@babel/runtime-corejs2

:eyeglasses: Spec Compliancy

• babel-parser

  • Disallow async functions as loop body. (@nicolo-ribaudo)

  • Parse class heritage as strict mode code. (@nicolo-ribaudo)

  • Disallow new import(x) and import(x,). (@nicolo-ribaudo)

  • Disallow trailing comma after rest. (@nicolo-ribaudo)

:rocket: New Feature

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

  • Private Class Methods Stage 3: Private Accessors. (@tim-mc)

• babel-plugin-proposal-pipeline-operator, babel-plugin-syntax-pipeline-operator

  • Transform for the smart pipeline operator proposal. (@thiagoarrais)

• babel-preset-env-standalone, babel-preset-env

  • Add support for transform-named-capturing-groups-regex in preset-env. (@existentialism)

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

  • Add @babel/plugin-transform-named-capturing-groups-regex. (@nicolo-ribaudo)

• babel-preset-env

  • Add support for proposal-json-strings in preset-env. (@existentialism)

• babel-generator, babel-types

  • Add emit and builder for TSImportType. (@hzoo)

• babel-parser

  • @babel/parser(ts): Add parsing of type import. (@armano2)

:bug: Bug Fix

• babel-parser

  • Disallow usage of invalid keyword after export abstract statement in Typescript. (@armano2)

  • Fix handling newline with TypeScript declare and abstract classes. (@existentialism)

  • Fix range on TypeScript index signature parameters. (@existentialism)

  • Throw error if TypeScript class has empty implements. (@existentialism)

  • Fix location for typescript type assertions in AST. (@danez)

  • Ensure modifiers are included in TSParameterProperty ranges. (@existentialism)

  • babel-parser: typescript: add missing bigint keyword. (@armano2)

• babel-types

  • Copy "optional" property when cloning Identifier node. (@unconfident)

• babel-helper-create-class-features-plugin, babel-helpers, babel-plugin-proposal-decorators

  • [decorators] Set method names at compile time instead of at runtime. (@nicolo-ribaudo)

• babel-helper-builder-react-jsx, babel-plugin-transform-react-jsx

  • Revert "Revert babel-helper-builder-react-jsx change from #4988". (@danez)

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

  • [private methods] Define private methods before executing initializers. (@nicolo-ribaudo)

• babel-preset-env

  • Fix handling scoped packages in preset-env include/exclude options. (@existentialism)

:nail_care: Polish

• babel-parser

  • Parser Performance Collection. (@danez)

:memo: Documentation

• Add v7 downloads [skip ci]. (@hzoo)

:house: Internal

• babel-parser

  • Merge declaration and init of props in parser's state. (@nicolo-ribaudo)

• babel-types

  • [@babel/types] Moved generators related to babel-types into the babel-types package directory.. (@cameron-martin)

• Other

  • Test262 update. (@existentialism)

  • Use 2014-present in license. (@xtuc)

  • Bump license years for 2019. (@berlamhenderson)

• babel-helpers

  • Add mixins support to the _decorate helper. (@nicolo-ribaudo)