@babel/eslint-plugin

Thanks @chimurai and @krosenberg for your first PRs!

:eyeglasses: Spec Compliance

• babel-cli, babel-core, babel-helpers, babel-plugin-proposal-class-properties, babel-plugin-proposal-decorators, babel-plugin-transform-classes, babel-plugin-transform-jscript, babel-plugin-transform-parameters, babel-plugin-transform-runtime, babel-plugin-transform-spread, babel-plugin-transform-typescript, babel-preset-env

  • Mark class prototype as read-only (@wentout)

:bug: Bug Fix

• babel-plugin-transform-parameters

  • Fix: default rest argument array elements as undefined (@The-x-Theorist)

• babel-plugin-transform-arrow-functions, babel-traverse

  • Don't resolve shadowed arguments variables from functions (@The-x-Theorist)

• babel-parser

  • maintain estree string literal shape when cloned (@JLHwung)

• babel-traverse

  • Fix duplicate declaration error on ambient class declarations (@The-x-Theorist)

• babel-generator

  • Support flow function type annotation with no parent (@krosenberg)

• babel-plugin-transform-react-jsx

  • Fix JSX pragma anywhere in comment (@The-x-Theorist)

• babel-helper-create-class-features-plugin, babel-helper-environment-visitor, babel-helper-member-expression-to-functions, babel-helper-module-transforms, babel-helper-replace-supers, babel-plugin-transform-classes, babel-traverse

  • Fix handling of this&co in computed keys in arrows transform (@nicolo-ribaudo)

:nail_care: Polish

• babel-parser

  • Recover from shorthand assign exprs (@JLHwung)

  • fix: update UnexpectedPrivateField error message (@JLHwung)

:memo: Documentation

• Many packages

  • Regenerate monorepo READMEs (@nicolo-ribaudo)

:house: Internal

• Every package

  • Run tests in a native Node.js ESM environment (@nicolo-ribaudo)

• babel-parser

  • Extend hasPlugin to accept plugin-configuration array pairs (@js-choi)

• babel-helpers

  • Don't use ESM for required files in @babel/helpers tests (@nicolo-ribaudo)

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

  • Convert proposal-object-rest-spread to TS (@JLHwung)

• babel-parser, babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression, babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-optional-chaining, babel-preset-react, babel-preset-typescript

  • Only bundle the release build, and don't import src in tests (@nicolo-ribaudo)

• Other

  • Fail CI when @babel/runtime ESM tests fail (@nicolo-ribaudo)

:running_woman: Performance

• babel-parser

  • Improve template tokenizing (@JLHwung)

:microscope: Output optimization

• babel-helpers, babel-plugin-proposal-async-generator-functions, babel-plugin-transform-runtime, babel-preset-env, babel-runtime-corejs2, babel-runtime

  • minify helpers-generated.ts (@lightmare)