@babel/compat-data

NOTE: The changelog below is relative to v8.0.0-rc.6. You can find a summary of all the breaking changes shipped in the Babel 8 release line in the migration guide for users and migration guide for plugin developers.

Read the release blog post at babeljs.io/blog/2026/06/16/8.0.0!

:eyeglasses: Spec Compliance

• babel-core

  • perf: Only extract source map comments at the end of the file (@liuxingbaoyu)

:boom: Breaking Change

• breaking

  babel-cli, babel-node, babel-plugin-proposal-decorators, babel-plugin-transform-classes, babel-plugin-transform-function-name, babel-plugin-transform-modules-commonjs, babel-plugin-transform-object-rest-spread, babel-plugin-transform-parameters, babel-plugin-transform-react-constant-elements, babel-plugin-transform-regenerator, babel-preset-env, babel-register

  • Fallback to assuming ESM support with modules: auto (@nicolo-ribaudo)

• breaking

  babel-plugin-transform-runtime, babel-runtime-corejs3, babel-runtime

  • Remove corejs exports for @babe/runtime-corejs3 (@liuxingbaoyu)

• breaking

  babel-parser

  • Remove locations: "packed" (@liuxingbaoyu)

:bug: Bug Fix

• babel-generator

  • fix(generator): improve new callee parens check (@JLHwung)

• babel-plugin-transform-modules-systemjs

  • fix(systemjs): support proto as an export name (@JLHwung)

:memo: Documentation

• Add EOL date for Babel 7 (end of June 2027) to SECURITY.md (@nicolo-ribaudo)

:running_woman: Performance

• babel-core

  • perf: Only extract source map comments at the end of the file (@liuxingbaoyu)