/*! * https://github.com/paulmillr/es6-shim * @license es6-shim Copyright 2013-2014 by Paul Miller (http://paulmillr.com) * and contributors, MIT License * es6-shim: v0.20.2 * see https://github.com/paulmillr/es6-shim/blob/master/LICENSE * Details and documentation: * https://github.com/paulmillr/es6-shim/ */ // UMD (Universal Module Definition) // see https://github.com/umdjs/umd/blob/master/returnExports.js (function (root, factory) { if (typeof define === 'function' && define.amd) { // AMD. Register as an anonymous module. define(factory); } else if (typeof exports === 'object') { // Node. Does not work with strict CommonJS, but // only CommonJS-like enviroments that support module.exports, // like Node. module.exports = factory(); } else { // Browser globals (root is window) root.returnExports = factory(); } }(this, function () { 'use strict'; var isCallableWithoutNew = function (func) { try { func(); } catch (e) { return false; } return true; }; var supportsSubclassing = function (C, f) { /* jshint proto:true */ try { var Sub = function () { C.apply(this, arguments); }; if (!Sub.__proto__) { return false; /* skip test on IE < 11 */ } Object.setPrototypeOf(Sub, C); Sub.prototype = Object.create(C.prototype, { constructor: { value: C } }); return f(Sub); } catch (e) { return false; } }; var arePropertyDescriptorsSupported = function () { try { Object.defineProperty({}, 'x', {}); return true; } catch (e) { /* this is IE 8. */ return false; } }; var startsWithRejectsRegex = function () { var rejectsRegex = false; if (String.prototype.startsWith) { try { '/a/'.startsWith(/a/); } catch (e) { /* this is spec compliant */ rejectsRegex = true; } } return rejectsRegex; }; /*jshint evil: true */ var getGlobal = new Function('return this;'); /*jshint evil: false */ var globals = getGlobal(); var global_isFinite = globals.isFinite; var supportsDescriptors = !!Object.defineProperty && arePropertyDescriptorsSupported(); var startsWithIsCompliant = startsWithRejectsRegex(); var _slice = Array.prototype.slice; var _indexOf = String.prototype.indexOf; var _toString = Object.prototype.toString; var _hasOwnProperty = Object.prototype.hasOwnProperty; var ArrayIterator; // make our implementation private var defineProperty = function (object, name, value, force) { if (!force && name in object) { return; } if (supportsDescriptors) { Object.defineProperty(object, name, { configurable: true, enumerable: false, writable: true, value: value }); } else { object[name] = value; } }; // Define configurable, writable and non-enumerable props // if they don’t exist. var defineProperties = function (object, map) { Object.keys(map).forEach(function (name) { var method = map[name]; defineProperty(object, name, method, false); }); }; // Simple shim for Object.create on ES3 browsers // (unlike real shim, no attempt to support `prototype === null`) var create = Object.create || function (prototype, properties) { function Type() {} Type.prototype = prototype; var object = new Type(); if (typeof properties !== 'undefined') { defineProperties(object, properties); } return object; }; // This is a private name in the es6 spec, equal to '[Symbol.iterator]' // we're going to use an arbitrary _-prefixed name to make our shims // work properly with each other, even though we don't have full Iterator // support. That is, `Array.from(map.keys())` will work, but we don't // pretend to export a "real" Iterator interface. var $iterator$ = (typeof Symbol === 'function' && Symbol.iterator) || '_es6shim_iterator_'; // Firefox ships a partial implementation using the name @@iterator. // https://bugzilla.mozilla.org/show_bug.cgi?id=907077#c14 // So use that name if we detect it. if (globals.Set && typeof new globals.Set()['@@iterator'] === 'function') { $iterator$ = '@@iterator'; } var addIterator = function (prototype, impl) { if (!impl) { impl = function iterator() { return this; }; } var o = {}; o[$iterator$] = impl; defineProperties(prototype, o); /* jshint notypeof: true */ if (!prototype[$iterator$] && typeof $iterator$ === 'symbol') { // implementations are buggy when $iterator$ is a Symbol prototype[$iterator$] = impl; } }; // taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js // can be replaced with require('is-arguments') if we ever use a build process instead var isArguments = function isArguments(value) { var str = _toString.call(value); var result = str === '[object Arguments]'; if (!result) { result = str !== '[object Array]' && value !== null && typeof value === 'object' && typeof value.length === 'number' && value.length >= 0 && _toString.call(value.callee) === '[object Function]'; } return result; }; var emulateES6construct = function (o) { if (!ES.TypeIsObject(o)) { throw new TypeError('bad object'); } // es5 approximation to es6 subclass semantics: in es6, 'new Foo' // would invoke Foo.@@create to allocation/initialize the new object. // In es5 we just get the plain object. So if we detect an // uninitialized object, invoke o.constructor.@@create if (!o._es6construct) { if (o.constructor && ES.IsCallable(o.constructor['@@create'])) { o = o.constructor['@@create'](o); } defineProperties(o, { _es6construct: true }); } return o; }; var ES = { CheckObjectCoercible: function (x, optMessage) { /* jshint eqnull:true */ if (x == null) { throw new TypeError(optMessage || 'Cannot call method on ' + x); } return x; }, TypeIsObject: function (x) { /* jshint eqnull:true */ // this is expensive when it returns false; use this function // when you expect it to return true in the common case. return x != null && Object(x) === x; }, ToObject: function (o, optMessage) { return Object(ES.CheckObjectCoercible(o, optMessage)); }, IsCallable: function (x) { return typeof x === 'function' && // some versions of IE say that typeof /abc/ === 'function' _toString.call(x) === '[object Function]'; }, ToInt32: function (x) { return x >> 0; }, ToUint32: function (x) { return x >>> 0; }, ToInteger: function (value) { var number = +value; if (Number.isNaN(number)) { return 0; } if (number === 0 || !Number.isFinite(number)) { return number; } return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number)); }, ToLength: function (value) { var len = ES.ToInteger(value); if (len <= 0) { return 0; } // includes converting -0 to +0 if (len > Number.MAX_SAFE_INTEGER) { return Number.MAX_SAFE_INTEGER; } return len; }, SameValue: function (a, b) { if (a === b) { // 0 === -0, but they are not identical. if (a === 0) { return 1 / a === 1 / b; } return true; } return Number.isNaN(a) && Number.isNaN(b); }, SameValueZero: function (a, b) { // same as SameValue except for SameValueZero(+0, -0) == true return (a === b) || (Number.isNaN(a) && Number.isNaN(b)); }, IsIterable: function (o) { return ES.TypeIsObject(o) && (typeof o[$iterator$] !== 'undefined' || isArguments(o)); }, GetIterator: function (o) { if (isArguments(o)) { // special case support for `arguments` return new ArrayIterator(o, 'value'); } var it = o[$iterator$](); if (!ES.TypeIsObject(it)) { throw new TypeError('bad iterator'); } return it; }, IteratorNext: function (it) { var result = arguments.length > 1 ? it.next(arguments[1]) : it.next(); if (!ES.TypeIsObject(result)) { throw new TypeError('bad iterator'); } return result; }, Construct: function (C, args) { // CreateFromConstructor var obj; if (ES.IsCallable(C['@@create'])) { obj = C['@@create'](); } else { // OrdinaryCreateFromConstructor obj = create(C.prototype || null); } // Mark that we've used the es6 construct path // (see emulateES6construct) defineProperties(obj, { _es6construct: true }); // Call the constructor. var result = C.apply(obj, args); return ES.TypeIsObject(result) ? result : obj; } }; var numberConversion = (function () { // from https://github.com/inexorabletash/polyfill/blob/master/typedarray.js#L176-L266 // with permission and license, per https://twitter.com/inexorabletash/status/372206509540659200 function roundToEven(n) { var w = Math.floor(n), f = n - w; if (f < 0.5) { return w; } if (f > 0.5) { return w + 1; } return w % 2 ? w + 1 : w; } function packIEEE754(v, ebits, fbits) { var bias = (1 << (ebits - 1)) - 1, s, e, f, ln, i, bits, str, bytes; // Compute sign, exponent, fraction if (v !== v) { // NaN // http://dev.w3.org/2006/webapi/WebIDL/#es-type-mapping e = (1 << ebits) - 1; f = Math.pow(2, fbits - 1); s = 0; } else if (v === Infinity || v === -Infinity) { e = (1 << ebits) - 1; f = 0; s = (v < 0) ? 1 : 0; } else if (v === 0) { e = 0; f = 0; s = (1 / v === -Infinity) ? 1 : 0; } else { s = v < 0; v = Math.abs(v); if (v >= Math.pow(2, 1 - bias)) { e = Math.min(Math.floor(Math.log(v) / Math.LN2), 1023); f = roundToEven(v / Math.pow(2, e) * Math.pow(2, fbits)); if (f / Math.pow(2, fbits) >= 2) { e = e + 1; f = 1; } if (e > bias) { // Overflow e = (1 << ebits) - 1; f = 0; } else { // Normal e = e + bias; f = f - Math.pow(2, fbits); } } else { // Subnormal e = 0; f = roundToEven(v / Math.pow(2, 1 - bias - fbits)); } } // Pack sign, exponent, fraction bits = []; for (i = fbits; i; i -= 1) { bits.push(f % 2 ? 1 : 0); f = Math.floor(f / 2); } for (i = ebits; i; i -= 1) { bits.push(e % 2 ? 1 : 0); e = Math.floor(e / 2); } bits.push(s ? 1 : 0); bits.reverse(); str = bits.join(''); // Bits to bytes bytes = []; while (str.length) { bytes.push(parseInt(str.slice(0, 8), 2)); str = str.slice(8); } return bytes; } function unpackIEEE754(bytes, ebits, fbits) { // Bytes to bits var bits = [], i, j, b, str, bias, s, e, f; for (i = bytes.length; i; i -= 1) { b = bytes[i - 1]; for (j = 8; j; j -= 1) { bits.push(b % 2 ? 1 : 0); b = b >> 1; } } bits.reverse(); str = bits.join(''); // Unpack sign, exponent, fraction bias = (1 << (ebits - 1)) - 1; s = parseInt(str.slice(0, 1), 2) ? -1 : 1; e = parseInt(str.slice(1, 1 + ebits), 2); f = parseInt(str.slice(1 + ebits), 2); // Produce number if (e === (1 << ebits) - 1) { return f !== 0 ? NaN : s * Infinity; } else if (e > 0) { // Normalized return s * Math.pow(2, e - bias) * (1 + f / Math.pow(2, fbits)); } else if (f !== 0) { // Denormalized return s * Math.pow(2, -(bias - 1)) * (f / Math.pow(2, fbits)); } else { return s < 0 ? -0 : 0; } } function unpackFloat64(b) { return unpackIEEE754(b, 11, 52); } function packFloat64(v) { return packIEEE754(v, 11, 52); } function unpackFloat32(b) { return unpackIEEE754(b, 8, 23); } function packFloat32(v) { return packIEEE754(v, 8, 23); } var conversions = { toFloat32: function (num) { return unpackFloat32(packFloat32(num)); } }; if (typeof Float32Array !== 'undefined') { var float32array = new Float32Array(1); conversions.toFloat32 = function (num) { float32array[0] = num; return float32array[0]; }; } return conversions; }()); defineProperties(String, { fromCodePoint: function (_) { // length = 1 var points = _slice.call(arguments, 0, arguments.length); var result = []; var next; for (var i = 0, length = points.length; i < length; i++) { next = Number(points[i]); if (!ES.SameValue(next, ES.ToInteger(next)) || next < 0 || next > 0x10FFFF) { throw new RangeError('Invalid code point ' + next); } if (next < 0x10000) { result.push(String.fromCharCode(next)); } else { next -= 0x10000; result.push(String.fromCharCode((next >> 10) + 0xD800)); result.push(String.fromCharCode((next % 0x400) + 0xDC00)); } } return result.join(''); }, raw: function (callSite) { // raw.length===1 var substitutions = _slice.call(arguments, 1, arguments.length); var cooked = ES.ToObject(callSite, 'bad callSite'); var rawValue = cooked.raw; var raw = ES.ToObject(rawValue, 'bad raw value'); var len = Object.keys(raw).length; var literalsegments = ES.ToLength(len); if (literalsegments === 0) { return ''; } var stringElements = []; var nextIndex = 0; var nextKey, next, nextSeg, nextSub; while (nextIndex < literalsegments) { nextKey = String(nextIndex); next = raw[nextKey]; nextSeg = String(next); stringElements.push(nextSeg); if (nextIndex + 1 >= literalsegments) { break; } next = substitutions[nextKey]; if (typeof next === 'undefined') { break; } nextSub = String(next); stringElements.push(nextSub); nextIndex++; } return stringElements.join(''); } }); // Firefox 31 reports this function's length as 0 // https://bugzilla.mozilla.org/show_bug.cgi?id=1062484 if (String.fromCodePoint.length !== 1) { var originalFromCodePoint = String.fromCodePoint; defineProperty(String, 'fromCodePoint', function (_) { return originalFromCodePoint.apply(this, arguments); }, true); } var StringShims = { // Fast repeat, uses the `Exponentiation by squaring` algorithm. // Perf: http://jsperf.com/string-repeat2/2 repeat: (function () { var repeat = function (s, times) { if (times < 1) { return ''; } if (times % 2) { return repeat(s, times - 1) + s; } var half = repeat(s, times / 2); return half + half; }; return function (times) { var thisStr = String(ES.CheckObjectCoercible(this)); times = ES.ToInteger(times); if (times < 0 || times === Infinity) { throw new RangeError('Invalid String#repeat value'); } return repeat(thisStr, times); }; })(), startsWith: function (searchStr) { var thisStr = String(ES.CheckObjectCoercible(this)); if (_toString.call(searchStr) === '[object RegExp]') { throw new TypeError('Cannot call method "startsWith" with a regex'); } searchStr = String(searchStr); var startArg = arguments.length > 1 ? arguments[1] : void 0; var start = Math.max(ES.ToInteger(startArg), 0); return thisStr.slice(start, start + searchStr.length) === searchStr; }, endsWith: function (searchStr) { var thisStr = String(ES.CheckObjectCoercible(this)); if (_toString.call(searchStr) === '[object RegExp]') { throw new TypeError('Cannot call method "endsWith" with a regex'); } searchStr = String(searchStr); var thisLen = thisStr.length; var posArg = arguments.length > 1 ? arguments[1] : void 0; var pos = typeof posArg === 'undefined' ? thisLen : ES.ToInteger(posArg); var end = Math.min(Math.max(pos, 0), thisLen); return thisStr.slice(end - searchStr.length, end) === searchStr; }, contains: function (searchString) { var position = arguments.length > 1 ? arguments[1] : void 0; // Somehow this trick makes method 100% compat with the spec. return _indexOf.call(this, searchString, position) !== -1; }, codePointAt: function (pos) { var thisStr = String(ES.CheckObjectCoercible(this)); var position = ES.ToInteger(pos); var length = thisStr.length; if (position < 0 || position >= length) { return; } var first = thisStr.charCodeAt(position); var isEnd = (position + 1 === length); if (first < 0xD800 || first > 0xDBFF || isEnd) { return first; } var second = thisStr.charCodeAt(position + 1); if (second < 0xDC00 || second > 0xDFFF) { return first; } return ((first - 0xD800) * 1024) + (second - 0xDC00) + 0x10000; } }; defineProperties(String.prototype, StringShims); var hasStringTrimBug = '\u0085'.trim().length !== 1; if (hasStringTrimBug) { var originalStringTrim = String.prototype.trim; delete String.prototype.trim; // whitespace from: http://es5.github.io/#x15.5.4.20 // implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324 var ws = [ '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003', '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028', '\u2029\uFEFF' ].join(''); var trimRegexp = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g'); defineProperties(String.prototype, { trim: function () { if (typeof this === 'undefined' || this === null) { throw new TypeError("can't convert " + this + ' to object'); } return String(this).replace(trimRegexp, ''); } }); } // see https://people.mozilla.org/~jorendorff/es6-draft.html#sec-string.prototype-@@iterator var StringIterator = function (s) { this._s = String(ES.CheckObjectCoercible(s)); this._i = 0; }; StringIterator.prototype.next = function () { var s = this._s, i = this._i; if (typeof s === 'undefined' || i >= s.length) { this._s = void 0; return { value: void 0, done: true }; } var first = s.charCodeAt(i), second, len; if (first < 0xD800 || first > 0xDBFF || (i + 1) == s.length) { len = 1; } else { second = s.charCodeAt(i + 1); len = (second < 0xDC00 || second > 0xDFFF) ? 1 : 2; } this._i = i + len; return { value: s.substr(i, len), done: false }; }; addIterator(StringIterator.prototype); addIterator(String.prototype, function () { return new StringIterator(this); }); if (!startsWithIsCompliant) { // Firefox has a noncompliant startsWith implementation String.prototype.startsWith = StringShims.startsWith; String.prototype.endsWith = StringShims.endsWith; } var ArrayShims = { from: function (iterable) { var mapFn = arguments.length > 1 ? arguments[1] : void 0; var list = ES.ToObject(iterable, 'bad iterable'); if (typeof mapFn !== 'undefined' && !ES.IsCallable(mapFn)) { throw new TypeError('Array.from: when provided, the second argument must be a function'); } var hasThisArg = arguments.length > 2; var thisArg = hasThisArg ? arguments[2] : void 0; var usingIterator = ES.IsIterable(list); // does the spec really mean that Arrays should use ArrayIterator? // https://bugs.ecmascript.org/show_bug.cgi?id=2416 //if (Array.isArray(list)) { usingIterator=false; } var length; var result, i, value; if (usingIterator) { i = 0; result = ES.IsCallable(this) ? Object(new this()) : []; var it = usingIterator ? ES.GetIterator(list) : null; var iterationValue; do { iterationValue = ES.IteratorNext(it); if (!iterationValue.done) { value = iterationValue.value; if (mapFn) { result[i] = hasThisArg ? mapFn.call(thisArg, value, i) : mapFn(value, i); } else { result[i] = value; } i += 1; } } while (!iterationValue.done); length = i; } else { length = ES.ToLength(list.length); result = ES.IsCallable(this) ? Object(new this(length)) : new Array(length); for (i = 0; i < length; ++i) { value = list[i]; if (mapFn) { result[i] = hasThisArg ? mapFn.call(thisArg, value, i) : mapFn(value, i); } else { result[i] = value; } } } result.length = length; return result; }, of: function () { return Array.from(arguments); } }; defineProperties(Array, ArrayShims); var arrayFromSwallowsNegativeLengths = function () { try { return Array.from({ length: -1 }).length === 0; } catch (e) { return false; } }; // Fixes a Firefox bug in v32 // https://bugzilla.mozilla.org/show_bug.cgi?id=1063993 if (!arrayFromSwallowsNegativeLengths()) { defineProperty(Array, 'from', ArrayShims.from, true); } // Our ArrayIterator is private; see // https://github.com/paulmillr/es6-shim/issues/252 ArrayIterator = function (array, kind) { this.i = 0; this.array = array; this.kind = kind; }; defineProperties(ArrayIterator.prototype, { next: function () { var i = this.i, array = this.array; if (!(this instanceof ArrayIterator)) { throw new TypeError('Not an ArrayIterator'); } if (typeof array !== 'undefined') { var len = ES.ToLength(array.length); for (; i < len; i++) { var kind = this.kind; var retval; if (kind === 'key') { retval = i; } else if (kind === 'value') { retval = array[i]; } else if (kind === 'entry') { retval = [i, array[i]]; } this.i = i + 1; return { value: retval, done: false }; } } this.array = void 0; return { value: void 0, done: true }; } }); addIterator(ArrayIterator.prototype); var ArrayPrototypeShims = { copyWithin: function (target, start) { var end = arguments[2]; // copyWithin.length must be 2 var o = ES.ToObject(this); var len = ES.ToLength(o.length); target = ES.ToInteger(target); start = ES.ToInteger(start); var to = target < 0 ? Math.max(len + target, 0) : Math.min(target, len); var from = start < 0 ? Math.max(len + start, 0) : Math.min(start, len); end = typeof end === 'undefined' ? len : ES.ToInteger(end); var fin = end < 0 ? Math.max(len + end, 0) : Math.min(end, len); var count = Math.min(fin - from, len - to); var direction = 1; if (from < to && to < (from + count)) { direction = -1; from += count - 1; to += count - 1; } while (count > 0) { if (_hasOwnProperty.call(o, from)) { o[to] = o[from]; } else { delete o[from]; } from += direction; to += direction; count -= 1; } return o; }, fill: function (value) { var start = arguments.length > 1 ? arguments[1] : void 0; var end = arguments.length > 2 ? arguments[2] : void 0; var O = ES.ToObject(this); var len = ES.ToLength(O.length); start = ES.ToInteger(typeof start === 'undefined' ? 0 : start); end = ES.ToInteger(typeof end === 'undefined' ? len : end); var relativeStart = start < 0 ? Math.max(len + start, 0) : Math.min(start, len); var relativeEnd = end < 0 ? len + end : end; for (var i = relativeStart; i < len && i < relativeEnd; ++i) { O[i] = value; } return O; }, find: function find(predicate) { var list = ES.ToObject(this); var length = ES.ToLength(list.length); if (!ES.IsCallable(predicate)) { throw new TypeError('Array#find: predicate must be a function'); } var thisArg = arguments[1]; for (var i = 0, value; i < length; i++) { value = list[i]; if (predicate.call(thisArg, value, i, list)) { return value; } } return; }, findIndex: function findIndex(predicate) { var list = ES.ToObject(this); var length = ES.ToLength(list.length); if (!ES.IsCallable(predicate)) { throw new TypeError('Array#findIndex: predicate must be a function'); } var thisArg = arguments[1]; for (var i = 0; i < length; i++) { if (predicate.call(thisArg, list[i], i, list)) { return i; } } return -1; }, keys: function () { return new ArrayIterator(this, 'key'); }, values: function () { return new ArrayIterator(this, 'value'); }, entries: function () { return new ArrayIterator(this, 'entry'); } }; // Safari 7.1 defines Array#keys and Array#entries natively, // but the resulting ArrayIterator objects don't have a "next" method. if (Array.prototype.keys && !ES.IsCallable([1].keys().next)) { delete Array.prototype.keys; } if (Array.prototype.entries && !ES.IsCallable([1].entries().next)) { delete Array.prototype.entries; } defineProperties(Array.prototype, ArrayPrototypeShims); addIterator(Array.prototype, function () { return this.values(); }); // Chrome defines keys/values/entries on Array, but doesn't give us // any way to identify its iterator. So add our own shimmed field. if (Object.getPrototypeOf) { addIterator(Object.getPrototypeOf([].values())); } var maxSafeInteger = Math.pow(2, 53) - 1; defineProperties(Number, { MAX_SAFE_INTEGER: maxSafeInteger, MIN_SAFE_INTEGER: -maxSafeInteger, EPSILON: 2.220446049250313e-16, parseInt: globals.parseInt, parseFloat: globals.parseFloat, isFinite: function (value) { return typeof value === 'number' && global_isFinite(value); }, isInteger: function (value) { return Number.isFinite(value) && ES.ToInteger(value) === value; }, isSafeInteger: function (value) { return Number.isInteger(value) && Math.abs(value) <= Number.MAX_SAFE_INTEGER; }, isNaN: function (value) { // NaN !== NaN, but they are identical. // NaNs are the only non-reflexive value, i.e., if x !== x, // then x is NaN. // isNaN is broken: it converts its argument to number, so // isNaN('foo') => true return value !== value; } }); // Work around bugs in Array#find and Array#findIndex -- early // implementations skipped holes in sparse arrays. (Note that the // implementations of find/findIndex indirectly use shimmed // methods of Number, so this test has to happen down here.) if (![, 1].find(function (item, idx) { return idx === 0; })) { defineProperty(Array.prototype, 'find', ArrayPrototypeShims.find, true); } if ([, 1].findIndex(function (item, idx) { return idx === 0; }) !== 0) { defineProperty(Array.prototype, 'findIndex', ArrayPrototypeShims.findIndex, true); } if (supportsDescriptors) { defineProperties(Object, { getPropertyDescriptor: function (subject, name) { var pd = Object.getOwnPropertyDescriptor(subject, name); var proto = Object.getPrototypeOf(subject); while (typeof pd === 'undefined' && proto !== null) { pd = Object.getOwnPropertyDescriptor(proto, name); proto = Object.getPrototypeOf(proto); } return pd; }, getPropertyNames: function (subject) { var result = Object.getOwnPropertyNames(subject); var proto = Object.getPrototypeOf(subject); var addProperty = function (property) { if (result.indexOf(property) === -1) { result.push(property); } }; while (proto !== null) { Object.getOwnPropertyNames(proto).forEach(addProperty); proto = Object.getPrototypeOf(proto); } return result; } }); defineProperties(Object, { // 19.1.3.1 assign: function (target, source) { if (!ES.TypeIsObject(target)) { throw new TypeError('target must be an object'); } return Array.prototype.reduce.call(arguments, function (target, source) { return Object.keys(Object(source)).reduce(function (target, key) { target[key] = source[key]; return target; }, target); }); }, is: function (a, b) { return ES.SameValue(a, b); }, // 19.1.3.9 // shim from https://gist.github.com/WebReflection/5593554 setPrototypeOf: (function (Object, magic) { var set; var checkArgs = function (O, proto) { if (!ES.TypeIsObject(O)) { throw new TypeError('cannot set prototype on a non-object'); } if (!(proto === null || ES.TypeIsObject(proto))) { throw new TypeError('can only set prototype to an object or null' + proto); } }; var setPrototypeOf = function (O, proto) { checkArgs(O, proto); set.call(O, proto); return O; }; try { // this works already in Firefox and Safari set = Object.getOwnPropertyDescriptor(Object.prototype, magic).set; set.call({}, null); } catch (e) { if (Object.prototype !== {}[magic]) { // IE < 11 cannot be shimmed return; } // probably Chrome or some old Mobile stock browser set = function (proto) { this[magic] = proto; }; // please note that this will **not** work // in those browsers that do not inherit // __proto__ by mistake from Object.prototype // in these cases we should probably throw an error // or at least be informed about the issue setPrototypeOf.polyfill = setPrototypeOf( setPrototypeOf({}, null), Object.prototype ) instanceof Object; // setPrototypeOf.polyfill === true means it works as meant // setPrototypeOf.polyfill === false means it's not 100% reliable // setPrototypeOf.polyfill === undefined // or // setPrototypeOf.polyfill == null means it's not a polyfill // which means it works as expected // we can even delete Object.prototype.__proto__; } return setPrototypeOf; })(Object, '__proto__') }); } // Workaround bug in Opera 12 where setPrototypeOf(x, null) doesn't work, // but Object.create(null) does. if (Object.setPrototypeOf && Object.getPrototypeOf && Object.getPrototypeOf(Object.setPrototypeOf({}, null)) !== null && Object.getPrototypeOf(Object.create(null)) === null) { (function () { var FAKENULL = Object.create(null); var gpo = Object.getPrototypeOf, spo = Object.setPrototypeOf; Object.getPrototypeOf = function (o) { var result = gpo(o); return result === FAKENULL ? null : result; }; Object.setPrototypeOf = function (o, p) { if (p === null) { p = FAKENULL; } return spo(o, p); }; Object.setPrototypeOf.polyfill = false; })(); } try { Object.keys('foo'); } catch (e) { var originalObjectKeys = Object.keys; Object.keys = function (obj) { return originalObjectKeys(ES.ToObject(obj)); }; } var MathShims = { acosh: function (value) { value = Number(value); if (Number.isNaN(value) || value < 1) { return NaN; } if (value === 1) { return 0; } if (value === Infinity) { return value; } return Math.log(value + Math.sqrt(value * value - 1)); }, asinh: function (value) { value = Number(value); if (value === 0 || !global_isFinite(value)) { return value; } return value < 0 ? -Math.asinh(-value) : Math.log(value + Math.sqrt(value * value + 1)); }, atanh: function (value) { value = Number(value); if (Number.isNaN(value) || value < -1 || value > 1) { return NaN; } if (value === -1) { return -Infinity; } if (value === 1) { return Infinity; } if (value === 0) { return value; } return 0.5 * Math.log((1 + value) / (1 - value)); }, cbrt: function (value) { value = Number(value); if (value === 0) { return value; } var negate = value < 0, result; if (negate) { value = -value; } result = Math.pow(value, 1 / 3); return negate ? -result : result; }, clz32: function (value) { // See https://bugs.ecmascript.org/show_bug.cgi?id=2465 value = Number(value); var number = ES.ToUint32(value); if (number === 0) { return 32; } return 32 - (number).toString(2).length; }, cosh: function (value) { value = Number(value); if (value === 0) { return 1; } // +0 or -0 if (Number.isNaN(value)) { return NaN; } if (!global_isFinite(value)) { return Infinity; } if (value < 0) { value = -value; } if (value > 21) { return Math.exp(value) / 2; } return (Math.exp(value) + Math.exp(-value)) / 2; }, expm1: function (value) { value = Number(value); if (value === -Infinity) { return -1; } if (!global_isFinite(value) || value === 0) { return value; } return Math.exp(value) - 1; }, hypot: function (x, y) { var anyNaN = false; var allZero = true; var anyInfinity = false; var numbers = []; Array.prototype.every.call(arguments, function (arg) { var num = Number(arg); if (Number.isNaN(num)) { anyNaN = true; } else if (num === Infinity || num === -Infinity) { anyInfinity = true; } else if (num !== 0) { allZero = false; } if (anyInfinity) { return false; } else if (!anyNaN) { numbers.push(Math.abs(num)); } return true; }); if (anyInfinity) { return Infinity; } if (anyNaN) { return NaN; } if (allZero) { return 0; } numbers.sort(function (a, b) { return b - a; }); var largest = numbers[0]; var divided = numbers.map(function (number) { return number / largest; }); var sum = divided.reduce(function (sum, number) { return sum += number * number; }, 0); return largest * Math.sqrt(sum); }, log2: function (value) { return Math.log(value) * Math.LOG2E; }, log10: function (value) { return Math.log(value) * Math.LOG10E; }, log1p: function (value) { value = Number(value); if (value < -1 || Number.isNaN(value)) { return NaN; } if (value === 0 || value === Infinity) { return value; } if (value === -1) { return -Infinity; } var result = 0; var n = 50; if (value < 0 || value > 1) { return Math.log(1 + value); } for (var i = 1; i < n; i++) { if ((i % 2) === 0) { result -= Math.pow(value, i) / i; } else { result += Math.pow(value, i) / i; } } return result; }, sign: function (value) { var number = +value; if (number === 0) { return number; } if (Number.isNaN(number)) { return number; } return number < 0 ? -1 : 1; }, sinh: function (value) { value = Number(value); if (!global_isFinite(value) || value === 0) { return value; } return (Math.exp(value) - Math.exp(-value)) / 2; }, tanh: function (value) { value = Number(value); if (Number.isNaN(value) || value === 0) { return value; } if (value === Infinity) { return 1; } if (value === -Infinity) { return -1; } return (Math.exp(value) - Math.exp(-value)) / (Math.exp(value) + Math.exp(-value)); }, trunc: function (value) { var number = Number(value); return number < 0 ? -Math.floor(-number) : Math.floor(number); }, imul: function (x, y) { // taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul x = ES.ToUint32(x); y = ES.ToUint32(y); var ah = (x >>> 16) & 0xffff; var al = x & 0xffff; var bh = (y >>> 16) & 0xffff; var bl = y & 0xffff; // the shift by 0 fixes the sign on the high part // the final |0 converts the unsigned value into a signed value return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)|0); }, fround: function (x) { if (x === 0 || x === Infinity || x === -Infinity || Number.isNaN(x)) { return x; } var num = Number(x); return numberConversion.toFloat32(num); } }; defineProperties(Math, MathShims); if (Math.imul(0xffffffff, 5) !== -5) { // Safari 6.1, at least, reports "0" for this value Math.imul = MathShims.imul; } // Promises // Simplest possible implementation; use a 3rd-party library if you // want the best possible speed and/or long stack traces. var PromiseShim = (function () { var Promise, Promise$prototype; ES.IsPromise = function (promise) { if (!ES.TypeIsObject(promise)) { return false; } if (!promise._promiseConstructor) { // _promiseConstructor is a bit more unique than _status, so we'll // check that instead of the [[PromiseStatus]] internal field. return false; } if (typeof promise._status === 'undefined') { return false; // uninitialized } return true; }; // "PromiseCapability" in the spec is what most promise implementations // call a "deferred". var PromiseCapability = function (C) { if (!ES.IsCallable(C)) { throw new TypeError('bad promise constructor'); } var capability = this; var resolver = function (resolve, reject) { capability.resolve = resolve; capability.reject = reject; }; capability.promise = ES.Construct(C, [resolver]); // see https://bugs.ecmascript.org/show_bug.cgi?id=2478 if (!capability.promise._es6construct) { throw new TypeError('bad promise constructor'); } if (!(ES.IsCallable(capability.resolve) && ES.IsCallable(capability.reject))) { throw new TypeError('bad promise constructor'); } }; // find an appropriate setImmediate-alike var setTimeout = globals.setTimeout; var makeZeroTimeout; if (typeof window !== 'undefined' && ES.IsCallable(window.postMessage)) { makeZeroTimeout = function () { // from http://dbaron.org/log/20100309-faster-timeouts var timeouts = []; var messageName = 'zero-timeout-message'; var setZeroTimeout = function (fn) { timeouts.push(fn); window.postMessage(messageName, '*'); }; var handleMessage = function (event) { if (event.source == window && event.data == messageName) { event.stopPropagation(); if (timeouts.length === 0) { return; } var fn = timeouts.shift(); fn(); } }; window.addEventListener('message', handleMessage, true); return setZeroTimeout; }; } var makePromiseAsap = function () { // An efficient task-scheduler based on a pre-existing Promise // implementation, which we can use even if we override the // global Promise below (in order to workaround bugs) // https://github.com/Raynos/observ-hash/issues/2#issuecomment-35857671 var P = globals.Promise; return P && P.resolve && function (task) { return P.resolve().then(task); }; }; var enqueue = ES.IsCallable(globals.setImmediate) ? globals.setImmediate.bind(globals) : typeof process === 'object' && process.nextTick ? process.nextTick : makePromiseAsap() || (ES.IsCallable(makeZeroTimeout) ? makeZeroTimeout() : function (task) { setTimeout(task, 0); }); // fallback var triggerPromiseReactions = function (reactions, x) { reactions.forEach(function (reaction) { enqueue(function () { // PromiseReactionTask var handler = reaction.handler; var capability = reaction.capability; var resolve = capability.resolve; var reject = capability.reject; try { var result = handler(x); if (result === capability.promise) { throw new TypeError('self resolution'); } var updateResult = updatePromiseFromPotentialThenable(result, capability); if (!updateResult) { resolve(result); } } catch (e) { reject(e); } }); }); }; var updatePromiseFromPotentialThenable = function (x, capability) { if (!ES.TypeIsObject(x)) { return false; } var resolve = capability.resolve; var reject = capability.reject; try { var then = x.then; // only one invocation of accessor if (!ES.IsCallable(then)) { return false; } then.call(x, resolve, reject); } catch (e) { reject(e); } return true; }; var promiseResolutionHandler = function (promise, onFulfilled, onRejected) { return function (x) { if (x === promise) { return onRejected(new TypeError('self resolution')); } var C = promise._promiseConstructor; var capability = new PromiseCapability(C); var updateResult = updatePromiseFromPotentialThenable(x, capability); if (updateResult) { return capability.promise.then(onFulfilled, onRejected); } else { return onFulfilled(x); } }; }; Promise = function (resolver) { var promise = this; promise = emulateES6construct(promise); if (!promise._promiseConstructor) { // we use _promiseConstructor as a stand-in for the internal // [[PromiseStatus]] field; it's a little more unique. throw new TypeError('bad promise'); } if (typeof promise._status !== 'undefined') { throw new TypeError('promise already initialized'); } // see https://bugs.ecmascript.org/show_bug.cgi?id=2482 if (!ES.IsCallable(resolver)) { throw new TypeError('not a valid resolver'); } promise._status = 'unresolved'; promise._resolveReactions = []; promise._rejectReactions = []; var resolve = function (resolution) { if (promise._status !== 'unresolved') { return; } var reactions = promise._resolveReactions; promise._result = resolution; promise._resolveReactions = void 0; promise._rejectReactions = void 0; promise._status = 'has-resolution'; triggerPromiseReactions(reactions, resolution); }; var reject = function (reason) { if (promise._status !== 'unresolved') { return; } var reactions = promise._rejectReactions; promise._result = reason; promise._resolveReactions = void 0; promise._rejectReactions = void 0; promise._status = 'has-rejection'; triggerPromiseReactions(reactions, reason); }; try { resolver(resolve, reject); } catch (e) { reject(e); } return promise; }; Promise$prototype = Promise.prototype; defineProperties(Promise, { '@@create': function (obj) { var constructor = this; // AllocatePromise // The `obj` parameter is a hack we use for es5 // compatibility. var prototype = constructor.prototype || Promise$prototype; obj = obj || create(prototype); defineProperties(obj, { _status: void 0, _result: void 0, _resolveReactions: void 0, _rejectReactions: void 0, _promiseConstructor: void 0 }); obj._promiseConstructor = constructor; return obj; } }); var _promiseAllResolver = function (index, values, capability, remaining) { var done = false; return function (x) { if (done) { return; } // protect against being called multiple times done = true; values[index] = x; if ((--remaining.count) === 0) { var resolve = capability.resolve; resolve(values); // call w/ this===undefined } }; }; Promise.all = function (iterable) { var C = this; var capability = new PromiseCapability(C); var resolve = capability.resolve; var reject = capability.reject; try { if (!ES.IsIterable(iterable)) { throw new TypeError('bad iterable'); } var it = ES.GetIterator(iterable); var values = [], remaining = { count: 1 }; for (var index = 0; ; index++) { var next = ES.IteratorNext(it); if (next.done) { break; } var nextPromise = C.resolve(next.value); var resolveElement = _promiseAllResolver( index, values, capability, remaining ); remaining.count++; nextPromise.then(resolveElement, capability.reject); } if ((--remaining.count) === 0) { resolve(values); // call w/ this===undefined } } catch (e) { reject(e); } return capability.promise; }; Promise.race = function (iterable) { var C = this; var capability = new PromiseCapability(C); var resolve = capability.resolve; var reject = capability.reject; try { if (!ES.IsIterable(iterable)) { throw new TypeError('bad iterable'); } var it = ES.GetIterator(iterable); while (true) { var next = ES.IteratorNext(it); if (next.done) { // If iterable has no items, resulting promise will never // resolve; see: // https://github.com/domenic/promises-unwrapping/issues/75 // https://bugs.ecmascript.org/show_bug.cgi?id=2515 break; } var nextPromise = C.resolve(next.value); nextPromise.then(resolve, reject); } } catch (e) { reject(e); } return capability.promise; }; Promise.reject = function (reason) { var C = this; var capability = new PromiseCapability(C); var reject = capability.reject; reject(reason); // call with this===undefined return capability.promise; }; Promise.resolve = function (v) { var C = this; if (ES.IsPromise(v)) { var constructor = v._promiseConstructor; if (constructor === C) { return v; } } var capability = new PromiseCapability(C); var resolve = capability.resolve; resolve(v); // call with this===undefined return capability.promise; }; Promise.prototype['catch'] = function (onRejected) { return this.then(void 0, onRejected); }; Promise.prototype.then = function (onFulfilled, onRejected) { var promise = this; if (!ES.IsPromise(promise)) { throw new TypeError('not a promise'); } // this.constructor not this._promiseConstructor; see // https://bugs.ecmascript.org/show_bug.cgi?id=2513 var C = this.constructor; var capability = new PromiseCapability(C); if (!ES.IsCallable(onRejected)) { onRejected = function (e) { throw e; }; } if (!ES.IsCallable(onFulfilled)) { onFulfilled = function (x) { return x; }; } var resolutionHandler = promiseResolutionHandler(promise, onFulfilled, onRejected); var resolveReaction = { capability: capability, handler: resolutionHandler }; var rejectReaction = { capability: capability, handler: onRejected }; switch (promise._status) { case 'unresolved': promise._resolveReactions.push(resolveReaction); promise._rejectReactions.push(rejectReaction); break; case 'has-resolution': triggerPromiseReactions([resolveReaction], promise._result); break; case 'has-rejection': triggerPromiseReactions([rejectReaction], promise._result); break; default: throw new TypeError('unexpected'); } return capability.promise; }; return Promise; })(); // export the Promise constructor. defineProperties(globals, { Promise: PromiseShim }); // In Chrome 33 (and thereabouts) Promise is defined, but the // implementation is buggy in a number of ways. Let's check subclassing // support to see if we have a buggy implementation. var promiseSupportsSubclassing = supportsSubclassing(globals.Promise, function (S) { return S.resolve(42) instanceof S; }); var promiseIgnoresNonFunctionThenCallbacks = (function () { try { globals.Promise.reject(42).then(null, 5).then(null, function () {}); return true; } catch (ex) { return false; } }()); var promiseRequiresObjectContext = (function () { try { Promise.call(3, function () {}); } catch (e) { return true; } return false; }()); if (!promiseSupportsSubclassing || !promiseIgnoresNonFunctionThenCallbacks || !promiseRequiresObjectContext) { globals.Promise = PromiseShim; } // Map and Set require a true ES5 environment // Their fast path also requires that the environment preserve // property insertion order, which is not guaranteed by the spec. var testOrder = function (a) { var b = Object.keys(a.reduce(function (o, k) { o[k] = true; return o; }, {})); return a.join(':') === b.join(':'); }; var preservesInsertionOrder = testOrder(['z', 'a', 'bb']); // some engines (eg, Chrome) only preserve insertion order for string keys var preservesNumericInsertionOrder = testOrder(['z', 1, 'a', '3', 2]); if (supportsDescriptors) { var fastkey = function fastkey(key) { if (!preservesInsertionOrder) { return null; } var type = typeof key; if (type === 'string') { return '$' + key; } else if (type === 'number') { // note that -0 will get coerced to "0" when used as a property key if (!preservesNumericInsertionOrder) { return 'n' + key; } return key; } return null; }; var emptyObject = function emptyObject() { // accomodate some older not-quite-ES5 browsers return Object.create ? Object.create(null) : {}; }; var collectionShims = { Map: (function () { var empty = {}; function MapEntry(key, value) { this.key = key; this.value = value; this.next = null; this.prev = null; } MapEntry.prototype.isRemoved = function () { return this.key === empty; }; function MapIterator(map, kind) { this.head = map._head; this.i = this.head; this.kind = kind; } MapIterator.prototype = { next: function () { var i = this.i, kind = this.kind, head = this.head, result; if (typeof this.i === 'undefined') { return { value: void 0, done: true }; } while (i.isRemoved() && i !== head) { // back up off of removed entries i = i.prev; } // advance to next unreturned element. while (i.next !== head) { i = i.next; if (!i.isRemoved()) { if (kind === 'key') { result = i.key; } else if (kind === 'value') { result = i.value; } else { result = [i.key, i.value]; } this.i = i; return { value: result, done: false }; } } // once the iterator is done, it is done forever. this.i = void 0; return { value: void 0, done: true }; } }; addIterator(MapIterator.prototype); function Map(iterable) { var map = this; map = emulateES6construct(map); if (!map._es6map) { throw new TypeError('bad map'); } var head = new MapEntry(null, null); // circular doubly-linked list. head.next = head.prev = head; defineProperties(map, { _head: head, _storage: emptyObject(), _size: 0 }); // Optionally initialize map from iterable if (typeof iterable !== 'undefined' && iterable !== null) { var it = ES.GetIterator(iterable); var adder = map.set; if (!ES.IsCallable(adder)) { throw new TypeError('bad map'); } while (true) { var next = ES.IteratorNext(it); if (next.done) { break; } var nextItem = next.value; if (!ES.TypeIsObject(nextItem)) { throw new TypeError('expected iterable of pairs'); } adder.call(map, nextItem[0], nextItem[1]); } } return map; } var Map$prototype = Map.prototype; defineProperties(Map, { '@@create': function (obj) { var constructor = this; var prototype = constructor.prototype || Map$prototype; obj = obj || create(prototype); defineProperties(obj, { _es6map: true }); return obj; } }); Object.defineProperty(Map.prototype, 'size', { configurable: true, enumerable: false, get: function () { if (typeof this._size === 'undefined') { throw new TypeError('size method called on incompatible Map'); } return this._size; } }); defineProperties(Map.prototype, { get: function (key) { var fkey = fastkey(key); if (fkey !== null) { // fast O(1) path var entry = this._storage[fkey]; if (entry) { return entry.value; } else { return; } } var head = this._head, i = head; while ((i = i.next) !== head) { if (ES.SameValueZero(i.key, key)) { return i.value; } } return; }, has: function (key) { var fkey = fastkey(key); if (fkey !== null) { // fast O(1) path return typeof this._storage[fkey] !== 'undefined'; } var head = this._head, i = head; while ((i = i.next) !== head) { if (ES.SameValueZero(i.key, key)) { return true; } } return false; }, set: function (key, value) { var head = this._head, i = head, entry; var fkey = fastkey(key); if (fkey !== null) { // fast O(1) path if (typeof this._storage[fkey] !== 'undefined') { this._storage[fkey].value = value; return; } else { entry = this._storage[fkey] = new MapEntry(key, value); i = head.prev; // fall through } } while ((i = i.next) !== head) { if (ES.SameValueZero(i.key, key)) { i.value = value; return; } } entry = entry || new MapEntry(key, value); if (ES.SameValue(-0, key)) { entry.key = +0; // coerce -0 to +0 in entry } entry.next = this._head; entry.prev = this._head.prev; entry.prev.next = entry; entry.next.prev = entry; this._size += 1; return this; }, 'delete': function (key) { var head = this._head, i = head; var fkey = fastkey(key); if (fkey !== null) { // fast O(1) path if (typeof this._storage[fkey] === 'undefined') { return false; } i = this._storage[fkey].prev; delete this._storage[fkey]; // fall through } while ((i = i.next) !== head) { if (ES.SameValueZero(i.key, key)) { i.key = i.value = empty; i.prev.next = i.next; i.next.prev = i.prev; this._size -= 1; return true; } } return false; }, clear: function () { this._size = 0; this._storage = emptyObject(); var head = this._head, i = head, p = i.next; while ((i = p) !== head) { i.key = i.value = empty; p = i.next; i.next = i.prev = head; } head.next = head.prev = head; }, keys: function () { return new MapIterator(this, 'key'); }, values: function () { return new MapIterator(this, 'value'); }, entries: function () { return new MapIterator(this, 'key+value'); }, forEach: function (callback) { var context = arguments.length > 1 ? arguments[1] : null; var it = this.entries(); for (var entry = it.next(); !entry.done; entry = it.next()) { callback.call(context, entry.value[1], entry.value[0], this); } } }); addIterator(Map.prototype, function () { return this.entries(); }); return Map; })(), Set: (function () { // Creating a Map is expensive. To speed up the common case of // Sets containing only string or numeric keys, we use an object // as backing storage and lazily create a full Map only when // required. var SetShim = function Set(iterable) { var set = this; set = emulateES6construct(set); if (!set._es6set) { throw new TypeError('bad set'); } defineProperties(set, { '[[SetData]]': null, _storage: emptyObject() }); // Optionally initialize map from iterable if (typeof iterable !== 'undefined' && iterable !== null) { var it = ES.GetIterator(iterable); var adder = set.add; if (!ES.IsCallable(adder)) { throw new TypeError('bad set'); } while (true) { var next = ES.IteratorNext(it); if (next.done) { break; } var nextItem = next.value; adder.call(set, nextItem); } } return set; }; var Set$prototype = SetShim.prototype; defineProperties(SetShim, { '@@create': function (obj) { var constructor = this; var prototype = constructor.prototype || Set$prototype; obj = obj || create(prototype); defineProperties(obj, { _es6set: true }); return obj; } }); // Switch from the object backing storage to a full Map. var ensureMap = function ensureMap(set) { if (!set['[[SetData]]']) { var m = set['[[SetData]]'] = new collectionShims.Map(); Object.keys(set._storage).forEach(function (k) { // fast check for leading '$' if (k.charCodeAt(0) === 36) { k = k.slice(1); } else if (k.charAt(0) === 'n') { k = +k.slice(1); } else { k = +k; } m.set(k, k); }); set._storage = null; // free old backing storage } }; Object.defineProperty(SetShim.prototype, 'size', { configurable: true, enumerable: false, get: function () { if (typeof this._storage === 'undefined') { // https://github.com/paulmillr/es6-shim/issues/176 throw new TypeError('size method called on incompatible Set'); } ensureMap(this); return this['[[SetData]]'].size; } }); defineProperties(SetShim.prototype, { has: function (key) { var fkey; if (this._storage && (fkey = fastkey(key)) !== null) { return !!this._storage[fkey]; } ensureMap(this); return this['[[SetData]]'].has(key); }, add: function (key) { var fkey; if (this._storage && (fkey = fastkey(key)) !== null) { this._storage[fkey] = true; return; } ensureMap(this); this['[[SetData]]'].set(key, key); return this; }, 'delete': function (key) { var fkey; if (this._storage && (fkey = fastkey(key)) !== null) { var hasFKey = _hasOwnProperty.call(this._storage, fkey); return (delete this._storage[fkey]) && hasFKey; } ensureMap(this); return this['[[SetData]]']['delete'](key); }, clear: function () { if (this._storage) { this._storage = emptyObject(); return; } return this['[[SetData]]'].clear(); }, keys: function () { ensureMap(this); return this['[[SetData]]'].keys(); }, values: function () { ensureMap(this); return this['[[SetData]]'].values(); }, entries: function () { ensureMap(this); return this['[[SetData]]'].entries(); }, forEach: function (callback) { var context = arguments.length > 1 ? arguments[1] : null; var entireSet = this; ensureMap(this); this['[[SetData]]'].forEach(function (value, key) { callback.call(context, key, key, entireSet); }); } }); addIterator(SetShim.prototype, function () { return this.values(); }); return SetShim; })() }; defineProperties(globals, collectionShims); if (globals.Map || globals.Set) { /* - In Firefox < 23, Map#size is a function. - In all current Firefox, Set#entries/keys/values & Map#clear do not exist - https://bugzilla.mozilla.org/show_bug.cgi?id=869996 - In Firefox 24, Map and Set do not implement forEach - In Firefox 25 at least, Map and Set are callable without "new" */ if ( typeof globals.Map.prototype.clear !== 'function' || new globals.Set().size !== 0 || new globals.Map().size !== 0 || typeof globals.Map.prototype.keys !== 'function' || typeof globals.Set.prototype.keys !== 'function' || typeof globals.Map.prototype.forEach !== 'function' || typeof globals.Set.prototype.forEach !== 'function' || isCallableWithoutNew(globals.Map) || isCallableWithoutNew(globals.Set) || !supportsSubclassing(globals.Map, function (M) { var m = new M([]); // Firefox 32 is ok with the instantiating the subclass but will // throw when the map is used. m.set(42, 42); return m instanceof M; }) ) { globals.Map = collectionShims.Map; globals.Set = collectionShims.Set; } } // Shim incomplete iterator implementations. addIterator(Object.getPrototypeOf((new globals.Map()).keys())); addIterator(Object.getPrototypeOf((new globals.Set()).keys())); } return globals; }));