Babel (Formerly 6to5) v7.14.0 release notes (2021-04-29)

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Babel (Formerly 6to5) v7.14.0 Release Notes

Release Date: 2021-04-29 // almost 3 years ago

:eyeglasses: Spec Compliance
- 📜 babel-generator, babel-parser
  - #13209 [ts] Enforce order for the override modifier (@nicolo-ribaudo)
:rocket: New Feature
- 🔌 babel-plugin-proposal-async-do-expressions
  - #13117 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
  - #13043 Parse async do expressions (@JLHwung)
- babel-preset-env
  - #13091 Enable class fields & private methods by default (@nicolo-ribaudo)
- babel-compat-data, babel-preset-env
  - #13176 Add private brand checks to shippedProposals (@nicolo-ribaudo)
  - #13114 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
  - #13172 Allow compiling #foo in obj without compiling private fields (@nicolo-ribaudo)
- 📜 babel-parser
  - #13113 babel-parser(ts): Add new plugin option dts: boolean (@sosukesuzuki)
  - #13175 Materialize the class features in @babel/parser. (@JLHwung)
  - #13033 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
  - #12838 Implement importInterop: "node" option for module transforms (@nicolo-ribaudo)
- 📜 babel-generator, babel-parser, babel-traverse, babel-types
  - #13224 Support parsing Flow's Optional Indexed Access Types (@gkz)
  - #13053 Support parsing Flow's Indexed Access Types (@sosukesuzuki)
- 📜 babel-parser, babel-traverse
  - #13195 Parse string export names by default (moduleStringNames) (@nicolo-ribaudo)
- 📜 babel-generator, babel-parser, babel-types
  - #13089 Support TypeScript 4.3 get/set type members (@sosukesuzuki)
  - #13097 support TS 4.3 override syntax in class (@g-plane)
  - #13096 support TS 4.3 static index signature in class (@g-plane)
:bug: Bug Fix
- babel-generator
  - #13208 Prevent ForOfStatement from printing the forbidden sequence "for ( async of" (@Zalathar)
  - #13169 fix: don't deduplicate comments with same start index (@gzzhanghao)
- 🔌 babel-generator, babel-plugin-proposal-object-rest-spread, babel-preset-env
  - #13204 Simplify the special-case printing of single-param arrow functions (@Zalathar)
- babel-core
  - #13182 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
  - #13130 babel-parser: Add new internal ESLint rule to consistent error messages (@sosukesuzuki)
:house: Internal
- 📜 babel-parser
  - #13227 Add runFixtureTestsWithoutExactASTMatch in parser test runner (@JLHwung)
  - #13163 babel-parser: Use this.isThisParam (@sosukesuzuki)
  - #13200 refactor: avoid parsing logic on locations (@JLHwung)
- babel-helpers, babel-preset-env, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  - #13190 Allow putting helpers in individual files (@nicolo-ribaudo)
- Other
  - #13183 chore: run coverage-test against node 16 (@JLHwung)
🐎 :running_woman: Performance
- babel-core
  - #13090 perf(core): check files before interacting with them (@FauxFaux)
  - #13223 perf: avoid loadFullConfig when creating block hoist plugin (@JLHwung)
- babel-helper-validator-identifier
  - #13211 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
  - #13194 Mark WeakMaps of private fields as pure (@nicolo-ribaudo)
- babel-helpers, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  - #13201 Simplify the wrapRegExp helper for named groups (@nicolo-ribaudo)