Array grouping proposal:
- Methods:
  - Object.groupBy
  - Map.groupBy
- Moved to stable ES, November 2023 TC39 meeting
- Added es. namespace modules, /es/ and /stable/ namespaces entries
Promise.withResolvers proposal:
- Method:
  - Promise.withResolvers
- Moved to stable ES, November 2023 TC39 meeting
- Added es. namespace module, /es/ and /stable/ namespaces entries
Fixed a web incompatibility issue of Iterator helpers proposal, proposal-iterator-helpers/287 and some following changes, November 2023 TC39 meeting
Added Uint8Array to / from base64 and hex stage 2 proposal:
- Methods:
  - Uint8Array.fromBase64
  - Uint8Array.fromHex
  - Uint8Array.prototype.toBase64
  - Uint8Array.prototype.toHex
Relaxed some specific cases of Number.fromString validation before clarification of proposal-number-fromstring/24
Fixed @@toStringTag property descriptors on DOM collections, #1312
Fixed the order of arguments validation in Array iteration methods, #1313
Some minor atob / btoa improvements
Compat data improvements:
- Promise.withResolvers marked as shipped from FF121

3.33.3

Diff

zloirock

published 3.33.3 • last year

Changelog

Source

3.33.3 - 2023.11.20

Fixed an issue getting the global object on Duktape, #1303
Avoid sharing internal [[DedentMap]] from String.dedent proposal between core-js instances before stabilization of the proposal
Some internal untangling
Compat data improvements:
- Added Deno 1.38 compat data mapping
- Array.fromAsync marked as supported from Deno 1.38
- Symbol.{ dispose, asyncDispose } marked as supported from Deno 1.38
- Added Opera Android 79 compat data mapping
- Added Oculus Quest Browser 30 compat data mapping
- Updated Electron 28 and 29 compat data mapping

3.33.2

Diff

zloirock

published 3.33.2 • last year

Changelog

Source

3.33.2 - 2023.10.31

Simplified structuredClone polyfill, avoided second tree pass in cases of transferring
Added support of SuppressedError to structuredClone polyfill
Removed unspecified unnecessary ArrayBuffer and DataView dependencies of structuredClone lack of which could cause errors in some entries in IE10-
Fixed handling of fractional number part in Number.fromString
Compat data improvements:
- URL.canParse marked as supported from Chromium 120
- Updated Opera Android 78 compat data mapping
- Added Electron 29 compat data mapping

3.33.1

Diff

zloirock

published 3.33.1 • last year

Changelog

Source

3.33.1 - 2023.10.20

Added one more workaround of possible error with Symbol polyfill on global object, #1289
Directly specified type: commonjs in package.json of all packages to avoid potential breakage in future Node versions, see this issue
Prevented potential issue with lack of some dependencies after automatic optimization polyfills of some methods in the pure version
Some minor internal fixes and optimizations
Compat data improvements:
- String.prototype.{ isWellFormed, toWellFormed } marked as supported from FF119
- Added React Native 0.73 Hermes compat data, mainly fixes of some issues
- Added NodeJS 21.0 compat data mapping

3.33.0

Diff

zloirock

published 3.33.0 • last year

Changelog

Source

3.33.0 - 2023.10.02

Re-introduced RegExp escaping stage 2 proposal, September 2023 TC39 meeting:
- Added RegExp.escape method with the new set of symbols for escaping
- Some years ago, it was presented in core-js, but it was removed after rejecting the old version of this proposal
Added ArrayBuffer.prototype.{ transfer, transferToFixedLength } and support transferring of ArrayBuffers via structuredClone to engines with MessageChannel
Optimized Math.f16round polyfill
Fixed some conversion cases of Math.f16round and DataView.prototype.{ getFloat16, setFloat16 }
Fully forced polyfilling of the TC39 Observable proposal because of incompatibility with the new WHATWG Observable proposal
Added an extra workaround of errors with exotic environment objects in Symbol polyfill, #1289
Some minor fixes and stylistic changes
Compat data improvements:
- V8 unshipped Iterator helpers because of some Web compatibility issues
- Promise.withResolvers marked as supported from V8 ~ Chrome 119
- Array grouping proposal features marked as supported from FF119
- value argument of URLSearchParams.prototype.{ has, delete } marked as properly supported from V8 ~ Chrome 118
- URL.canParse and URLSearchParams.prototype.size marked as supported from Bun 1.0.2
- Added Deno 1.37 compat data mapping
- Added Electron 28 compat data mapping
- Added Opera Android 78 compat data mapping

3.32.2

Diff

zloirock

published 3.32.2 • last year

Changelog

Source

3.32.2 - 2023.09.07

Fixed structuredClone feature detection core-js@3.32.1 bug, #1288
Added a workaround of old WebKit + eval bug, #1287
Compat data improvements:
- Added Samsung Internet 23 compat data mapping
- Added Quest Browser 29 compat data mapping

3.32.1

Diff

zloirock

published 3.32.1 • last year

Changelog

Source

3.32.1 - 2023.08.19

Fixed some cases of IEEE754 rounding, #1279, thanks @petamoriken
Prevented injection process polyfill to core-js via some bundlers or esm.sh, #1277
Some minor fixes and stylistic changes
Compat data improvements:
- Promise.withResolvers marked as supported from Bun 0.7.1
- Added Opera Android 77 compat data mapping
- Updated Electron 27 compat data mapping

3.32.0

Diff

zloirock

published 3.32.0 • last year

Changelog

Source

3.32.0 - 2023.07.28

Array grouping proposal, July 2023 TC39 meeting updates:
- Moved back to stage 3
- Added /actual/ namespaces entries, unconditional forced replacement changed to feature detection
Promise.withResolvers proposal, July 2023 TC39 meeting updates:
- Moved to stage 3
- Added /actual/ namespaces entries, unconditional forced replacement changed to feature detection
Set methods stage 3 proposal, July 2023 TC39 meeting updates:
- Throw on negative Set sizes, proposal-set-methods/88
- Removed IsCallable check in GetKeysIterator, proposal-set-methods/101
Iterator Helpers stage 3 proposal:
- Avoid creating observable String wrapper objects, July 2023 TC39 meeting update, proposal-iterator-helpers/281
- Iterator is not constructible from the active function object (works as an abstract class)
Async explicit resource management:
- Moved back into the initial proposal -> moved to stage 3, proposal-explicit-resource-management/154
- Added /actual/ namespace entries, unconditional forced replacement changed to feature detection
- Ignore return value of [@@dispose]() method when hint is async-dispose, proposal-explicit-resource-management/180
- Added ticks for empty resources, proposal-explicit-resource-management/163
Added some methods from Float16Array stage 3 proposal:
- There are some reason why I don't want to add Float16Array right now, however, make sense to add some methods from this proposal.
- Methods:
  - Math.f16round
  - DataView.prototype.getFloat16
  - DataView.prototype.setFloat16
Added DataView get / set Uint8Clamped methods stage 1 proposal:
- Methods:
  - DataView.prototype.getUint8Clamped
  - DataView.prototype.setUint8Clamped
Used strict mode in some missed cases, #1269
Fixed a Chromium 117 bug in value argument of URLSearchParams.prototype.{ has, delete }
Fixed early WebKit ~ Safari 17.0 beta Set methods implementation by the actual spec
Fixed incorrect Symbol.{ dispose, asyncDispose } descriptors from NodeJS 20.4 / transpilers helpers / userland code
Fixed forced polyfilling of some iterator helpers that should return wrapped iterator in the pure version
Fixed and exposed AsyncIteratorPrototype core-js/configurator option, #1268
Compat data improvements:
- Sync Iterator helpers proposal features marked as supported from V8 ~ Chrome 117
- Array grouping proposal features marked as supported from V8 ~ Chrome 117
- Mark Symbol.{ dispose, asyncDispose } as supported from NodeJS 20.5.0 (as mentioned above, NodeJS 20.4.0 add it, but with incorrect descriptors)
- Added Electron 27 compat data mapping

3.31.1

Diff

zloirock

published 3.31.1 • last year

Changelog

Source

3.31.1 - 2023.07.06

Fixed a structuredClone bug with cloning views of transferred buffers, #1265
Fixed the order of arguments validation in DataView methods
Allowed cloning of Float16Array in structuredClone
Compat data improvements:
- Set methods proposal marked as supported from Safari 17.0
- New URL features: URL.canParse, URLSearchParams.prototype.size and value argument of URLSearchParams.prototype.{ has, delete } marked as supported from Safari 17.0
- value argument of URLSearchParams.prototype.{ has, delete } marked as supported from Deno 1.35
- AggregateError and well-formed JSON.stringify marked as supported React Native 0.72 Hermes
- Added Deno 1.35 compat data mapping
- Added Quest Browser 28 compat data mapping
- Added missing NodeJS 12.16-12.22 compat data mapping
- Updated Opera Android 76 compat data mapping

3.31.0

Diff

zloirock

published 3.31.0 • last year

Changelog

Source

3.31.0 - 2023.06.12

Well-formed unicode strings proposal:
- Methods:
  - String.prototype.isWellFormed method
  - String.prototype.toWellFormed method
- Moved to stable ES, May 2023 TC39 meeting
- Added es. namespace modules, /es/ and /stable/ namespaces entries
Array grouping proposal, May 2023 TC39 meeting updates:
- Because of the web compat issue, moved from prototype to static methods. Added:
  - Object.groupBy method
  - Map.groupBy method (with the actual semantic - with a minor difference it was present in the collections methods stage 1 proposal)
- Demoted to stage 2
Decorator Metadata proposal, May 2023 TC39 meeting updates:
- Moved to stage 3
- Added Function.prototype[Symbol.metadata] (=== null)
- Added /actual/ entries
Iterator Helpers stage 3 proposal:
- Changed Symbol.iterator fallback from callable check to undefined / null check, May 2023 TC39 meeting, proposal-iterator-helpers/272
- Removed IsCallable check on NextMethod, deferring errors to Call site, May 2023 TC39 meeting, proposal-iterator-helpers/274
Added Promise.withResolvers stage 2 proposal:
- Promise.withResolvers method
Symbol predicates stage 2 proposal:
- The methods renamed to end with Symbol, May 2023 TC39 meeting:
  - Symbol.isRegistered -> Symbol.isRegisteredSymbol method
  - Symbol.isWellKnown -> Symbol.isWellKnownSymbol method
Added value argument of URLSearchParams.prototype.{ has, delete }, url/735
Fixed some cases of increasing buffer size in ArrayBuffer.prototype.{ transfer, transferToFixedLength } polyfills
Fixed awaiting async AsyncDisposableStack.prototype.adopt callback, #1258
Fixed URLSearchParams#size in ES3 engines (IE8-)
Added a workaround in Object.{ entries, values } for some IE versions bug with invisible integer keys on null-prototype objects
Added TypeScript definitions to core-js-compat, #1235, thanks @susnux
Compat data improvements:
- Set.prototype.difference that was missed in Bun because of a bug added in 0.6.0
- Array.prototype.{ group, groupToMap } marked as no longer supported in WebKit runtimes because of the mentioned above web compat issue. For example, it's disabled from Bun 0.6.2
- Methods from the change Array by copy proposal marked as supported from FF115
- Array.fromAsync marked as supported from FF115
- URL.canParse marked as supported from FF115
- value argument of URLSearchParams.prototype.{ has, delete } marked as supported from NodeJS 20.2.0 and FF115
- Added Deno 1.34 compat data mapping
- Added Electron 26 compat data mapping
- Added Samsung Internet 22 compat data mapping
- Added Opera Android 75 and 76 compat data mapping
- Added Quest Browser 27 compat data mapping

…