Releases · babel/babel

v7.27.6 (2025-06-05)

🐛 Bug Fix

babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
- #17366 fix: finally causes unexpected return value (@liuxingbaoyu)
babel-generator, babel-parser, babel-types
- #17357 Ensure syntactic ordering when visiting array-type AST nodes (@JLHwung)

Committers: 3

Huáng Jùnliàng (@JLHwung)
Ingvar Stepanyan (@RReverser)
@liuxingbaoyu

@NullVoxPopuli

v7.27.5 (2025-06-03)

Thanks @NullVoxPopuli for your first PR!

🐛 Bug Fix

babel-plugin-transform-regenerator
- #17359 fix: Unexpected infinite loop with regenerator for try (@liuxingbaoyu)
Other
- #17349 Map ESLint's sourceType: commonjs to script (@JLHwung)

💅 Polish

babel-parser
- #17333 Improve using declaration errors (@JLHwung)

Committers: 4

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
@NullVoxPopuli
@liuxingbaoyu

v8.0.0-beta.0 (2025-05-30)

This release also includes all changes from v7.27.0, v7.27.1, v7.27.2, v7.27.3, and v7.27.4.

💥 Breaking Change

babel-helpers, babel-plugin-transform-regenerator, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
- #17237 [babel 8] Do not replace global regeneratorRuntime references in regenerator transform (@nicolo-ribaudo)
babel-compat-data, babel-helper-compilation-targets, babel-preset-env
- #17267 [Babel 8] Directly export the JSON files from @babel/compat-data (@nicolo-ribaudo)
babel-parser
- #17265 [babel 8] Drop CJS support from @babel/parser (@nicolo-ribaudo)
babel-generator, babel-parser, babel-plugin-proposal-pipeline-operator, babel-plugin-proposal-record-and-tuple, babel-standalone, babel-traverse
- #17242 [Babel 8]: Remove record and tuple syntax support (@JLHwung)
babel-traverse, babel-types
- #17217 Harden variable declarator validations (@JLHwung)
All packages
- #17204 [Babel 8] Bump nodejs requirements to ^20.19.0 || >= 22.12.0 (@JLHwung)
babel-helper-compilation-targets, babel-preset-env
- #17188 [Babel 8] Align esmodules: true behaviour to intersect (@JLHwung)

📢 Deprecation

babel-types
- #17133 [babel 8] Deprecate uppercase builders (@nicolo-ribaudo)

🏠 Internal

babel-traverse
- #16624 [Babel 8] Change scope.{references,uids} to Set (@liuxingbaoyu)
babel-core
- #17261 [babel 8] Remove unnecessary CJS ESM wrapper (@nicolo-ribaudo)
babel-helpers, babel-plugin-transform-react-jsx, babel-preset-env
- #17211 Babel 8 cleanup (@JLHwung)
babel-plugin-transform-block-scoping, babel-traverse, babel-types
- #17148 [Babel 8] Remove BLOCK_SCOPED_SYMBOL and NOT_LOCAL_BINDING (@liuxingbaoyu)
babel-plugin-transform-regenerator, babel-plugin-transform-typeof-symbol
- #17186 Cleanup babel 8 todo item (@JLHwung)

🏃‍♀️ Performance

babel-traverse
- #16965 [Babel 8] perf: Improve traverse performance (@liuxingbaoyu)

Committers: 12

Aryan Bharti (@woaitsAryan)
Babel Bot (@babel-bot)
Frolov Roman (@Lacsw)
Huáng Jùnliàng (@JLHwung)
Ish Chhabra (@ishchhabra)
Nicolò Ribaudo (@nicolo-ribaudo)
Vik R (@vikr01)
Vladimir Timofeev (@vovkasm)
@liuxingbaoyu
@magic-akari
_Kerman (@kermanx)
fisker Cheung (@fisker)

v7.27.4 (2025-05-30)

👓 Spec Compliance

babel-parser, babel-plugin-proposal-explicit-resource-management
- #17323 Disallow using in bare case statement (@JLHwung)

💅 Polish

babel-parser
- #17311 Improve parseExpression error messages (@JLHwung)

🔬 Output optimization

babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-async-to-generator, babel-plugin-transform-block-scoping, babel-plugin-transform-classes, babel-plugin-transform-destructuring, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
- #17287 Reduce regenerator size more (@liuxingbaoyu)
babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-async-to-generator, babel-plugin-transform-block-scoping, babel-plugin-transform-classes, babel-plugin-transform-destructuring, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs3
- #17334 Use shorter method names for regenerator context (@nicolo-ribaudo)
- #17268 Reduce regenerator helper size (@liuxingbaoyu)
babel-core, babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-async-to-generator, babel-plugin-transform-block-scoping, babel-plugin-transform-classes, babel-plugin-transform-destructuring, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime, babel-standalone
- #17238 Split regeneratorRuntime into multiple helpers (@nicolo-ribaudo)

Committers: 4

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
@liuxingbaoyu

v7.27.3 (2025-05-27)

🐛 Bug Fix

babel-generator
- #17324 Improve multiline comments handling in yield/await expression (@JLHwung)
babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
- #17328 Correctly set .displayName on GeneratorFunction (@nicolo-ribaudo)
babel-plugin-proposal-explicit-resource-management
- #17319 fix: handle shadowed binding in for using of body (@JLHwung)
- #17317 fix: support named evaluation for using declaration (@JLHwung)
babel-plugin-proposal-decorators, babel-types
- #17321 fix(converter): Remove abstract modifiers in class declaration to expression conversion (@magic-akari)
babel-helper-module-transforms, babel-plugin-proposal-explicit-resource-management, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-umd
- #17257 Preserve class id when transforming using declarations with exported class (@JLHwung)
babel-parser
- #17312 fix(parser): properly handle optional markers in generator class methods (@magic-akari)
- #17307 fix(parser): Terminate modifier parsing at newline (@magic-akari)
babel-generator, babel-parser
- #17308 Improve import phase parsing (@JLHwung)

Committers: 7

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
Vik R (@vikr01)
@liuxingbaoyu
@magic-akari
fisker Cheung (@fisker)

v7.27.2 (2025-05-06)

🐛 Bug Fix

babel-parser
- #17289 fix: @babel/parser/bin/index.js contains node: protocol require (@liuxingbaoyu)
- #17291 fix: Private class method not found when TS and estree (@liuxingbaoyu)
babel-plugin-transform-object-rest-spread
- #17281 Fix: improve object rest handling in array pattern (@JLHwung)
babel-plugin-transform-modules-commonjs, babel-template
- #17284 fix(babel-template): Properly handle empty string replacements (@magic-akari)

🏃‍♀️ Performance

babel-cli
- #17285 Enable Node compile cache for @babel/cli (@JLHwung)

Committers: 5

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
@liuxingbaoyu
@magic-akari

@kermanx

v7.27.1 (2025-04-30)

Thanks @kermanx and @woaitsAryan for your first PRs!

👓 Spec Compliance

babel-parser
- #17254 Allow using of as lexical declaration within for (@JLHwung)
- #17230 Disallow get/set in TSPropertySignature (@JLHwung)
babel-parser, babel-types
- #17193 Stricter TSImportType options parsing (@JLHwung)

🐛 Bug Fix

babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-traverse
- #17137 fix: do expressions should allow early exit (@kermanx)
babel-helper-wrap-function, babel-plugin-transform-async-to-generator
- #17251 Fix: propagate argument evaluation errors through async promise chain (@magic-akari)
babel-helper-remap-async-to-generator, babel-plugin-transform-async-to-generator
- #17231 fix apply()/call() annotated as pure (@Lacsw)
babel-helper-fixtures, babel-parser
- #17233 Create ChainExpression within TSInstantiationExpression (@JLHwung)
babel-generator, babel-parser
- #17226 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 2) (@JLHwung)
babel-parser
- #17224 Fill optional AST properties when both estree and typescript parser plugin are enabled (Part 1) (@JLHwung)
- #17080 Fix start of TSParameterProperty (@JLHwung)
babel-compat-data, babel-preset-env
- #17228 Update firefox bugfix compat data (@JLHwung)
babel-traverse
- #17156 fix: Objects and arrays with multiple references should not be evaluated (@liuxingbaoyu)
babel-generator
- #17216 Fix: support const type parameter in generator (@JLHwung)

💅 Polish

babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-decorators, babel-plugin-transform-arrow-functions, babel-plugin-transform-class-properties, babel-plugin-transform-destructuring, babel-plugin-transform-object-rest-spread, babel-plugin-transform-optional-chaining, babel-plugin-transform-parameters, babel-traverse
- #17221 Reduce generated names size for the 10th-11th (@nicolo-ribaudo)

🏠 Internal

babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
- #17263 Remove unused regenerator-runtime dep in @babel/runtime (@nicolo-ribaudo)
babel-compat-data, babel-preset-env
- #17256 Tune plugin compat data (@JLHwung)
babel-compat-data, babel-standalone
- #17236 migrate babel-compat-data build script to mjs (@JLHwung)
babel-register
- #16844 Migrate @babel/register to cts (@liuxingbaoyu)
babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
- #17205 Inline regenerator in the relevant packages (@nicolo-ribaudo)
All packages
- #17207 Enforce node protocol import (@JLHwung)

🔬 Output optimization

babel-helpers, babel-plugin-transform-modules-commonjs, babel-runtime-corejs3
- #16538 Reduce interopRequireWildcard size (@liuxingbaoyu)
babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
- #17213 Reduce regeneratorRuntime size (@liuxingbaoyu)

Committers: 9

Aryan Bharti (@woaitsAryan)
Babel Bot (@babel-bot)
Frolov Roman (@Lacsw)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
@liuxingbaoyu
@magic-akari
_Kerman (@kermanx)
fisker Cheung (@fisker)

@ishchhabra

v7.27.0 (2025-03-24)

Thanks @ishchhabra and @vovkasm for your first PRs!

👓 Spec Compliance

babel-generator, babel-parser
- #16977 Default importAttributesKeyword to with (@JLHwung)

🚀 New Feature

babel-helper-create-class-features-plugin, babel-traverse, babel-types
- #17169 Allow traverseFast to exit early (@liuxingbaoyu)
babel-parser, babel-types
- #17110 Add ImportAttributes to Standardized and move its parser test fixtures (@JLHwung)
babel-generator
- #17100 fix(babel-generator): add named export of generate function (@vovkasm)
babel-parser, babel-template
- #17149 Add allowYieldOutsideFunction to parser (@liuxingbaoyu)
babel-plugin-transform-typescript, babel-traverse
- #17102 feat: Add upToScope parameter to hasBinding (@liuxingbaoyu)
babel-parser
- #17082 Support ESTree AccessorProperty (@JLHwung)
babel-types
- #17162 feat(babel-types): Add support for BigInt literal conversion in valueToNode (@ishchhabra)

🐛 Bug Fix

babel-helper-create-class-features-plugin, babel-plugin-transform-class-properties
- #16816 fix: Class reference in type throws error (@liuxingbaoyu)
babel-traverse
- #17170 fix: Reset child scopes when scope.crawl() (@liuxingbaoyu)
babel-helpers, babel-preset-typescript, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
- #17118 Fix: align behaviour to tsc rewriteRelativeImportExtensions (@JLHwung)
babel-cli
- #17182 fix: @babel/cli generates duplicate inline source maps (@liuxingbaoyu)
babel-plugin-transform-named-capturing-groups-regex, babel-types
- #17175 Generate computed proto key (@JLHwung)

🏃‍♀️ Performance

babel-types
- #16870 perf: Improve builders of @babel/types (@liuxingbaoyu)
babel-helper-create-regexp-features-plugin
- #17176 fix: improve duplicate named groups check (@JLHwung)

Committers: 5

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Ish Chhabra (@ishchhabra)
Vladimir Timofeev (@vovkasm)
@liuxingbaoyu

v8.0.0-alpha.17 (2025-03-11)

This release also includes all changes from v7.26.10.

This release includes a fix for GHSA-968p-4wvh-cqc8, a security vulnerability which affects the .replace method of transpiled regular expressions that use named capturing groups.

💥 Breaking Change

babel-parser, babel-types
- #17139 [Babel 8] Parse TSHeritageBase.expression as an expression (@JLHwung)

Committers: 6

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
Yunyoung Jordan Choi (@jordan-choi)
@liuxingbaoyu
@mmmsssttt404

@jordan-choi

v7.26.10 (2025-03-11)

Thanks @jordan-choi and @mmmsssttt404 for your first PRs!

This release includes a fix for GHSA-968p-4wvh-cqc8, a security vulnerability which affects the .replace method of transpiled regular expressions that use named capturing groups.

👓 Spec Compliance

babel-parser
- #17159 Disallow decorator in array pattern (@JLHwung)

🐛 Bug Fix

babel-parser, babel-template
- #17164 Fix: always initialize ExportDeclaration attributes (@JLHwung)
babel-core
- #17142 fix: "Map maximum size exceeded" in deepClone (@liuxingbaoyu)
babel-parser, babel-plugin-transform-typescript
- #17154 Update typescript parser tests (@JLHwung)
babel-traverse
- #17151 fix: Should not evaluate vars in child scope (@liuxingbaoyu)
babel-generator
- #17153 fix: Correctly generate abstract override (@liuxingbaoyu)
babel-parser
- #17107 Fix source type detection when parsing TypeScript (@JLHwung)
babel-helpers, babel-runtime, babel-runtime-corejs2, babel-runtime-corejs3
- #17173 Fix processing of replacement pattern with named capture groups (@mmmsssttt404)

💅 Polish

babel-standalone
- #17158 Avoid warnings when re-bundling @babel/standalone with webpack (@liuxingbaoyu)

🏠 Internal

babel-parser
- #17160 Left-value parsing cleanup (@JLHwung)

Committers: 6

Babel Bot (@babel-bot)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
Yunyoung Jordan Choi (@jordan-choi)
@liuxingbaoyu
@mmmsssttt404

Uh oh!

Releases: babel/babel

v7.27.6

v7.27.6 (2025-06-05)

🐛 Bug Fix

Committers: 3

Uh oh!

v7.27.5

v7.27.5 (2025-06-03)

🐛 Bug Fix

💅 Polish

Committers: 4

Contributors

Uh oh!

v8.0.0-beta.0

v8.0.0-beta.0 (2025-05-30)

💥 Breaking Change

📢 Deprecation

🏠 Internal

🏃‍♀️ Performance

Committers: 12

Uh oh!

v7.27.4

v7.27.4 (2025-05-30)

👓 Spec Compliance

💅 Polish

🔬 Output optimization

Committers: 4

Uh oh!

v7.27.3

v7.27.3 (2025-05-27)

🐛 Bug Fix

Committers: 7

Uh oh!

v7.27.2

v7.27.2 (2025-05-06)

🐛 Bug Fix

🏃‍♀️ Performance

Committers: 5

Uh oh!

v7.27.1

v7.27.1 (2025-04-30)

👓 Spec Compliance

🐛 Bug Fix

💅 Polish

🏠 Internal

🔬 Output optimization

Committers: 9

Contributors

Uh oh!

v7.27.0

v7.27.0 (2025-03-24)

👓 Spec Compliance

🚀 New Feature

🐛 Bug Fix

🏃‍♀️ Performance

Committers: 5

Contributors

Uh oh!

v8.0.0-alpha.17

v8.0.0-alpha.17 (2025-03-11)

💥 Breaking Change

Committers: 6

Uh oh!

v7.26.10

v7.26.10 (2025-03-11)

👓 Spec Compliance

🐛 Bug Fix

💅 Polish

🏠 Internal

Committers: 6

Contributors

Uh oh!