.warn('The difference of `max` and `min` must be divisible by `step`');\n    }\n\n    return _this;\n  }\n\n  Range.prototype.componentDidMount = function () {\n    var _this = this;\n\n    var _a = this.props,\n        values = _a.values,\n        min = _a.min,\n        step = _a.step;\n    window.addEventListener('resize', this.schdOnWindowResize);\n    document.addEventListener('touchstart', this.onMouseOrTouchStart, {\n      passive: false\n    });\n    document.addEventListener('mousedown', this.onMouseOrTouchStart, {\n      passive: false\n    });\n    !this.props.allowOverlap && utils_1.checkInitialOverlap(this.props.values);\n    this.props.values.forEach(function (value) {\n      return utils_1.checkBoundaries(value, _this.props.min, _this.props.max);\n    });\n    utils_1.translateThumbs(this.getThumbs(), this.getOffsets(), this.props.rtl);\n    values.forEach(function (value) {\n      if (!utils_1.isStepDivisible(min, value, step)) {\n        console.warn('The `values` property is in conflict with the current `step`, `min` and `max` properties. Please provide values that are accessible using the min, max an step values');\n      }\n    });\n  };\n\n  Range.prototype.componentDidUpdate = function (prevProps) {\n    utils_1.translateThumbs(this.getThumbs(), this.getOffsets(), this.props.rtl);\n  };\n\n  Range.prototype.componentWillUnmount = function () {\n    var options = {\n      passive: false\n    };\n    window.removeEventListener('resize', this.schdOnWindowResize);\n    document.removeEventListener('mousedown', this.onMouseOrTouchStart, options);\n    document.removeEventListener('touchstart', this.onMouseOrTouchStart);\n    document.removeEventListener('touchend', this.schdOnEnd);\n  };\n\n  Range.prototype.render = function () {\n    var _this = this;\n\n    var _a = this.props,\n        renderTrack = _a.renderTrack,\n        renderThumb = _a.renderThumb,\n        values = _a.values,\n        min = _a.min,\n        max = _a.max,\n        allowOverlap = _a.allowOverlap,\n        disabled = _a.disabled;\n    var _b = this.state,\n        draggedThumbIndex = _b.draggedThumbIndex,\n        thumbZIndexes = _b.thumbZIndexes;\n    return renderTrack({\n      props: {\n        style: {\n          // creates stacking context that prevents z-index applied to thumbs\n          // interfere with other elements\n          transform: 'scale(1)',\n          cursor: draggedThumbIndex > -1 ? 'grabbing' : values.length === 1 && !disabled ? 'pointer' : 'inherit'\n        },\n        onMouseDown: disabled ? utils_1.voidFn : this.onMouseDownTrack,\n        onTouchStart: disabled ? utils_1.voidFn : this.onTouchStartTrack,\n        ref: this.trackRef\n      },\n      isDragged: this.state.draggedThumbIndex > -1,\n      disabled: disabled,\n      children: values.map(function (value, index) {\n        var isDragged = _this.state.draggedThumbIndex === index;\n        return renderThumb({\n          index: index,\n          value: value,\n          isDragged: isDragged,\n          props: {\n            style: {\n              position: 'absolute',\n              zIndex: thumbZIndexes[index],\n              cursor: disabled ? 'inherit' : isDragged ? 'grabbing' : 'grab',\n              userSelect: 'none',\n              touchAction: 'none',\n              WebkitUserSelect: 'none',\n              MozUserSelect: 'none',\n              msUserSelect: 'none'\n            },\n            key: index,\n            tabIndex: disabled ? undefined : 0,\n            'aria-valuemax': allowOverlap ? max : values[index + 1] || max,\n            'aria-valuemin': allowOverlap ? min : values[index - 1] || min,\n            'aria-valuenow': value,\n            draggable: false,\n            ref: _this.thumbRefs[index],\n            role: 'slider',\n            onKeyDown: disabled ? utils_1.voidFn : _this.onKeyDown,\n            onKeyUp: disabled ? utils_1.voidFn : _this.onKeyUp\n          }\n        });\n      })\n    });\n  };\n\n  Range.defaultProps = {\n    step: 1,\n    direction: types_1.Direction.Right,\n    rtl: false,\n    disabled: false,\n    allowOverlap: false,\n    min: 0,\n    max: 100\n  };\n  return Range;\n}(React.Component);\n\nexports.default = Range;","'use strict';\n\nfunction _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nfunction _interopDefault(ex) {\n  return ex && _typeof(ex) === 'object' && 'default' in ex ? ex['default'] : ex;\n}\n\nvar ResizeObserver = _interopDefault(require('resize-observer-polyfill'));\n\nvar react = require('react');\n\nfunction _extends() {\n  _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  return _extends.apply(this, arguments);\n}\n\nfunction index(_temp) {\n  var _ref = _temp === void 0 ? {} : _temp,\n      ref = _ref.ref,\n      onResize = _ref.onResize; // `defaultRef` Has to be non-conditionally declared here whether or not it'll\n  // be used as that's how hooks work.\n  // @see https://reactjs.org/docs/hooks-rules.html#explanation\n\n\n  var defaultRef = react.useRef(null);\n  ref = ref || defaultRef;\n\n  var _useState = react.useState({\n    width: undefined,\n    height: undefined\n  }),\n      size = _useState[0],\n      setSize = _useState[1]; // Using a ref to track the previous width / height to avoid unnecessary renders\n\n\n  var previous = react.useRef({\n    width: undefined,\n    height: undefined\n  });\n  react.useEffect(function () {\n    if (_typeof(ref) !== \"object\" || ref === null || !(ref.current instanceof Element)) {\n      return;\n    }\n\n    var element = ref.current;\n    var resizeObserver = new ResizeObserver(function (entries) {\n      if (!Array.isArray(entries)) {\n        return;\n      } // Since we only observe the one element, we don't need to loop over the\n      // array\n\n\n      if (!entries.length) {\n        return;\n      }\n\n      var entry = entries[0]; // `Math.round` is in line with how CSS resolves sub-pixel values\n\n      var newWidth = Math.round(entry.contentRect.width);\n      var newHeight = Math.round(entry.contentRect.height);\n\n      if (previous.current.width !== newWidth || previous.current.height !== newHeight) {\n        var newSize = {\n          width: newWidth,\n          height: newHeight\n        };\n\n        if (onResize) {\n          onResize(newSize);\n        } else {\n          previous.current.width = newWidth;\n          previous.current.height = newHeight;\n          setSize(newSize);\n        }\n      }\n    });\n    resizeObserver.observe(element);\n    return function () {\n      return resizeObserver.unobserve(element);\n    };\n  }, [ref, onResize]);\n  return react.useMemo(function () {\n    return _extends({\n      ref: ref\n    }, size);\n  }, [ref, size ? size.width : null, size ? size.height : null]);\n}\n\nmodule.exports = index;","/**\r\n * A collection of shims that provide minimal functionality of the ES6 collections.\r\n *\r\n * These implementations are not meant to be used outside of the ResizeObserver\r\n * modules as they cover only a limited range of use cases.\r\n */\n\n/* eslint-disable require-jsdoc, valid-jsdoc */\nvar MapShim = function () {\n  if (typeof Map !== 'undefined') {\n    return Map;\n  }\n  /**\r\n   * Returns index in provided array that matches the specified key.\r\n   *\r\n   * @param {Array<Array>} arr\r\n   * @param {*} key\r\n   * @returns {number}\r\n   */\n\n\n  function getIndex(arr, key) {\n    var result = -1;\n    arr.some(function (entry, index) {\n      if (entry[0] === key) {\n        result = index;\n        return true;\n      }\n\n      return false;\n    });\n    return result;\n  }\n\n  return function () {\n    function class_1() {\n      this.__entries__ = [];\n    }\n\n    Object.defineProperty(class_1.prototype, \"size\", {\n      /**\r\n       * @returns {boolean}\r\n       */\n      get: function get() {\n        return this.__entries__.length;\n      },\n      enumerable: true,\n      configurable: true\n    });\n    /**\r\n     * @param {*} key\r\n     * @returns {*}\r\n     */\n\n    class_1.prototype.get = function (key) {\n      var index = getIndex(this.__entries__, key);\n      var entry = this.__entries__[index];\n      return entry && entry[1];\n    };\n    /**\r\n     * @param {*} key\r\n     * @param {*} value\r\n     * @returns {void}\r\n     */\n\n\n    class_1.prototype.set = function (key, value) {\n      var index = getIndex(this.__entries__, key);\n\n      if (~index) {\n        this.__entries__[index][1] = value;\n      } else {\n        this.__entries__.push([key, value]);\n      }\n    };\n    /**\r\n     * @param {*} key\r\n     * @returns {void}\r\n     */\n\n\n    class_1.prototype.delete = function (key) {\n      var entries = this.__entries__;\n      var index = getIndex(entries, key);\n\n      if (~index) {\n        entries.splice(index, 1);\n      }\n    };\n    /**\r\n     * @param {*} key\r\n     * @returns {void}\r\n     */\n\n\n    class_1.prototype.has = function (key) {\n      return !!~getIndex(this.__entries__, key);\n    };\n    /**\r\n     * @returns {void}\r\n     */\n\n\n    class_1.prototype.clear = function () {\n      this.__entries__.splice(0);\n    };\n    /**\r\n     * @param {Function} callback\r\n     * @param {*} [ctx=null]\r\n     * @returns {void}\r\n     */\n\n\n    class_1.prototype.forEach = function (callback, ctx) {\n      if (ctx === void 0) {\n        ctx = null;\n      }\n\n      for (var _i = 0, _a = this.__entries__; _i < _a.length; _i++) {\n        var entry = _a[_i];\n        callback.call(ctx, entry[1], entry[0]);\n      }\n    };\n\n    return class_1;\n  }();\n}();\n/**\r\n * Detects whether window and document objects are available in current environment.\r\n */\n\n\nvar isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined' && window.document === document; // Returns global object of a current environment.\n\nvar global$1 = function () {\n  if (typeof global !== 'undefined' && global.Math === Math) {\n    return global;\n  }\n\n  if (typeof self !== 'undefined' && self.Math === Math) {\n    return self;\n  }\n\n  if (typeof window !== 'undefined' && window.Math === Math) {\n    return window;\n  } // eslint-disable-next-line no-new-func\n\n\n  return Function('return this')();\n}();\n/**\r\n * A shim for the requestAnimationFrame which falls back to the setTimeout if\r\n * first one is not supported.\r\n *\r\n * @returns {number} Requests' identifier.\r\n */\n\n\nvar requestAnimationFrame$1 = function () {\n  if (typeof requestAnimationFrame === 'function') {\n    // It's required to use a bounded function because IE sometimes throws\n    // an \"Invalid calling object\" error if rAF is invoked without the global\n    // object on the left hand side.\n    return requestAnimationFrame.bind(global$1);\n  }\n\n  return function (callback) {\n    return setTimeout(function () {\n      return callback(Date.now());\n    }, 1000 / 60);\n  };\n}(); // Defines minimum timeout before adding a trailing call.\n\n\nvar trailingTimeout = 2;\n/**\r\n * Creates a wrapper function which ensures that provided callback will be\r\n * invoked only once during the specified delay period.\r\n *\r\n * @param {Function} callback - Function to be invoked after the delay period.\r\n * @param {number} delay - Delay after which to invoke callback.\r\n * @returns {Function}\r\n */\n\nfunction throttle(callback, delay) {\n  var leadingCall = false,\n      trailingCall = false,\n      lastCallTime = 0;\n  /**\r\n   * Invokes the original callback function and schedules new invocation if\r\n   * the \"proxy\" was called during current request.\r\n   *\r\n   * @returns {void}\r\n   */\n\n  function resolvePending() {\n    if (leadingCall) {\n      leadingCall = false;\n      callback();\n    }\n\n    if (trailingCall) {\n      proxy();\n    }\n  }\n  /**\r\n   * Callback invoked after the specified delay. It will further postpone\r\n   * invocation of the original function delegating it to the\r\n   * requestAnimationFrame.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  function timeoutCallback() {\n    requestAnimationFrame$1(resolvePending);\n  }\n  /**\r\n   * Schedules invocation of the original function.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  function proxy() {\n    var timeStamp = Date.now();\n\n    if (leadingCall) {\n      // Reject immediately following calls.\n      if (timeStamp - lastCallTime < trailingTimeout) {\n        return;\n      } // Schedule new call to be in invoked when the pending one is resolved.\n      // This is important for \"transitions\" which never actually start\n      // immediately so there is a chance that we might miss one if change\n      // happens amids the pending invocation.\n\n\n      trailingCall = true;\n    } else {\n      leadingCall = true;\n      trailingCall = false;\n      setTimeout(timeoutCallback, delay);\n    }\n\n    lastCallTime = timeStamp;\n  }\n\n  return proxy;\n} // Minimum delay before invoking the update of observers.\n\n\nvar REFRESH_DELAY = 20; // A list of substrings of CSS properties used to find transition events that\n// might affect dimensions of observed elements.\n\nvar transitionKeys = ['top', 'right', 'bottom', 'left', 'width', 'height', 'size', 'weight']; // Check if MutationObserver is available.\n\nvar mutationObserverSupported = typeof MutationObserver !== 'undefined';\n/**\r\n * Singleton controller class which handles updates of ResizeObserver instances.\r\n */\n\nvar ResizeObserverController = function () {\n  /**\r\n   * Creates a new instance of ResizeObserverController.\r\n   *\r\n   * @private\r\n   */\n  function ResizeObserverController() {\n    /**\r\n     * Indicates whether DOM listeners have been added.\r\n     *\r\n     * @private {boolean}\r\n     */\n    this.connected_ = false;\n    /**\r\n     * Tells that controller has subscribed for Mutation Events.\r\n     *\r\n     * @private {boolean}\r\n     */\n\n    this.mutationEventsAdded_ = false;\n    /**\r\n     * Keeps reference to the instance of MutationObserver.\r\n     *\r\n     * @private {MutationObserver}\r\n     */\n\n    this.mutationsObserver_ = null;\n    /**\r\n     * A list of connected observers.\r\n     *\r\n     * @private {Array<ResizeObserverSPI>}\r\n     */\n\n    this.observers_ = [];\n    this.onTransitionEnd_ = this.onTransitionEnd_.bind(this);\n    this.refresh = throttle(this.refresh.bind(this), REFRESH_DELAY);\n  }\n  /**\r\n   * Adds observer to observers list.\r\n   *\r\n   * @param {ResizeObserverSPI} observer - Observer to be added.\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.addObserver = function (observer) {\n    if (!~this.observers_.indexOf(observer)) {\n      this.observers_.push(observer);\n    } // Add listeners if they haven't been added yet.\n\n\n    if (!this.connected_) {\n      this.connect_();\n    }\n  };\n  /**\r\n   * Removes observer from observers list.\r\n   *\r\n   * @param {ResizeObserverSPI} observer - Observer to be removed.\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.removeObserver = function (observer) {\n    var observers = this.observers_;\n    var index = observers.indexOf(observer); // Remove observer if it's present in registry.\n\n    if (~index) {\n      observers.splice(index, 1);\n    } // Remove listeners if controller has no connected observers.\n\n\n    if (!observers.length && this.connected_) {\n      this.disconnect_();\n    }\n  };\n  /**\r\n   * Invokes the update of observers. It will continue running updates insofar\r\n   * it detects changes.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.refresh = function () {\n    var changesDetected = this.updateObservers_(); // Continue running updates if changes have been detected as there might\n    // be future ones caused by CSS transitions.\n\n    if (changesDetected) {\n      this.refresh();\n    }\n  };\n  /**\r\n   * Updates every observer from observers list and notifies them of queued\r\n   * entries.\r\n   *\r\n   * @private\r\n   * @returns {boolean} Returns \"true\" if any observer has detected changes in\r\n   *      dimensions of it's elements.\r\n   */\n\n\n  ResizeObserverController.prototype.updateObservers_ = function () {\n    // Collect observers that have active observations.\n    var activeObservers = this.observers_.filter(function (observer) {\n      return observer.gatherActive(), observer.hasActive();\n    }); // Deliver notifications in a separate cycle in order to avoid any\n    // collisions between observers, e.g. when multiple instances of\n    // ResizeObserver are tracking the same element and the callback of one\n    // of them changes content dimensions of the observed target. Sometimes\n    // this may result in notifications being blocked for the rest of observers.\n\n    activeObservers.forEach(function (observer) {\n      return observer.broadcastActive();\n    });\n    return activeObservers.length > 0;\n  };\n  /**\r\n   * Initializes DOM listeners.\r\n   *\r\n   * @private\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.connect_ = function () {\n    // Do nothing if running in a non-browser environment or if listeners\n    // have been already added.\n    if (!isBrowser || this.connected_) {\n      return;\n    } // Subscription to the \"Transitionend\" event is used as a workaround for\n    // delayed transitions. This way it's possible to capture at least the\n    // final state of an element.\n\n\n    document.addEventListener('transitionend', this.onTransitionEnd_);\n    window.addEventListener('resize', this.refresh);\n\n    if (mutationObserverSupported) {\n      this.mutationsObserver_ = new MutationObserver(this.refresh);\n      this.mutationsObserver_.observe(document, {\n        attributes: true,\n        childList: true,\n        characterData: true,\n        subtree: true\n      });\n    } else {\n      document.addEventListener('DOMSubtreeModified', this.refresh);\n      this.mutationEventsAdded_ = true;\n    }\n\n    this.connected_ = true;\n  };\n  /**\r\n   * Removes DOM listeners.\r\n   *\r\n   * @private\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.disconnect_ = function () {\n    // Do nothing if running in a non-browser environment or if listeners\n    // have been already removed.\n    if (!isBrowser || !this.connected_) {\n      return;\n    }\n\n    document.removeEventListener('transitionend', this.onTransitionEnd_);\n    window.removeEventListener('resize', this.refresh);\n\n    if (this.mutationsObserver_) {\n      this.mutationsObserver_.disconnect();\n    }\n\n    if (this.mutationEventsAdded_) {\n      document.removeEventListener('DOMSubtreeModified', this.refresh);\n    }\n\n    this.mutationsObserver_ = null;\n    this.mutationEventsAdded_ = false;\n    this.connected_ = false;\n  };\n  /**\r\n   * \"Transitionend\" event handler.\r\n   *\r\n   * @private\r\n   * @param {TransitionEvent} event\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverController.prototype.onTransitionEnd_ = function (_a) {\n    var _b = _a.propertyName,\n        propertyName = _b === void 0 ? '' : _b; // Detect whether transition may affect dimensions of an element.\n\n    var isReflowProperty = transitionKeys.some(function (key) {\n      return !!~propertyName.indexOf(key);\n    });\n\n    if (isReflowProperty) {\n      this.refresh();\n    }\n  };\n  /**\r\n   * Returns instance of the ResizeObserverController.\r\n   *\r\n   * @returns {ResizeObserverController}\r\n   */\n\n\n  ResizeObserverController.getInstance = function () {\n    if (!this.instance_) {\n      this.instance_ = new ResizeObserverController();\n    }\n\n    return this.instance_;\n  };\n  /**\r\n   * Holds reference to the controller's instance.\r\n   *\r\n   * @private {ResizeObserverController}\r\n   */\n\n\n  ResizeObserverController.instance_ = null;\n  return ResizeObserverController;\n}();\n/**\r\n * Defines non-writable/enumerable properties of the provided target object.\r\n *\r\n * @param {Object} target - Object for which to define properties.\r\n * @param {Object} props - Properties to be defined.\r\n * @returns {Object} Target object.\r\n */\n\n\nvar defineConfigurable = function defineConfigurable(target, props) {\n  for (var _i = 0, _a = Object.keys(props); _i < _a.length; _i++) {\n    var key = _a[_i];\n    Object.defineProperty(target, key, {\n      value: props[key],\n      enumerable: false,\n      writable: false,\n      configurable: true\n    });\n  }\n\n  return target;\n};\n/**\r\n * Returns the global object associated with provided element.\r\n *\r\n * @param {Object} target\r\n * @returns {Object}\r\n */\n\n\nvar getWindowOf = function getWindowOf(target) {\n  // Assume that the element is an instance of Node, which means that it\n  // has the \"ownerDocument\" property from which we can retrieve a\n  // corresponding global object.\n  var ownerGlobal = target && target.ownerDocument && target.ownerDocument.defaultView; // Return the local global object if it's not possible extract one from\n  // provided element.\n\n  return ownerGlobal || global$1;\n}; // Placeholder of an empty content rectangle.\n\n\nvar emptyRect = createRectInit(0, 0, 0, 0);\n/**\r\n * Converts provided string to a number.\r\n *\r\n * @param {number|string} value\r\n * @returns {number}\r\n */\n\nfunction toFloat(value) {\n  return parseFloat(value) || 0;\n}\n/**\r\n * Extracts borders size from provided styles.\r\n *\r\n * @param {CSSStyleDeclaration} styles\r\n * @param {...string} positions - Borders positions (top, right, ...)\r\n * @returns {number}\r\n */\n\n\nfunction getBordersSize(styles) {\n  var positions = [];\n\n  for (var _i = 1; _i < arguments.length; _i++) {\n    positions[_i - 1] = arguments[_i];\n  }\n\n  return positions.reduce(function (size, position) {\n    var value = styles['border-' + position + '-width'];\n    return size + toFloat(value);\n  }, 0);\n}\n/**\r\n * Extracts paddings sizes from provided styles.\r\n *\r\n * @param {CSSStyleDeclaration} styles\r\n * @returns {Object} Paddings box.\r\n */\n\n\nfunction getPaddings(styles) {\n  var positions = ['top', 'right', 'bottom', 'left'];\n  var paddings = {};\n\n  for (var _i = 0, positions_1 = positions; _i < positions_1.length; _i++) {\n    var position = positions_1[_i];\n    var value = styles['padding-' + position];\n    paddings[position] = toFloat(value);\n  }\n\n  return paddings;\n}\n/**\r\n * Calculates content rectangle of provided SVG element.\r\n *\r\n * @param {SVGGraphicsElement} target - Element content rectangle of which needs\r\n *      to be calculated.\r\n * @returns {DOMRectInit}\r\n */\n\n\nfunction getSVGContentRect(target) {\n  var bbox = target.getBBox();\n  return createRectInit(0, 0, bbox.width, bbox.height);\n}\n/**\r\n * Calculates content rectangle of provided HTMLElement.\r\n *\r\n * @param {HTMLElement} target - Element for which to calculate the content rectangle.\r\n * @returns {DOMRectInit}\r\n */\n\n\nfunction getHTMLElementContentRect(target) {\n  // Client width & height properties can't be\n  // used exclusively as they provide rounded values.\n  var clientWidth = target.clientWidth,\n      clientHeight = target.clientHeight; // By this condition we can catch all non-replaced inline, hidden and\n  // detached elements. Though elements with width & height properties less\n  // than 0.5 will be discarded as well.\n  //\n  // Without it we would need to implement separate methods for each of\n  // those cases and it's not possible to perform a precise and performance\n  // effective test for hidden elements. E.g. even jQuery's ':visible' filter\n  // gives wrong results for elements with width & height less than 0.5.\n\n  if (!clientWidth && !clientHeight) {\n    return emptyRect;\n  }\n\n  var styles = getWindowOf(target).getComputedStyle(target);\n  var paddings = getPaddings(styles);\n  var horizPad = paddings.left + paddings.right;\n  var vertPad = paddings.top + paddings.bottom; // Computed styles of width & height are being used because they are the\n  // only dimensions available to JS that contain non-rounded values. It could\n  // be possible to utilize the getBoundingClientRect if only it's data wasn't\n  // affected by CSS transformations let alone paddings, borders and scroll bars.\n\n  var width = toFloat(styles.width),\n      height = toFloat(styles.height); // Width & height include paddings and borders when the 'border-box' box\n  // model is applied (except for IE).\n\n  if (styles.boxSizing === 'border-box') {\n    // Following conditions are required to handle Internet Explorer which\n    // doesn't include paddings and borders to computed CSS dimensions.\n    //\n    // We can say that if CSS dimensions + paddings are equal to the \"client\"\n    // properties then it's either IE, and thus we don't need to subtract\n    // anything, or an element merely doesn't have paddings/borders styles.\n    if (Math.round(width + horizPad) !== clientWidth) {\n      width -= getBordersSize(styles, 'left', 'right') + horizPad;\n    }\n\n    if (Math.round(height + vertPad) !== clientHeight) {\n      height -= getBordersSize(styles, 'top', 'bottom') + vertPad;\n    }\n  } // Following steps can't be applied to the document's root element as its\n  // client[Width/Height] properties represent viewport area of the window.\n  // Besides, it's as well not necessary as the <html> itself neither has\n  // rendered scroll bars nor it can be clipped.\n\n\n  if (!isDocumentElement(target)) {\n    // In some browsers (only in Firefox, actually) CSS width & height\n    // include scroll bars size which can be removed at this step as scroll\n    // bars are the only difference between rounded dimensions + paddings\n    // and \"client\" properties, though that is not always true in Chrome.\n    var vertScrollbar = Math.round(width + horizPad) - clientWidth;\n    var horizScrollbar = Math.round(height + vertPad) - clientHeight; // Chrome has a rather weird rounding of \"client\" properties.\n    // E.g. for an element with content width of 314.2px it sometimes gives\n    // the client width of 315px and for the width of 314.7px it may give\n    // 314px. And it doesn't happen all the time. So just ignore this delta\n    // as a non-relevant.\n\n    if (Math.abs(vertScrollbar) !== 1) {\n      width -= vertScrollbar;\n    }\n\n    if (Math.abs(horizScrollbar) !== 1) {\n      height -= horizScrollbar;\n    }\n  }\n\n  return createRectInit(paddings.left, paddings.top, width, height);\n}\n/**\r\n * Checks whether provided element is an instance of the SVGGraphicsElement.\r\n *\r\n * @param {Element} target - Element to be checked.\r\n * @returns {boolean}\r\n */\n\n\nvar isSVGGraphicsElement = function () {\n  // Some browsers, namely IE and Edge, don't have the SVGGraphicsElement\n  // interface.\n  if (typeof SVGGraphicsElement !== 'undefined') {\n    return function (target) {\n      return target instanceof getWindowOf(target).SVGGraphicsElement;\n    };\n  } // If it's so, then check that element is at least an instance of the\n  // SVGElement and that it has the \"getBBox\" method.\n  // eslint-disable-next-line no-extra-parens\n\n\n  return function (target) {\n    return target instanceof getWindowOf(target).SVGElement && typeof target.getBBox === 'function';\n  };\n}();\n/**\r\n * Checks whether provided element is a document element (<html>).\r\n *\r\n * @param {Element} target - Element to be checked.\r\n * @returns {boolean}\r\n */\n\n\nfunction isDocumentElement(target) {\n  return target === getWindowOf(target).document.documentElement;\n}\n/**\r\n * Calculates an appropriate content rectangle for provided html or svg element.\r\n *\r\n * @param {Element} target - Element content rectangle of which needs to be calculated.\r\n * @returns {DOMRectInit}\r\n */\n\n\nfunction getContentRect(target) {\n  if (!isBrowser) {\n    return emptyRect;\n  }\n\n  if (isSVGGraphicsElement(target)) {\n    return getSVGContentRect(target);\n  }\n\n  return getHTMLElementContentRect(target);\n}\n/**\r\n * Creates rectangle with an interface of the DOMRectReadOnly.\r\n * Spec: https://drafts.fxtf.org/geometry/#domrectreadonly\r\n *\r\n * @param {DOMRectInit} rectInit - Object with rectangle's x/y coordinates and dimensions.\r\n * @returns {DOMRectReadOnly}\r\n */\n\n\nfunction createReadOnlyRect(_a) {\n  var x = _a.x,\n      y = _a.y,\n      width = _a.width,\n      height = _a.height; // If DOMRectReadOnly is available use it as a prototype for the rectangle.\n\n  var Constr = typeof DOMRectReadOnly !== 'undefined' ? DOMRectReadOnly : Object;\n  var rect = Object.create(Constr.prototype); // Rectangle's properties are not writable and non-enumerable.\n\n  defineConfigurable(rect, {\n    x: x,\n    y: y,\n    width: width,\n    height: height,\n    top: y,\n    right: x + width,\n    bottom: height + y,\n    left: x\n  });\n  return rect;\n}\n/**\r\n * Creates DOMRectInit object based on the provided dimensions and the x/y coordinates.\r\n * Spec: https://drafts.fxtf.org/geometry/#dictdef-domrectinit\r\n *\r\n * @param {number} x - X coordinate.\r\n * @param {number} y - Y coordinate.\r\n * @param {number} width - Rectangle's width.\r\n * @param {number} height - Rectangle's height.\r\n * @returns {DOMRectInit}\r\n */\n\n\nfunction createRectInit(x, y, width, height) {\n  return {\n    x: x,\n    y: y,\n    width: width,\n    height: height\n  };\n}\n/**\r\n * Class that is responsible for computations of the content rectangle of\r\n * provided DOM element and for keeping track of it's changes.\r\n */\n\n\nvar ResizeObservation = function () {\n  /**\r\n   * Creates an instance of ResizeObservation.\r\n   *\r\n   * @param {Element} target - Element to be observed.\r\n   */\n  function ResizeObservation(target) {\n    /**\r\n     * Broadcasted width of content rectangle.\r\n     *\r\n     * @type {number}\r\n     */\n    this.broadcastWidth = 0;\n    /**\r\n     * Broadcasted height of content rectangle.\r\n     *\r\n     * @type {number}\r\n     */\n\n    this.broadcastHeight = 0;\n    /**\r\n     * Reference to the last observed content rectangle.\r\n     *\r\n     * @private {DOMRectInit}\r\n     */\n\n    this.contentRect_ = createRectInit(0, 0, 0, 0);\n    this.target = target;\n  }\n  /**\r\n   * Updates content rectangle and tells whether it's width or height properties\r\n   * have changed since the last broadcast.\r\n   *\r\n   * @returns {boolean}\r\n   */\n\n\n  ResizeObservation.prototype.isActive = function () {\n    var rect = getContentRect(this.target);\n    this.contentRect_ = rect;\n    return rect.width !== this.broadcastWidth || rect.height !== this.broadcastHeight;\n  };\n  /**\r\n   * Updates 'broadcastWidth' and 'broadcastHeight' properties with a data\r\n   * from the corresponding properties of the last observed content rectangle.\r\n   *\r\n   * @returns {DOMRectInit} Last observed content rectangle.\r\n   */\n\n\n  ResizeObservation.prototype.broadcastRect = function () {\n    var rect = this.contentRect_;\n    this.broadcastWidth = rect.width;\n    this.broadcastHeight = rect.height;\n    return rect;\n  };\n\n  return ResizeObservation;\n}();\n\nvar ResizeObserverEntry = function () {\n  /**\r\n   * Creates an instance of ResizeObserverEntry.\r\n   *\r\n   * @param {Element} target - Element that is being observed.\r\n   * @param {DOMRectInit} rectInit - Data of the element's content rectangle.\r\n   */\n  function ResizeObserverEntry(target, rectInit) {\n    var contentRect = createReadOnlyRect(rectInit); // According to the specification following properties are not writable\n    // and are also not enumerable in the native implementation.\n    //\n    // Property accessors are not being used as they'd require to define a\n    // private WeakMap storage which may cause memory leaks in browsers that\n    // don't support this type of collections.\n\n    defineConfigurable(this, {\n      target: target,\n      contentRect: contentRect\n    });\n  }\n\n  return ResizeObserverEntry;\n}();\n\nvar ResizeObserverSPI = function () {\n  /**\r\n   * Creates a new instance of ResizeObserver.\r\n   *\r\n   * @param {ResizeObserverCallback} callback - Callback function that is invoked\r\n   *      when one of the observed elements changes it's content dimensions.\r\n   * @param {ResizeObserverController} controller - Controller instance which\r\n   *      is responsible for the updates of observer.\r\n   * @param {ResizeObserver} callbackCtx - Reference to the public\r\n   *      ResizeObserver instance which will be passed to callback function.\r\n   */\n  function ResizeObserverSPI(callback, controller, callbackCtx) {\n    /**\r\n     * Collection of resize observations that have detected changes in dimensions\r\n     * of elements.\r\n     *\r\n     * @private {Array<ResizeObservation>}\r\n     */\n    this.activeObservations_ = [];\n    /**\r\n     * Registry of the ResizeObservation instances.\r\n     *\r\n     * @private {Map<Element, ResizeObservation>}\r\n     */\n\n    this.observations_ = new MapShim();\n\n    if (typeof callback !== 'function') {\n      throw new TypeError('The callback provided as parameter 1 is not a function.');\n    }\n\n    this.callback_ = callback;\n    this.controller_ = controller;\n    this.callbackCtx_ = callbackCtx;\n  }\n  /**\r\n   * Starts observing provided element.\r\n   *\r\n   * @param {Element} target - Element to be observed.\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.observe = function (target) {\n    if (!arguments.length) {\n      throw new TypeError('1 argument required, but only 0 present.');\n    } // Do nothing if current environment doesn't have the Element interface.\n\n\n    if (typeof Element === 'undefined' || !(Element instanceof Object)) {\n      return;\n    }\n\n    if (!(target instanceof getWindowOf(target).Element)) {\n      throw new TypeError('parameter 1 is not of type \"Element\".');\n    }\n\n    var observations = this.observations_; // Do nothing if element is already being observed.\n\n    if (observations.has(target)) {\n      return;\n    }\n\n    observations.set(target, new ResizeObservation(target));\n    this.controller_.addObserver(this); // Force the update of observations.\n\n    this.controller_.refresh();\n  };\n  /**\r\n   * Stops observing provided element.\r\n   *\r\n   * @param {Element} target - Element to stop observing.\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.unobserve = function (target) {\n    if (!arguments.length) {\n      throw new TypeError('1 argument required, but only 0 present.');\n    } // Do nothing if current environment doesn't have the Element interface.\n\n\n    if (typeof Element === 'undefined' || !(Element instanceof Object)) {\n      return;\n    }\n\n    if (!(target instanceof getWindowOf(target).Element)) {\n      throw new TypeError('parameter 1 is not of type \"Element\".');\n    }\n\n    var observations = this.observations_; // Do nothing if element is not being observed.\n\n    if (!observations.has(target)) {\n      return;\n    }\n\n    observations.delete(target);\n\n    if (!observations.size) {\n      this.controller_.removeObserver(this);\n    }\n  };\n  /**\r\n   * Stops observing all elements.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.disconnect = function () {\n    this.clearActive();\n    this.observations_.clear();\n    this.controller_.removeObserver(this);\n  };\n  /**\r\n   * Collects observation instances the associated element of which has changed\r\n   * it's content rectangle.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.gatherActive = function () {\n    var _this = this;\n\n    this.clearActive();\n    this.observations_.forEach(function (observation) {\n      if (observation.isActive()) {\n        _this.activeObservations_.push(observation);\n      }\n    });\n  };\n  /**\r\n   * Invokes initial callback function with a list of ResizeObserverEntry\r\n   * instances collected from active resize observations.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.broadcastActive = function () {\n    // Do nothing if observer doesn't have active observations.\n    if (!this.hasActive()) {\n      return;\n    }\n\n    var ctx = this.callbackCtx_; // Create ResizeObserverEntry instance for every active observation.\n\n    var entries = this.activeObservations_.map(function (observation) {\n      return new ResizeObserverEntry(observation.target, observation.broadcastRect());\n    });\n    this.callback_.call(ctx, entries, ctx);\n    this.clearActive();\n  };\n  /**\r\n   * Clears the collection of active observations.\r\n   *\r\n   * @returns {void}\r\n   */\n\n\n  ResizeObserverSPI.prototype.clearActive = function () {\n    this.activeObservations_.splice(0);\n  };\n  /**\r\n   * Tells whether observer has active observations.\r\n   *\r\n   * @returns {boolean}\r\n   */\n\n\n  ResizeObserverSPI.prototype.hasActive = function () {\n    return this.activeObservations_.length > 0;\n  };\n\n  return ResizeObserverSPI;\n}(); // Registry of internal observers. If WeakMap is not available use current shim\n// for the Map collection as it has all required methods and because WeakMap\n// can't be fully polyfilled anyway.\n\n\nvar observers = typeof WeakMap !== 'undefined' ? new WeakMap() : new MapShim();\n/**\r\n * ResizeObserver API. Encapsulates the ResizeObserver SPI implementation\r\n * exposing only those methods and properties that are defined in the spec.\r\n */\n\nvar ResizeObserver = function () {\n  /**\r\n   * Creates a new instance of ResizeObserver.\r\n   *\r\n   * @param {ResizeObserverCallback} callback - Callback that is invoked when\r\n   *      dimensions of the observed elements change.\r\n   */\n  function ResizeObserver(callback) {\n    if (!(this instanceof ResizeObserver)) {\n      throw new TypeError('Cannot call a class as a function.');\n    }\n\n    if (!arguments.length) {\n      throw new TypeError('1 argument required, but only 0 present.');\n    }\n\n    var controller = ResizeObserverController.getInstance();\n    var observer = new ResizeObserverSPI(callback, controller, this);\n    observers.set(this, observer);\n  }\n\n  return ResizeObserver;\n}(); // Expose public methods of ResizeObserver.\n\n\n['observe', 'unobserve', 'disconnect'].forEach(function (method) {\n  ResizeObserver.prototype[method] = function () {\n    var _a;\n\n    return (_a = observers.get(this))[method].apply(_a, arguments);\n  };\n});\n\nvar index = function () {\n  // Export existing implementation if available.\n  if (typeof global$1.ResizeObserver !== 'undefined') {\n    return global$1.ResizeObserver;\n  }\n\n  return ResizeObserver;\n}();\n\nexport default index;","export default function _arrayLikeToArray(arr, len) {\n  if (len == null || len > arr.length) len = arr.length;\n\n  for (var i = 0, arr2 = new Array(len); i < len; i++) {\n    arr2[i] = arr[i];\n  }\n\n  return arr2;\n}","import arrayLikeToArray from \"./arrayLikeToArray\";\nexport default function _unsupportedIterableToArray(o, minLen) {\n  if (!o) return;\n  if (typeof o === \"string\") return arrayLikeToArray(o, minLen);\n  var n = Object.prototype.toString.call(o).slice(8, -1);\n  if (n === \"Object\" && o.constructor) n = o.constructor.name;\n  if (n === \"Map\" || n === \"Set\") return Array.from(o);\n  if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return arrayLikeToArray(o, minLen);\n}","import arrayWithHoles from \"./arrayWithHoles\";\nimport iterableToArrayLimit from \"./iterableToArrayLimit\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableRest from \"./nonIterableRest\";\nexport default function _slicedToArray(arr, i) {\n  return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || unsupportedIterableToArray(arr, i) || nonIterableRest();\n}","export default function _arrayWithHoles(arr) {\n  if (Array.isArray(arr)) return arr;\n}","export default function _iterableToArrayLimit(arr, i) {\n  if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;\n  var _arr = [];\n  var _n = true;\n  var _d = false;\n  var _e = undefined;\n\n  try {\n    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n      _arr.push(_s.value);\n\n      if (i && _arr.length === i) break;\n    }\n  } catch (err) {\n    _d = true;\n    _e = err;\n  } finally {\n    try {\n      if (!_n && _i[\"return\"] != null) _i[\"return\"]();\n    } finally {\n      if (_d) throw _e;\n    }\n  }\n\n  return _arr;\n}","export default function _nonIterableRest() {\n  throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","import defineProperty from \"./defineProperty\";\nexport default function _objectSpread(target) {\n  for (var i = 1; i < arguments.length; i++) {\n    var source = arguments[i] != null ? Object(arguments[i]) : {};\n    var ownKeys = Object.keys(source);\n\n    if (typeof Object.getOwnPropertySymbols === 'function') {\n      ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {\n        return Object.getOwnPropertyDescriptor(source, sym).enumerable;\n      }));\n    }\n\n    ownKeys.forEach(function (key) {\n      defineProperty(target, key, source[key]);\n    });\n  }\n\n  return target;\n}","export default function _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}","function _defineProperties(target, props) {\n  for (var i = 0; i < props.length; i++) {\n    var descriptor = props[i];\n    descriptor.enumerable = descriptor.enumerable || false;\n    descriptor.configurable = true;\n    if (\"value\" in descriptor) descriptor.writable = true;\n    Object.defineProperty(target, descriptor.key, descriptor);\n  }\n}\n\nexport default function _createClass(Constructor, protoProps, staticProps) {\n  if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n  if (staticProps) _defineProperties(Constructor, staticProps);\n  return Constructor;\n}","export default function _typeof(obj) {\n  \"@babel/helpers - typeof\";\n\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    _typeof = function _typeof(obj) {\n      return typeof obj;\n    };\n  } else {\n    _typeof = function _typeof(obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}","import _typeof from \"../../helpers/esm/typeof\";\nimport assertThisInitialized from \"./assertThisInitialized\";\nexport default function _possibleConstructorReturn(self, call) {\n  if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n    return call;\n  }\n\n  return assertThisInitialized(self);\n}","export default function _getPrototypeOf(o) {\n  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n    return o.__proto__ || Object.getPrototypeOf(o);\n  };\n  return _getPrototypeOf(o);\n}","export default function _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}","import setPrototypeOf from \"./setPrototypeOf\";\nexport default function _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}","import arrayWithoutHoles from \"./arrayWithoutHoles\";\nimport iterableToArray from \"./iterableToArray\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableSpread from \"./nonIterableSpread\";\nexport default function _toConsumableArray(arr) {\n  return arrayWithoutHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableSpread();\n}","import arrayLikeToArray from \"./arrayLikeToArray\";\nexport default function _arrayWithoutHoles(arr) {\n  if (Array.isArray(arr)) return arrayLikeToArray(arr);\n}","export default function _iterableToArray(iter) {\n  if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);\n}","export default function _nonIterableSpread() {\n  throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","import _extends from '@babel/runtime/helpers/esm/extends';\nimport _slicedToArray from '@babel/runtime/helpers/esm/slicedToArray';\nimport _objectSpread from '@babel/runtime/helpers/esm/objectSpread';\nimport _classCallCheck from '@babel/runtime/helpers/esm/classCallCheck';\nimport _createClass from '@babel/runtime/helpers/esm/createClass';\nimport _possibleConstructorReturn from '@babel/runtime/helpers/esm/possibleConstructorReturn';\nimport _getPrototypeOf from '@babel/runtime/helpers/esm/getPrototypeOf';\nimport _inherits from '@babel/runtime/helpers/esm/inherits';\nimport _assertThisInitialized from '@babel/runtime/helpers/esm/assertThisInitialized';\nimport _defineProperty from '@babel/runtime/helpers/esm/defineProperty';\nimport { createElement, Component } from 'react';\nimport PropTypes from 'prop-types';\nimport { findDOMNode } from 'react-dom';\nimport invariant from 'invariant';\nimport _toConsumableArray from '@babel/runtime/helpers/esm/toConsumableArray';\n\nvar Manager = function () {\n  function Manager() {\n    _classCallCheck(this, Manager);\n\n    _defineProperty(this, \"refs\", {});\n  }\n\n  _createClass(Manager, [{\n    key: \"add\",\n    value: function add(collection, ref) {\n      if (!this.refs[collection]) {\n        this.refs[collection] = [];\n      }\n\n      this.refs[collection].push(ref);\n    }\n  }, {\n    key: \"remove\",\n    value: function remove(collection, ref) {\n      var index = this.getIndex(collection, ref);\n\n      if (index !== -1) {\n        this.refs[collection].splice(index, 1);\n      }\n    }\n  }, {\n    key: \"isActive\",\n    value: function isActive() {\n      return this.active;\n    }\n  }, {\n    key: \"getActive\",\n    value: function getActive() {\n      var _this = this;\n\n      return this.refs[this.active.collection].find(function (_ref) {\n        var node = _ref.node;\n        return node.sortableInfo.index == _this.active.index;\n      });\n    }\n  }, {\n    key: \"getIndex\",\n    value: function getIndex(collection, ref) {\n      return this.refs[collection].indexOf(ref);\n    }\n  }, {\n    key: \"getOrderedRefs\",\n    value: function getOrderedRefs() {\n      var collection = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.active.collection;\n      return this.refs[collection].sort(sortByIndex);\n    }\n  }]);\n\n  return Manager;\n}();\n\nfunction sortByIndex(_ref2, _ref3) {\n  var index1 = _ref2.node.sortableInfo.index;\n  var index2 = _ref3.node.sortableInfo.index;\n  return index1 - index2;\n}\n\nfunction arrayMove(array, from, to) {\n  if (process.env.NODE_ENV !== 'production') {\n    if (typeof console !== 'undefined') {\n      console.warn(\"Deprecation warning: arrayMove will no longer be exported by 'react-sortable-hoc' in the next major release. Please install the `array-move` package locally instead. https://www.npmjs.com/package/array-move\");\n    }\n  }\n\n  array = array.slice();\n  array.splice(to < 0 ? array.length + to : to, 0, array.splice(from, 1)[0]);\n  return array;\n}\n\nfunction omit(obj, keysToOmit) {\n  return Object.keys(obj).reduce(function (acc, key) {\n    if (keysToOmit.indexOf(key) === -1) {\n      acc[key] = obj[key];\n    }\n\n    return acc;\n  }, {});\n}\n\nvar events = {\n  end: ['touchend', 'touchcancel', 'mouseup'],\n  move: ['touchmove', 'mousemove'],\n  start: ['touchstart', 'mousedown']\n};\n\nvar vendorPrefix = function () {\n  if (typeof window === 'undefined' || typeof document === 'undefined') {\n    return '';\n  }\n\n  var styles = window.getComputedStyle(document.documentElement, '') || ['-moz-hidden-iframe'];\n  var pre = (Array.prototype.slice.call(styles).join('').match(/-(moz|webkit|ms)-/) || styles.OLink === '' && ['', 'o'])[1];\n\n  switch (pre) {\n    case 'ms':\n      return 'ms';\n\n    default:\n      return pre && pre.length ? pre[0].toUpperCase() + pre.substr(1) : '';\n  }\n}();\n\nfunction setInlineStyles(node, styles) {\n  Object.keys(styles).forEach(function (key) {\n    node.style[key] = styles[key];\n  });\n}\n\nfunction setTranslate3d(node, translate) {\n  node.style[\"\".concat(vendorPrefix, \"Transform\")] = translate == null ? '' : \"translate3d(\".concat(translate.x, \"px,\").concat(translate.y, \"px,0)\");\n}\n\nfunction setTransitionDuration(node, duration) {\n  node.style[\"\".concat(vendorPrefix, \"TransitionDuration\")] = duration == null ? '' : \"\".concat(duration, \"ms\");\n}\n\nfunction closest(el, fn) {\n  while (el) {\n    if (fn(el)) {\n      return el;\n    }\n\n    el = el.parentNode;\n  }\n\n  return null;\n}\n\nfunction limit(min, max, value) {\n  return Math.max(min, Math.min(value, max));\n}\n\nfunction getPixelValue(stringValue) {\n  if (stringValue.substr(-2) === 'px') {\n    return parseFloat(stringValue);\n  }\n\n  return 0;\n}\n\nfunction getElementMargin(element) {\n  var style = window.getComputedStyle(element);\n  return {\n    bottom: getPixelValue(style.marginBottom),\n    left: getPixelValue(style.marginLeft),\n    right: getPixelValue(style.marginRight),\n    top: getPixelValue(style.marginTop)\n  };\n}\n\nfunction provideDisplayName(prefix, Component$$1) {\n  var componentName = Component$$1.displayName || Component$$1.name;\n  return componentName ? \"\".concat(prefix, \"(\").concat(componentName, \")\") : prefix;\n}\n\nfunction getScrollAdjustedBoundingClientRect(node, scrollDelta) {\n  var boundingClientRect = node.getBoundingClientRect();\n  return {\n    top: boundingClientRect.top + scrollDelta.top,\n    left: boundingClientRect.left + scrollDelta.left\n  };\n}\n\nfunction getPosition(event) {\n  if (event.touches && event.touches.length) {\n    return {\n      x: event.touches[0].pageX,\n      y: event.touches[0].pageY\n    };\n  } else if (event.changedTouches && event.changedTouches.length) {\n    return {\n      x: event.changedTouches[0].pageX,\n      y: event.changedTouches[0].pageY\n    };\n  } else {\n    return {\n      x: event.pageX,\n      y: event.pageY\n    };\n  }\n}\n\nfunction isTouchEvent(event) {\n  return event.touches && event.touches.length || event.changedTouches && event.changedTouches.length;\n}\n\nfunction getEdgeOffset(node, parent) {\n  var offset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {\n    left: 0,\n    top: 0\n  };\n\n  if (!node) {\n    return undefined;\n  }\n\n  var nodeOffset = {\n    left: offset.left + node.offsetLeft,\n    top: offset.top + node.offsetTop\n  };\n\n  if (node.parentNode === parent) {\n    return nodeOffset;\n  }\n\n  return getEdgeOffset(node.parentNode, parent, nodeOffset);\n}\n\nfunction getTargetIndex(newIndex, prevIndex, oldIndex) {\n  if (newIndex < oldIndex && newIndex > prevIndex) {\n    return newIndex - 1;\n  } else if (newIndex > oldIndex && newIndex < prevIndex) {\n    return newIndex + 1;\n  } else {\n    return newIndex;\n  }\n}\n\nfunction getLockPixelOffset(_ref) {\n  var lockOffset = _ref.lockOffset,\n      width = _ref.width,\n      height = _ref.height;\n  var offsetX = lockOffset;\n  var offsetY = lockOffset;\n  var unit = 'px';\n\n  if (typeof lockOffset === 'string') {\n    var match = /^[+-]?\\d*(?:\\.\\d*)?(px|%)$/.exec(lockOffset);\n    invariant(match !== null, 'lockOffset value should be a number or a string of a ' + 'number followed by \"px\" or \"%\". Given %s', lockOffset);\n    offsetX = parseFloat(lockOffset);\n    offsetY = parseFloat(lockOffset);\n    unit = match[1];\n  }\n\n  invariant(isFinite(offsetX) && isFinite(offsetY), 'lockOffset value should be a finite. Given %s', lockOffset);\n\n  if (unit === '%') {\n    offsetX = offsetX * width / 100;\n    offsetY = offsetY * height / 100;\n  }\n\n  return {\n    x: offsetX,\n    y: offsetY\n  };\n}\n\nfunction getLockPixelOffsets(_ref2) {\n  var height = _ref2.height,\n      width = _ref2.width,\n      lockOffset = _ref2.lockOffset;\n  var offsets = Array.isArray(lockOffset) ? lockOffset : [lockOffset, lockOffset];\n  invariant(offsets.length === 2, 'lockOffset prop of SortableContainer should be a single ' + 'value or an array of exactly two values. Given %s', lockOffset);\n\n  var _offsets = _slicedToArray(offsets, 2),\n      minLockOffset = _offsets[0],\n      maxLockOffset = _offsets[1];\n\n  return [getLockPixelOffset({\n    height: height,\n    lockOffset: minLockOffset,\n    width: width\n  }), getLockPixelOffset({\n    height: height,\n    lockOffset: maxLockOffset,\n    width: width\n  })];\n}\n\nfunction isScrollable(el) {\n  var computedStyle = window.getComputedStyle(el);\n  var overflowRegex = /(auto|scroll)/;\n  var properties = ['overflow', 'overflowX', 'overflowY'];\n  return properties.find(function (property) {\n    return overflowRegex.test(computedStyle[property]);\n  });\n}\n\nfunction getScrollingParent(el) {\n  if (!(el instanceof HTMLElement)) {\n    return null;\n  } else if (isScrollable(el)) {\n    return el;\n  } else {\n    return getScrollingParent(el.parentNode);\n  }\n}\n\nfunction getContainerGridGap(element) {\n  var style = window.getComputedStyle(element);\n\n  if (style.display === 'grid') {\n    return {\n      x: getPixelValue(style.gridColumnGap),\n      y: getPixelValue(style.gridRowGap)\n    };\n  }\n\n  return {\n    x: 0,\n    y: 0\n  };\n}\n\nvar KEYCODE = {\n  TAB: 9,\n  ESC: 27,\n  SPACE: 32,\n  LEFT: 37,\n  UP: 38,\n  RIGHT: 39,\n  DOWN: 40\n};\nvar NodeType = {\n  Anchor: 'A',\n  Button: 'BUTTON',\n  Canvas: 'CANVAS',\n  Input: 'INPUT',\n  Option: 'OPTION',\n  Textarea: 'TEXTAREA',\n  Select: 'SELECT'\n};\n\nfunction cloneNode(node) {\n  var selector = 'input, textarea, select, canvas, [contenteditable]';\n  var fields = node.querySelectorAll(selector);\n  var clonedNode = node.cloneNode(true);\n\n  var clonedFields = _toConsumableArray(clonedNode.querySelectorAll(selector));\n\n  clonedFields.forEach(function (field, i) {\n    if (field.type !== 'file') {\n      field.value = fields[i].value;\n    }\n\n    if (field.type === 'radio' && field.name) {\n      field.name = \"__sortableClone__\".concat(field.name);\n    }\n\n    if (field.tagName === NodeType.Canvas && fields[i].width > 0 && fields[i].height > 0) {\n      var destCtx = field.getContext('2d');\n      destCtx.drawImage(fields[i], 0, 0);\n    }\n  });\n  return clonedNode;\n}\n\nfunction sortableHandle(WrappedComponent) {\n  var _class, _temp;\n\n  var config = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {\n    withRef: false\n  };\n  return _temp = _class = function (_React$Component) {\n    _inherits(WithSortableHandle, _React$Component);\n\n    function WithSortableHandle() {\n      _classCallCheck(this, WithSortableHandle);\n\n      return _possibleConstructorReturn(this, _getPrototypeOf(WithSortableHandle).apply(this, arguments));\n    }\n\n    _createClass(WithSortableHandle, [{\n      key: \"componentDidMount\",\n      value: function componentDidMount() {\n        var node = findDOMNode(this);\n        node.sortableHandle = true;\n      }\n    }, {\n      key: \"getWrappedInstance\",\n      value: function getWrappedInstance() {\n        invariant(config.withRef, 'To access the wrapped instance, you need to pass in {withRef: true} as the second argument of the SortableHandle() call');\n        return this.refs.wrappedInstance;\n      }\n    }, {\n      key: \"render\",\n      value: function render() {\n        var ref = config.withRef ? 'wrappedInstance' : null;\n        return /*#__PURE__*/createElement(WrappedComponent, _extends({\n          ref: ref\n        }, this.props));\n      }\n    }]);\n\n    return WithSortableHandle;\n  }(Component), _defineProperty(_class, \"displayName\", provideDisplayName('sortableHandle', WrappedComponent)), _temp;\n}\n\nfunction isSortableHandle(node) {\n  return node.sortableHandle != null;\n}\n\nvar AutoScroller = function () {\n  function AutoScroller(container, onScrollCallback) {\n    _classCallCheck(this, AutoScroller);\n\n    this.container = container;\n    this.onScrollCallback = onScrollCallback;\n  }\n\n  _createClass(AutoScroller, [{\n    key: \"clear\",\n    value: function clear() {\n      if (this.interval == null) {\n        return;\n      }\n\n      clearInterval(this.interval);\n      this.interval = null;\n    }\n  }, {\n    key: \"update\",\n    value: function update(_ref) {\n      var _this = this;\n\n      var translate = _ref.translate,\n          minTranslate = _ref.minTranslate,\n          maxTranslate = _ref.maxTranslate,\n          width = _ref.width,\n          height = _ref.height;\n      var direction = {\n        x: 0,\n        y: 0\n      };\n      var speed = {\n        x: 1,\n        y: 1\n      };\n      var acceleration = {\n        x: 10,\n        y: 10\n      };\n      var _this$container = this.container,\n          scrollTop = _this$container.scrollTop,\n          scrollLeft = _this$container.scrollLeft,\n          scrollHeight = _this$container.scrollHeight,\n          scrollWidth = _this$container.scrollWidth,\n          clientHeight = _this$container.clientHeight,\n          clientWidth = _this$container.clientWidth;\n      var isTop = scrollTop === 0;\n      var isBottom = scrollHeight - scrollTop - clientHeight === 0;\n      var isLeft = scrollLeft === 0;\n      var isRight = scrollWidth - scrollLeft - clientWidth === 0;\n\n      if (translate.y >= maxTranslate.y - height / 2 && !isBottom) {\n        direction.y = 1;\n        speed.y = acceleration.y * Math.abs((maxTranslate.y - height / 2 - translate.y) / height);\n      } else if (translate.x >= maxTranslate.x - width / 2 && !isRight) {\n        direction.x = 1;\n        speed.x = acceleration.x * Math.abs((maxTranslate.x - width / 2 - translate.x) / width);\n      } else if (translate.y <= minTranslate.y + height / 2 && !isTop) {\n        direction.y = -1;\n        speed.y = acceleration.y * Math.abs((translate.y - height / 2 - minTranslate.y) / height);\n      } else if (translate.x <= minTranslate.x + width / 2 && !isLeft) {\n        direction.x = -1;\n        speed.x = acceleration.x * Math.abs((translate.x - width / 2 - minTranslate.x) / width);\n      }\n\n      if (this.interval) {\n        this.clear();\n        this.isAutoScrolling = false;\n      }\n\n      if (direction.x !== 0 || direction.y !== 0) {\n        this.interval = setInterval(function () {\n          _this.isAutoScrolling = true;\n          var offset = {\n            left: speed.x * direction.x,\n            top: speed.y * direction.y\n          };\n          _this.container.scrollTop += offset.top;\n          _this.container.scrollLeft += offset.left;\n\n          _this.onScrollCallback(offset);\n        }, 5);\n      }\n    }\n  }]);\n\n  return AutoScroller;\n}();\n\nfunction defaultGetHelperDimensions(_ref) {\n  var node = _ref.node;\n  return {\n    height: node.offsetHeight,\n    width: node.offsetWidth\n  };\n}\n\nfunction defaultShouldCancelStart(event) {\n  var interactiveElements = [NodeType.Input, NodeType.Textarea, NodeType.Select, NodeType.Option, NodeType.Button];\n\n  if (interactiveElements.indexOf(event.target.tagName) !== -1) {\n    return true;\n  }\n\n  if (closest(event.target, function (el) {\n    return el.contentEditable === 'true';\n  })) {\n    return true;\n  }\n\n  return false;\n}\n\nvar propTypes = {\n  axis: PropTypes.oneOf(['x', 'y', 'xy']),\n  contentWindow: PropTypes.any,\n  disableAutoscroll: PropTypes.bool,\n  distance: PropTypes.number,\n  getContainer: PropTypes.func,\n  getHelperDimensions: PropTypes.func,\n  helperClass: PropTypes.string,\n  helperContainer: PropTypes.oneOfType([PropTypes.func, typeof HTMLElement === 'undefined' ? PropTypes.any : PropTypes.instanceOf(HTMLElement)]),\n  hideSortableGhost: PropTypes.bool,\n  keyboardSortingTransitionDuration: PropTypes.number,\n  lockAxis: PropTypes.string,\n  lockOffset: PropTypes.oneOfType([PropTypes.number, PropTypes.string, PropTypes.arrayOf(PropTypes.oneOfType([PropTypes.number, PropTypes.string]))]),\n  lockToContainerEdges: PropTypes.bool,\n  onSortEnd: PropTypes.func,\n  onSortMove: PropTypes.func,\n  onSortOver: PropTypes.func,\n  onSortStart: PropTypes.func,\n  pressDelay: PropTypes.number,\n  pressThreshold: PropTypes.number,\n  keyCodes: PropTypes.shape({\n    lift: PropTypes.arrayOf(PropTypes.number),\n    drop: PropTypes.arrayOf(PropTypes.number),\n    cancel: PropTypes.arrayOf(PropTypes.number),\n    up: PropTypes.arrayOf(PropTypes.number),\n    down: PropTypes.arrayOf(PropTypes.number)\n  }),\n  shouldCancelStart: PropTypes.func,\n  transitionDuration: PropTypes.number,\n  updateBeforeSortStart: PropTypes.func,\n  useDragHandle: PropTypes.bool,\n  useWindowAsScrollContainer: PropTypes.bool\n};\nvar defaultKeyCodes = {\n  lift: [KEYCODE.SPACE],\n  drop: [KEYCODE.SPACE],\n  cancel: [KEYCODE.ESC],\n  up: [KEYCODE.UP, KEYCODE.LEFT],\n  down: [KEYCODE.DOWN, KEYCODE.RIGHT]\n};\nvar defaultProps = {\n  axis: 'y',\n  disableAutoscroll: false,\n  distance: 0,\n  getHelperDimensions: defaultGetHelperDimensions,\n  hideSortableGhost: true,\n  lockOffset: '50%',\n  lockToContainerEdges: false,\n  pressDelay: 0,\n  pressThreshold: 5,\n  keyCodes: defaultKeyCodes,\n  shouldCancelStart: defaultShouldCancelStart,\n  transitionDuration: 300,\n  useWindowAsScrollContainer: false\n};\nvar omittedProps = Object.keys(propTypes);\n\nfunction validateProps(props) {\n  invariant(!(props.distance && props.pressDelay), 'Attempted to set both `pressDelay` and `distance` on SortableContainer, you may only use one or the other, not both at the same time.');\n}\n\nfunction _finallyRethrows(body, finalizer) {\n  try {\n    var result = body();\n  } catch (e) {\n    return finalizer(true, e);\n  }\n\n  if (result && result.then) {\n    return result.then(finalizer.bind(null, false), finalizer.bind(null, true));\n  }\n\n  return finalizer(false, value);\n}\n\nfunction sortableContainer(WrappedComponent) {\n  var _class, _temp;\n\n  var config = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {\n    withRef: false\n  };\n  return _temp = _class = function (_React$Component) {\n    _inherits(WithSortableContainer, _React$Component);\n\n    function WithSortableContainer(props) {\n      var _this;\n\n      _classCallCheck(this, WithSortableContainer);\n\n      _this = _possibleConstructorReturn(this, _getPrototypeOf(WithSortableContainer).call(this, props));\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"state\", {});\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleStart\", function (event) {\n        var _this$props = _this.props,\n            distance = _this$props.distance,\n            shouldCancelStart = _this$props.shouldCancelStart;\n\n        if (event.button === 2 || shouldCancelStart(event)) {\n          return;\n        }\n\n        _this.touched = true;\n        _this.position = getPosition(event);\n        var node = closest(event.target, function (el) {\n          return el.sortableInfo != null;\n        });\n\n        if (node && node.sortableInfo && _this.nodeIsChild(node) && !_this.state.sorting) {\n          var useDragHandle = _this.props.useDragHandle;\n          var _node$sortableInfo = node.sortableInfo,\n              index = _node$sortableInfo.index,\n              collection = _node$sortableInfo.collection,\n              disabled = _node$sortableInfo.disabled;\n\n          if (disabled) {\n            return;\n          }\n\n          if (useDragHandle && !closest(event.target, isSortableHandle)) {\n            return;\n          }\n\n          _this.manager.active = {\n            collection: collection,\n            index: index\n          };\n\n          if (!isTouchEvent(event) && event.target.tagName === NodeType.Anchor) {\n            event.preventDefault();\n          }\n\n          if (!distance) {\n            if (_this.props.pressDelay === 0) {\n              _this.handlePress(event);\n            } else {\n              _this.pressTimer = setTimeout(function () {\n                return _this.handlePress(event);\n              }, _this.props.pressDelay);\n            }\n          }\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"nodeIsChild\", function (node) {\n        return node.sortableInfo.manager === _this.manager;\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleMove\", function (event) {\n        var _this$props2 = _this.props,\n            distance = _this$props2.distance,\n            pressThreshold = _this$props2.pressThreshold;\n\n        if (!_this.state.sorting && _this.touched && !_this._awaitingUpdateBeforeSortStart) {\n          var position = getPosition(event);\n          var delta = {\n            x: _this.position.x - position.x,\n            y: _this.position.y - position.y\n          };\n          var combinedDelta = Math.abs(delta.x) + Math.abs(delta.y);\n          _this.delta = delta;\n\n          if (!distance && (!pressThreshold || combinedDelta >= pressThreshold)) {\n            clearTimeout(_this.cancelTimer);\n            _this.cancelTimer = setTimeout(_this.cancel, 0);\n          } else if (distance && combinedDelta >= distance && _this.manager.isActive()) {\n            _this.handlePress(event);\n          }\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleEnd\", function () {\n        _this.touched = false;\n\n        _this.cancel();\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"cancel\", function () {\n        var distance = _this.props.distance;\n        var sorting = _this.state.sorting;\n\n        if (!sorting) {\n          if (!distance) {\n            clearTimeout(_this.pressTimer);\n          }\n\n          _this.manager.active = null;\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handlePress\", function (event) {\n        try {\n          var active = _this.manager.getActive();\n\n          var _temp6 = function () {\n            if (active) {\n              var _temp7 = function _temp7() {\n                var index = _node.sortableInfo.index;\n                var margin = getElementMargin(_node);\n                var gridGap = getContainerGridGap(_this.container);\n\n                var containerBoundingRect = _this.scrollContainer.getBoundingClientRect();\n\n                var dimensions = _getHelperDimensions({\n                  index: index,\n                  node: _node,\n                  collection: _collection\n                });\n\n                _this.node = _node;\n                _this.margin = margin;\n                _this.gridGap = gridGap;\n                _this.width = dimensions.width;\n                _this.height = dimensions.height;\n                _this.marginOffset = {\n                  x: _this.margin.left + _this.margin.right + _this.gridGap.x,\n                  y: Math.max(_this.margin.top, _this.margin.bottom, _this.gridGap.y)\n                };\n                _this.boundingClientRect = _node.getBoundingClientRect();\n                _this.containerBoundingRect = containerBoundingRect;\n                _this.index = index;\n                _this.newIndex = index;\n                _this.axis = {\n                  x: _axis.indexOf('x') >= 0,\n                  y: _axis.indexOf('y') >= 0\n                };\n                _this.offsetEdge = getEdgeOffset(_node, _this.container);\n\n                if (_isKeySorting) {\n                  _this.initialOffset = getPosition(_objectSpread({}, event, {\n                    pageX: _this.boundingClientRect.left,\n                    pageY: _this.boundingClientRect.top\n                  }));\n                } else {\n                  _this.initialOffset = getPosition(event);\n                }\n\n                _this.initialScroll = {\n                  left: _this.scrollContainer.scrollLeft,\n                  top: _this.scrollContainer.scrollTop\n                };\n                _this.initialWindowScroll = {\n                  left: window.pageXOffset,\n                  top: window.pageYOffset\n                };\n                _this.helper = _this.helperContainer.appendChild(cloneNode(_node));\n                setInlineStyles(_this.helper, {\n                  boxSizing: 'border-box',\n                  height: \"\".concat(_this.height, \"px\"),\n                  left: \"\".concat(_this.boundingClientRect.left - margin.left, \"px\"),\n                  pointerEvents: 'none',\n                  position: 'fixed',\n                  top: \"\".concat(_this.boundingClientRect.top - margin.top, \"px\"),\n                  width: \"\".concat(_this.width, \"px\")\n                });\n\n                if (_isKeySorting) {\n                  _this.helper.focus();\n                }\n\n                if (_hideSortableGhost) {\n                  _this.sortableGhost = _node;\n                  setInlineStyles(_node, {\n                    opacity: 0,\n                    visibility: 'hidden'\n                  });\n                }\n\n                _this.minTranslate = {};\n                _this.maxTranslate = {};\n\n                if (_isKeySorting) {\n                  var _ref = _useWindowAsScrollContainer ? {\n                    top: 0,\n                    left: 0,\n                    width: _this.contentWindow.innerWidth,\n                    height: _this.contentWindow.innerHeight\n                  } : _this.containerBoundingRect,\n                      containerTop = _ref.top,\n                      containerLeft = _ref.left,\n                      containerWidth = _ref.width,\n                      containerHeight = _ref.height;\n\n                  var containerBottom = containerTop + containerHeight;\n                  var containerRight = containerLeft + containerWidth;\n\n                  if (_this.axis.x) {\n                    _this.minTranslate.x = containerLeft - _this.boundingClientRect.left;\n                    _this.maxTranslate.x = containerRight - (_this.boundingClientRect.left + _this.width);\n                  }\n\n                  if (_this.axis.y) {\n                    _this.minTranslate.y = containerTop - _this.boundingClientRect.top;\n                    _this.maxTranslate.y = containerBottom - (_this.boundingClientRect.top + _this.height);\n                  }\n                } else {\n                  if (_this.axis.x) {\n                    _this.minTranslate.x = (_useWindowAsScrollContainer ? 0 : containerBoundingRect.left) - _this.boundingClientRect.left - _this.width / 2;\n                    _this.maxTranslate.x = (_useWindowAsScrollContainer ? _this.contentWindow.innerWidth : containerBoundingRect.left + containerBoundingRect.width) - _this.boundingClientRect.left - _this.width / 2;\n                  }\n\n                  if (_this.axis.y) {\n                    _this.minTranslate.y = (_useWindowAsScrollContainer ? 0 : containerBoundingRect.top) - _this.boundingClientRect.top - _this.height / 2;\n                    _this.maxTranslate.y = (_useWindowAsScrollContainer ? _this.contentWindow.innerHeight : containerBoundingRect.top + containerBoundingRect.height) - _this.boundingClientRect.top - _this.height / 2;\n                  }\n                }\n\n                if (_helperClass) {\n                  _helperClass.split(' ').forEach(function (className) {\n                    return _this.helper.classList.add(className);\n                  });\n                }\n\n                _this.listenerNode = event.touches ? _node : _this.contentWindow;\n\n                if (_isKeySorting) {\n                  _this.listenerNode.addEventListener('wheel', _this.handleKeyEnd, true);\n\n                  _this.listenerNode.addEventListener('mousedown', _this.handleKeyEnd, true);\n\n                  _this.listenerNode.addEventListener('keydown', _this.handleKeyDown);\n                } else {\n                  events.move.forEach(function (eventName) {\n                    return _this.listenerNode.addEventListener(eventName, _this.handleSortMove, false);\n                  });\n                  events.end.forEach(function (eventName) {\n                    return _this.listenerNode.addEventListener(eventName, _this.handleSortEnd, false);\n                  });\n                }\n\n                _this.setState({\n                  sorting: true,\n                  sortingIndex: index\n                });\n\n                if (_onSortStart) {\n                  _onSortStart({\n                    node: _node,\n                    index: index,\n                    collection: _collection,\n                    isKeySorting: _isKeySorting,\n                    nodes: _this.manager.getOrderedRefs(),\n                    helper: _this.helper\n                  }, event);\n                }\n\n                if (_isKeySorting) {\n                  _this.keyMove(0);\n                }\n              };\n\n              var _this$props3 = _this.props,\n                  _axis = _this$props3.axis,\n                  _getHelperDimensions = _this$props3.getHelperDimensions,\n                  _helperClass = _this$props3.helperClass,\n                  _hideSortableGhost = _this$props3.hideSortableGhost,\n                  updateBeforeSortStart = _this$props3.updateBeforeSortStart,\n                  _onSortStart = _this$props3.onSortStart,\n                  _useWindowAsScrollContainer = _this$props3.useWindowAsScrollContainer;\n              var _node = active.node,\n                  _collection = active.collection;\n              var _isKeySorting = _this.manager.isKeySorting;\n\n              var _temp8 = function () {\n                if (typeof updateBeforeSortStart === 'function') {\n                  _this._awaitingUpdateBeforeSortStart = true;\n\n                  var _temp9 = _finallyRethrows(function () {\n                    var index = _node.sortableInfo.index;\n                    return Promise.resolve(updateBeforeSortStart({\n                      collection: _collection,\n                      index: index,\n                      node: _node,\n                      isKeySorting: _isKeySorting\n                    }, event)).then(function () {});\n                  }, function (_wasThrown, _result) {\n                    _this._awaitingUpdateBeforeSortStart = false;\n                    if (_wasThrown) throw _result;\n                    return _result;\n                  });\n\n                  if (_temp9 && _temp9.then) return _temp9.then(function () {});\n                }\n              }();\n\n              return _temp8 && _temp8.then ? _temp8.then(_temp7) : _temp7(_temp8);\n            }\n          }();\n\n          return Promise.resolve(_temp6 && _temp6.then ? _temp6.then(function () {}) : void 0);\n        } catch (e) {\n          return Promise.reject(e);\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleSortMove\", function (event) {\n        var onSortMove = _this.props.onSortMove;\n\n        if (typeof event.preventDefault === 'function') {\n          event.preventDefault();\n        }\n\n        _this.updateHelperPosition(event);\n\n        _this.animateNodes();\n\n        _this.autoscroll();\n\n        if (onSortMove) {\n          onSortMove(event);\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleSortEnd\", function (event) {\n        var _this$props4 = _this.props,\n            hideSortableGhost = _this$props4.hideSortableGhost,\n            onSortEnd = _this$props4.onSortEnd;\n        var _this$manager = _this.manager,\n            collection = _this$manager.active.collection,\n            isKeySorting = _this$manager.isKeySorting;\n\n        var nodes = _this.manager.getOrderedRefs();\n\n        if (_this.listenerNode) {\n          if (isKeySorting) {\n            _this.listenerNode.removeEventListener('wheel', _this.handleKeyEnd, true);\n\n            _this.listenerNode.removeEventListener('mousedown', _this.handleKeyEnd, true);\n\n            _this.listenerNode.removeEventListener('keydown', _this.handleKeyDown);\n          } else {\n            events.move.forEach(function (eventName) {\n              return _this.listenerNode.removeEventListener(eventName, _this.handleSortMove);\n            });\n            events.end.forEach(function (eventName) {\n              return _this.listenerNode.removeEventListener(eventName, _this.handleSortEnd);\n            });\n          }\n        }\n\n        _this.helper.parentNode.removeChild(_this.helper);\n\n        if (hideSortableGhost && _this.sortableGhost) {\n          setInlineStyles(_this.sortableGhost, {\n            opacity: '',\n            visibility: ''\n          });\n        }\n\n        for (var i = 0, len = nodes.length; i < len; i++) {\n          var _node2 = nodes[i];\n          var el = _node2.node;\n          _node2.edgeOffset = null;\n          _node2.boundingClientRect = null;\n          setTranslate3d(el, null);\n          setTransitionDuration(el, null);\n          _node2.translate = null;\n        }\n\n        _this.autoScroller.clear();\n\n        _this.manager.active = null;\n        _this.manager.isKeySorting = false;\n\n        _this.setState({\n          sorting: false,\n          sortingIndex: null\n        });\n\n        if (typeof onSortEnd === 'function') {\n          onSortEnd({\n            collection: collection,\n            newIndex: _this.newIndex,\n            oldIndex: _this.index,\n            isKeySorting: isKeySorting,\n            nodes: nodes\n          }, event);\n        }\n\n        _this.touched = false;\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"autoscroll\", function () {\n        var disableAutoscroll = _this.props.disableAutoscroll;\n        var isKeySorting = _this.manager.isKeySorting;\n\n        if (disableAutoscroll) {\n          _this.autoScroller.clear();\n\n          return;\n        }\n\n        if (isKeySorting) {\n          var translate = _objectSpread({}, _this.translate);\n\n          var scrollX = 0;\n          var scrollY = 0;\n\n          if (_this.axis.x) {\n            translate.x = Math.min(_this.maxTranslate.x, Math.max(_this.minTranslate.x, _this.translate.x));\n            scrollX = _this.translate.x - translate.x;\n          }\n\n          if (_this.axis.y) {\n            translate.y = Math.min(_this.maxTranslate.y, Math.max(_this.minTranslate.y, _this.translate.y));\n            scrollY = _this.translate.y - translate.y;\n          }\n\n          _this.translate = translate;\n          setTranslate3d(_this.helper, _this.translate);\n          _this.scrollContainer.scrollLeft += scrollX;\n          _this.scrollContainer.scrollTop += scrollY;\n          return;\n        }\n\n        _this.autoScroller.update({\n          height: _this.height,\n          maxTranslate: _this.maxTranslate,\n          minTranslate: _this.minTranslate,\n          translate: _this.translate,\n          width: _this.width\n        });\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"onAutoScroll\", function (offset) {\n        _this.translate.x += offset.left;\n        _this.translate.y += offset.top;\n\n        _this.animateNodes();\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleKeyDown\", function (event) {\n        var keyCode = event.keyCode;\n        var _this$props5 = _this.props,\n            shouldCancelStart = _this$props5.shouldCancelStart,\n            _this$props5$keyCodes = _this$props5.keyCodes,\n            customKeyCodes = _this$props5$keyCodes === void 0 ? {} : _this$props5$keyCodes;\n\n        var keyCodes = _objectSpread({}, defaultKeyCodes, customKeyCodes);\n\n        if (_this.manager.active && !_this.manager.isKeySorting || !_this.manager.active && (!keyCodes.lift.includes(keyCode) || shouldCancelStart(event) || !_this.isValidSortingTarget(event))) {\n          return;\n        }\n\n        event.stopPropagation();\n        event.preventDefault();\n\n        if (keyCodes.lift.includes(keyCode) && !_this.manager.active) {\n          _this.keyLift(event);\n        } else if (keyCodes.drop.includes(keyCode) && _this.manager.active) {\n          _this.keyDrop(event);\n        } else if (keyCodes.cancel.includes(keyCode)) {\n          _this.newIndex = _this.manager.active.index;\n\n          _this.keyDrop(event);\n        } else if (keyCodes.up.includes(keyCode)) {\n          _this.keyMove(-1);\n        } else if (keyCodes.down.includes(keyCode)) {\n          _this.keyMove(1);\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"keyLift\", function (event) {\n        var target = event.target;\n        var node = closest(target, function (el) {\n          return el.sortableInfo != null;\n        });\n        var _node$sortableInfo2 = node.sortableInfo,\n            index = _node$sortableInfo2.index,\n            collection = _node$sortableInfo2.collection;\n        _this.initialFocusedNode = target;\n        _this.manager.isKeySorting = true;\n        _this.manager.active = {\n          index: index,\n          collection: collection\n        };\n\n        _this.handlePress(event);\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"keyMove\", function (shift) {\n        var nodes = _this.manager.getOrderedRefs();\n\n        var lastIndex = nodes[nodes.length - 1].node.sortableInfo.index;\n        var newIndex = _this.newIndex + shift;\n        var prevIndex = _this.newIndex;\n\n        if (newIndex < 0 || newIndex > lastIndex) {\n          return;\n        }\n\n        _this.prevIndex = prevIndex;\n        _this.newIndex = newIndex;\n        var targetIndex = getTargetIndex(_this.newIndex, _this.prevIndex, _this.index);\n        var target = nodes.find(function (_ref2) {\n          var node = _ref2.node;\n          return node.sortableInfo.index === targetIndex;\n        });\n        var targetNode = target.node;\n        var scrollDelta = _this.containerScrollDelta;\n        var targetBoundingClientRect = target.boundingClientRect || getScrollAdjustedBoundingClientRect(targetNode, scrollDelta);\n        var targetTranslate = target.translate || {\n          x: 0,\n          y: 0\n        };\n        var targetPosition = {\n          top: targetBoundingClientRect.top + targetTranslate.y - scrollDelta.top,\n          left: targetBoundingClientRect.left + targetTranslate.x - scrollDelta.left\n        };\n        var shouldAdjustForSize = prevIndex < newIndex;\n        var sizeAdjustment = {\n          x: shouldAdjustForSize && _this.axis.x ? targetNode.offsetWidth - _this.width : 0,\n          y: shouldAdjustForSize && _this.axis.y ? targetNode.offsetHeight - _this.height : 0\n        };\n\n        _this.handleSortMove({\n          pageX: targetPosition.left + sizeAdjustment.x,\n          pageY: targetPosition.top + sizeAdjustment.y,\n          ignoreTransition: shift === 0\n        });\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"keyDrop\", function (event) {\n        _this.handleSortEnd(event);\n\n        if (_this.initialFocusedNode) {\n          _this.initialFocusedNode.focus();\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"handleKeyEnd\", function (event) {\n        if (_this.manager.active) {\n          _this.keyDrop(event);\n        }\n      });\n\n      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), \"isValidSortingTarget\", function (event) {\n        var useDragHandle = _this.props.useDragHandle;\n        var target = event.target;\n        var node = closest(target, function (el) {\n          return el.sortableInfo != null;\n        });\n        return node && node.sortableInfo && !node.sortableInfo.disabled && (useDragHandle ? isSortableHandle(target) : target.sortableInfo);\n      });\n\n      validateProps(props);\n      _this.manager = new Manager();\n      _this.events = {\n        end: _this.handleEnd,\n        move: _this.handleMove,\n        start: _this.handleStart\n      };\n      return _this;\n    }\n\n    _createClass(WithSortableContainer, [{\n      key: \"getChildContext\",\n      value: function getChildContext() {\n        return {\n          manager: this.manager\n        };\n      }\n    }, {\n      key: \"componentDidMount\",\n      value: function componentDidMount() {\n        var _this2 = this;\n\n        var useWindowAsScrollContainer = this.props.useWindowAsScrollContainer;\n        var container = this.getContainer();\n        Promise.resolve(container).then(function (containerNode) {\n          _this2.container = containerNode;\n          _this2.document = _this2.container.ownerDocument || document;\n          var contentWindow = _this2.props.contentWindow || _this2.document.defaultView || window;\n          _this2.contentWindow = typeof contentWindow === 'function' ? contentWindow() : contentWindow;\n          _this2.scrollContainer = useWindowAsScrollContainer ? _this2.document.scrollingElement || _this2.document.documentElement : getScrollingParent(_this2.container) || _this2.container;\n          _this2.autoScroller = new AutoScroller(_this2.scrollContainer, _this2.onAutoScroll);\n          Object.keys(_this2.events).forEach(function (key) {\n            return events[key].forEach(function (eventName) {\n              return _this2.container.addEventListener(eventName, _this2.events[key], false);\n            });\n          });\n\n          _this2.container.addEventListener('keydown', _this2.handleKeyDown);\n        });\n      }\n    }, {\n      key: \"componentWillUnmount\",\n      value: function componentWillUnmount() {\n        var _this3 = this;\n\n        if (this.helper && this.helper.parentNode) {\n          this.helper.parentNode.removeChild(this.helper);\n        }\n\n        if (!this.container) {\n          return;\n        }\n\n        Object.keys(this.events).forEach(function (key) {\n          return events[key].forEach(function (eventName) {\n            return _this3.container.removeEventListener(eventName, _this3.events[key]);\n          });\n        });\n        this.container.removeEventListener('keydown', this.handleKeyDown);\n      }\n    }, {\n      key: \"updateHelperPosition\",\n      value: function updateHelperPosition(event) {\n        var _this$props6 = this.props,\n            lockAxis = _this$props6.lockAxis,\n            lockOffset = _this$props6.lockOffset,\n            lockToContainerEdges = _this$props6.lockToContainerEdges,\n            transitionDuration = _this$props6.transitionDuration,\n            _this$props6$keyboard = _this$props6.keyboardSortingTransitionDuration,\n            keyboardSortingTransitionDuration = _this$props6$keyboard === void 0 ? transitionDuration : _this$props6$keyboard;\n        var isKeySorting = this.manager.isKeySorting;\n        var ignoreTransition = event.ignoreTransition;\n        var offset = getPosition(event);\n        var translate = {\n          x: offset.x - this.initialOffset.x,\n          y: offset.y - this.initialOffset.y\n        };\n        translate.y -= window.pageYOffset - this.initialWindowScroll.top;\n        translate.x -= window.pageXOffset - this.initialWindowScroll.left;\n        this.translate = translate;\n\n        if (lockToContainerEdges) {\n          var _getLockPixelOffsets = getLockPixelOffsets({\n            height: this.height,\n            lockOffset: lockOffset,\n            width: this.width\n          }),\n              _getLockPixelOffsets2 = _slicedToArray(_getLockPixelOffsets, 2),\n              minLockOffset = _getLockPixelOffsets2[0],\n              maxLockOffset = _getLockPixelOffsets2[1];\n\n          var minOffset = {\n            x: this.width / 2 - minLockOffset.x,\n            y: this.height / 2 - minLockOffset.y\n          };\n          var maxOffset = {\n            x: this.width / 2 - maxLockOffset.x,\n            y: this.height / 2 - maxLockOffset.y\n          };\n          translate.x = limit(this.minTranslate.x + minOffset.x, this.maxTranslate.x - maxOffset.x, translate.x);\n          translate.y = limit(this.minTranslate.y + minOffset.y, this.maxTranslate.y - maxOffset.y, translate.y);\n        }\n\n        if (lockAxis === 'x') {\n          translate.y = 0;\n        } else if (lockAxis === 'y') {\n          translate.x = 0;\n        }\n\n        if (isKeySorting && keyboardSortingTransitionDuration && !ignoreTransition) {\n          setTransitionDuration(this.helper, keyboardSortingTransitionDuration);\n        }\n\n        setTranslate3d(this.helper, translate);\n      }\n    }, {\n      key: \"animateNodes\",\n      value: function animateNodes() {\n        var _this$props7 = this.props,\n            transitionDuration = _this$props7.transitionDuration,\n            hideSortableGhost = _this$props7.hideSortableGhost,\n            onSortOver = _this$props7.onSortOver;\n        var containerScrollDelta = this.containerScrollDelta,\n            windowScrollDelta = this.windowScrollDelta;\n        var nodes = this.manager.getOrderedRefs();\n        var sortingOffset = {\n          left: this.offsetEdge.left + this.translate.x + containerScrollDelta.left,\n          top: this.offsetEdge.top + this.translate.y + containerScrollDelta.top\n        };\n        var isKeySorting = this.manager.isKeySorting;\n        var prevIndex = this.newIndex;\n        this.newIndex = null;\n\n        for (var i = 0, len = nodes.length; i < len; i++) {\n          var _node3 = nodes[i].node;\n          var index = _node3.sortableInfo.index;\n          var width = _node3.offsetWidth;\n          var height = _node3.offsetHeight;\n          var offset = {\n            height: this.height > height ? height / 2 : this.height / 2,\n            width: this.width > width ? width / 2 : this.width / 2\n          };\n          var mustShiftBackward = isKeySorting && index > this.index && index <= prevIndex;\n          var mustShiftForward = isKeySorting && index < this.index && index >= prevIndex;\n          var translate = {\n            x: 0,\n            y: 0\n          };\n          var edgeOffset = nodes[i].edgeOffset;\n\n          if (!edgeOffset) {\n            edgeOffset = getEdgeOffset(_node3, this.container);\n            nodes[i].edgeOffset = edgeOffset;\n\n            if (isKeySorting) {\n              nodes[i].boundingClientRect = getScrollAdjustedBoundingClientRect(_node3, containerScrollDelta);\n            }\n          }\n\n          var nextNode = i < nodes.length - 1 && nodes[i + 1];\n          var prevNode = i > 0 && nodes[i - 1];\n\n          if (nextNode && !nextNode.edgeOffset) {\n            nextNode.edgeOffset = getEdgeOffset(nextNode.node, this.container);\n\n            if (isKeySorting) {\n              nextNode.boundingClientRect = getScrollAdjustedBoundingClientRect(nextNode.node, containerScrollDelta);\n            }\n          }\n\n          if (index === this.index) {\n            if (hideSortableGhost) {\n              this.sortableGhost = _node3;\n              setInlineStyles(_node3, {\n                opacity: 0,\n                visibility: 'hidden'\n              });\n            }\n\n            continue;\n          }\n\n          if (transitionDuration) {\n            setTransitionDuration(_node3, transitionDuration);\n          }\n\n          if (this.axis.x) {\n            if (this.axis.y) {\n              if (mustShiftForward || index < this.index && (sortingOffset.left + windowScrollDelta.left - offset.width <= edgeOffset.left && sortingOffset.top + windowScrollDelta.top <= edgeOffset.top + offset.height || sortingOffset.top + windowScrollDelta.top + offset.height <= edgeOffset.top)) {\n                translate.x = this.width + this.marginOffset.x;\n\n                if (edgeOffset.left + translate.x > this.containerBoundingRect.width - offset.width) {\n                  if (nextNode) {\n                    translate.x = nextNode.edgeOffset.left - edgeOffset.left;\n                    translate.y = nextNode.edgeOffset.top - edgeOffset.top;\n                  }\n                }\n\n                if (this.newIndex === null) {\n                  this.newIndex = index;\n                }\n              } else if (mustShiftBackward || index > this.index && (sortingOffset.left + windowScrollDelta.left + offset.width >= edgeOffset.left && sortingOffset.top + windowScrollDelta.top + offset.height >= edgeOffset.top || sortingOffset.top + windowScrollDelta.top + offset.height >= edgeOffset.top + height)) {\n                translate.x = -(this.width + this.marginOffset.x);\n\n                if (edgeOffset.left + translate.x < this.containerBoundingRect.left + offset.width) {\n                  if (prevNode) {\n                    translate.x = prevNode.edgeOffset.left - edgeOffset.left;\n                    translate.y = prevNode.edgeOffset.top - edgeOffset.top;\n                  }\n                }\n\n                this.newIndex = index;\n              }\n            } else {\n              if (mustShiftBackward || index > this.index && sortingOffset.left + windowScrollDelta.left + offset.width >= edgeOffset.left) {\n                translate.x = -(this.width + this.marginOffset.x);\n                this.newIndex = index;\n              } else if (mustShiftForward || index < this.index && sortingOffset.left + windowScrollDelta.left <= edgeOffset.left + offset.width) {\n                translate.x = this.width + this.marginOffset.x;\n\n                if (this.newIndex == null) {\n                  this.newIndex = index;\n                }\n              }\n            }\n          } else if (this.axis.y) {\n            if (mustShiftBackward || index > this.index && sortingOffset.top + windowScrollDelta.top + offset.height >= edgeOffset.top) {\n              translate.y = -(this.height + this.marginOffset.y);\n              this.newIndex = index;\n            } else if (mustShiftForward || index < this.index && sortingOffset.top + windowScrollDelta.top <= edgeOffset.top + offset.height) {\n              translate.y = this.height + this.marginOffset.y;\n\n              if (this.newIndex == null) {\n                this.newIndex = index;\n              }\n            }\n          }\n\n          setTranslate3d(_node3, translate);\n          nodes[i].translate = translate;\n        }\n\n        if (this.newIndex == null) {\n          this.newIndex = this.index;\n        }\n\n        if (isKeySorting) {\n          this.newIndex = prevIndex;\n        }\n\n        var oldIndex = isKeySorting ? this.prevIndex : prevIndex;\n\n        if (onSortOver && this.newIndex !== oldIndex) {\n          onSortOver({\n            collection: this.manager.active.collection,\n            index: this.index,\n            newIndex: this.newIndex,\n            oldIndex: oldIndex,\n            isKeySorting: isKeySorting,\n            nodes: nodes,\n            helper: this.helper\n          });\n        }\n      }\n    }, {\n      key: \"getWrappedInstance\",\n      value: function getWrappedInstance() {\n        invariant(config.withRef, 'To access the wrapped instance, you need to pass in {withRef: true} as the second argument of the SortableContainer() call');\n        return this.refs.wrappedInstance;\n      }\n    }, {\n      key: \"getContainer\",\n      value: function getContainer() {\n        var getContainer = this.props.getContainer;\n\n        if (typeof getContainer !== 'function') {\n          return findDOMNode(this);\n        }\n\n        return getContainer(config.withRef ? this.getWrappedInstance() : undefined);\n      }\n    }, {\n      key: \"render\",\n      value: function render() {\n        var ref = config.withRef ? 'wrappedInstance' : null;\n        return /*#__PURE__*/createElement(WrappedComponent, _extends({\n          ref: ref\n        }, omit(this.props, omittedProps)));\n      }\n    }, {\n      key: \"helperContainer\",\n      get: function get() {\n        var helperContainer = this.props.helperContainer;\n\n        if (typeof helperContainer === 'function') {\n          return helperContainer();\n        }\n\n        return this.props.helperContainer || this.document.body;\n      }\n    }, {\n      key: \"containerScrollDelta\",\n      get: function get() {\n        var useWindowAsScrollContainer = this.props.useWindowAsScrollContainer;\n\n        if (useWindowAsScrollContainer) {\n          return {\n            left: 0,\n            top: 0\n          };\n        }\n\n        return {\n          left: this.scrollContainer.scrollLeft - this.initialScroll.left,\n          top: this.scrollContainer.scrollTop - this.initialScroll.top\n        };\n      }\n    }, {\n      key: \"windowScrollDelta\",\n      get: function get() {\n        return {\n          left: this.contentWindow.pageXOffset - this.initialWindowScroll.left,\n          top: this.contentWindow.pageYOffset - this.initialWindowScroll.top\n        };\n      }\n    }]);\n\n    return WithSortableContainer;\n  }(Component), _defineProperty(_class, \"displayName\", provideDisplayName('sortableList', WrappedComponent)), _defineProperty(_class, \"defaultProps\", defaultProps), _defineProperty(_class, \"propTypes\", propTypes), _defineProperty(_class, \"childContextTypes\", {\n    manager: PropTypes.object.isRequired\n  }), _temp;\n}\n\nvar propTypes$1 = {\n  index: PropTypes.number.isRequired,\n  collection: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),\n  disabled: PropTypes.bool\n};\nvar omittedProps$1 = Object.keys(propTypes$1);\n\nfunction sortableElement(WrappedComponent) {\n  var _class, _temp;\n\n  var config = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {\n    withRef: false\n  };\n  return _temp = _class = function (_React$Component) {\n    _inherits(WithSortableElement, _React$Component);\n\n    function WithSortableElement() {\n      _classCallCheck(this, WithSortableElement);\n\n      return _possibleConstructorReturn(this, _getPrototypeOf(WithSortableElement).apply(this, arguments));\n    }\n\n    _createClass(WithSortableElement, [{\n      key: \"componentDidMount\",\n      value: function componentDidMount() {\n        this.register();\n      }\n    }, {\n      key: \"componentDidUpdate\",\n      value: function componentDidUpdate(prevProps) {\n        if (this.node) {\n          if (prevProps.index !== this.props.index) {\n            this.node.sortableInfo.index = this.props.index;\n          }\n\n          if (prevProps.disabled !== this.props.disabled) {\n            this.node.sortableInfo.disabled = this.props.disabled;\n          }\n        }\n\n        if (prevProps.collection !== this.props.collection) {\n          this.unregister(prevProps.collection);\n          this.register();\n        }\n      }\n    }, {\n      key: \"componentWillUnmount\",\n      value: function componentWillUnmount() {\n        this.unregister();\n      }\n    }, {\n      key: \"register\",\n      value: function register() {\n        var _this$props = this.props,\n            collection = _this$props.collection,\n            disabled = _this$props.disabled,\n            index = _this$props.index;\n        var node = findDOMNode(this);\n        node.sortableInfo = {\n          collection: collection,\n          disabled: disabled,\n          index: index,\n          manager: this.context.manager\n        };\n        this.node = node;\n        this.ref = {\n          node: node\n        };\n        this.context.manager.add(collection, this.ref);\n      }\n    }, {\n      key: \"unregister\",\n      value: function unregister() {\n        var collection = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.props.collection;\n        this.context.manager.remove(collection, this.ref);\n      }\n    }, {\n      key: \"getWrappedInstance\",\n      value: function getWrappedInstance() {\n        invariant(config.withRef, 'To access the wrapped instance, you need to pass in {withRef: true} as the second argument of the SortableElement() call');\n        return this.refs.wrappedInstance;\n      }\n    }, {\n      key: \"render\",\n      value: function render() {\n        var ref = config.withRef ? 'wrappedInstance' : null;\n        return /*#__PURE__*/createElement(WrappedComponent, _extends({\n          ref: ref\n        }, omit(this.props, omittedProps$1)));\n      }\n    }]);\n\n    return WithSortableElement;\n  }(Component), _defineProperty(_class, \"displayName\", provideDisplayName('sortableElement', WrappedComponent)), _defineProperty(_class, \"contextTypes\", {\n    manager: PropTypes.object.isRequired\n  }), _defineProperty(_class, \"propTypes\", propTypes$1), _defineProperty(_class, \"defaultProps\", {\n    collection: 0\n  }), _temp;\n}\n\nexport { sortableContainer as SortableContainer, sortableContainer, sortableElement as SortableElement, sortableElement, sortableHandle as SortableHandle, sortableHandle, arrayMove };"],"sourceRoot":""}