v8.0.0-alpha.0

Super early pre-release of Babel 8 :)

It's currently known to not work with:

• @babel/cli - see #15803
• babel-loader - see #15804

It is known to work with:

• @rollup/plugin-babel

peerDependencies are all incorrect, so use the npm flag --legacy-peer-deps if you want to test it.

For the full Babel 8 migration guide, see https://next.babeljs.io/docs/v8-migration

v8.0.0-alpha.0 (2023-07-20)

👓 Spec Compliance

• babel-parser
  • #12451 [babel 8] Report a SyntaxError for } and > in JSX text (@nicolo-ribaudo)
  • #12447 [babel 8] Disallow sequence expressions in JSX expression containers (@nicolo-ribaudo)

💥 Breaking Change

• Other
  • #15763 [babel 8] Bump eslint-parser/plugin eslint requirements (@JLHwung)
  • #13921 [babel 8] Align allow* parser options with ESLint behavior (@nicolo-ribaudo)
• All packages
  • #15585 [babel 8] Require Node.js ^16.20.0 || ^18.16.0 || >=20.0.0 (@nicolo-ribaudo)
  • #14013 [babel 8] Add "exports" to every package (@nicolo-ribaudo)
• babel-plugin-proposal-decorators, babel-plugin-proposal-pipeline-operator, babel-plugin-transform-class-properties
  • #15676 [babel 8] Only support legacy and 2023-05 decorators (@nicolo-ribaudo)
• babel-core, babel-helper-create-class-features-plugin, babel-plugin-transform-arrow-functions, babel-plugin-transform-computed-properties, babel-plugin-transform-for-of, babel-plugin-transform-regenerator, babel-plugin-transform-unicode-escapes, babel-preset-env, babel-traverse, babel-types
  • #15576 [babel 8] Other Babel 8 misc changes (@nicolo-ribaudo)
• babel-core, babel-helper-builder-binary-assignment-operator-visitor, babel-helper-create-class-features-plugin, babel-helper-create-regexp-features-plugin, babel-helper-environment-visitor, babel-helper-member-expression-to-functions, babel-helper-module-transforms, babel-helper-plugin-utils, babel-helper-replace-supers, babel-helper-simple-access, babel-helper-string-parser, babel-helper-transform-fixture-test-runner, babel-helpers, babel-plugin-transform-modules-commonjs, babel-preset-env
  • #15550 More misc Babel 8 little changes (@nicolo-ribaudo)
• babel-cli, babel-compat-data, babel-core, babel-helper-create-class-features-plugin, babel-helper-environment-visitor, babel-helper-replace-supers, babel-helpers, babel-parser, babel-plugin-transform-for-of, babel-plugin-transform-react-jsx, babel-preset-env, babel-traverse, babel-types
  • #15068 Babel 8 misc changes (@JLHwung)
• babel-types
  • #15527 [babel 8] Remove builders present only for backwards-compatibility (@nicolo-ribaudo)
  • #14464 [babel 8] Remove selfClosing from jsxElement builder (@wjw99830)
• babel-core, babel-plugin-syntax-flow, babel-plugin-syntax-jsx, babel-plugin-syntax-typescript, babel-plugin-transform-parameters, babel-plugin-transform-react-jsx-development, babel-plugin-transform-spread, babel-plugin-transform-typescript, babel-preset-flow, babel-preset-typescript, babel-standalone
  • #14955 [babel 8] Better file ext handling for TS and Flow presets (@nicolo-ribaudo)
• babel-traverse
  • #15288 [babel 8] Remove block argument from Scope#rename (@nicolo-ribaudo)
• babel-generator, babel-helper-compilation-targets, babel-preset-env, babel-preset-flow, babel-types
  • #14179 Bundle most packages in Babel 8 (@JLHwung)
• babel-generator, babel-helper-builder-binary-assignment-operator-visitor, babel-helper-create-class-features-plugin, babel-helper-member-expression-to-functions, babel-helper-skip-transparent-expression-wrappers, babel-plugin-proposal-function-bind, babel-plugin-proposal-logical-assignment-operators, babel-plugin-proposal-optional-chaining, babel-plugin-proposal-partial-application, babel-plugin-transform-proto-to-assign, babel-plugin-transform-spread, babel-traverse, babel-types
  • #14750 Remove Super from Expression alias (@JLHwung)
• babel-core, babel-generator, babel-helper-create-class-features-plugin, babel-plugin-proposal-class-properties, babel-plugin-proposal-decorators, babel-plugin-proposal-pipeline-operator, babel-plugin-syntax-decorators, babel-plugin-transform-function-name, babel-plugin-transform-typescript, babel-standalone
  • #12712 [babel 8] Remove support for the 2018-09 decorators proposal (@nicolo-ribaudo)
• babel-core, babel-helper-module-imports, babel-helper-transform-fixture-test-runner, babel-node, babel-plugin-proposal-class-static-block, babel-plugin-syntax-decorators, babel-plugin-transform-modules-commonjs, babel-plugin-transform-runtime, babel-standalone
  • #12695 [babel 8] Disallow synchronous usage of babel.* callback methods (@JLHwung)
• babel-generator, babel-types
  • #14465 [babel 8] ObjectTypeAnnotation fields must always be arrays (@danez)
  • #12361 [babel 8] Remove the Noop node type (@sidntrivedi012)
• babel-generator, babel-parser, babel-types
  • #13709 [babel 8] fix properties name for function-like TS nodes (@sosukesuzuki)
  • #12829 [babel 8] Use an identifier for TSTypeParameter.name (@fedeci)
• babel-node, babel-register
  • #14025 [babel 8] Move @babel/register transform to a separate worker (@nicolo-ribaudo)
• babel-parser
  • #13919 Improve template tokenizing (@JLHwung)
  • #13752 [babel 8] Materialize ESTree's classFeatures option (@nicolo-ribaudo)
• babel-plugin-transform-react-constant-elements, babel-preset-env
  • #13866 [babel 8] Enable preset-env bugfixes by default (@JLHwung)
• babel-core
  • #13199 [babel 8] Move ESLint parsing to a Worker (@nicolo-ribaudo)
• babel-generator, babel-parser
  • #13308 [Babel 8]: remove module attributes parser/generator support (@JLHwung)
  • #12608 [babel 8] Don't create TSParenthesizedType nodes by default (@JLHwung)
• babel-plugin-transform-block-scoping, babel-traverse
  • #13291 [babel 8] Do not skip requeued paths (@JLHwung)
• babel-cli, babel-core, babel-helper-module-transforms, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd
  • #12724 [babel 8] Remove module-specific options from @babel/core (@nicolo-ribaudo)
• babel-preset-react
  • #12741 [babel 8] Type checking preset-react options (@JLHwung)
• babel-preset-flow
  • #12751 [babel 8] type checking preset-flow options (@JLHwung)
• babel-core, babel-helper-compilation-targets, babel-plugin-proposal-async-generator-functions, babel-plugin-proposal-class-properties, babel-plugin-proposal-decorators, babel-plugin-proposal-object-rest-spread, babel-plugin-transform-classes, babel-plugin-transform-flow-comments, babel-plugin-transform-flow-strip-types, babel-plugin-transform-function-name, babel-plugin-transform-modules-commonjs, babel-plugin-transform-parameters, babel-plugin-transform-react-constant-elements, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-preset-env, babel-standalone
  • #12989 breaking: fallback targets to "defaults, not ie 11" (@JLHwung)...

7.22.9

v7.22.9 (2023-07-12)

🐛 Bug Fix

• babel-plugin-transform-typescript
  • #15774 fix: Infinity in enums (@liuxingbaoyu)
• babel-helper-module-transforms, babel-helper-remap-async-to-generator, babel-helper-replace-supers, babel-helper-wrap-function
  • #15771 Simplify helper dependencies (@JLHwung)

💅 Polish

• babel-generator
  • #15757 recordAndTupleSyntaxType defaults to "hash" (@coderaiser)

🏠 Internal

• #15748 Migrate to eslint.config.js (@JLHwung)
• #15758 Use Prettier 3 stable (@nicolo-ribaudo)

Committers: 5

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

v7.22.8

v7.22.8 (2023-07-06)

This release reverts a commit that caused all new angular installations to fail: angular/angular-cli#25496

↩️ Revert

• babel-core, babel-traverse
  • #15754 Revert "Use NodePath#hub as part of the paths cache key" (@nicolo-ribaudo)

Committers: 1

• Nicolò Ribaudo (@nicolo-ribaudo)

v7.22.7

v7.22.7 (2023-07-06)

🐛 Bug Fix

• babel-generator
  • #15719 fix: Avoid internally generating negative source maps columns (@liuxingbaoyu)
• babel-core, babel-traverse
  • #15725 Use NodePath#hub as part of the paths cache key (@nicolo-ribaudo)
• Other
  • #15747 fix: export meta from eslint-parser/experimental-worker (@JLHwung)

🏠 Internal

• babel-core, babel-traverse
  • #15702 Refactor visitors merging (@nullableVoidPtr)

Committers: 4

• Avery (@nullableVoidPtr)
• Huáng Jùnliàng (@JLHwung)
• Nicolò Ribaudo (@nicolo-ribaudo)
• @liuxingbaoyu

v7.22.6

v7.22.6 (2023-07-04)

🐛 Bug Fix

• babel-compat-data, babel-helper-compilation-targets, babel-preset-env
  • #15727 Add opera mobile compat data (@JLHwung)
• babel-plugin-transform-optional-chaining
  • #15739 Fix transform of delete a?.b in function params (@nicolo-ribaudo)
• babel-helper-split-export-declaration, babel-plugin-transform-modules-commonjs
  • #15736 fix: Default export for duplicate names (@liuxingbaoyu)
• babel-compat-data, babel-preset-env
  • #15726 update compat-data sources (@JLHwung)
• babel-helpers, babel-plugin-proposal-explicit-resource-management, babel-runtime-corejs3, babel-runtime
  • #15705 Fix handling of sync error in @@asyncDispose (@nicolo-ribaudo)
• babel-standalone
  • #15707 fix: Support transforming Explicit Resource Management in stage-2 (@liuxingbaoyu)
• babel-core
  • #15626 fix: Works correctly with --frozen-intrinsics (@liuxingbaoyu)

🏠 Internal

• babel-helper-create-class-features-plugin, babel-plugin-transform-classes
  • #15700 Minor class transform cleanups (@JLHwung)

🔬 Output optimization

• babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-transform-class-properties, babel-plugin-transform-optional-chaining, babel-plugin-transform-typescript
  • #15740 Compress output for optional chain with multiple ?. (@nicolo-ribaudo)
• babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-plugin-proposal-pipeline-operator, babel-plugin-transform-class-properties, babel-plugin-transform-nullish-coalescing-operator, babel-plugin-transform-optional-chaining, babel-plugin-transform-private-property-in-object, babel-traverse
  • #15741 Inject tmp vars in the params list of IIFEs when possible (@nicolo-ribaudo)

Committers: 5

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

v7.22.5

v7.22.5 (2023-06-08)

🐛 Bug Fix

• babel-preset-env, babel-standalone
  • #15675 Fix using syntax-unicode-sets-regex in standalone (@nicolo-ribaudo)

💅 Polish

• babel-core
  • #15683 Suggest -transform- when resolving missing plugins (@nicolo-ribaudo)

Committers: 4

• Avery (@nullableVoidPtr)
• Babel Bot (@babel-bot)
• Nicolò Ribaudo (@nicolo-ribaudo)
• @liuxingbaoyu

v7.22.4

v7.22.4 (2023-05-29)

🐛 Bug Fix

• babel-traverse
  • #15649 Set shorthand: false when renaming an identifier inside an object property (@coderaiser)

🏠 Internal

• babel-types
  • #15666 Add missing attributes/assertions to VISITOR_KEYS (@nicolo-ribaudo)
• babel-parser
  • #15667 Mark assert attributes with extra.deprecatedAssertSyntax (@nicolo-ribaudo)

Committers: 3

• Huáng Jùnliàng (@JLHwung)
• Nicolò Ribaudo (@nicolo-ribaudo)
• coderaiser (@coderaiser)

v7.22.3

v7.22.3 (2023-05-27)

• Re-publish all the package published in 7.22.0 that hadn't been republished yet. We accidentally published them with a package.json file containing "type": "script" instead of "type": "commonjs" (#15664).

v7.22.2

v7.22.2 (2023-05-26)

🐛 Bug Fix

• babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs2
  • #15660 Fix importing symbol polyfill in @babel/runtime-corejs2 (@nicolo-ribaudo)

Committers: 1

• Nicolò Ribaudo (@nicolo-ribaudo)

v7.22.1

v7.22.1 (2023-05-26)

🐛 Bug Fix

• babel-preset-env
  • #15658 Workaround for broken babel-preset-react-app (@nicolo-ribaudo)

Committers: 2

• Nicolò Ribaudo (@nicolo-ribaudo)
• @liuxingbaoyu