@babel/compat-data

:bug: Bug Fix

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

  • Add opera mobile compat data (@JLHwung)

• babel-plugin-transform-optional-chaining

  • Fix transform of delete a?.b in function params (@nicolo-ribaudo)

• babel-helper-split-export-declaration, babel-plugin-transform-modules-commonjs

  • fix: Default export for duplicate names (@liuxingbaoyu)

• babel-compat-data, babel-preset-env

  • update compat-data sources (@JLHwung)

• babel-helpers, babel-plugin-proposal-explicit-resource-management, babel-runtime-corejs3, babel-runtime

  • Fix handling of sync error in @@asyncDispose (@nicolo-ribaudo)

• babel-standalone

  • fix: Support transforming Explicit Resource Management in stage-2 (@liuxingbaoyu)

• babel-core

  • fix: Works correctly with --frozen-intrinsics (@liuxingbaoyu)

:house: Internal

• babel-helper-create-class-features-plugin, babel-plugin-transform-classes

  • Minor class transform cleanups (@JLHwung)

:microscope: Output optimization

• babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-transform-class-properties, babel-plugin-transform-optional-chaining, babel-plugin-transform-typescript

  • Compress output for optional chain with multiple ?. (@nicolo-ribaudo)

• babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-plugin-proposal-pipeline-operator, babel-plugin-transform-class-properties, babel-plugin-transform-nullish-coalescing-operator, babel-plugin-transform-optional-chaining, babel-plugin-transform-private-property-in-object, babel-traverse

  • Inject tmp vars in the params list of IIFEs when possible (@nicolo-ribaudo)