v3.38.1

Compare Source

• Changes v3.38.0...v3.38.1
• Fixed some cases of URLSearchParams percent decoding, #​1357, #​1361, thanks @​slowcheetah
• Some stylistic changes and minor optimizations
• Compat data improvements:
  • Iterator helpers proposal methods marked as shipped from FF131
  • Math.f16round and DataView.prototype.{ getFloat16, setFloat16 } marked as shipped from Bun 1.1.23
  • RegExp.escape marked as shipped from Bun 1.1.22
  • Promise.try marked as shipped from Bun 1.1.22
  • Uint8Array to / from base64 and hex proposal methods marked as shipped from Bun 1.1.22
  • Added Hermes 0.13 compat data, similar to React Native 0.75 Hermes
  • Added Opera Android 84 compat data mapping

v3.38.0

Compare Source

• Changes v3.37.1...v3.38.0
• RegExp.escape proposal:
  • Built-ins:
    • RegExp.escape
  • Moved to stage 3, June 2024 and July 2024 TC39 meetings
  • Updated the way of escaping, regex-escaping/77
  • Throw an error on non-strings, regex-escaping/58
  • Added /actual/ namespace entries, unconditional forced replacement changed to feature detection
• Promise.try proposal:
  • Built-ins:
    • Promise.try
  • Moved to stage 3, June 2024 TC39 meeting
  • Added /actual/ namespace entries, unconditional forced replacement changed to feature detection
• Uint8Array to / from base64 and hex stage 3 proposal:
  • Built-ins:
    • Uint8Array.fromBase64
    • Uint8Array.fromHex
    • Uint8Array.prototype.setFromBase64
    • Uint8Array.prototype.setFromHex
    • Uint8Array.prototype.toBase64
    • Uint8Array.prototype.toHex
  • Added Uint8Array.prototype.{ setFromBase64, setFromHex } methods
  • Added Uint8Array.fromBase64 and Uint8Array.prototype.setFromBase64 lastChunkHandling option, proposal-arraybuffer-base64/33
  • Added Uint8Array.prototype.toBase64 omitPadding option, proposal-arraybuffer-base64/60
  • Added throwing a TypeError on arrays backed by detached buffers
  • Unconditional forced replacement changed to feature detection
• Fixed RegExp named capture groups polyfill in combination with non-capturing groups, #​1352, thanks @​Ulop
• Improved some cases of environment detection
• Uses process.getBuiltinModule for getting built-in NodeJS modules where it's available
• Uses https instead of http in URL constructor feature detection to avoid extra notifications from some overly vigilant security scanners, #​1345
• Some minor optimizations
• Updated browserslist in core-js-compat dependencies that fixes an upstream issue with incorrect interpretation of some browserslist queries, #​1344, browserslist/829, browserslist/836
• Compat data improvements:
  • Added Safari 18.0 compat data:
    • Fixed Object.groupBy and Map.groupBy to work for non-objects
    • Fixed throwing a RangeError if Set methods are called on an object with negative size property
    • Fixed Set.prototype.symmetricDifference to call this.has in each iteration
    • Fixed Array.fromAsync to not call the Array constructor twice
    • Added URL.parse
  • Math.f16round and DataView.prototype.{ getFloat16, setFloat16 } marked as shipped from FF129
  • Symbol.asyncDispose added and marked as supported from V8 ~ Chromium 127
  • Promise.try added and marked as supported from V8 ~ Chromium 128
  • Added Deno 1.44 and 1.45 compat data mapping
  • self descriptor is broken in Deno 1.45.3 (again)
  • Added Electron 32 and 33 compat data mapping
  • Added Opera Android 83 compat data mapping
  • Added Samsung Internet 27 compat data mapping
  • Added Oculus Quest Browser 34 compat data mapping

v3.37.1

Compare Source

• Changes v3.37.0...v3.37.1
• Fixed URL.parse feature detection for some specific cases
• Compat data improvements:
  • Set methods proposal added and marked as supported from FF 127
  • Symbol.dispose added and marked as supported from V8 ~ Chromium 125
  • Math.f16round and DataView.prototype.{ getFloat16, setFloat16 } added and marked as supported from Deno 1.43
  • URL.parse added and marked as supported from Chromium 126
  • URL.parse added and marked as supported from NodeJS 22.0
  • URL.parse added and marked as supported from Deno 1.43
  • Added Rhino 1.7.15 compat data, many features marked as supported
  • Added NodeJS 22.0 compat data mapping
  • Added Deno 1.43 compat data mapping
  • Added Electron 31 compat data mapping
  • Updated Opera Android 82 compat data mapping
  • Added Samsung Internet 26 compat data mapping
  • Added Oculus Quest Browser 33 compat data mapping

v3.37.0

Compare Source

• Changes v3.36.1...v3.37.0
• New Set methods proposal:
  • Built-ins:
    • Set.prototype.intersection
    • Set.prototype.union
    • Set.prototype.difference
    • Set.prototype.symmetricDifference
    • Set.prototype.isSubsetOf
    • Set.prototype.isSupersetOf
    • Set.prototype.isDisjointFrom
  • Moved to stable ES, April 2024 TC39 meeting
  • Added es. namespace modules, /es/ and /stable/ namespaces entries
• Explicit Resource Management stage 3 proposal
  • Some minor updates like explicit-resource-management/217
• Added Math.sumPrecise stage 2.7 proposal:
  • Built-ins:
    • Math.sumPrecise
• Promise.try proposal:
  • Built-ins:
    • Promise.try
  • Added optional arguments support, promise-try/16
  • Moved to stage 2.7, April 2024 TC39 meeting
• RegExp.escape stage 2 proposal:
  • Moved to hex-escape semantics, regex-escaping/67
    • It's not the final change of the way of escaping, waiting for regex-escaping/77 soon
• Pattern matching stage 1 proposal:
  • Built-ins:
    • Symbol.customMatcher
  • Once again, the used well-known symbol was renamed
  • Added new entries for that
• Added Extractors stage 1 proposal:
  • Built-ins:
    • Symbol.customMatcher
  • Since the Symbol.customMatcher well-known symbol from the pattern matching proposal is also used in the exactors proposal, added an entry also for this proposal
• Added URL.parse, url/825
• Engines bugs fixes:
  • Added a fix of Safari { Object, Map }.groupBy bug that does not support iterable primitives
  • Added a fix of Safari bug with double call of constructor in Array.fromAsync
• Compat data improvements:
  • URL.parse added and marked as supported from FF 126
  • URL.parse added and marked as supported from Bun 1.1.4
  • URL.canParse fixed and marked as supported from Bun 1.1.0
  • New Set methods fixed in JavaScriptCore and marked as supported from Bun 1.1.1
  • Added Opera Android 82 compat data mapping

v3.36.1

Compare Source

• Changes v3.36.0...v3.36.1
• Fixed some validation cases in Object.setPrototypeOf, #​1329, thanks @​minseok-choe
• Fixed the order of validations in Array.from, #​1331, thanks @​minseok-choe
• Added a fix of Bun queueMicrotask arity
• Added a fix of Bun URL.canParse arity
• Added a fix of Bun SuppressedError extra arguments support and arity
• Compat data improvements:
  • value argument of URLSearchParams.prototype.{ has, delete } marked as supported from Bun 1.0.31
  • Added React Native 0.74 Hermes compat data, Array.prototype.{ toSpliced, toReversed, with } and atob marked as supported
  • Added Deno 1.41.3 compat data mapping
  • Added Opera Android 81 compat data mapping
  • Added Samsung Internet 25 compat data mapping
  • Added Oculus Quest Browser 32 compat data mapping
  • Updated Electron 30 compat data mapping

v3.36.0

Compare Source

• ArrayBuffer.prototype.transfer and friends proposal:
  • Built-ins:
    • ArrayBuffer.prototype.detached
    • ArrayBuffer.prototype.transfer
    • ArrayBuffer.prototype.transferToFixedLength
  • Moved to stable ES, Febrary 2024 TC39 meeting
  • Added es. namespace modules, /es/ and /stable/ namespaces entries
• Uint8Array to / from base64 and hex proposal:
  • Methods:
    • Uint8Array.fromBase64
    • Uint8Array.fromHex
    • Uint8Array.prototype.toBase64
    • Uint8Array.prototype.toHex
  • Moved to stage 3, Febrary 2024 TC39 meeting
  • Added /actual/ namespace entries
  • Skipped adding new methods of writing to existing arrays to clarification some moments
• Promise.try proposal has been resurrected and moved to stage 2, Febrary 2024 TC39 meeting
• Added an entry point for the new TC39 proposals stage - core-js/stage/2.7 - still empty
• Fixed regression in Set.prototype.intersection feature detection
• Fixed a missed check in Array.prototype.{ indexOf, lastIndexOf, includes }, #​1325, thanks @​minseok-choe
• Fixed a missed check in Array.prototype.{ reduce, reduceRight }, #​1327, thanks @​minseok-choe
• Fixed Array.from and some other methods with proxy targets, #​1322, thanks @​minseok-choe
• Fixed dependencies loading for modules from ArrayBuffer.prototype.transfer and friends proposal in some specific cases in IE10-
• Dropped context workaround from collection static methods entries since with current methods semantic it's no longer required
• Added instance methods polyfills to entries of collections static methods that produce collection instances
• Added missed Date.prototype.toJSON to JSON.stringify entries dependencies
• Added debugging info in some missed cases
• Compat data improvements:
  • { Map, Object }.groupBy, Promise.withResolvers, ArrayBuffer.prototype.transfer and friends marked as supported from Safari 17.4
  • New Set methods fixed and marked as supported from V8 ~ Chrome 123
  • Added Deno 1.40 compat data mapping
  • Symbol.metadata marked as supported from Deno 1.40.4
  • Updated Electron 30 compat data mapping

v3.35.1

Compare Source

• Fixed internal ToLength operation with bigints, #​1318
• Removed significant redundant code from String#split polyfill
• Fixed setting names of methods with symbol keys in some old engines
• Minor fix of prototype methods export logic in the pure version
• Compat data improvements:
  • Iterator helpers proposal methods marked as supported from V8 ~ Chrome 122
  • Note that V8 ~ Chrome 122 add Set methods, but they have a bug similar to Safari
  • self marked as fixed from Bun 1.0.22
  • SuppressedError and Symbol.{ dispose , asyncDispose } marked as supported from Bun 1.0.23
  • Added Oculus Quest Browser 31 compat data mapping
  • Updated Electron 29 and added Electron 30 compat data mapping

v3.35.0

Compare Source

• { Map, Set, WeakMap, WeakSet }.{ from, of } became non-generic, following this and some other notes. Now they can be invoked without this, but no longer return subclass instances
• Fixed handling some cases of non-enumerable symbol keys from Symbol polyfill
• Removed unneeded NodeJS domains-related logic from queueMicrotask polyfill
• Fixed subclassing of wrapped ArrayBuffer
• Refactoring, many different minor optimizations
• Compat data improvements:
  • Array.fromAsync marked as supported from V8 ~ Chrome 121
  • It seems that the ancient Array.prototype.push bug is fixed in V8 ~ Chrome 122 (Hallelujah!)
  • ArrayBuffer.prototype.transfer and friends proposal features marked as supported from FF 122 and Bun 1.0.19
  • Object.groupBy and Map.groupBy marked as supported from Bun 1.0.19
  • Since Iterator helpers proposal methods are still not disabled in Deno, the web compatibility issue why it was disabled in Chromium makes no sense for Deno and fixed in the spec, they marked as supported from Deno 1.37
  • Added Opera Android 80 and updated Opera Android 79 compat data mapping
  • Added Samsung Internet 24 compat data mapping

v3.34.0

Compare Source

• 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

v3.33.3

Compare Source

• 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

v3.33.2

Compare Source

• 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

v3.33.1

Compare Source

• 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

v3.33.0

Compare Source

• 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

v3.32.2

Compare Source

• Fixed structuredClone feature detection [email protected] 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

v3.32.1

Compare Source

• 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

v3.32.0

Compare Source

• 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

v3.31.1

Compare Source

• 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

v3.31.0

Compare Source

• 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

v3.30.2

Compare Source

• Added a fix for a NodeJS 20.0.0 bug with cloning File via structuredClone
• Added protection from Terser unsafe String optimization, #​1242
• Added a workaround for getting proper global object in Figma plugins, #​1231
• Compat data improvements:
  • Added NodeJS 20.0 compat data mapping
  • Added Deno 1.33 compat data mapping
  • URL.canParse marked as supported (fixed) from NodeJS 20.1.0 and Deno 1.33.2