# Vite 8 SSR externalization behavior differs from Rollup official docs external noExternal

Status: search-necessary
Product: Vite 8
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/vite-8-ssr-externalization-behavior-differs-from-rollup
Machine JSON: https://gitdocs.org/api/fixes/vite-8-ssr-externalization-behavior-differs-from-rollup.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

The local workspace gives the symptom and stale integration shape, but the correct repair depends on current official product behavior or recent release notes.

## Fix

```
Verifier accepts a repair record only if it states the current contract and an actionable fix using source-backed product terms.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- Vite 8 SSR externalization behavior differs from Rollup official docs external noExternal
- site:vite.dev/config/ssr-options ssr.external noExternal Vite
- https://vite.dev/config/ssr-options
- Vite 8 SSR externalization Rollup external "ssr.external" "transitive dependencies"
- https://vite.dev/config/ssr-options.md
- https://raw.githubusercontent.com/vitejs/vite/main/docs/guide/migration.md

## Sources

- Vite migration guide: https://vite.dev/guide/migration
- Official reference opened by Codex: https://vite.dev/config/ssr-options
- Official reference opened by Codex: https://vite.dev/config/ssr-options.md
- Official reference opened by Codex: https://raw.githubusercontent.com/vitejs/vite/main/docs/guide/migration.md