Changelog

2.3.0 - 2016.04.24

• Added asap for enqueuing microtasks, stage 0 proposal
• Added well-known symbol Symbol.asyncIterator for stage 2 async iteration proposal
• Added well-known symbol Symbol.observable for stage 1 observables proposal
• String#{padStart, padEnd} returns original string if filler is empty string, T39 meeting notes
• Object.values and Object.entries moved to stage 4 from 3, T39 meeting notes
• System.global moved to stage 2 from 1, T39 meeting notes
• Map#toJSON and Set#toJSON rejected and will be removed from the next major release, T39 meeting notes
• Error.isError withdrawn and will be removed from the next major release, T39 meeting notes
• Added fallback for Function#name on non-extensible functions and functions with broken toString conversion, #193

2.2.2 - 2016.04.06

• Added conversion -0 to +0 to Array#{indexOf, lastIndexOf}, ES2016 fix
• 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

2.2.1 - 2016.03.19

• Fixed Object.getOwnPropertyNames(window) 2.1+ versions bug, #181

2.2.0 - 2016.03.15

• Added String#matchAll, proposal
• Added Object#__(define|lookup)[GS]etter__, annex B ES2017
• 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
• Added fallback for Date#toJSON bug in Qt Script, #173

2.1.4 - 2016.03.08

• Added fallback for Symbol polyfill in Qt Script, #173
• Added one more fallback for IE11 Script Access Denied error with iframes, #165

2.1.3 - 2016.02.29

• Added fallback for es6-promise package bug, #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
    • 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
  • Added umd option for custom build process, #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
• New Features:
  • Added Reflect metadata API as a pre-strawman feature, #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
• 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 (-> socket.io) which passes to Buffer constructor -> Uint8Array float and uses the V8 bug for conversion to int (by the spec should be thrown an error). It creates problems for many people. 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

2.0.0 - 2015.12.24

• added implementations and fixes 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, proposal, November TC39 meeting
• added Error.isError, proposal, November TC39 meeting
• added Math.{iaddh, isubh, imulh, umulh}, proposal
• RegExp.escape moved from the es7 to the non-standard core namespace, July TC39 meeting - too slow, but it's condition of stability, #116
• Promise
  • some performance optimisations
  • added basic support rejectionHandled event / onrejectionhandled handler to the polyfill
  • removed usage @@species from Promise.{all, race}, November TC39 meeting
• some improvements collections polyfills
  • O(1) and preventing possible leaks with frozen keys, #134
  • correct observable state object keys
• renamed String#{padLeft, padRight} -> String#{padStart, padEnd}, proposal, November TC39 meeting (they want to rename it on each meeting?O_o), #132
• added String#{trimStart, trimEnd} as aliases for String#{trimLeft, trimRight}, proposal, November TC39 meeting
• added annex B HTML methods - ugly, but also the part of the spec
• added little fix for Date#toString - new Date(NaN).toString() should be 'Invalid Date'
• added {keys, values, entries, @@iterator} methods to DOM collections which should have iterable interface or should be inherited from Array - NodeList, DOMTokenList, MediaList, StyleSheetList, CSSRuleList.
• removed Mozilla Array generics - deprecated and will be removed from FF, looks like strawman is dead, available alternative shim
• removed core.log module
• CommonJS API
  • added entry points for virtual methods
  • added entry points for stages proposals
  • some other minor changes
• 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
• 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
• {Map, Set}#forEach non-generic, #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
• 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
• one more Object.{assign, values, entries} fix for very specific case

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
• fixed typo which broke tasks scheduler in WebWorkers in old FF, #114

1.2.0 - 2015.09.27

• added browser Promise rejection hook, #106
• added correct IsRegExp logic to String#{includes, startsWith, endsWith} and RegExp constructor, @@match case, example
• updated String#leftPad with proposal: string filler truncated from the right side
• replaced V8 Object.assign - its properties order not only incorrect, it is non-deterministic and it causes some problems
• fixed behavior with deleted in getters properties for Object.{assign, entries, values}, example
• fixed Math.sinh 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
• fixed collections iterators in FF25-26
• fixed non-generic WebKit Array.of
• some other fixes and optimizations

1.1.3 - 2015.08.29

• fixed support Node.js domains in Promise, #103

1.1.2 - 2015.08.28

• added toJSON method to Symbol polyfill and to MS Edge implementation for expected JSON.stringify result w/o patching this method
• replaced Reflect.construct implementations w/o correct support third argument
• fixed global detection with changed document.domain in ~IE8, #100

1.1.1 - 2015.08.20

• added more correct microtask implementation for Promise

1.1.0 - 2015.08.17

• updated string padding to actual proposal - renamed, minor internal changes:
  • String#lpad -> String#padLeft
  • String#rpad -> String#padRight
• added string trim functions - proposal, defacto standard - required only for IE11- and fixed for some old engines:
  • String#trimLeft
  • String#trimRight
• String#trim fixed for some engines by es6 spec and moved from es5 to single es6 module
• splitted es6.object.statics-accept-primitives
• caps for freeze-family Object methods moved from es5 to es6 namespace and joined with es6 wrappers
• es5 namespace also includes modules, moved to es6 namespace - you can use it as before
• increased MessageChannel priority in $.task, #95
• does not get global.Symbol on each getting iterator, if you wanna use alternative Symbol shim - add it before core-js
• Reflect.construct optimized and fixed for some cases
• simplified Reflect.enumerate, see this question
• some corrections in Math.acosh
• fixed Math.imul for old WebKit
• some fixes in string / RegExp well-known symbols 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

1.0.0 - 2015.07.22

• added logic for well-known symbols:
  • Symbol.match
  • Symbol.replace
  • Symbol.split
  • Symbol.search
• actualized and optimized work with iterables:
  • optimized Map, Set, WeakMap, WeakSet constructors, Promise.all, Promise.race for default Array Iterator
  • optimized Array.from for default Array Iterator
  • added core.getIteratorMethod helper
• uses enumerable properties in shimmed instances - collections, iterators, etc for optimize performance
• added support native constructors to Reflect.construct with 2 arguments
• added support native constructors to Function#bind shim with new
• removed obsolete .clear methods native Weak-collections
• maximum modularity, reduced minimal custom build size, separated into submodules:
  • es6.reflect
  • es6.regexp
  • es6.math
  • es6.number
  • es7.object.to-array
  • core.object
  • core.string
  • core.iter-helpers
  • internal modules ($, $.iter, etc)
• many other optimizations
• final cleaning non-standard features
  • moved $for to separate library. This work for syntax - for-of loop and comprehensions
  • moved Date#{format, formatUTC} to separate library. 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, Array.from(2.5) will be [0, 1, 2] instead of [0, 1]
• fixed #85 - invalid Promise unhandled rejection message in nested setTimeout
• fixed #86 - support FF extensions
• fixed #89 - behavior Number constructor in strange case

0.9.18 - 2015.06.17

• removed / from RegExp.escape escaped characters

0.9.17 - 2015.06.14

• updated RegExp.escape to the latest proposal
• fixed conflict with webpack dev server + IE buggy behavior

0.9.16 - 2015.06.11

• more correct order resolving thenable in Promise polyfill
• uses polyfill instead of buggy V8 Promise

0.9.15 - 2015.06.09

• collections from library version return wrapped native instances
• fixed collections prototype methods in library version
• optimized Math.hypot

0.9.14 - 2015.06.04

• updated Promise.resolve behavior
• added fallback for IE11 buggy Object.getOwnPropertyNames + iframe
• some other fixes

0.9.13 - 2015.05.25

• added fallback for Symbol polyfill 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
  • add 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
• 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
• added proto versions of methods to library for ES7 bind syntax
• some other fixes

0.9.8 - 2015.05.12

• fixed Math.hypot with negative arguments
• added Object#toString.toString as fallback for lodash isNative

0.9.7 - 2015.05.07

• added support DOM collections to IE8- Array#slice

0.9.6 - 2015.05.01

• added String#lpad, String#rpad

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 unhandled rejection tracking and resolving / rejection priority

0.9.1 - 2015.04.25

• fixed __proto__-based Promise subclassing in some environments

0.9.0 - 2015.04.24

• added correct symbols descriptors
  • fixed behavior Object.{assign, create, defineProperty, defineProperties, getOwnPropertyDescriptor, getOwnPropertyDescriptors} with symbols
  • added single entry points for Object.{create, defineProperty, defineProperties}
• added Map#toJSON
• 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 bind syntax
• 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 now also works in IE9-
• added Set#toJSON
• some optimizations and fixes

0.8.1 - 2015.04.03

• fixed Symbol.keyFor

0.8.0 - 2015.04.02

• changed CommonJS API
• 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
• removed abstract references support - proposal has been superseded =\
• $for.isIterable -> core.isIterable, $for.getIterator -> core.getIterator, 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

0.6.1 - 2015.02.24

• fixed support Object.defineProperty 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 unhandled rejection tracking in shim
• added Object.getOwnPropertyDescriptors
• removed console cap - creates too many problems
• restructuring namespaces
• some fixes

0.5.4 - 2015.02.15

• some fixes

0.5.3 - 2015.02.14

• added support binary and octal literals to Number constructor
• added Date#toISOString

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
• splitted console module: web.console - only cap for missing methods, core.log - bound methods & additional features
• added delay method
• some fixes

0.4.10 - 2015.01.28

• Object.getOwnPropertySymbols polyfill returns array of wrapped keys

0.4.9 - 2015.01.27

• FF20-24 fix

0.4.8 - 2015.01.25

• some collections fixes

0.4.7 - 2015.01.25

• added support frozen objects as collections keys

0.4.6 - 2015.01.21

• added Object.getOwnPropertySymbols
• added NodeList.prototype[@@iterator]
• 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 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 excluded from node.js default builds

0.3.2 - 2014.12.25

• added cap for ES5 freeze-family methods
• fixed console bug

0.3.1 - 2014.12.23

• some fixes

0.3.0 - 2014.12.23

• Optimize Map & Set:
  • use entries chain on hash table
  • fast & correct iteration
  • iterators moved to es6 and es6.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 (IE10+)
• some fixes

0.2.3 - 2014.12.15

• Symbols:
  • 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 (December 2014 Draft Rev 29)
• added String.raw

0.2.1 - 2014.12.12

• repair converting -0 to +0 in native collections

0.2.0 - 2014.12.06

• added es7.proposals and es7.abstract-refs modules
• added String#at
• added real String Iterator, 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
• added String#codePointAt
• added String.fromCodePoint

0.1.4 - 2014.11.27

• added Dict.mapPairs

0.1.3 - 2014.11.20

• TC39 November meeting:
  • .contains -> .includes
    • String#contains -> String#includes
    • Array#contains -> Array#includes
    • Dict.contains -> Dict.includes
  • removed WeakMap#clear
  • removed WeakSet#clear

0.1.2 - 2014.11.19

• Map & Set bug fix

0.1.1 - 2014.11.18

• public release