splitting:true keeps React in one shared chunk so a page with several
islands does not ship react-dom repeatedly.
Island .tsx is compiled against React's JSX runtime via a Bun onLoad
plugin. The repo's root tsconfig sets jsxImportSource to @wrnexus/core,
so islands would otherwise compile to the HTML-string renderer and never
mount. A @jsxImportSource pragma only affects the file carrying it, so
injecting one into the generated entry is not enough — the injection has
to happen per source file. App-authored islands stay plain .tsx.
The JSX test asserts built output rather than generated entry text,
because the entry-text assertion passed while the mechanism did not work.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ClintchizandClaude Opus 5
06df9d66ae