@babel/cli

:warning: In Babel 7.8.0 we introduced the --copy-ignored option for @babel/cli, defaulting to false. However, previous versions behaved as if that option was present: for this reason, we changed its default value to true (when --copy-files is provided) and introduced a --no-copy-ignored option to disable it.

:eyeglasses: Spec Compliance

• babel-parser

  • fix: properly parse member expression after property initializer (@vedantroy)

  • Update coalesce precedence (@JLHwung)

  • fix: triple __proto__ in object patterns should be allowed (@JLHwung)

  • Duplicate __proto__ key should be allowed in object patterns (@JLHwung)

:bug: Bug Fix

• babel-cli

  • [@babel/cli] Copy ignored files by default (@nicolo-ribaudo)

• babel-compat-data

  • Fix core-js 2 builtin data for opera (@danez)

• babel-helpers, babel-plugin-proposal-class-properties, babel-plugin-proposal-decorators, babel-plugin-transform-classes, babel-plugin-transform-parameters, babel-plugin-transform-typeof-symbol, babel-preset-env

  • Avoid compiling the _typeof helper with itself (@nicolo-ribaudo)

• babel-traverse

  • Bug/missing references after crawl (@regiontog)

• babel-plugin-transform-parameters

  • Fix rest parameters indexing with TypeScript 'this parameter' (@BenoitZugmeyer)

• babel-plugin-transform-for-of

  • fix: for-of transform should skip for-await-of (@JLHwung)

• babel-generator

  • Fix parentheses removal in nullish-coalescing operation (@sidntrivedi012)

• babel-helper-compilation-targets

  • fix: supply '.' subpath for backward compatibility with node.js 13.0-13.1 (@JLHwung)

:nail_care: Polish

• babel-core

  • polish: throw human-friendly error when item-option pair is incorrectly unwrapped (@JLHwung)

:memo: Documentation

• babel-parser

  • add AST for the module attribute proposal (@xtuc)

• babel-preset-env

  • update compat-data related docs/config [skip ci] (@JLHwung)

:house: Internal

• babel-compat-data

  • Update compat table (@nicolo-ribaudo)

  • Delete duplicated file in @babel/compat-data (@nicolo-ribaudo)

  • chore: map mobile browser data to their desktop version (@JLHwung)

  • Check that generated compat-data is up to date on CI (@nicolo-ribaudo)

• babel-parser

  • refactor: simplify toAssignable routine (@JLHwung)

  • chore: use @babel/eslint-config-internal (@JLHwung)

• babel-compat-data, babel-preset-env

  • Re-generate preset-env fixtures (@nicolo-ribaudo)

• babel-compat-data, babel-node, babel-parser, babel-preset-env

  • Enable no-process-exit (@JLHwung)

• Other

  • chore: replace yarn-upgrade by bump-babel-dependencies in vuejs e2e tests (@JLHwung)

  • chore: test against @vue/babel-preset-app (@JLHwung)

• babel-core

  • Exclude import() tests from pubilsh build (@nicolo-ribaudo)

:running_woman: Performance

• babel-parser

  • fix(babel-parser): avoid state.clone() to clone the whole token store (@3cp)