@babel/cli

:eyeglasses: Spec Compliance

• babel-generator, babel-parser

  • Fix parenthesis for nullish coalescing (@vivek12345)

• babel-helpers, babel-plugin-transform-block-scoping, babel-traverse

  • Fix tdz checks in transform-block-scoping plugin (@nicolo-ribaudo)

:rocket: New Feature

• babel-core

  • feat(errors): validate preset when filename is absent (@JLHwung)

• babel-helper-create-class-features-plugin, babel-helpers, babel-plugin-proposal-private-methods

  • Class Private Static Accessors (@tim-mc)

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

  • V8intrinsic syntax plugin (@JLHwung)

• babel-preset-typescript

  • Allow setting 'allowNamespaces' in typescript preset (@dsgkirkby)

• babel-parser

  • Do not register ambient classes to the TS scope (@nicolo-ribaudo)

• babel-types

  • Add static to class property builder (@yuri-karadzhov)

:bug: Bug Fix

• babel-helpers, babel-plugin-transform-destructuring, babel-plugin-transform-modules-commonjs, babel-preset-env

  • fix: early return when instance is not iterable (@JLHwung)

• babel-plugin-transform-runtime

  • Add supports for polyfill computed methods (@rhyzx)

• babel-preset-env

  • Don't polyfill when evaluation is not confident (@rhyzx)

  • [preset-env] Include / exclude module plugins properly (@AdamRamberg)

  • Replace es.string.reverse with es.array.reverse (@epicfaace)

• babel-plugin-transform-named-capturing-groups-regex

  • fix: transform name capturing regex once (@JLHwung)

• babel-types

  • fix typescript for babel-types (@tanhauhau)

  • Add a builder definition including name for tsTypeParameter (@deificx)

• babel-parser

  • Refactor trailing comment adjustment (@banga)

  • Retain trailing comments in array expressions (@banga)

  • fix: assign trailing comment to ObjectProperty only when inside an ObjectExpression (@JLHwung)

• babel-parser, babel-types

  • Don't allow JSXNamespacedName to chain (@jridgewell)

• babel-generator, babel-plugin-transform-typescript, babel-types

  • Add TSBigIntKeyword to @babel/types (@nicolo-ribaudo)

• babel-core, babel-types

  • Do not delete "fake" source map comments from strings (@nicolo-ribaudo)

• babel-plugin-transform-flow-comments

  • Fix flow comments plugin issues (@zaygraveyard)

• babel-helpers, babel-plugin-transform-react-constant-elements

  • [fix] jsx helper calls order (@Sinewyk)

• babel-plugin-proposal-decorators

  • fix: register inserted class declaration (@thiagoarrais)

• babel-plugin-proposal-do-expressions, babel-traverse

  • Do expressions transform for switch statements (@tanhauhau)

  • remove finally from completion record in try statement (@tanhauhau)

• babel-helpers, babel-plugin-transform-named-capturing-groups-regex

  • fix capturing group for matchAll (@tanhauhau)

:nail_care: Polish

• babel-plugin-transform-runtime, babel-preset-env

  • Don't allow instance properties transformation on namespace (@rhyzx)

:house: Internal

• babel-register

  • Remove core-js dependency from @babel/register (@coreyfarrell)

• babel-helper-fixtures, babel-helper-transform-fixture-test-runner, babel-preset-env

  • Use "validateLogs" for preset-env's debug fixtures (@nicolo-ribaudo)

• babel-parser

  • Refactor trailing comment adjustment (@banga)

• babel-helper-fixtures, babel-helper-transform-fixture-test-runner, babel-plugin-proposal-dynamic-import, babel-preset-env

  • Allow testing logs with @babel/helper-transform-fixture-test-runner (@nicolo-ribaudo)

• babel-runtime-corejs2, babel-runtime, babel-types

  • Commit generated code (@JLHwung)

• babel-cli, babel-core, babel-generator, babel-helper-create-class-features-plugin, babel-helper-fixtures, babel-node, babel-parser, babel-plugin-proposal-do-expressions, babel-plugin-proposal-pipeline-operator, babel-plugin-transform-modules-commonjs, babel-plugin-transform-runtime, babel-preset-env, babel-standalone, babel-template, babel-traverse, babel-types

  • Update dev dependencies and fix linting errors (@danez)

• babel-cli

  • added flow to babel cli (@Letladi)

:running_woman: Performance

• babel-helpers, babel-plugin-transform-modules-commonjs, babel-preset-env

  • Improves the logic to import objects in helpers (@ifsnow)

• babel-traverse

  • perf: always return void 0 as undefined node (@JLHwung)