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Changelog

core-js

Standard Library

zloirock/core-js·

25k1.7kJavaScriptMIT

ecmascript-proposalses2015es6es7esnextjavascript+6

Last updated about 2 months ago

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NewJune 9, 2025

3.43.0 - 2025.06.09

Changes v3.42.0...v3.43.0 (139 commits)
Explicit Resource Management proposals:
- Built-ins:
  - Symbol.dispose
  - Symbol.asyncDispose
  - SuppressedError
  - DisposableStack
    - DisposableStack.prototype.dispose
    - DisposableStack.prototype.use
    - DisposableStack.prototype.adopt
    - DisposableStack.prototype.defer
    - DisposableStack.prototype.move
    - DisposableStack.prototype[@@dispose]
  - AsyncDisposableStack
    - AsyncDisposableStack.prototype.disposeAsync
    - AsyncDisposableStack.prototype.use
    - AsyncDisposableStack.prototype.adopt
    - AsyncDisposableStack.prototype.defer
    - AsyncDisposableStack.prototype.move
    - AsyncDisposableStack.prototype[@@asyncDispose]
  - Iterator.prototype[@@dispose]
  - AsyncIterator.prototype[@@asyncDispose]
- Moved to stable ES, May 2025 TC39 meeting
- Added es. namespace module, /es/ and /stable/ namespaces entries
Array.fromAsync proposal:
- Built-ins:
  - Array.fromAsync
- Moved to stable ES, May 2025 TC39 meeting
- Added es. namespace module, /es/ and /stable/ namespaces entries
Error.isError proposal:
- Built-ins:
  - Error.isError
- Moved to stable ES, May 2025 TC39 meeting
- Added es. namespace module, /es/ and /stable/ namespaces entries
Added Joint iteration stage 2.7 proposal:
- Added built-ins:
  - Iterator.zip
  - Iterator.zipKeyed
Added Iterator chunking stage 2 proposal:
- Added built-ins:
  - Iterator.prototype.chunks
  - Iterator.prototype.windows
Number.prototype.clamp proposal:
- Built-ins:
  - Number.prototype.clamp
- Moved to stage 2, May 2025 TC39 meeting
- Math.clamp was replaced with Number.prototype.clamp
- Removed a RangeError if min <= max or +0 min and -0 max, tc39/proposal-math-clamp/#22
Always check regular expression flags by flags getter PR. Native methods are not fixed, only own implementation updated for:
- RegExp.prototype[@@match]
- RegExp.prototype[@@replace]
Improved handling of RegExp flags in polyfills of some methods in engines without proper support of RegExp.prototype.flags and without polyfill of this getter
Added feature detection for a WebKit bug that occurs when this is updated while Set.prototype.difference is being executed
Added feature detection for a WebKit bug that occurs when iterator record of a set-like object isn't called before cloning this in the following methods:
- Set.prototype.symmetricDifference
- Set.prototype.union
Added feature detection for a bug in V8 ~ Chromium < 126. Following methods should throw an error on invalid iterator:
- Iterator.prototype.drop
- Iterator.prototype.filter
- Iterator.prototype.flatMap
- Iterator.prototype.map
Added feature detection for a WebKit bug: incorrect exception thrown by Iterator.from when underlying iterator's return method is null
Added feature detection for a FF bug: incorrect exception thrown by Array.prototype.with when index coercion fails
Added feature detection for a WebKit bug: TypedArray.prototype.with should truncate negative fractional index to zero, but instead throws an error
Worked around a bug of many different tools (example) with incorrect transforming and breaking JS syntax on getting a method from a number literal
Fixed deoptimization of the Promise polyfill in the pure version
Added some missed dependencies to /iterator/flat-map entries
Some other minor fixes and improvements
Compat data improvements:
- Added Deno 2.3 and Deno 2.3.2 compat data mapping
- Updated Electron 37 compat data mapping
- Added Opera Android 90 compat data mapping
- Error.isError marked not supported in Node because of a bug
- Set.prototype.difference marked as not supported in Safari and supported only from Bun 1.2.5 because of a bug
- Set.prototype.{ symmetricDifference, union } marked as not supported in Safari and supported only from Bun 1.2.5 because of a bug
- Iterator.from marked as not supported in Safari and supported only from Bun 1.2.5 because of a bug
- Iterators closing on early errors in Iterator helpers marked as implemented from FF141
- Array.prototype.with marked as supported only from FF140 because it throws an incorrect exception when index coercion fails
- TypedArray.prototype.with marked as unsupported in Bun and Safari because it should truncate negative fractional index to zero, but instead throws an error
- DisposableStack and AsyncDisposableStack marked as shipped in FF141 (SuppressedError has a bug)
- AsyncDisposableStack bugs marked as fixed in Deno 2.3.2
- SuppressedError bugs (extra arguments support and arity) marked as fixed in Bun 1.2.15