@babel/generator

:eyeglasses: Spec Compliance

• babel-generator, babel-parser

  • [ts] Enforce order for the override modifier (@nicolo-ribaudo)

:rocket: New Feature

• babel-plugin-proposal-async-do-expressions

  • Implement async-do-expressions transform (@JLHwung)

• babel-core, babel-generator, babel-parser, babel-plugin-proposal-do-expressions, babel-plugin-syntax-async-do-expressions, babel-types

  • Parse async do expressions (@JLHwung)

• babel-preset-env

  • Enable class fields & private methods by default (@nicolo-ribaudo)

• babel-compat-data, babel-preset-env

  • Add private brand checks to shippedProposals (@nicolo-ribaudo)

  • Add class static blocks to preset-env's shippedProposals (@nicolo-ribaudo)

• babel-helper-create-class-features-plugin, babel-plugin-proposal-private-property-in-object, babel-plugin-syntax-private-property-in-object

  • Allow compiling #foo in obj without compiling private fields (@nicolo-ribaudo)

• babel-parser

  • babel-parser(ts): Add new plugin option dts: boolean (@sosukesuzuki)

  • Materialize the class features in @babel/parser. (@JLHwung)

  • Introduce parser error codes (@sosukesuzuki)

• babel-helper-module-transforms, babel-helpers, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-umd

  • Implement importInterop: "node" option for module transforms (@nicolo-ribaudo)

• babel-generator, babel-parser, babel-traverse, babel-types

  • Support parsing Flow's Optional Indexed Access Types (@gkz)

  • Support parsing Flow's Indexed Access Types (@sosukesuzuki)

• babel-parser, babel-traverse

  • Parse string export names by default (moduleStringNames) (@nicolo-ribaudo)

• babel-generator, babel-parser, babel-types

  • Support TypeScript 4.3 get/set type members (@sosukesuzuki)

  • support TS 4.3 override syntax in class (@g-plane)

  • support TS 4.3 static index signature in class (@g-plane)

:bug: Bug Fix

• babel-generator

  • Prevent ForOfStatement from printing the forbidden sequence "for ( async of" (@Zalathar)

  • fix: don't deduplicate comments with same start index (@gzzhanghao)

• babel-generator, babel-plugin-proposal-object-rest-spread, babel-preset-env

  • Simplify the special-case printing of single-param arrow functions (@Zalathar)

• babel-core

  • fix: Don't load browserslist in block-hoist-plugin (@MichaReiser)

:nail_care: Polish

• babel-cli, babel-core, babel-parser, babel-plugin-transform-classes, babel-preset-env, babel-preset-typescript

  • babel-parser: Add new internal ESLint rule to consistent error messages (@sosukesuzuki)

:house: Internal

• babel-parser

  • Add runFixtureTestsWithoutExactASTMatch in parser test runner (@JLHwung)

  • babel-parser: Use this.isThisParam (@sosukesuzuki)

  • refactor: avoid parsing logic on locations (@JLHwung)

• babel-helpers, babel-preset-env, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime

  • Allow putting helpers in individual files (@nicolo-ribaudo)

• Other

  • chore: run coverage-test against node 16 (@JLHwung)

:running_woman: Performance

• babel-core

  • perf(core): check files before interacting with them (@FauxFaux)

  • perf: avoid loadFullConfig when creating block hoist plugin (@JLHwung)

• babel-helper-validator-identifier

  • Improve isIdentifierName performance (@JLHwung)

:microscope: Output optimization

• babel-helper-create-class-features-plugin, babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-async-generator-functions, babel-plugin-proposal-class-properties, babel-plugin-proposal-class-static-block, babel-plugin-proposal-private-methods, babel-plugin-proposal-private-property-in-object, babel-preset-env

  • Mark WeakMaps of private fields as pure (@nicolo-ribaudo)

• babel-helpers, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime

  • Simplify the wrapRegExp helper for named groups (@nicolo-ribaudo)