npm · #572 most downloaded on npm

core-js

3.50.0271M downloads/mozloirock/core-js ↗New releases in your daily digest, changelog included.

Standard library

Last release 1 months ago
05 Aug 2026
Ships fairly regularly
a new release about every 2 months
Nearly every release is documented
notes for 53 of 53 stable releases
234 versions withdrawn
withdrawn after publishing
13 years old
289 releases · first in 2013

Release timeline

289 releases since 2013

20132015201720192021

Releases

0.9.125 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree
fixed __proto__-based Promise subclassing in some environments
fixed __proto__-based Promise subclassing in some environments
Open source →
0.9.024 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree
added correct symbols descriptors
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, in near future will be available bind syntax

removed non-standard undocumented methods Symbol.{pure, set}

some fixes and internal changes

One column per quarter.

0.8.417 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

uses webpack instead of browserify for browser builds - more compression-friendly result

uses webpack instead of browserify for browser builds - more compression-friendly result

Open source →

0.8.313 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

fixed Array statics with single entry points

fixed Array statics with single entry points

Open source →

0.8.213 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

`Math.fround` now also works in IE9-

Math.fround now also works in IE9-
added Set#toJSON
some optimizations and fixes

Open source →

0.8.13 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Fixed Symbol.keyFor

Fixed Symbol.keyFor

Open source →

0.8.02 Apr 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

splitted and renamed some modules

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

Open source →

0.7.28 Mar 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.7.17 Mar 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.7.05 Mar 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Rewritten and split into CommonJS modules

Rewritten and split into CommonJS modules

Open source →

0.6.124 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

Fixed support Object.defineProperty with accessors on DOM elements on IE8

Fixed support Object.defineProperty with accessors on DOM elements on IE8

Open source →

0.6.023 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

added support safe closing iteration - calling iterator.return on abort iteration, if it exists

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 - you can use core.log module as that
restructuring namespaces
some fixes

Open source →

0.5.415 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.5.314 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.2 sources agree

added support binary and octal literals to Number constructor

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

Open source →

0.5.210 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.5.18 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.5.07 Feb 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

splitted console: web.console - only cap for missing methods, core.log - bound methods & additional features

systematization of modules
splitted es6 module
splitted console: web.console - only cap for missing methods, core.log - bound methods & additional features
added delay method
some fixes

Open source →

Additional notes

Systematization of modules
Split es6 module
Split console module: web.console - only cap for missing methods, core.log - bound methods & additional features
Added delay method
Some fixes

Open source →

0.4.1028 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

`Object.getOwnPropertySymbols` polyfill returns array of wrapped keys

Object.getOwnPropertySymbols polyfill returns array of wrapped keys

Open source →

0.4.926 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- FF20-24 fix

FF20-24 fix

Open source →

0.4.825 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some collections fixes

Some collections fixes

Open source →

0.4.724 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added support frozen objects as collections keys

Added support frozen objects as collections keys

Open source →

0.4.621 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added `Object.getOwnPropertySymbols`

Added Object.getOwnPropertySymbols
Added NodeList.prototype[@@iterator]
Added basic @@species logic - getter in native constructors
Removed Function#by
Some fixes

Open source →

0.4.516 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.4.411 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Enabled CSP support

Enabled CSP support

Open source →

0.4.310 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added Function instances name property for IE9+

Added Function instances name property for IE9+

Open source →

0.4.210 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Object static methods accept primitives

Object static methods accept primitives
RegExp constructor can alter flags (IE9+)
Added Array.prototype[Symbol.unscopables]

Open source →

0.4.15 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.4.04 Jan 2015withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added Reflect.getOwnPropertyDescriptor

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

Open source →

0.3.328 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Console cap excluded from node.js default builds

Console cap excluded from node.js default builds

Open source →

0.3.225 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added cap for ES5 freeze-family methods

Added cap for ES5 freeze-family methods
Fixed console bug

Open source →

0.3.123 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Some fixes

Some fixes

Open source →

0.3.022 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Use entries chain on hash table

Optimize Map & Set:
- Use entries chain on hash table
- Fast & correct iteration
- Iterators moved to es6 and es6.collections modules

Open source →

0.2.520 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

console no longer shortcut for console.log (compatibility problems)

console no longer shortcut for console.log (compatibility problems)
Some fixes

Open source →

0.2.417 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Better compliance of ES6 - Added `Math.fround` (IE10+) - Some fixes

Better compliance of ES6
Added Math.fround (IE10+)
Some fixes

Open source →

0.2.315 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added option to disable addition setter to Object.prototype for Symbol polyfill:

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

Open source →

0.2.212 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Added `RegExp#flags` (December 2014 Draft Rev 29)

Added RegExp#flags (December 2014 Draft Rev 29)
Added String.raw

Open source →

0.2.111 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

Repair converting -0 to +0 in native collections

Repair converting -0 to +0 in native collections

Open source →

0.2.06 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.Deprecated

Removed deprecated .contains methods

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

Open source →

0.1.51 Dec 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Added `Array#copyWithin` - Added `String#codePointAt` - Added `String.fromCodePoint`

Open source →

0.1.427 Nov 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Added `Dict.mapPairs`

Added Dict.mapPairs

Open source →

0.1.320 Nov 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

String#contains -> `String#includes`

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

Open source →

0.1.219 Nov 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Map & Set bug fix

Map & Set bug fix

Open source →

0.1.118 Nov 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.

- Public release

Public release

Open source →

0.0.930 Oct 2014withdrawn: core-js@<3.23.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Some versions have web compatibility issues. Please, upgrade your dependencies to the actual version of core-js.