CuratedTypeScriptVite 8local

No replacement documented for removed build.rollupOptions.output.experimentalMinChunkSize in Vite 8

Problem

Migrating from Vite 7 to Vite 8, `build.rollupOptions.output.experimentalMinChunkSize` (used to merge small Rollup output chunks) is silently gone with no equivalent mentioned in the v7-to-v8 migration guide, leaving projects with many tiny generated chunks after switching to Rolldown.

Solution

typescript

There is no direct 1:1 replacement, but Rolldown's `output.codeSplitting` options can approximate it. Example config to merge small chunks similar to `experimentalMinChunkSize: ~3500`:
```js
build: {
  rolldownOptions: {
    output: {
      codeSplitting: {
        groups: [
          { name: 'shared', minShareCount: 1, entriesAware: true, entriesAwareMergeThreshold: 6000 }
        ]
      }
    }
  }
}
```
Combine with `output.chunkFileNames`/`entryFileNames` for shorter names. A contributor confirmed this produces comparable output size, though not byte-identical to the old option; expect trial-and-error tuning per project.