@babel/cli

Blog post on the website

:eyeglasses: Spec Compliance

• babel-parser

  • Disallow private name in object elements and TS type elements (@JLHwung)

  • LiteralPropertyName should allow BigIntLiteral (@JLHwung)

  • fix: check await when parsing AsyncArrowBindingIdentifier (@JLHwung)

  • Fix: TopLevelAwait should respect await identifiers defined in sub scope. (@JLHwung)

  • fix: Class Field Initializer should not allow await expression as immediate child (@JLHwung)

• babel-plugin-proposal-numeric-separator

  • StringNumericLiteral does not include NumericLiteralSeparator (@JLHwung)

• babel-generator, babel-parser, babel-plugin-proposal-private-methods

  • [parser] Disallow duplicate and undeclared private names (@nicolo-ribaudo)

:boom: Breaking Change

• breaking

  babel-types

  • (opt-in) Improve @babel/types with env.BABEL_TYPES_8_BREAKING (@nicolo-ribaudo)

:rocket: New Feature

• babel-standalone

  • Merge env-standalone to babel-standalone (@JLHwung)

• babel-core

  • Add babelrc.json support (@yordis)

  • Add support for babel.config.mjs and .babelrc.mjs (@nicolo-ribaudo)

• babel-compat-data, babel-preset-env-standalone, babel-preset-env

  • Add optional-chaining and nullish-coalescing to preset-env (@Druotic)

• babel-helper-module-transforms, babel-plugin-transform-modules-systemjs

  • add allowTopLevelThis option to transform-modules-systemjs (@JLHwung)

• babel-parser

  • enable optional chaining by default in @babel/parser (@jackisherwood)

• babel-cli

  • --copy-ignored flag added to CLI (@rajasekarm)

  • Add --out-file-extension option to babel-cli (@eps1lon)

• babel-core, babel-generator, babel-parser

  • Enable nullish coalescing by default in @babel/parser (@layershifter)

• babel-core, babel-parser

  • [parser] enable dynamic import by default (@AbdulAli19)

:bug: Bug Fix

• babel-node

  • Filename detection should respect short flags (@JLHwung)

• babel-plugin-proposal-numeric-separator

  • StringNumericLiteral does not include NumericLiteralSeparator (@JLHwung)

• babel-preset-env

  • Use chrome data when android is absent (@JLHwung)

  • fix: Promise.any requires global.AggregateError (@JLHwung)

• babel-parser

  • When reading a new string, U+2028/2029 should correctly set the new column (@JLHwung)

  • Refactor parseSubscript (@JLHwung)

  • fix: lost leading comment after named import (@elevatebart)

• Other

• babel-traverse

  • Override toString in case this function is printed (@jayenashar)

• babel-helper-module-transforms, babel-plugin-transform-modules-commonjs

  • helper-module-transforms: dereference imported template tag (@ajafff)

• babel-traverse, babel-types

  • Fix parameter expression get binding (@JLHwung)

• babel-core

  • @babel/core: parse should parse only (@kaicataldo)

• babel-helpers

  • fix: Object.getOwnPropertySymbols called on non-object (@bassaer)

:nail_care: Polish

• babel-node

  • Use babel > as prompt in babel-node (@ZYSzys)

• babel-parser

  • refactor: remove inClassProperty parser state (@JLHwung)

:memo: Documentation

• babel-preset-env

  • CONTRIBUTING: Update link to plugin-features.js [skip ci] (@andersk)

• Other

  • Added instructions to fork the repo in order to setup. (@sidntrivedi012)

:house: Internal

• babel-preset-env

  • chore: update corejs fixtures (@JLHwung)

  • chore: update caniuse-usage Chrome 49 related fixtures (@JLHwung)

  • Replace custom "findSuggestion" function with "levenary" (@nicolo-ribaudo)

• babel-core

  • Prepare @babel/core for asynchronicity (@nicolo-ribaudo)

• Other

  • Reduce false negative cases of typescript parser tests (@JLHwung)

  • Update Test262, Flow and TS parser tests (@nicolo-ribaudo)

  • Bump coverage target from 80% to 90% (@nicolo-ribaudo)

  • Fix recent e2e-vuejs-cli error (@JLHwung)

  • Add integration test: e2e-vue-cli (@JLHwung)

  • chore: update test262 (@JLHwung)

  • chore: refine e2e test scripts (@JLHwung)

  • chore: separate build-standalone with coverage (@JLHwung)

  • Move coverage to GitHub actions (@JLHwung)

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

  • Extract targets parser and compat data from preset-env (@nicolo-ribaudo)

• babel-parser

  • test: add invalid-lone-import test (@JLHwung)

  • refactor: remove unecessary checkYieldAwaitInDefaultParams (@JLHwung)

  • refactor: remove unused invalidTemplateEscapePosition tokenizer state (@JLHwung)

  • TSTypeCastExpression should not be inside call parameters (@JLHwung)

  • Remove unused parser methods (@JLHwung)

• Every package

  • chore: specify package type [skip-ci] (@JLHwung)

:leftwards_arrow_with_hook: Revert

• babel-cli

  • fix: minified should not accept optional argument (@JLHwung)