@babel/runtime-corejs2

Thanks @AndrewLeedham, @fisker, @kik-o, @kitos, @lazytype for their first PRs!

We are also releasing the first experimental version of the new polyfills plugins: you can check them out at babel/babel-polyfills.

:eyeglasses: Spec Compliance

• babel-plugin-proposal-logical-assignment-operators

  • logical-assignment: Do not assign names to anonymous functions (@arku)

:rocket: New Feature

• babel-helper-create-class-features-plugin, babel-helper-member-expression-to-functions, babel-helper-optimise-call-expression, babel-helper-replace-supers, babel-parser, babel-plugin-proposal-class-properties

  • Handle private access chained on an optional chain (@jridgewell)

• babel-standalone

  • feat: add privatePropertyInObject to babel-standalone (@JLHwung)

  • Support data-type="module" to generate native <script type="module"> (@dfabulich)

• babel-cli, babel-helper-create-class-features-plugin, babel-parser, babel-plugin-proposal-private-property-in-object, babel-types

  • Add private-property-in-object support (@jridgewell)

• babel-compat-data, babel-plugin-transform-template-literals, babel-plugin-transform-unicode-escapes, babel-preset-env, babel-standalone

  • Transform ES2015 Unicode Escapes to ES5 (@jridgewell)

• babel-parser, babel-plugin-syntax-module-attributes, babel-standalone

  • added basic support for module attributes and tests updated (@vivek12345)

• babel-helper-compilation-targets, babel-preset-env

  • [preset-env] Add browserslistEnv option (@AndrewLeedham)

• babel-cli

  • Log after subsequent compilations in --watch mode (@nicolo-ribaudo)

• babel-helpers, babel-plugin-transform-destructuring, babel-plugin-transform-spread, babel-traverse

  • Add "allowArrayLike" option to the destructuring and spread transforms (@nicolo-ribaudo)

• babel-helpers, babel-plugin-transform-for-of, babel-preset-env

  • Add "allowArrayLike" support to the for-of transform (@nicolo-ribaudo)

• babel-parser

  • Enable import.meta by default in @babel/parser (#11364) (@kik-o)

• babel-plugin-transform-react-pure-annotations, babel-preset-react

  • Implement plugin-transform-react-pure-annotations and add to preset-react (@devongovett)

• babel-compat-data, babel-preset-env

  • Add class proposals to shipped proposals (@JLHwung)

:bug: Bug Fix

• babel-traverse

  • scope.rename() missing identifier in VariableDeclarator (@yulanggong)

• babel-plugin-proposal-optional-chaining

  • fix: optional-chaining should work correctly with ts non-null operator (@macabeus)

• babel-parser, babel-types

  • refactor: add isLiteralPropertyName to parser utils (@JLHwung)

• babel-plugin-transform-typescript

  • fix: don't elide jsx pragma import namespaces (@jquense)

• babel-plugin-proposal-object-rest-spread

  • fix(plugin-proposal-object-rest-spread): use computed memberExpression for literal keys (@kitos)

• babel-plugin-transform-runtime

  • fix: skip transforming delete something.includes (@JLHwung)

• babel-generator

  • getters and setters support in generator for declare class statement (@zxbodya)

:nail_care: Polish

• babel-helpers, babel-plugin-proposal-class-properties, babel-plugin-proposal-decorators, babel-plugin-transform-classes, babel-plugin-transform-function-name, babel-plugin-transform-parameters, babel-plugin-transform-react-jsx, babel-plugin-transform-runtime, babel-plugin-transform-typescript, babel-preset-env

  • [helpers] Add a private function name within createSuper (@cpojer)

:house: Internal

• Other

  • Fix typo (@fisker)

  • chore: use latest node in GitHub actions (@JLHwung)

  • chore: update test262 (@JLHwung)

  • chore: pin windows node.js version (@JLHwung)

  • chore: update babel deps (@JLHwung)

• babel-parser

  • Fix comments for smartPipeline topic-forbidding contexts (@lazytype)

• babel-core, babel-generator, babel-helper-compilation-targets, babel-helpers, babel-parser, babel-plugin-proposal-decorators, babel-plugin-proposal-json-strings, babel-plugin-transform-block-scoping, babel-plugin-transform-flow-comments, babel-plugin-transform-modules-systemjs, babel-plugin-transform-react-jsx-source, babel-plugin-transform-runtime, babel-preset-env, babel-standalone, babel-template, babel-traverse, babel-types

  • Use ?. where it represents the intended semantics (@nicolo-ribaudo)

:running_woman: Performance

• babel-plugin-proposal-object-rest-spread

  • Use single object spread call in loose mode (@jridgewell)

:leftwards_arrow_with_hook: Revert

• babel-standalone

  • Downgrade rollup to 1.27.9 (@nicolo-ribaudo)