## Changelog ##### 2.6.7 [LEGACY] - 2019.05.21 - Added one more workaround of alternative not completely correct `Symbol` polyfills, [#550](https://github.com/zloirock/core-js/issues/550), [#554](https://github.com/zloirock/core-js/issues/554) ##### 2.6.6 [LEGACY] - 2019.05.20 - Fixed IE8- non-enumerable properties support in `Object.{ assign, entries, values }`, [#541](https://github.com/zloirock/core-js/issues/541) - Fixed support of primitives in `Object.getOwnPropertySymbols` in Chrome 38 / 39, [#539](https://github.com/zloirock/core-js/issues/539) - Show a message on `postinstall` ##### 2.6.5 - 2019.02.15 - Fixed buggy `String#padStart` and `String#padEnd` mobile Safari implementations, [#414](https://github.com/zloirock/core-js/issues/414). ##### 2.6.4 - 2019.02.07 - Added a workaround against crushing an old IE11.0.9600.16384 build, [#485](https://github.com/zloirock/core-js/issues/485). ##### 2.6.3 - 2019.01.22 - Added a workaround for `babel-minify` bug, [#479](https://github.com/zloirock/core-js/issues/479) ##### 2.6.2 - 2019.01.10 - Fixed handling of `$` in `String#replace`, [#471](https://github.com/zloirock/core-js/issues/471) ##### 2.6.1 - 2018.12.18 - Fixed an issue with minified version, [#463](https://github.com/zloirock/core-js/issues/463) ##### 2.6.0 - 2018.12.05 - Add direct .exec calling to `RegExp#{@@replace, @@split, @@match, @@search}`. Also, added fixes for `RegExp#exec` method. [#411](https://github.com/zloirock/core-js/issues/411), [#428](https://github.com/zloirock/core-js/issues/428), [#434](https://github.com/zloirock/core-js/issues/434), [#435](https://github.com/zloirock/core-js/issues/435), [#453](https://github.com/zloirock/core-js/issues/453), [#458](https://github.com/zloirock/core-js/issues/458), thanks [**@nicolo-ribaudo**](https://github.com/nicolo-ribaudo). ##### 2.5.7 - 2018.05.26 - Get rid of reserved variable name `final`, related [#400](https://github.com/zloirock/core-js/issues/400) ##### 2.5.6 - 2018.05.07 - Forced replace native `Promise` in V8 6.6 (Node 10 and Chrome 66) because of [a bug with resolving custom thenables](https://bugs.chromium.org/p/chromium/issues/detail?id=830565) - Added a workaround for usage buggy native LG WebOS 2 `Promise` in microtask implementation, [#396](https://github.com/zloirock/core-js/issues/396) - Added modern version internal debugging information about used versions ##### 2.5.5 - 2018.04.08 - Fix some edge cases of `Reflect.set`, [#392](https://github.com/zloirock/core-js/issues/392) and [#393](https://github.com/zloirock/core-js/issues/393) ##### 2.5.4 - 2018.03.27 - Fixed one case of deoptimization built-in iterators in V8, related [#377](https://github.com/zloirock/core-js/issues/377) - Fixed some cases of iterators feature detection, [#368](https://github.com/zloirock/core-js/issues/368) - Fixed manually entered NodeJS domains issue in `Promise`, [#367](https://github.com/zloirock/core-js/issues/367) - Fixed `Number.{parseInt, parseFloat}` entry points - Fixed `__(define|lookup)[GS]etter__` import in the `library` version ##### 2.5.3 - 2017.12.12 - Fixed calling `onunhandledrejectionhandler` multiple times for one `Promise` chain, [#318](https://github.com/zloirock/core-js/issues/318) - Forced replacement of `String#{padStart, padEnd}` in Safari 10 because of [a bug](https://bugs.webkit.org/show_bug.cgi?id=161944), [#280](https://github.com/zloirock/core-js/issues/280) - Fixed `Array#@@iterator` in a very rare version of `WebKit`, [#236](https://github.com/zloirock/core-js/issues/236) and [#237](https://github.com/zloirock/core-js/issues/237) - One more [#345](https://github.com/zloirock/core-js/issues/345)-related fix ##### 2.5.2 - 2017.12.09 - `MutationObserver` no longer used for microtask implementation in iOS Safari because of bug with scrolling, [#339](https://github.com/zloirock/core-js/issues/339) - Fixed `JSON.stringify(undefined, replacer)` case in the wrapper from the `Symbol` polyfill, [#345](https://github.com/zloirock/core-js/issues/345) - `Array()` calls changed to `new Array()` for V8 optimisation ##### 2.5.1 - 2017.09.01 - Updated `Promise#finally` per [tc39/proposal-promise-finally#37](https://github.com/tc39/proposal-promise-finally/issues/37) - Optimized usage of some internal helpers for reducing size of `shim` version - Fixed some entry points for virtual methods ##### 2.5.0 - 2017.08.05 - Added `Promise#finally` [stage 3 proposal](https://github.com/tc39/proposal-promise-finally), [#225](https://github.com/zloirock/core-js/issues/225) - Added `Promise.try` [stage 1 proposal](https://github.com/tc39/proposal-promise-try) - Added `Array#flatten` and `Array#flatMap` [stage 1 proposal](https://tc39.github.io/proposal-flatMap) - Added `.of` and `.from` methods on collection constructors [stage 1 proposal](https://github.com/tc39/proposal-setmap-offrom): - `Map.of` - `Set.of` - `WeakSet.of` - `WeakMap.of` - `Map.from` - `Set.from` - `WeakSet.from` - `WeakMap.from` - Added `Math` extensions [stage 1 proposal](https://github.com/rwaldron/proposal-math-extensions), [#226](https://github.com/zloirock/core-js/issues/226): - `Math.clamp` - `Math.DEG_PER_RAD` - `Math.degrees` - `Math.fscale` - `Math.RAD_PER_DEG` - `Math.radians` - `Math.scale` - Added `Math.signbit` [stage 1 proposal](http://jfbastien.github.io/papers/Math.signbit.html) - Updated `global` [stage 3 proposal](https://github.com/tc39/proposal-global) - added `global` global object, `System.global` deprecated - Updated `Object.getOwnPropertyDescriptors` to the [final version](https://tc39.github.io/ecma262/2017/#sec-object.getownpropertydescriptors) - it should not create properties if descriptors are `undefined` - Updated the list of iterable DOM collections, [#249](https://github.com/zloirock/core-js/issues/249), added: - `CSSStyleDeclaration#@@iterator` - `CSSValueList#@@iterator` - `ClientRectList#@@iterator` - `DOMRectList#@@iterator` - `DOMStringList#@@iterator` - `DataTransferItemList#@@iterator` - `FileList#@@iterator` - `HTMLAllCollection#@@iterator` - `HTMLCollection#@@iterator` - `HTMLFormElement#@@iterator` - `HTMLSelectElement#@@iterator` - `MimeTypeArray#@@iterator` - `NamedNodeMap#@@iterator` - `PaintRequestList#@@iterator` - `Plugin#@@iterator` - `PluginArray#@@iterator` - `SVGLengthList#@@iterator` - `SVGNumberList#@@iterator` - `SVGPathSegList#@@iterator` - `SVGPointList#@@iterator` - `SVGStringList#@@iterator` - `SVGTransformList#@@iterator` - `SourceBufferList#@@iterator` - `TextTrackCueList#@@iterator` - `TextTrackList#@@iterator` - `TouchList#@@iterator` - Updated stages of proposals: - [`Object.getOwnPropertyDescriptors`](https://github.com/tc39/proposal-object-getownpropertydescriptors) to [stage 4 (ES2017)](https://tc39.github.io/ecma262/2017/#sec-object.getownpropertydescriptors) - [String padding](https://github.com/tc39/proposal-string-pad-start-end) to [stage 4 (ES2017)](https://tc39.github.io/ecma262/2017/#sec-string.prototype.padend) - [`global`](https://github.com/tc39/proposal-global) to [stage 3](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-09/sept-28.md#revisit-systemglobal--global) - [String trimming](https://github.com/tc39/proposal-string-left-right-trim) to [stage 2](https://github.com/rwaldron/tc39-notes/blob/master/es7/2016-07/jul-27.md#10iic-trimstarttrimend) - Updated typed arrays to the modern (ES2016+) arguments validation, [#293](https://github.com/zloirock/core-js/pull/293) - Fixed `%TypedArray%.from` Safari bug, [#285](https://github.com/zloirock/core-js/issues/285) - Fixed compatibility with old version of Prototype.js, [#278](https://github.com/zloirock/core-js/issues/278), [#289](https://github.com/zloirock/core-js/issues/289) - `Function#name` no longer cache the result for correct behaviour with inherited constructors, [#296](https://github.com/zloirock/core-js/issues/296) - Added errors on incorrect context of collection methods, [#272](https://github.com/zloirock/core-js/issues/272) - Fixed conversion typed array constructors to string, fix [#300](https://github.com/zloirock/core-js/issues/300) - Fixed `Set#size` with debugger ReactNative for Android, [#297](https://github.com/zloirock/core-js/issues/297) - Fixed an issue with Electron-based debugger, [#230](https://github.com/zloirock/core-js/issues/230) - Fixed compatibility with incomplete third-party `WeakMap` polyfills, [#252](https://github.com/zloirock/core-js/pull/252) - Added a fallback for `Date#toJSON` in engines without native `Date#toISOString`, [#220](https://github.com/zloirock/core-js/issues/220) - Added support for Sphere Dispatch API, [#286](https://github.com/zloirock/core-js/pull/286) - Seriously changed the coding style and the [ESLint config](https://github.com/zloirock/core-js/blob/master/.eslintrc.js) - Updated many dev dependencies (`webpack`, `uglify`, etc) - Some other minor fixes and optimizations ##### 2.4.1 - 2016.07.18 - Fixed `script` tag for some parsers, [#204](https://github.com/zloirock/core-js/issues/204), [#216](https://github.com/zloirock/core-js/issues/216) - Removed some unused variables, [#217](https://github.com/zloirock/core-js/issues/217), [#218](https://github.com/zloirock/core-js/issues/218) - Fixed MS Edge `Reflect.construct` and `Reflect.apply` - they should not allow primitive as `argumentsList` argument ##### 1.2.7 [LEGACY] - 2016.07.18 - 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) ##### 2.4.0 - 2016.05.08 - Added `Observable`, [stage 1 proposal](https://github.com/zenparsing/es-observable) - Fixed behavior `Object.{getOwnPropertySymbols, getOwnPropertyDescriptor}` and `Object#propertyIsEnumerable` on `Object.prototype` - `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) ##### 2.3.0 - 2016.04.24 - 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) - Added well-known symbol `Symbol.asyncIterator` for [stage 2 async iteration proposal](https://github.com/tc39/proposal-async-iteration) - Added well-known symbol `Symbol.observable` for [stage 1 observables proposal](https://github.com/zenparsing/es-observable) - `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) - `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) - `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) - `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) - `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) - Added fallback for `Function#name` on non-extensible functions and functions with broken `toString` conversion, [#193](https://github.com/zloirock/core-js/issues/193) ##### 2.2.2 - 2016.04.06 - Added conversion `-0` to `+0` to `Array#{indexOf, lastIndexOf}`, [ES2016 fix](https://github.com/tc39/ecma262/pull/316) - Added fixes for some `Math` methods in Tor Browser - `Array.{from, of}` no longer calls prototype setters - Added workaround over Chrome DevTools strange behavior, [#186](https://github.com/zloirock/core-js/issues/186) ##### 2.2.1 - 2016.03.19 - Fixed `Object.getOwnPropertyNames(window)` `2.1+` versions bug, [#181](https://github.com/zloirock/core-js/issues/181) ##### 2.2.0 - 2016.03.15 - Added `String#matchAll`, [proposal](https://github.com/tc39/String.prototype.matchAll) - Added `Object#__(define|lookup)[GS]etter__`, [annex B ES2017](https://github.com/tc39/ecma262/pull/381) - Added `@@toPrimitive` methods to `Date` and `Symbol` - Fixed `%TypedArray%#slice` in Edge ~ 13 (throws with `@@species` and wrapped / inherited constructor) - Some other minor fixes ##### 2.1.5 - 2016.03.12 - Improved support NodeJS domains in `Promise#then`, [#180](https://github.com/zloirock/core-js/issues/180) - Added fallback for `Date#toJSON` bug in Qt Script, [#173](https://github.com/zloirock/core-js/issues/173#issuecomment-193972502) ##### 2.1.4 - 2016.03.08 - Added fallback for `Symbol` polyfill in Qt Script, [#173](https://github.com/zloirock/core-js/issues/173) - Added one more fallback for IE11 `Script Access Denied` error with iframes, [#165](https://github.com/zloirock/core-js/issues/165) ##### 2.1.3 - 2016.02.29 - Added fallback for [`es6-promise` package bug](https://github.com/stefanpenner/es6-promise/issues/169), [#176](https://github.com/zloirock/core-js/issues/176) ##### 2.1.2 - 2016.02.29 - Some minor `Promise` fixes: - Browsers `rejectionhandled` event better HTML spec complaint - Errors in unhandled rejection handlers should not cause any problems - Fixed typo in feature detection ##### 2.1.1 - 2016.02.22 - Some `Promise` improvements: - Feature detection: - **Added detection unhandled rejection tracking support - now it's available everywhere**, [#140](https://github.com/zloirock/core-js/issues/140) - Added detection `@@species` pattern support for completely correct subclassing - Removed usage `Object.setPrototypeOf` from feature detection and noisy console message about it in FF - `Promise.all` fixed for some very specific cases ##### 2.1.0 - 2016.02.09 - **API**: - ES5 polyfills are split and logic, used in other polyfills, moved to internal modules - **All entry point works in ES3 environment like IE8- without `core-js/(library/)es5`** - **Added all missed single entry points for ES5 polyfills** - Separated ES5 polyfills moved to the ES6 namespace. Why? - Mainly, for prevent duplication features in different namespaces - logic of most required ES5 polyfills changed in ES6+: - Already added changes for: `Object` statics - should accept primitives, new whitespaces lists in `String#trim`, `parse(Int|float)`, `RegExp#toString` logic, `String#split`, etc - Should be changed in the future: `@@species` and `ToLength` logic in `Array` methods, `Date` parsing, `Function#bind`, etc - Should not be changed only several features like `Array.isArray` and `Date.now` - Some ES5 polyfills required for modern engines - All old entry points should work fine, but in the next major release API can be changed - `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) - 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) - Returned entry points for `Array` statics, removed in `2.0`, for compatibility with `babel` `6` and for future fixes - **Deprecated**: - `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) - **New Features**: - 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): - `Reflect.defineMetadata` - `Reflect.deleteMetadata` - `Reflect.getMetadata` - `Reflect.getMetadataKeys` - `Reflect.getOwnMetadata` - `Reflect.getOwnMetadataKeys` - `Reflect.hasMetadata` - `Reflect.hasOwnMetadata` - `Reflect.metadata` - Implementation / fixes `Date#toJSON` - Fixes for `parseInt` and `Number.parseInt` - Fixes for `parseFloat` and `Number.parseFloat` - Fixes for `RegExp#toString` - Fixes for `Array#sort` - Fixes for `Number#toFixed` - Fixes for `Number#toPrecision` - Additional fixes for `String#split` (`RegExp#@@split`) - **Improvements**: - Correct subclassing wrapped collections, `Number` and `RegExp` constructors with native class syntax - Correct support `SharedArrayBuffer` and buffers from other realms in typed arrays wrappers - Additional validations for `Object.{defineProperty, getOwnPropertyDescriptor}` and `Reflect.defineProperty` - **Bug Fixes**: - Fixed some cases `Array#lastIndexOf` with negative second argument ##### 2.0.3 - 2016.01.11 - Added fallback for V8 ~ Chrome 49 `Promise` subclassing bug causes unhandled rejection on feature detection, [#159](https://github.com/zloirock/core-js/issues/159) - Added fix for very specific environments with global `window === null` ##### 2.0.2 - 2016.01.04 - 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`. ##### 2.0.1 - 2015.12.31 - Forced usage `Promise.resolve` polyfill in the `library` version for correct work with wrapper - `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) ##### 2.0.0 - 2015.12.24 - Added implementations and fixes [Typed Arrays](https://github.com/zloirock/core-js#ecmascript-6-typed-arrays)-related features - `ArrayBuffer`, `ArrayBuffer.isView`, `ArrayBuffer#slice` - `DataView` with all getter / setter methods - `Int8Array`, `Uint8Array`, `Uint8ClampedArray`, `Int16Array`, `Uint16Array`, `Int32Array`, `Uint32Array`, `Float32Array` and `Float64Array` constructors - `%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, ...}` - 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) - 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) - Added [`Math.{iaddh, isubh, imulh, umulh}`](https://github.com/zloirock/core-js#ecmascript-7-proposals), [proposal](https://gist.github.com/BrendanEich/4294d5c212a6d2254703) - `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) - [`Promise`](https://github.com/zloirock/core-js#ecmascript-6-promise) - Some performance optimisations - Added basic support [`rejectionHandled` event / `onrejectionhandled` handler](https://github.com/zloirock/core-js#unhandled-rejection-tracking) to the polyfill - 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) - Some improvements [collections polyfills](https://github.com/zloirock/core-js#ecmascript-6-collections) - `O(1)` and preventing possible leaks with frozen keys, [#134](https://github.com/zloirock/core-js/issues/134) - Correct observable state object keys - 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) - 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) - 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) - 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) - 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`. - 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) - Removed `core.log` module - CommonJS API - Added entry points for [virtual methods](https://github.com/zloirock/core-js#commonjs-and-prototype-methods-without-global-namespace-pollution) - Added entry points for [stages proposals](https://github.com/zloirock/core-js#ecmascript-7-proposals) - Some other minor changes - [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 - Changed `$` prefix for internal modules file names because Team Foundation Server does not support it, [#129](https://github.com/zloirock/core-js/issues/129) - Additional fix for `SameValueZero` in V8 ~ Chromium 39-42 collections - Additional fix for FF27 `Array` iterator - Removed usage shortcuts for `arguments` object - old WebKit bug, [#150](https://github.com/zloirock/core-js/issues/150) - `{Map, Set}#forEach` non-generic, [#144](https://github.com/zloirock/core-js/issues/144) - Many other improvements ##### 1.2.6 - 2015.11.09 * Reject with `TypeError` on attempt resolve promise itself * Correct behavior with broken `Promise` subclass constructors / methods * Added `Promise`-based fallback for microtask * Fixed V8 and FF `Array#{values, @@iterator}.name` * Fixed IE7- `[1, 2].join(undefined) -> '1,2'` * Some other fixes / improvements / optimizations ##### 1.2.5 - 2015.11.02 * Some more `Number` constructor fixes: * Fixed V8 ~ Node 0.8 bug: `Number('+0x1')` should be `NaN` * Fixed `Number(' 0b1\n')` case, should be `1` * Fixed `Number()` case, should be `0` ##### 1.2.4 - 2015.11.01 * Fixed `Number('0b12') -> NaN` case in the shim * Fixed V8 ~ Chromium 40- bug - `Weak(Map|Set)#{delete, get, has}` should not throw errors [#124](https://github.com/zloirock/core-js/issues/124) * Some other fixes and optimizations ##### 1.2.3 - 2015.10.23 * Fixed some problems related old V8 bug `Object('a').propertyIsEnumerable(0) // => false`, for example, `Object.assign({}, 'qwe')` from the last release * Fixed `.name` property and `Function#toString` conversion some polyfilled methods * Fixed `Math.imul` arity in Safari 8- ##### 1.2.2 - 2015.10.18 * Improved optimisations for V8 * Fixed build process from external packages, [#120](https://github.com/zloirock/core-js/pull/120) * One more `Object.{assign, values, entries}` fix for [**very** specific case](https://github.com/ljharb/proposal-object-values-entries/issues/5) ##### 1.2.1 - 2015.10.02 * 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) * Fixed typo which broke tasks scheduler in WebWorkers in old FF, [#114](https://github.com/zloirock/core-js/pull/114) ##### 1.2.0 - 2015.09.27 * Added browser [`Promise` rejection hook](#unhandled-rejection-tracking), [#106](https://github.com/zloirock/core-js/issues/106) * 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) * 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 * 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 * 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) * Fixed [`Math.sinh`](https://github.com/zloirock/core-js/#ecmascript-6-math) with very small numbers in V8 near Chromium 38 * Some other fixes and optimizations ##### 1.1.4 - 2015.09.05 * Fixed support symbols in FF34-35 [`Object.assign`](https://github.com/zloirock/core-js/#ecmascript-6-object) * Fixed [collections iterators](https://github.com/zloirock/core-js/#ecmascript-6-iterators) in FF25-26 * Fixed non-generic WebKit [`Array.of`](https://github.com/zloirock/core-js/#ecmascript-6-array) * Some other fixes and optimizations ##### 1.1.3 - 2015.08.29 * 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) ##### 1.1.2 - 2015.08.28 * 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 * Replaced [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) implementations w/o correct support third argument * Fixed `global` detection with changed `document.domain` in ~IE8, [#100](https://github.com/zloirock/core-js/issues/100) ##### 1.1.1 - 2015.08.20 * Added more correct microtask implementation for [`Promise`](#ecmascript-6-promise) ##### 1.1.0 - 2015.08.17 * 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: * `String#lpad` -> `String#padLeft` * `String#rpad` -> `String#padRight` * 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: * `String#trimLeft` * `String#trimRight` * [`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 * Splitted [`es6.object.statics-accept-primitives`](https://github.com/zloirock/core-js/#ecmascript-6-object) * 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) * `es5` [namespace](https://github.com/zloirock/core-js/#commonjs) also includes modules, moved to `es6` namespace - you can use it as before * Increased `MessageChannel` priority in `$.task`, [#95](https://github.com/zloirock/core-js/issues/95) * Does not get `global.Symbol` on each getting iterator, if you wanna use alternative `Symbol` shim - add it before `core-js` * [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) optimized and fixed for some cases * 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) * Some corrections in [`Math.acosh`](https://github.com/zloirock/core-js/#ecmascript-6-math) * Fixed [`Math.imul`](https://github.com/zloirock/core-js/#ecmascript-6-math) for old WebKit * Some fixes in string / RegExp [well-known symbols](https://github.com/zloirock/core-js/#ecmascript-6-regexp) logic * Some other fixes and optimizations ##### 1.0.1 - 2015.07.31 * Some fixes for final MS Edge, replaced broken native `Reflect.defineProperty` * Some minor fixes and optimizations * 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) ##### 1.0.0 - 2015.07.22 * Added logic for [well-known symbols](https://github.com/zloirock/core-js/#ecmascript-6-regexp): * `Symbol.match` * `Symbol.replace` * `Symbol.split` * `Symbol.search` * Actualized and optimized work with iterables: * 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` * Optimized [`Array.from`](https://github.com/zloirock/core-js/#ecmascript-6-array) for default `Array Iterator` * Added [`core.getIteratorMethod`](https://github.com/zloirock/core-js/#ecmascript-6-iterators) helper * Uses enumerable properties in shimmed instances - collections, iterators, etc for optimize performance * Added support native constructors to [`Reflect.construct`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) with 2 arguments * Added support native constructors to [`Function#bind`](https://github.com/zloirock/core-js/#ecmascript-5) shim with `new` * Removed obsolete `.clear` methods native [`Weak`-collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) * Maximum modularity, reduced minimal custom build size, separated into submodules: * [`es6.reflect`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) * [`es6.regexp`](https://github.com/zloirock/core-js/#ecmascript-6-regexp) * [`es6.math`](https://github.com/zloirock/core-js/#ecmascript-6-math) * [`es6.number`](https://github.com/zloirock/core-js/#ecmascript-6-number) * [`es7.object.to-array`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * [`core.object`](https://github.com/zloirock/core-js/#object) * [`core.string`](https://github.com/zloirock/core-js/#escaping-strings) * [`core.iter-helpers`](https://github.com/zloirock/core-js/#ecmascript-6-iterators) * Internal modules (`$`, `$.iter`, etc) * Many other optimizations * Final cleaning non-standard features * Moved `$for` to [separate library](https://github.com/zloirock/forof). This work for syntax - `for-of` loop and comprehensions * Moved `Date#{format, formatUTC}` to [separate library](https://github.com/zloirock/dtf). Standard way for this - `ECMA-402` * Removed `Math` methods from `Number.prototype`. Slight sugar for simple `Math` methods calling * Removed `{Array#, Array, Dict}.turn` * Removed `core.global` * 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]` * Fixed [#85](https://github.com/zloirock/core-js/issues/85) - invalid `Promise` unhandled rejection message in nested `setTimeout` * Fixed [#86](https://github.com/zloirock/core-js/issues/86) - support FF extensions * Fixed [#89](https://github.com/zloirock/core-js/issues/89) - behavior `Number` constructor in strange case ##### 0.9.18 - 2015.06.17 * Removed `/` from [`RegExp.escape`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) escaped characters ##### 0.9.17 - 2015.06.14 * Updated [`RegExp.escape`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) to the [latest proposal](https://github.com/benjamingr/RexExp.escape) * Fixed conflict with webpack dev server + IE buggy behavior ##### 0.9.16 - 2015.06.11 * More correct order resolving thenable in [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) polyfill * Uses polyfill instead of [buggy V8 `Promise`](https://github.com/zloirock/core-js/issues/78) ##### 0.9.15 - 2015.06.09 * [Collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) from `library` version return wrapped native instances * Fixed collections prototype methods in `library` version * Optimized [`Math.hypot`](https://github.com/zloirock/core-js/#ecmascript-6-math) ##### 0.9.14 - 2015.06.04 * Updated [`Promise.resolve` behavior](https://esdiscuss.org/topic/fixing-promise-resolve) * Added fallback for IE11 buggy `Object.getOwnPropertyNames` + iframe * Some other fixes ##### 0.9.13 - 2015.05.25 * Added fallback for [`Symbol` polyfill](https://github.com/zloirock/core-js/#ecmascript-6-symbol) for old Android * Some other fixes ##### 0.9.12 - 2015.05.24 * Different instances `core-js` should use / recognize the same symbols * Some fixes ##### 0.9.11 - 2015.05.18 * Simplified [custom build](https://github.com/zloirock/core-js/#custom-build) * Added custom build js api * Added `grunt-cli` to `devDependencies` for `npm run grunt` * Some fixes ##### 0.9.10 - 2015.05.16 * Wrapped `Function#toString` for correct work wrapped methods / constructors with methods similar to the [`lodash` `isNative`](https://github.com/lodash/lodash/issues/1197) * Added proto versions of methods to export object in `default` version for consistency with `library` version ##### 0.9.9 - 2015.05.14 * Wrapped `Object#propertyIsEnumerable` for [`Symbol` polyfill](https://github.com/zloirock/core-js/#ecmascript-6-symbol) * [Added proto versions of methods to `library` for ES7 bind syntax](https://github.com/zloirock/core-js/issues/65) * Some other fixes ##### 0.9.8 - 2015.05.12 * Fixed [`Math.hypot`](https://github.com/zloirock/core-js/#ecmascript-6-math) with negative arguments * Added `Object#toString.toString` as fallback for [`lodash` `isNative`](https://github.com/lodash/lodash/issues/1197) ##### 0.9.7 - 2015.05.07 * 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` ##### 0.9.6 - 2015.05.01 * Added [`String#lpad`, `String#rpad`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) ##### 0.9.5 - 2015.04.30 * Added cap for `Function#@@hasInstance` * Some fixes and optimizations ##### 0.9.4 - 2015.04.27 * Fixed `RegExp` constructor ##### 0.9.3 - 2015.04.26 * Some fixes and optimizations ##### 0.9.2 - 2015.04.25 * More correct [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) unhandled rejection tracking and resolving / rejection priority ##### 0.9.1 - 2015.04.25 * Fixed `__proto__`-based [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) subclassing in some environments ##### 0.9.0 - 2015.04.24 * Added correct [symbols](https://github.com/zloirock/core-js/#ecmascript-6-symbol) descriptors * Fixed behavior `Object.{assign, create, defineProperty, defineProperties, getOwnPropertyDescriptor, getOwnPropertyDescriptors}` with symbols * Added [single entry points](https://github.com/zloirock/core-js/#commonjs) for `Object.{create, defineProperty, defineProperties}` * Added [`Map#toJSON`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * 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) * Removed non-standard undocumented methods `Symbol.{pure, set}` * Some fixes and internal changes ##### 0.8.4 - 2015.04.18 * Uses `webpack` instead of `browserify` for browser builds - more compression-friendly result ##### 0.8.3 - 2015.04.14 * Fixed `Array` statics with single entry points ##### 0.8.2 - 2015.04.13 * [`Math.fround`](https://github.com/zloirock/core-js/#ecmascript-6-math) now also works in IE9- * Added [`Set#toJSON`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * Some optimizations and fixes ##### 0.8.1 - 2015.04.03 * Fixed `Symbol.keyFor` ##### 0.8.0 - 2015.04.02 * Changed [CommonJS API](https://github.com/zloirock/core-js/#commonjs) * Splitted and renamed some modules * 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) * Removed [abstract references](https://github.com/zenparsing/es-abstract-refs) support - proposal has been superseded =\ * [`$for.isIterable` -> `core.isIterable`, `$for.getIterator` -> `core.getIterator`](https://github.com/zloirock/core-js/#ecmascript-6-iterators), temporary available in old namespace * Fixed iterators support in v8 `Promise.all` and `Promise.race` * Many other fixes ##### 0.7.2 - 2015.03.09 * Some fixes ##### 0.7.1 - 2015.03.07 * Some fixes ##### 0.7.0 - 2015.03.06 * Rewritten and splitted into [CommonJS modules](https://github.com/zloirock/core-js/#commonjs) ##### 0.6.1 - 2015.02.24 * Fixed support [`Object.defineProperty`](https://github.com/zloirock/core-js/#ecmascript-5) with accessors on DOM elements on IE8 ##### 0.6.0 - 2015.02.23 * Added support safe closing iteration - calling `iterator.return` on abort iteration, if it exists * Added basic support [`Promise`](https://github.com/zloirock/core-js/#ecmascript-6-promise) unhandled rejection tracking in shim * Added [`Object.getOwnPropertyDescriptors`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * Removed `console` cap - creates too many problems * Restructuring [namespaces](https://github.com/zloirock/core-js/#custom-build) * Some fixes ##### 0.5.4 - 2015.02.15 * Some fixes ##### 0.5.3 - 2015.02.14 * Added [support binary and octal literals](https://github.com/zloirock/core-js/#ecmascript-6-number) to `Number` constructor * Added [`Date#toISOString`](https://github.com/zloirock/core-js/#ecmascript-5) ##### 0.5.2 - 2015.02.10 * Some fixes ##### 0.5.1 - 2015.02.09 * Some fixes ##### 0.5.0 - 2015.02.08 * Systematization of modules * Splitted [`es6` module](https://github.com/zloirock/core-js/#ecmascript-6) * Splitted `console` module: `web.console` - only cap for missing methods, `core.log` - bound methods & additional features * Added [`delay` method](https://github.com/zloirock/core-js/#delay) * Some fixes ##### 0.4.10 - 2015.01.28 * [`Object.getOwnPropertySymbols`](https://github.com/zloirock/core-js/#ecmascript-6-symbol) polyfill returns array of wrapped keys ##### 0.4.9 - 2015.01.27 * FF20-24 fix ##### 0.4.8 - 2015.01.25 * Some [collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) fixes ##### 0.4.7 - 2015.01.25 * Added support frozen objects as [collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) keys ##### 0.4.6 - 2015.01.21 * Added [`Object.getOwnPropertySymbols`](https://github.com/zloirock/core-js/#ecmascript-6-symbol) * Added [`NodeList.prototype[@@iterator]`](https://github.com/zloirock/core-js/#ecmascript-6-iterators) * Added basic `@@species` logic - getter in native constructors * Removed `Function#by` * Some fixes ##### 0.4.5 - 2015.01.16 * Some fixes ##### 0.4.4 - 2015.01.11 * Enabled CSP support ##### 0.4.3 - 2015.01.10 * Added `Function` instances `name` property for IE9+ ##### 0.4.2 - 2015.01.10 * `Object` static methods accept primitives * `RegExp` constructor can alter flags (IE9+) * Added `Array.prototype[Symbol.unscopables]` ##### 0.4.1 - 2015.01.05 * Some fixes ##### 0.4.0 - 2015.01.03 * Added [`es6.reflect`](https://github.com/zloirock/core-js/#ecmascript-6-reflect) module: * Added `Reflect.apply` * Added `Reflect.construct` * Added `Reflect.defineProperty` * Added `Reflect.deleteProperty` * Added `Reflect.enumerate` * Added `Reflect.get` * Added `Reflect.getOwnPropertyDescriptor` * Added `Reflect.getPrototypeOf` * Added `Reflect.has` * Added `Reflect.isExtensible` * Added `Reflect.preventExtensions` * Added `Reflect.set` * Added `Reflect.setPrototypeOf` * `core-js` methods now can use external `Symbol.iterator` polyfill * Some fixes ##### 0.3.3 - 2014.12.28 * [Console cap](https://github.com/zloirock/core-js/#console) excluded from node.js default builds ##### 0.3.2 - 2014.12.25 * Added cap for [ES5](https://github.com/zloirock/core-js/#ecmascript-5) freeze-family methods * Fixed `console` bug ##### 0.3.1 - 2014.12.23 * Some fixes ##### 0.3.0 - 2014.12.23 * Optimize [`Map` & `Set`](https://github.com/zloirock/core-js/#ecmascript-6-collections): * Use entries chain on hash table * Fast & correct iteration * 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 ##### 0.2.5 - 2014.12.20 * `console` no longer shortcut for `console.log` (compatibility problems) * Some fixes ##### 0.2.4 - 2014.12.17 * Better compliance of ES6 * Added [`Math.fround`](https://github.com/zloirock/core-js/#ecmascript-6-math) (IE10+) * Some fixes ##### 0.2.3 - 2014.12.15 * [Symbols](https://github.com/zloirock/core-js/#ecmascript-6-symbol): * Added option to disable addition setter to `Object.prototype` for Symbol polyfill: * Added `Symbol.useSimple` * Added `Symbol.useSetter` * Added cap for well-known Symbols: * Added `Symbol.hasInstance` * Added `Symbol.isConcatSpreadable` * Added `Symbol.match` * Added `Symbol.replace` * Added `Symbol.search` * Added `Symbol.species` * Added `Symbol.split` * Added `Symbol.toPrimitive` * Added `Symbol.unscopables` ##### 0.2.2 - 2014.12.13 * 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)) * Added [`String.raw`](https://github.com/zloirock/core-js/#ecmascript-6-string) ##### 0.2.1 - 2014.12.12 * Repair converting -0 to +0 in [native collections](https://github.com/zloirock/core-js/#ecmascript-6-collections) ##### 0.2.0 - 2014.12.06 * Added [`es7.proposals`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) and [`es7.abstract-refs`](https://github.com/zenparsing/es-abstract-refs) modules * Added [`String#at`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * Added real [`String Iterator`](https://github.com/zloirock/core-js/#ecmascript-6-iterators), older versions used Array Iterator * Added abstract references support: * Added `Symbol.referenceGet` * Added `Symbol.referenceSet` * Added `Symbol.referenceDelete` * Added `Function#@@referenceGet` * Added `Map#@@referenceGet` * Added `Map#@@referenceSet` * Added `Map#@@referenceDelete` * Added `WeakMap#@@referenceGet` * Added `WeakMap#@@referenceSet` * Added `WeakMap#@@referenceDelete` * Added `Dict.{...methods}[@@referenceGet]` * Removed deprecated `.contains` methods * Some fixes ##### 0.1.5 - 2014.12.01 * Added [`Array#copyWithin`](https://github.com/zloirock/core-js/#ecmascript-6-array) * Added [`String#codePointAt`](https://github.com/zloirock/core-js/#ecmascript-6-string) * Added [`String.fromCodePoint`](https://github.com/zloirock/core-js/#ecmascript-6-string) ##### 0.1.4 - 2014.11.27 * Added [`Dict.mapPairs`](https://github.com/zloirock/core-js/#dict) ##### 0.1.3 - 2014.11.20 * [TC39 November meeting](https://github.com/rwaldron/tc39-notes/tree/master/es6/2014-11): * [`.contains` -> `.includes`](https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-11/nov-18.md#51--44-arrayprototypecontains-and-stringprototypecontains) * `String#contains` -> [`String#includes`](https://github.com/zloirock/core-js/#ecmascript-6-string) * `Array#contains` -> [`Array#includes`](https://github.com/zloirock/core-js/#ecmascript-7-proposals) * `Dict.contains` -> [`Dict.includes`](https://github.com/zloirock/core-js/#dict) * [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) * [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) ##### 0.1.2 - 2014.11.19 * `Map` & `Set` bug fix ##### 0.1.1 - 2014.11.18 * Public release