2 ##### 2.4.1 - 2016.07.18
3 - fixed `script` tag for some parsers, [#204](https://github.com/zloirock/core-js/issues/204), [#216](https://github.com/zloirock/core-js/issues/216)
4 - removed some unused variables, [#217](https://github.com/zloirock/core-js/issues/217), [#218](https://github.com/zloirock/core-js/issues/218)
5 - fixed MS Edge `Reflect.construct` and `Reflect.apply` - they should not allow primitive as `argumentsList` argument
7 ##### 1.2.7 [LEGACY] - 2016.07.18
8 - some fixes for issues like [#159](https://github.com/zloirock/core-js/issues/159), [#186](https://github.com/zloirock/core-js/issues/186), [#194](https://github.com/zloirock/core-js/issues/194), [#207](https://github.com/zloirock/core-js/issues/207)
10 ##### 2.4.0 - 2016.05.08
11 - Added `Observable`, [stage 1 proposal](https://github.com/zenparsing/es-observable)
12 - Fixed behavior `Object.{getOwnPropertySymbols, getOwnPropertyDescriptor}` and `Object#propertyIsEnumerable` on `Object.prototype`
13 - `Reflect.construct` and `Reflect.apply` should throw an error if `argumentsList` argument is not an object, [#194](https://github.com/zloirock/core-js/issues/194)
15 ##### 2.3.0 - 2016.04.24
16 - Added `asap` for enqueuing microtasks, [stage 0 proposal](https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-09/sept-25.md#510-globalasap-for-enqueuing-a-microtask)
17 - Added well-known symbol `Symbol.asyncIterator` for [stage 2 async iteration proposal](https://github.com/tc39/proposal-async-iteration)
18 - Added well-known symbol `Symbol.observable` for [stage 1 observables proposal](https://github.com/zenparsing/es-observable)
19 - `String#{padStart, padEnd}` returns original string if filler is empty string, [TC39 meeting notes](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-03/march-29.md#stringprototypepadstartpadend)
20 - `Object.values` and `Object.entries` moved to stage 4 from 3, [TC39 meeting notes](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-03/march-29.md#objectvalues--objectentries)
21 - `System.global` moved to stage 2 from 1, [TC39 meeting notes](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-03/march-29.md#systemglobal)
22 - `Map#toJSON` and `Set#toJSON` rejected and will be removed from the next major release, [TC39 meeting notes](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-03/march-31.md#mapprototypetojsonsetprototypetojson)
23 - `Error.isError` withdrawn and will be removed from the next major release, [TC39 meeting notes](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-03/march-29.md#erroriserror)
24 - Added fallback for `Function#name` on non-extensible functions and functions with broken `toString` conversion, [#193](https://github.com/zloirock/core-js/issues/193)
26 ##### 2.2.2 - 2016.04.06
27 - Added conversion `-0` to `+0` to `Array#{indexOf, lastIndexOf}`, [ES2016 fix](https://github.com/tc39/ecma262/pull/316)
28 - Added fixes for some `Math` methods in Tor Browser
29 - `Array.{from, of}` no longer calls prototype setters
30 - Added workaround over Chrome DevTools strange behavior, [#186](https://github.com/zloirock/core-js/issues/186)
32 ##### 2.2.1 - 2016.03.19
33 - Fixed `Object.getOwnPropertyNames(window)` `2.1+` versions bug, [#181](https://github.com/zloirock/core-js/issues/181)
35 ##### 2.2.0 - 2016.03.15
36 - Added `String#matchAll`, [proposal](https://github.com/tc39/String.prototype.matchAll)
37 - Added `Object#__(define|lookup)[GS]etter__`, [annex B ES2017](https://github.com/tc39/ecma262/pull/381)
38 - Added `@@toPrimitive` methods to `Date` and `Symbol`
39 - Fixed `%TypedArray%#slice` in Edge ~ 13 (throws with `@@species` and wrapped / inherited constructor)
40 - Some other minor fixes
42 ##### 2.1.5 - 2016.03.12
43 - Improved support NodeJS domains in `Promise#then`, [#180](https://github.com/zloirock/core-js/issues/180)
44 - Added fallback for `Date#toJSON` bug in Qt Script, [#173](https://github.com/zloirock/core-js/issues/173#issuecomment-193972502)
46 ##### 2.1.4 - 2016.03.08
47 - Added fallback for `Symbol` polyfill in Qt Script, [#173](https://github.com/zloirock/core-js/issues/173)
48 - Added one more fallback for IE11 `Script Access Denied` error with iframes, [#165](https://github.com/zloirock/core-js/issues/165)
50 ##### 2.1.3 - 2016.02.29
51 - Added fallback for [`es6-promise` package bug](https://github.com/stefanpenner/es6-promise/issues/169), [#176](https://github.com/zloirock/core-js/issues/176)
53 ##### 2.1.2 - 2016.02.29
54 - Some minor `Promise` fixes:
55 - Browsers `rejectionhandled` event better HTML spec complaint
56 - Errors in unhandled rejection handlers should not cause any problems
57 - Fixed typo in feature detection
59 ##### 2.1.1 - 2016.02.22
60 - Some `Promise` improvements:
62 - **Added detection unhandled rejection tracking support - now it's available everywhere**, [#140](https://github.com/zloirock/core-js/issues/140)
63 - Added detection `@@species` pattern support for completely correct subclassing
64 - Removed usage `Object.setPrototypeOf` from feature detection and noisy console message about it in FF
65 - `Promise.all` fixed for some very specific cases
67 ##### 2.1.0 - 2016.02.09
69 - ES5 polyfills are split and logic, used in other polyfills, moved to internal modules
70 - **All entry point works in ES3 environment like IE8- without `core-js/(library/)es5`**
71 - **Added all missed single entry points for ES5 polyfills**
72 - Separated ES5 polyfills moved to the ES6 namespace. Why?
73 - Mainly, for prevent duplication features in different namespaces - logic of most required ES5 polyfills changed in ES6+:
74 - Already added changes for: `Object` statics - should accept primitives, new whitespaces lists in `String#trim`, `parse(Int|float)`, `RegExp#toString` logic, `String#split`, etc
75 - Should be changed in the future: `@@species` and `ToLength` logic in `Array` methods, `Date` parsing, `Function#bind`, etc
76 - Should not be changed only several features like `Array.isArray` and `Date.now`
77 - Some ES5 polyfills required for modern engines
78 - All old entry points should work fine, but in the next major release API can be changed
79 - `Object.getOwnPropertyDescriptors` moved to the stage 3, [January TC39 meeting](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-01/2016-01-28.md#objectgetownpropertydescriptors-to-stage-3-jordan-harband-low-priority-but-super-quick)
80 - Added `umd` option for [custom build process](https://github.com/zloirock/core-js#custom-build-from-external-scripts), [#169](https://github.com/zloirock/core-js/issues/169)
81 - Returned entry points for `Array` statics, removed in `2.0`, for compatibility with `babel` `6` and for future fixes
83 - `Reflect.enumerate` deprecated and will be removed from the next major release, [January TC39 meeting](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-01/2016-01-28.md#5xix-revisit-proxy-enumerate---revisit-decision-to-exhaust-iterator)
85 - Added [`Reflect` metadata API](https://github.com/jonathandturner/decorators/blob/master/specs/metadata.md) as a pre-strawman feature, [#152](https://github.com/zloirock/core-js/issues/152):
86 - `Reflect.defineMetadata`
87 - `Reflect.deleteMetadata`
88 - `Reflect.getMetadata`
89 - `Reflect.getMetadataKeys`
90 - `Reflect.getOwnMetadata`
91 - `Reflect.getOwnMetadataKeys`
92 - `Reflect.hasMetadata`
93 - `Reflect.hasOwnMetadata`
95 - Implementation / fixes `Date#toJSON`
96 - Fixes for `parseInt` and `Number.parseInt`
97 - Fixes for `parseFloat` and `Number.parseFloat`
98 - Fixes for `RegExp#toString`
99 - Fixes for `Array#sort`
100 - Fixes for `Number#toFixed`
101 - Fixes for `Number#toPrecision`
102 - Additional fixes for `String#split` (`RegExp#@@split`)
104 - Correct subclassing wrapped collections, `Number` and `RegExp` constructors with native class syntax
105 - Correct support `SharedArrayBuffer` and buffers from other realms in typed arrays wrappers
106 - Additional validations for `Object.{defineProperty, getOwnPropertyDescriptor}` and `Reflect.defineProperty`
108 - Fixed some cases `Array#lastIndexOf` with negative second argument
110 ##### 2.0.3 - 2016.01.11
111 - Added fallback for V8 ~ Chrome 49 `Promise` subclassing bug causes unhandled rejection on feature detection, [#159](https://github.com/zloirock/core-js/issues/159)
112 - Added fix for very specific environments with global `window === null`
114 ##### 2.0.2 - 2016.01.04
115 - Temporarily removed `length` validation from `Uint8Array` constructor wrapper. Reason - [bug in `ws` module](https://github.com/websockets/ws/pull/645) (-> `socket.io`) which passes to `Buffer` constructor -> `Uint8Array` float and uses [the `V8` bug](https://code.google.com/p/v8/issues/detail?id=4552) for conversion to int (by the spec should be thrown an error). [It creates problems for many people.](https://github.com/karma-runner/karma/issues/1768) I hope, it will be returned after fixing this bug in `V8`.
117 ##### 2.0.1 - 2015.12.31
118 - forced usage `Promise.resolve` polyfill in the `library` version for correct work with wrapper
119 - `Object.assign` should be defined in the strict mode -> throw an error on extension non-extensible objects, [#154](https://github.com/zloirock/core-js/issues/154)
121 ##### 2.0.0 - 2015.12.24
122 - added implementations and fixes [Typed Arrays](https://github.com/zloirock/core-js#ecmascript-6-typed-arrays)-related features
123 - `ArrayBuffer`, `ArrayBuffer.isView`, `ArrayBuffer#slice`
124 - `DataView` with all getter / setter methods
125 - `Int8Array`, `Uint8Array`, `Uint8ClampedArray`, `Int16Array`, `Uint16Array`, `Int32Array`, `Uint32Array`, `Float32Array` and `Float64Array` constructors
126 - `%TypedArray%.{for, of}`, `%TypedArray%#{copyWithin, every, fill, filter, find, findIndex, forEach, indexOf, includes, join, lastIndexOf, map, reduce, reduceRight, reverse, set, slice, some, sort, subarray, values, keys, entries, @@iterator, ...}`
127 - added [`System.global`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://github.com/tc39/proposal-global), [November TC39 meeting](https://github.com/rwaldron/tc39-notes/tree/master/es7/2015-11/nov-19.md#systemglobal-jhd)
128 - added [`Error.isError`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://github.com/ljharb/proposal-is-error), [November TC39 meeting](https://github.com/rwaldron/tc39-notes/tree/master/es7/2015-11/nov-19.md#jhd-erroriserror)
129 - added [`Math.{iaddh, isubh, imulh, umulh}`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://gist.github.com/BrendanEich/4294d5c212a6d2254703)
130 - `RegExp.escape` moved from the `es7` to the non-standard `core` namespace, [July TC39 meeting](https://github.com/rwaldron/tc39-notes/blob/master/es7/2015-07/july-28.md#62-regexpescape) - too slow, but it's condition of stability, [#116](https://github.com/zloirock/core-js/issues/116)
131 - [`Promise`](https://github.com/zloirock/core-js#ecmascript-6-promise)
132 - some performance optimisations
133 - added basic support [`rejectionHandled` event / `onrejectionhandled` handler](https://github.com/zloirock/core-js#unhandled-rejection-tracking) to the polyfill
134 - removed usage `@@species` from `Promise.{all, race}`, [November TC39 meeting](https://github.com/rwaldron/tc39-notes/tree/master/es7/2015-11/nov-18.md#conclusionresolution-2)
135 - some improvements [collections polyfills](https://github.com/zloirock/core-js#ecmascript-6-collections)
136 - `O(1)` and preventing possible leaks with frozen keys, [#134](https://github.com/zloirock/core-js/issues/134)
137 - correct observable state object keys
138 - renamed `String#{padLeft, padRight}` -> [`String#{padStart, padEnd}`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://github.com/tc39/proposal-string-pad-start-end), [November TC39 meeting](https://github.com/rwaldron/tc39-notes/tree/master/es7/2015-11/nov-17.md#conclusionresolution-2) (they want to rename it on each meeting?O_o), [#132](https://github.com/zloirock/core-js/issues/132)
139 - added [`String#{trimStart, trimEnd}` as aliases for `String#{trimLeft, trimRight}`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://github.com/sebmarkbage/ecmascript-string-left-right-trim), [November TC39 meeting](https://github.com/rwaldron/tc39-notes/tree/master/es7/2015-11/nov-17.md#conclusionresolution-2)
140 - added [annex B HTML methods](https://github.com/zloirock/core-js#ecmascript-6-string) - ugly, but also [the part of the spec](http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype.anchor)
141 - added little fix for [`Date#toString`](https://github.com/zloirock/core-js#ecmascript-6-date) - `new Date(NaN).toString()` [should be `'Invalid Date'`](http://www.ecma-international.org/ecma-262/6.0/#sec-todatestring)
142 - added [`{keys, values, entries, @@iterator}` methods to DOM collections](https://github.com/zloirock/core-js#iterable-dom-collections) which should have [iterable interface](https://heycam.github.io/webidl/#idl-iterable) or should be [inherited from `Array`](https://heycam.github.io/webidl/#LegacyArrayClass) - `NodeList`, `DOMTokenList`, `MediaList`, `StyleSheetList`, `CSSRuleList`.
143 - removed Mozilla `Array` generics - [deprecated and will be removed from FF](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Array_generic_methods), [looks like strawman is dead](http://wiki.ecmascript.org/doku.php?id=strawman:array_statics), available [alternative shim](https://github.com/plusdude/array-generics)
144 - removed `core.log` module
146 - added entry points for [virtual methods](https://github.com/zloirock/core-js#commonjs-and-prototype-methods-without-global-namespace-pollution)
147 - added entry points for [stages proposals](https://github.com/zloirock/core-js#ecmascript-7-proposals)
148 - some other minor changes
149 - [custom build from external scripts](https://github.com/zloirock/core-js#custom-build-from-external-scripts) moved to the separate package for preventing problems with dependencies
150 - changed `$` prefix for internal modules file names because Team Foundation Server does not support it, [#129](https://github.com/zloirock/core-js/issues/129)
151 - additional fix for `SameValueZero` in V8 ~ Chromium 39-42 collections
152 - additional fix for FF27 `Array` iterator
153 - removed usage shortcuts for `arguments` object - old WebKit bug, [#150](https://github.com/zloirock/core-js/issues/150)
154 - `{Map, Set}#forEach` non-generic, [#144](https://github.com/zloirock/core-js/issues/144)
155 - many other improvements
157 ##### 1.2.6 - 2015.11.09
158 * reject with `TypeError` on attempt resolve promise itself
159 * correct behavior with broken `Promise` subclass constructors / methods
160 * added `Promise`-based fallback for microtask
161 * fixed V8 and FF `Array#{values, @@iterator}.name`
162 * fixed IE7- `[1, 2].join(undefined) -> '1,2'`
163 * some other fixes / improvements / optimizations
165 ##### 1.2.5 - 2015.11.02
166 * some more `Number` constructor fixes:
167 * fixed V8 ~ Node 0.8 bug: `Number('+0x1')` should be `NaN`
168 * fixed `Number(' 0b1\n')` case, should be `1`
169 * fixed `Number()` case, should be `0`
171 ##### 1.2.4 - 2015.11.01
172 * fixed `Number('0b12') -> NaN` case in the shim
173 * fixed V8 ~ Chromium 40- bug - `Weak(Map|Set)#{delete, get, has}` should not throw errors [#124](https://github.com/zloirock/core-js/issues/124)
174 * some other fixes and optimizations
176 ##### 1.2.3 - 2015.10.23
177 * fixed some problems related old V8 bug `Object('a').propertyIsEnumerable(0) // => false`, for example, `Object.assign({}, 'qwe')` from the last release
178 * fixed `.name` property and `Function#toString` conversion some polyfilled methods
179 * fixed `Math.imul` arity in Safari 8-
181 ##### 1.2.2 - 2015.10.18
182 * improved optimisations for V8
183 * fixed build process from external packages, [#120](https://github.com/zloirock/core-js/pull/120)
184 * one more `Object.{assign, values, entries}` fix for [**very** specific case](https://github.com/ljharb/proposal-object-values-entries/issues/5)
186 ##### 1.2.1 - 2015.10.02
187 * replaced fix `JSON.stringify` + `Symbol` behavior from `.toJSON` method to wrapping `JSON.stringify` - little more correct, [compat-table/642](https://github.com/kangax/compat-table/pull/642)
188 * fixed typo which broke tasks scheduler in WebWorkers in old FF, [#114](https://github.com/zloirock/core-js/pull/114)
190 ##### 1.2.0 - 2015.09.27
191 * added browser [`Promise` rejection hook](#unhandled-rejection-tracking), [#106](https://github.com/zloirock/core-js/issues/106)
192 * added correct [`IsRegExp`](http://www.ecma-international.org/ecma-262/6.0/#sec-isregexp) logic to [`String#{includes, startsWith, endsWith}`](https://github.com/zloirock/core-js/#ecmascript-6-string) and [`RegExp` constructor](https://github.com/zloirock/core-js/#ecmascript-6-regexp), `@@match` case, [example](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/match#Disabling_the_isRegExp_check)
193 * updated [`String#leftPad`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) [with proposal](https://github.com/ljharb/proposal-string-pad-left-right/issues/6): string filler truncated from the right side
194 * replaced V8 [`Object.assign`](https://github.com/zloirock/core-js/#ecmascript-6-object) - its properties order not only [incorrect](https://github.com/sindresorhus/object-assign/issues/22), it is non-deterministic and it causes some problems
195 * fixed behavior with deleted in getters properties for `Object.{`[`assign`](https://github.com/zloirock/core-js/#ecmascript-6-object)`, `[`entries, values`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)`}`, [example](http://goo.gl/iQE01c)
196 * fixed [`Math.sinh`](https://github.com/zloirock/core-js/#ecmascript-6-math) with very small numbers in V8 near Chromium 38
197 * some other fixes and optimizations
199 ##### 1.1.4 - 2015.09.05
200 * fixed support symbols in FF34-35 [`Object.assign`](https://github.com/zloirock/core-js/#ecmascript-6-object)
201 * fixed [collections iterators](https://github.com/zloirock/core-js/#ecmascript-6-iterators) in FF25-26
202 * fixed non-generic WebKit [`Array.of`](https://github.com/zloirock/core-js/#ecmascript-6-array)
203 * some other fixes and optimizations
205 ##### 1.1.3 - 2015.08.29
206 * fixed support Node.js domains in [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise), [#103](https://github.com/zloirock/core-js/issues/103)
208 ##### 1.1.2 - 2015.08.28
209 * added `toJSON` method to [`Symbol`](https://github.com/zloirock/core-js/#ecmascript-6-symbol) polyfill and to MS Edge implementation for expected `JSON.stringify` result w/o patching this method
210 * replaced [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) implementations w/o correct support third argument
211 * fixed `global` detection with changed `document.domain` in ~IE8, [#100](https://github.com/zloirock/core-js/issues/100)
213 ##### 1.1.1 - 2015.08.20
214 * added more correct microtask implementation for [`Promise`](#ecmascript-6-promise)
216 ##### 1.1.0 - 2015.08.17
217 * updated [string padding](https://github.com/zloirock/core-js/#ecmascript-7-proposals) to [actual proposal](https://github.com/ljharb/proposal-string-pad-left-right) - renamed, minor internal changes:
218 * `String#lpad` -> `String#padLeft`
219 * `String#rpad` -> `String#padRight`
220 * added [string trim functions](#ecmascript-7-proposals) - [proposal](https://github.com/sebmarkbage/ecmascript-string-left-right-trim), defacto standard - required only for IE11- and fixed for some old engines:
223 * [`String#trim`](https://github.com/zloirock/core-js/#ecmascript-6-string) fixed for some engines by es6 spec and moved from `es5` to single `es6` module
224 * splitted [`es6.object.statics-accept-primitives`](https://github.com/zloirock/core-js/#ecmascript-6-object)
225 * caps for `freeze`-family `Object` methods moved from `es5` to `es6` namespace and joined with [es6 wrappers](https://github.com/zloirock/core-js/#ecmascript-6-object)
226 * `es5` [namespace](https://github.com/zloirock/core-js/#commonjs) also includes modules, moved to `es6` namespace - you can use it as before
227 * increased `MessageChannel` priority in `$.task`, [#95](https://github.com/zloirock/core-js/issues/95)
228 * does not get `global.Symbol` on each getting iterator, if you wanna use alternative `Symbol` shim - add it before `core-js`
229 * [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) optimized and fixed for some cases
230 * simplified [`Reflect.enumerate`](https://github.com/zloirock/core-js/#ecmascript-6-reflect), see [this question](https://esdiscuss.org/topic/question-about-enumerate-and-property-decision-timing)
231 * some corrections in [`Math.acosh`](https://github.com/zloirock/core-js/#ecmascript-6-math)
232 * fixed [`Math.imul`](https://github.com/zloirock/core-js/#ecmascript-6-math) for old WebKit
233 * some fixes in string / RegExp [well-known symbols](https://github.com/zloirock/core-js/#ecmascript-6-regexp) logic
234 * some other fixes and optimizations
236 ##### 1.0.1 - 2015.07.31
237 * some fixes for final MS Edge, replaced broken native `Reflect.defineProperty`
238 * some minor fixes and optimizations
239 * changed compression `client/*.min.js` options for safe `Function#name` and `Function#length`, should be fixed [#92](https://github.com/zloirock/core-js/issues/92)
241 ##### 1.0.0 - 2015.07.22
242 * added logic for [well-known symbols](https://github.com/zloirock/core-js/#ecmascript-6-regexp):
247 * actualized and optimized work with iterables:
248 * optimized [`Map`, `Set`, `WeakMap`, `WeakSet` constructors](https://github.com/zloirock/core-js/#ecmascript-6-collections), [`Promise.all`, `Promise.race`](https://github.com/zloirock/core-js/#ecmascript-6-promise) for default `Array Iterator`
249 * optimized [`Array.from`](https://github.com/zloirock/core-js/#ecmascript-6-array) for default `Array Iterator`
250 * added [`core.getIteratorMethod`](https://github.com/zloirock/core-js/#ecmascript-6-iterators) helper
251 * uses enumerable properties in shimmed instances - collections, iterators, etc for optimize performance
252 * added support native constructors to [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) with 2 arguments
253 * added support native constructors to [`Function#bind`](https://github.com/zloirock/core-js/#ecmascript-5) shim with `new`
254 * removed obsolete `.clear` methods native [`Weak`-collections](https://github.com/zloirock/core-js/#ecmascript-6-collections)
255 * maximum modularity, reduced minimal custom build size, separated into submodules:
256 * [`es6.reflect`](https://github.com/zloirock/core-js/#ecmascript-6-reflect)
257 * [`es6.regexp`](https://github.com/zloirock/core-js/#ecmascript-6-regexp)
258 * [`es6.math`](https://github.com/zloirock/core-js/#ecmascript-6-math)
259 * [`es6.number`](https://github.com/zloirock/core-js/#ecmascript-6-number)
260 * [`es7.object.to-array`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
261 * [`core.object`](https://github.com/zloirock/core-js/#object)
262 * [`core.string`](https://github.com/zloirock/core-js/#escaping-strings)
263 * [`core.iter-helpers`](https://github.com/zloirock/core-js/#ecmascript-6-iterators)
264 * internal modules (`$`, `$.iter`, etc)
265 * many other optimizations
266 * final cleaning non-standard features
267 * moved `$for` to [separate library](https://github.com/zloirock/forof). This work for syntax - `for-of` loop and comprehensions
268 * moved `Date#{format, formatUTC}` to [separate library](https://github.com/zloirock/dtf). Standard way for this - `ECMA-402`
269 * removed `Math` methods from `Number.prototype`. Slight sugar for simple `Math` methods calling
270 * removed `{Array#, Array, Dict}.turn`
271 * removed `core.global`
272 * uses `ToNumber` instead of `ToLength` in [`Number Iterator`](https://github.com/zloirock/core-js/#number-iterator), `Array.from(2.5)` will be `[0, 1, 2]` instead of `[0, 1]`
273 * fixed [#85](https://github.com/zloirock/core-js/issues/85) - invalid `Promise` unhandled rejection message in nested `setTimeout`
274 * fixed [#86](https://github.com/zloirock/core-js/issues/86) - support FF extensions
275 * fixed [#89](https://github.com/zloirock/core-js/issues/89) - behavior `Number` constructor in strange case
277 ##### 0.9.18 - 2015.06.17
278 * removed `/` from [`RegExp.escape`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) escaped characters
280 ##### 0.9.17 - 2015.06.14
281 * updated [`RegExp.escape`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) to the [latest proposal](https://github.com/benjamingr/RexExp.escape)
282 * fixed conflict with webpack dev server + IE buggy behavior
284 ##### 0.9.16 - 2015.06.11
285 * more correct order resolving thenable in [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) polyfill
286 * uses polyfill instead of [buggy V8 `Promise`](https://github.com/zloirock/core-js/issues/78)
288 ##### 0.9.15 - 2015.06.09
289 * [collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) from `library` version return wrapped native instances
290 * fixed collections prototype methods in `library` version
291 * optimized [`Math.hypot`](https://github.com/zloirock/core-js/#ecmascript-6-math)
293 ##### 0.9.14 - 2015.06.04
294 * updated [`Promise.resolve` behavior](https://esdiscuss.org/topic/fixing-promise-resolve)
295 * added fallback for IE11 buggy `Object.getOwnPropertyNames` + iframe
298 ##### 0.9.13 - 2015.05.25
299 * added fallback for [`Symbol` polyfill](https://github.com/zloirock/core-js/#ecmascript-6-symbol) for old Android
302 ##### 0.9.12 - 2015.05.24
303 * different instances `core-js` should use / recognize the same symbols
306 ##### 0.9.11 - 2015.05.18
307 * simplified [custom build](https://github.com/zloirock/core-js/#custom-build)
308 * add custom build js api
309 * added `grunt-cli` to `devDependencies` for `npm run grunt`
312 ##### 0.9.10 - 2015.05.16
313 * wrapped `Function#toString` for correct work wrapped methods / constructors with methods similar to the [`lodash` `isNative`](https://github.com/lodash/lodash/issues/1197)
314 * added proto versions of methods to export object in `default` version for consistency with `library` version
316 ##### 0.9.9 - 2015.05.14
317 * wrapped `Object#propertyIsEnumerable` for [`Symbol` polyfill](https://github.com/zloirock/core-js/#ecmascript-6-symbol)
318 * [added proto versions of methods to `library` for ES7 bind syntax](https://github.com/zloirock/core-js/issues/65)
321 ##### 0.9.8 - 2015.05.12
322 * fixed [`Math.hypot`](https://github.com/zloirock/core-js/#ecmascript-6-math) with negative arguments
323 * added `Object#toString.toString` as fallback for [`lodash` `isNative`](https://github.com/lodash/lodash/issues/1197)
325 ##### 0.9.7 - 2015.05.07
326 * added [support DOM collections](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice#Streamlining_cross-browser_behavior) to IE8- `Array#slice`
328 ##### 0.9.6 - 2015.05.01
329 * added [`String#lpad`, `String#rpad`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
331 ##### 0.9.5 - 2015.04.30
332 * added cap for `Function#@@hasInstance`
333 * some fixes and optimizations
335 ##### 0.9.4 - 2015.04.27
336 * fixed `RegExp` constructor
338 ##### 0.9.3 - 2015.04.26
339 * some fixes and optimizations
341 ##### 0.9.2 - 2015.04.25
342 * more correct [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) unhandled rejection tracking and resolving / rejection priority
344 ##### 0.9.1 - 2015.04.25
345 * fixed `__proto__`-based [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) subclassing in some environments
347 ##### 0.9.0 - 2015.04.24
348 * added correct [symbols](https://github.com/zloirock/core-js/#ecmascript-6-symbol) descriptors
349 * fixed behavior `Object.{assign, create, defineProperty, defineProperties, getOwnPropertyDescriptor, getOwnPropertyDescriptors}` with symbols
350 * added [single entry points](https://github.com/zloirock/core-js/#commonjs) for `Object.{create, defineProperty, defineProperties}`
351 * added [`Map#toJSON`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
352 * removed non-standard methods `Object#[_]` and `Function#only` - they solves syntax problems, but now in compilers available arrows and ~~in near future will be available~~ [available](http://babeljs.io/blog/2015/05/14/function-bind/) [bind syntax](https://github.com/zenparsing/es-function-bind)
353 * removed non-standard undocumented methods `Symbol.{pure, set}`
354 * some fixes and internal changes
356 ##### 0.8.4 - 2015.04.18
357 * uses `webpack` instead of `browserify` for browser builds - more compression-friendly result
359 ##### 0.8.3 - 2015.04.14
360 * fixed `Array` statics with single entry points
362 ##### 0.8.2 - 2015.04.13
363 * [`Math.fround`](https://github.com/zloirock/core-js/#ecmascript-6-math) now also works in IE9-
364 * added [`Set#toJSON`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
365 * some optimizations and fixes
367 ##### 0.8.1 - 2015.04.03
368 * fixed `Symbol.keyFor`
370 ##### 0.8.0 - 2015.04.02
371 * changed [CommonJS API](https://github.com/zloirock/core-js/#commonjs)
372 * splitted and renamed some modules
373 * added support ES3 environment (ES5 polyfill) to **all** default versions - size increases slightly (+ ~4kb w/o gzip), many issues disappear, if you don't need it - [simply include only required namespaces / features / modules](https://github.com/zloirock/core-js/#commonjs)
374 * removed [abstract references](https://github.com/zenparsing/es-abstract-refs) support - proposal has been superseded =\
375 * [`$for.isIterable` -> `core.isIterable`, `$for.getIterator` -> `core.getIterator`](https://github.com/zloirock/core-js/#ecmascript-6-iterators), temporary available in old namespace
376 * fixed iterators support in v8 `Promise.all` and `Promise.race`
379 ##### 0.7.2 - 2015.03.09
382 ##### 0.7.1 - 2015.03.07
385 ##### 0.7.0 - 2015.03.06
386 * rewritten and splitted into [CommonJS modules](https://github.com/zloirock/core-js/#commonjs)
388 ##### 0.6.1 - 2015.02.24
389 * fixed support [`Object.defineProperty`](https://github.com/zloirock/core-js/#ecmascript-5) with accessors on DOM elements on IE8
391 ##### 0.6.0 - 2015.02.23
392 * added support safe closing iteration - calling `iterator.return` on abort iteration, if it exists
393 * added basic support [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) unhandled rejection tracking in shim
394 * added [`Object.getOwnPropertyDescriptors`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
395 * removed `console` cap - creates too many problems
396 * restructuring [namespaces](https://github.com/zloirock/core-js/#custom-build)
399 ##### 0.5.4 - 2015.02.15
402 ##### 0.5.3 - 2015.02.14
403 * added [support binary and octal literals](https://github.com/zloirock/core-js/#ecmascript-6-number) to `Number` constructor
404 * added [`Date#toISOString`](https://github.com/zloirock/core-js/#ecmascript-5)
406 ##### 0.5.2 - 2015.02.10
409 ##### 0.5.1 - 2015.02.09
412 ##### 0.5.0 - 2015.02.08
413 * systematization of modules
414 * splitted [`es6` module](https://github.com/zloirock/core-js/#ecmascript-6)
415 * splitted `console` module: `web.console` - only cap for missing methods, `core.log` - bound methods & additional features
416 * added [`delay` method](https://github.com/zloirock/core-js/#delay)
419 ##### 0.4.10 - 2015.01.28
420 * [`Object.getOwnPropertySymbols`](https://github.com/zloirock/core-js/#ecmascript-6-symbol) polyfill returns array of wrapped keys
422 ##### 0.4.9 - 2015.01.27
425 ##### 0.4.8 - 2015.01.25
426 * some [collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) fixes
428 ##### 0.4.7 - 2015.01.25
429 * added support frozen objects as [collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) keys
431 ##### 0.4.6 - 2015.01.21
432 * added [`Object.getOwnPropertySymbols`](https://github.com/zloirock/core-js/#ecmascript-6-symbol)
433 * added [`NodeList.prototype[@@iterator]`](https://github.com/zloirock/core-js/#ecmascript-6-iterators)
434 * added basic `@@species` logic - getter in native constructors
435 * removed `Function#by`
438 ##### 0.4.5 - 2015.01.16
441 ##### 0.4.4 - 2015.01.11
442 * enabled CSP support
444 ##### 0.4.3 - 2015.01.10
445 * added `Function` instances `name` property for IE9+
447 ##### 0.4.2 - 2015.01.10
448 * `Object` static methods accept primitives
449 * `RegExp` constructor can alter flags (IE9+)
450 * added `Array.prototype[Symbol.unscopables]`
452 ##### 0.4.1 - 2015.01.05
455 ##### 0.4.0 - 2015.01.03
456 * added [`es6.reflect`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) module:
457 * added `Reflect.apply`
458 * added `Reflect.construct`
459 * added `Reflect.defineProperty`
460 * added `Reflect.deleteProperty`
461 * added `Reflect.enumerate`
462 * added `Reflect.get`
463 * added `Reflect.getOwnPropertyDescriptor`
464 * added `Reflect.getPrototypeOf`
465 * added `Reflect.has`
466 * added `Reflect.isExtensible`
467 * added `Reflect.preventExtensions`
468 * added `Reflect.set`
469 * added `Reflect.setPrototypeOf`
470 * `core-js` methods now can use external `Symbol.iterator` polyfill
473 ##### 0.3.3 - 2014.12.28
474 * [console cap](https://github.com/zloirock/core-js/#console) excluded from node.js default builds
476 ##### 0.3.2 - 2014.12.25
477 * added cap for [ES5](https://github.com/zloirock/core-js/#ecmascript-5) freeze-family methods
478 * fixed `console` bug
480 ##### 0.3.1 - 2014.12.23
483 ##### 0.3.0 - 2014.12.23
484 * Optimize [`Map` & `Set`](https://github.com/zloirock/core-js/#ecmascript-6-collections):
485 * use entries chain on hash table
486 * fast & correct iteration
487 * iterators moved to [`es6`](https://github.com/zloirock/core-js/#ecmascript-6) and [`es6.collections`](https://github.com/zloirock/core-js/#ecmascript-6-collections) modules
489 ##### 0.2.5 - 2014.12.20
490 * `console` no longer shortcut for `console.log` (compatibility problems)
493 ##### 0.2.4 - 2014.12.17
494 * better compliance of ES6
495 * added [`Math.fround`](https://github.com/zloirock/core-js/#ecmascript-6-math) (IE10+)
498 ##### 0.2.3 - 2014.12.15
499 * [Symbols](https://github.com/zloirock/core-js/#ecmascript-6-symbol):
500 * added option to disable addition setter to `Object.prototype` for Symbol polyfill:
501 * added `Symbol.useSimple`
502 * added `Symbol.useSetter`
503 * added cap for well-known Symbols:
504 * added `Symbol.hasInstance`
505 * added `Symbol.isConcatSpreadable`
506 * added `Symbol.match`
507 * added `Symbol.replace`
508 * added `Symbol.search`
509 * added `Symbol.species`
510 * added `Symbol.split`
511 * added `Symbol.toPrimitive`
512 * added `Symbol.unscopables`
514 ##### 0.2.2 - 2014.12.13
515 * added [`RegExp#flags`](https://github.com/zloirock/core-js/#ecmascript-6-regexp) ([December 2014 Draft Rev 29](http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#december_6_2014_draft_rev_29))
516 * added [`String.raw`](https://github.com/zloirock/core-js/#ecmascript-6-string)
518 ##### 0.2.1 - 2014.12.12
519 * repair converting -0 to +0 in [native collections](https://github.com/zloirock/core-js/#ecmascript-6-collections)
521 ##### 0.2.0 - 2014.12.06
522 * added [`es7.proposals`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) and [`es7.abstract-refs`](https://github.com/zenparsing/es-abstract-refs) modules
523 * added [`String#at`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
524 * added real [`String Iterator`](https://github.com/zloirock/core-js/#ecmascript-6-iterators), older versions used Array Iterator
525 * added abstract references support:
526 * added `Symbol.referenceGet`
527 * added `Symbol.referenceSet`
528 * added `Symbol.referenceDelete`
529 * added `Function#@@referenceGet`
530 * added `Map#@@referenceGet`
531 * added `Map#@@referenceSet`
532 * added `Map#@@referenceDelete`
533 * added `WeakMap#@@referenceGet`
534 * added `WeakMap#@@referenceSet`
535 * added `WeakMap#@@referenceDelete`
536 * added `Dict.{...methods}[@@referenceGet]`
537 * removed deprecated `.contains` methods
540 ##### 0.1.5 - 2014.12.01
541 * added [`Array#copyWithin`](https://github.com/zloirock/core-js/#ecmascript-6-array)
542 * added [`String#codePointAt`](https://github.com/zloirock/core-js/#ecmascript-6-string)
543 * added [`String.fromCodePoint`](https://github.com/zloirock/core-js/#ecmascript-6-string)
545 ##### 0.1.4 - 2014.11.27
546 * added [`Dict.mapPairs`](https://github.com/zloirock/core-js/#dict)
548 ##### 0.1.3 - 2014.11.20
549 * [TC39 November meeting](https://github.com/rwaldron/tc39-notes/tree/master/es6/2014-11):
550 * [`.contains` -> `.includes`](https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-11/nov-18.md#51--44-arrayprototypecontains-and-stringprototypecontains)
551 * `String#contains` -> [`String#includes`](https://github.com/zloirock/core-js/#ecmascript-6-string)
552 * `Array#contains` -> [`Array#includes`](https://github.com/zloirock/core-js/#ecmascript-7-proposals)
553 * `Dict.contains` -> [`Dict.includes`](https://github.com/zloirock/core-js/#dict)
554 * [removed `WeakMap#clear`](https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-11/nov-19.md#412-should-weakmapweakset-have-a-clear-method-markm)
555 * [removed `WeakSet#clear`](https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-11/nov-19.md#412-should-weakmapweakset-have-a-clear-method-markm)
557 ##### 0.1.2 - 2014.11.19
558 * `Map` & `Set` bug fix
560 ##### 0.1.1 - 2014.11.18
projects / yaffs-website / blob