npm / @rolldown/plugin-babel
@rolldown/plugin-babel
What changed in @rolldown/plugin-babel 0.1 to 0.2, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-25.
4 new APIs and options1 behavior and defaults1 tooling6 fixes and other
See which of these apply to your code, ranked, in your agent:
npx @unstale/cli init@rolldown/plugin-babel 0.26 changes
New APIs and options 2
Adds an Emotion plugin to @rolldown/plugin-babel.
Adds the runtimeVersion option for deduplicating Babel helpers.
Behavior and default changes 1
The Rolldown runtime module is excluded by default, so Babel no longer processes it unless configured otherwise.
Fixes and other changes 3
Set inputSourceMap to false to avoid combining source maps twice.
Suppresses type errors when @types/babel__core is not installed.
Queries are ignored when applying TypeScript and JSX parsers, so query strings no longer interfere with parser selection.
@rolldown/plugin-babel 0.16 changes
New APIs and options 2
Presets can specify dependencies to optimize.
Adds the include option by default.
Tooling 1
Formats Babel errors.
Fixes and other changes 3
String code filters now use substring matching.
Adds proper support for Babel 7.
The Babel plugin now uses enforce: 'pre'.