Files
bun.sh/test/regression/issue
Tommy D. Rossi 538be1399c feat(bundler): expose reactFastRefresh option in Bun.build API (#25731)
Fixes #25716

Adds support for a `reactFastRefresh: boolean` option in the `Bun.build`
JavaScript API, matching the existing `--react-fast-refresh` CLI flag.

```ts
const result = await Bun.build({
    reactFastRefresh: true,
    entrypoints: ["src/App.tsx"],
});
```

When enabled, the bundler adds React Fast Refresh transform code
(`$RefreshReg$`, `$RefreshSig$`) to the output.
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