babel-plugin-proposal-import-wasm-source, babel-plugin-syntax-import-source, babel-plugin-transform-dynamic-import
- #15870 Support transforming import source for wasm (@nicolo-ribaudo)
babel-helper-module-transforms, babel-helpers, babel-plugin-proposal-import-defer, babel-plugin-syntax-import-defer, babel-plugin-transform-modules-commonjs, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime, babel-standalone
- #15878 Implement import defer proposal transform support (@nicolo-ribaudo)
babel-generator, babel-parser, babel-types
- #15845 Implement import defer parsing support (@nicolo-ribaudo)
- #15829 Add parsing support for the "source phase imports" proposal (@nicolo-ribaudo)
babel-generator, babel-helper-module-transforms, babel-parser, babel-plugin-transform-dynamic-import, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-traverse, babel-types
- #15682 Add createImportExpressions parser option (@JLHwung)
babel-standalone
- #15671 Pass through nonce to the transformed script element (@JLHwung)
babel-helper-function-name, babel-helper-member-expression-to-functions, babel-helpers, babel-parser, babel-plugin-proposal-destructuring-private, babel-plugin-proposal-optional-chaining-assign, babel-plugin-syntax-optional-chaining-assign, babel-plugin-transform-destructuring, babel-plugin-transform-optional-chaining, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime, babel-standalone, babel-types
- #15751 Add support for optional chain in assignments (@nicolo-ribaudo)
babel-helpers, babel-plugin-proposal-decorators
- #15895 Implement the "decorator metadata" proposal (@nicolo-ribaudo)
babel-traverse, babel-types
- #15893 Add t.buildUndefinedNode (@liuxingbaoyu)
babel-preset-typescript
- #15913 Add rewriteImportExtensions option to TS preset (@nicolo-ribaudo)
babel-parser
- #15896 Allow TS tuples to have both labeled and unlabeled elements (@yukukotani)

:bug: Bug Fix

babel-plugin-transform-block-scoping
- #15962 fix: transform-block-scoping captures the variables of the method in the loop (@liuxingbaoyu)

:nail_care: Polish

babel-traverse
- #15797 Expand evaluation of global built-ins in @babel/traverse (@lorenzoferre)
babel-plugin-proposal-explicit-resource-management
- #15985 Improve source maps for blocks with using declarations (@nicolo-ribaudo)

:microscope: Output optimization

babel-core, babel-helper-module-transforms, babel-plugin-transform-async-to-generator, babel-plugin-transform-classes, babel-plugin-transform-dynamic-import, babel-plugin-transform-function-name, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-umd, babel-plugin-transform-parameters, babel-plugin-transform-react-constant-elements, babel-plugin-transform-react-inline-elements, babel-plugin-transform-runtime, babel-plugin-transform-typescript, babel-preset-env
- #15984 Inline exports.XXX = update in simple variable declarations (@nicolo-ribaudo)