@babel/preset-flow 8.0.0

on Node.js NPM

v8.0.0 (2026-06-16)

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 http://babeljs.io/blog/2026/06/16/8.0.0!

👓 Spec Compliance

• babel-core
  • #18039 perf: Only extract source map comments at the end of the file (@liuxingbaoyu)

💥 Breaking Change

• 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
  • #18069 Fallback to assuming ESM support with modules: auto (@nicolo-ribaudo)
• babel-plugin-transform-runtime, babel-runtime-corejs3, babel-runtime
  • #18036 Remove corejs exports for @babe/runtime-corejs3 (@liuxingbaoyu)
• babel-parser
  • #18034 Remove locations: "packed" (@liuxingbaoyu)

🐛 Bug Fix

• babel-generator
  • #18046 fix(generator): improve new callee parens check (@JLHwung)
• babel-plugin-transform-modules-systemjs
  • #18032 fix(systemjs): support proto as an export name (@JLHwung)

📝 Documentation

• #18070 Add EOL date for Babel 7 (end of June 2027) to SECURITY.md (@nicolo-ribaudo)

🏠 Internal

• #18018 ci: enforce yarn integrity (@JLHwung)

🏃‍♀️ Performance

• babel-core
  • #18039 perf: Only extract source map comments at the end of the file (@liuxingbaoyu)

Committers: 6

• Babel Bot (@babel-bot)
• Huáng Jùnliàng (@JLHwung)
• James Garbutt (@43081j)
• Nicolò Ribaudo (@nicolo-ribaudo)
• Sandy Chen (@sandy2008)
• @liuxingbaoyu