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 - 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 - 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 - 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 - 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 - 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 - 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

3.30.2 - 2023.05.07

• 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

3.30.1 - 2023.04.14

• Added a fix for a NodeJS 19.9.0 URL.canParse bug
• Compat data improvements:
  • JSON.parse source text access proposal features marked as supported from V8 ~ Chrome 114
  • ArrayBuffer.prototype.transfer and friends proposal features marked as supported from V8 ~ Chrome 114
  • URLSearchParams.prototype.size marked as supported from V8 ~ Chrome 113

3.30.0 - 2023.04.04

• Added URL.canParse method, url/763
• Set methods proposal:
  • Removed sort from Set.prototype.intersection, March 2023 TC39 meeting, proposal-set-methods/94
• Iterator Helpers proposals (sync, async):
  • Validate arguments before opening iterator, March 2023 TC39 meeting, proposal-iterator-helpers/265
• Explicit Resource Management proposals (sync, async):
  • (Async)DisposableStack.prototype.move marks the original stack as disposed, #1226
  • Some simplifications like proposal-explicit-resource-management/150
• Iterator.range proposal:
  • Moved to Stage 2, March 2023 TC39 meeting
• Decorator Metadata proposal:
  • Returned to usage Symbol.metadata, March 2023 TC39 meeting, proposal-decorator-metadata/12
• Compat data improvements:
  • URLSearchParams.prototype.size marked as supported from FF112, NodeJS 19.8 and Deno 1.32
  • Added Safari 16.4 compat data
  • Added Deno 1.32 compat data mapping
  • Added Electron 25 and updated 24 compat data mapping
  • Added Samsung Internet 21 compat data mapping
  • Added Quest Browser 26 compat data mapping
  • Updated Opera Android 74 compat data