Babel: v7.12.0 Release

v7.12.0 (2020-10-14)

Thanks @akphi, @Amareis, @barronwei, @iamfotx, @mischnic, @overlookmotel, @ryanrhee, @snitin315, @sosukesuzuki, @timgates42, @zweimach for their first PRs.

:eyeglasses: Spec Compliance

• babel-core, babel-helper-module-transforms, babel-parser, babel-plugin-proposal-export-namespace-from, babel-plugin-syntax-module-string-names, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd, babel-types
  • #12091 String import/export specifier (@JLHwung)
• babel-parser
  • #12111 [ts] Throw a syntax error for index signature with declare (@sosukesuzuki)

:rocket: New Feature

• babel-core, babel-generator, babel-parser, babel-plugin-syntax-import-assertions, babel-plugin-syntax-module-attributes, babel-standalone, babel-types
  • #12139 Parse import-assertions (@xtuc)
• babel-core, babel-helper-create-class-features-plugin, babel-helper-module-transforms, babel-helper-replace-supers, babel-plugin-proposal-class-static-block, babel-plugin-transform-modules-commonjs, babel-standalone, babel-traverse, babel-types
  • #12143 Transform class static block (@JLHwung)
• babel-generator, babel-parser, babel-plugin-syntax-class-static-block, babel-types
  • #12079 Parse class static block (@JLHwung)
• babel-generator, babel-parser, babel-types
  • #12129 Support TypeScript mapped type 'as' clauses (@existentialism)
  • #12147 [ts] Add support for the "intrinsic" keyword (@nicolo-ribaudo)
• babel-parser, babel-types
  • #12131 [ts] Add support for template interpolations in types (@nicolo-ribaudo)
• babel-plugin-transform-modules-systemjs
  • #12163 SystemJS top-level await support (@guybedford)
• babel-plugin-transform-typescript, babel-preset-typescript
  • #11950 Add jsxPragmaFrag support to typescript transform (@JLHwung)
• babel-core, babel-helper-module-transforms, babel-parser, babel-plugin-proposal-export-namespace-from, babel-plugin-syntax-module-string-names, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd, babel-types
  • #12091 String import/export specifier (@JLHwung)
• babel-core
  • #11907 Return a list of files that were read from loadPartialConfig (@devongovett)

:bug: Bug Fix

• babel-parser
  • #12167 [ts] Add asserts: false to TSTypePredicate node (@sosukesuzuki)
  • #12161 Move check for TSTypeCastExpression to catch another case (@existentialism)
  • #12120 Throw a recoverable error for missing initializer in const declaration (@sosukesuzuki)
  • #12108 Improve syntax error for class fields in ambient context (@sosukesuzuki)
  • #12088 Throw a syntax error for empty type parameter/argument (@sosukesuzuki)
  • #12093 Throw an error for a declare class field that have an initializer (@sosukesuzuki)
  • #12085 Do not throw an error for optional binding pattern params in function declaration (@sosukesuzuki)
  • #12076 Fix invalid setter parse (@fisker)
  • #12054 Throw a syntax error for a declare function with a body (@sosukesuzuki)
  • #12065 Throw a syntax error for a constructor with type parameters (@sosukesuzuki)
• babel-plugin-transform-typescript
  • #12149 fix transform-typescript logic to remove definite fields (@akphi)
  • #12122 [transform-typescript] Fix import elision for type exports (@Amareis)
• babel-helper-member-expression-to-functions, babel-plugin-proposal-class-properties, babel-plugin-proposal-nullish-coalescing-operator, babel-plugin-proposal-optional-chaining
  • #12032 Handle cases when ?? and ?. is in binding initializers (@JLHwung)
• babel-helper-builder-react-jsx-experimental, babel-plugin-transform-react-jsx-development, babel-plugin-transform-react-jsx, babel-preset-react
  • #12116 add .js extension to react runtime for JSX transform (@lunaruan)
• babel-traverse, babel-types
  • #12119 fix: mark Pattern in CatchClause as scope (@JLHwung)
• babel-generator
  • #12114 Fix printing TSTypeOperator (@existentialism)
  • #12082 Ensure expressions wrapped in parens (@overlookmotel)
  • #12081 Fix @babel/generator does not print decorators of private properties (@zweimach)
  • #12086 Add sourcemap markings for each line of a string (@jridgewell)
• babel-plugin-transform-modules-systemjs
  • #12110 Fix reexporting init-less variable in systemjs (@JLHwung)
• babel-helper-module-transforms, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-umd, babel-plugin-transform-runtime
  • #11739 [cjs] Skip duplicate reexported bindings in namespace reexports (@mischnic)
• babel-helper-create-regexp-features-plugin, babel-plugin-transform-unicode-regex
  • #12077 Bump regexpu-core (@existentialism)
• babel-plugin-proposal-do-expressions, babel-traverse
  • #11728 fix(do-expr): SwitchStatement with IfStatement cases (@barronwei)

:nail_care: Polish

• babel-parser
  • #12072 [parser] Better error message for missing number exponent (@iamfotx)
  • #12061 Throw a syntax error for a parameter properties in not constructor (@sosukesuzuki)
• babel-helper-compilation-targets, babel-helper-validator-option, babel-preset-env
  • #12006 refactor: add @babel/helper-validator-option (@JLHwung)

:house: Internal

• babel-cli, babel-helper-transform-fixture-test-runner, babel-traverse
  • #11797 Replace lodash 'defaults' usage with ES6 Spread initializer (@jayaddison)
• babel-plugin-transform-runtime, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  • #10853 Specify runtime exports (@JLHwung)
• babel-core
  • #11689 Instantiate presets before plugins (@nicolo-ribaudo)
• babel-plugin-proposal-logical-assignment-operators, babel-plugin-proposal-numeric-separator, babel-plugin-syntax-import-meta, babel-plugin-syntax-logical-assignment-operators, babel-plugin-syntax-numeric-separator, babel-plugin-transform-modules-systemjs, babel-preset-env, babel-standalone
  • #12117 Archive plugins (@JLHwung)
• Other
  • #12154 chore: bump gulp-cli to 2.3.0 (@JLHwung)
  • #12134 Yarn 2.3 (@nicolo-ribaudo)
  • #12099 fix: apply terser plugin only on *.min.js (@JLHwung)
  • #12098 docs: update build required node version (@JLHwung)
  • #12078 Bump Babel deps (@existentialism)
  • #12070 chore: pin browserslist version to 4.12.0 (@JLHwung)
  • #12063 chore: add git-blame-ignore-revs (@JLHwung)
  • #12049 chore: use latest node on ci workflow when possible (@JLHwung)
• babel-compat-data, babel-preset-env
  • #12118 chore: bump electron-to-chromium (@JLHwung)
• babel-parser
  • #12103 Add missing tests for TypeScript syntax errors (@sosukesuzuki)
• babel-core, babel-plugin-transform-runtime
  • #12102 docs: Fix simple typo, preprelease -> pre-release (@timgates42)
• babel-compat-data
  • #12044 chore: remove unused dependencies (@JLHwung)

Committers: 21

• An Phi (@akphi)
• Ananda Umamil (@zweimach)
• Barron Wei (@barronwei)
• Brian Ng (@existentialism)
• Devon Govett (@devongovett)
• Guy Bedford (@guybedford)
• Huáng Jùnliàng (@JLHwung)
• James Addison (@jayaddison)
• Justin Ridgewell (@jridgewell)
• Luna Ruan (@lunaruan)
• Nicolò Ribaudo (@nicolo-ribaudo)
• Niklas Mischkulnig (@mischnic)
• Nitin Kumar (@snitin315)
• Ryan Rhee (@ryanrhee)
• Sosuke Suzuki (@sosukesuzuki)
• Sven Sauleau (@xtuc)
• Tim Gates (@timgates42)
• @overlookmotel
• fisker Cheung (@fisker)
• iamfotx (@iamfotx)
• Иван Плесских (@Amareis)