fix(vite): add support for Vite 8

[robert-sidzinka]

Current Behavior

The @nx/vite plugin only supports Vite 5, 6, and 7. Users on Vite 8 get peer dependency errors:

peer vite@"^5.0.0 || ^6.0.0 || ^7.0.0" from @nx/vite

Expected Behavior

Full Vite 8 support for new and existing workspaces:

Nx plugin support:

• Update peer deps to include ^8.0.0 in @nx/vite and @nx/vitest
• Default new workspaces to Vite 8 (viteVersion = '^8.0.0')
• Bump @vitejs/plugin-react to ^6.0.0 (required for Vite 8, uses Oxc instead of Babel)
• Add useViteV7 backward compatibility flag (follows existing useViteV5/useViteV6 pattern)

Rolldown migration (Vite 8 replaced Rollup with Rolldown):

• Handle both rollupOptions (Vite <8) and rolldownOptions (Vite >=8) in build executor and plugin detection
• Fix build executor environments API to preserve env-specific rolldownOptions config
• Update e2e tests for Rolldown's different module counts

Type fixes for Vite 8's ESM-only declarations:

• Vite 8 ships .d.mts type declarations not resolvable under moduleResolution: "node"
• Fix typeof import('vite') and import type usages across @nx/vite, @nx/vitest, @nx/cypress, @nx/react, @nx/angular, @nx/remix with inline casts
• All fixes have TODO(jack) comments to remove when switching to moduleResolution: "nodenext"

Plugin compatibility:

• @vitejs/plugin-react@^6.0.0 only supports Vite 8; ^4.2.0 for Vite <=7
• ensure-dependencies detects installed vite version and picks the correct plugin-react version
• Cypress CT does not support Vite 8 yet — e2e test downgrades to Vite 7

Angular vitest fix:

• @angular/build depends on rolldown which injects @oxc-project/runtime helpers at transform time without declaring it as a dependency
• Add @oxc-project/runtime as an explicit devDependency in the Angular vitest generator

Docs:

• Updated supported versions table to include ^8.0.0
• Added rolldownOptions.input to buildable project detection docs

E2E coverage:

• New Vite 8 + React build/test e2e test
• New Vite 7 + React backward compat e2e test (downgrades vite + plugin-react)
• Updated environments API test for Vite 8 rolldownOptions
• Updated incremental build test for Rolldown's module counts
• Cypress CT e2e downgrades to Vite 7 (Cypress doesn't support Vite 8 yet)

Other notes

We'll do a follow-up PR to include migrations for 22.7.0. This PR's scope is only to ensure peer deps and our generators work for workspaces that are already using Vite 8.

Related Issue(s)

Fixes #34849

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[robert-sidzinka]

Hi team! The Vercel deployment check is showing as failed, but this PR only touches files in packages/vite/ and packages/vitest/ — no docs or site changes. Could a maintainer check if the Vercel failure is unrelated to this PR?

Also, the Netlify deploy previews are pending review (expected for fork PRs).

Thanks!

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View your CI Pipeline Execution ↗ for commit 51041b9

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☁️ Nx Cloud last updated this comment at 2026-03-25 15:03:17 UTC

[jaysoo]

Hi @rsidzinkaloopme , thanks for the PR. I'll check on the CI blocker.

[robert-sidzinka]

Hi @jaysoo I was trying to add support for Vite 8, but I think it requires more effort than I initially though, because Vite 8 started using rolldown, currently I don't have time to work on this issue, hope someone can pick this up.

[jaysoo]

@rsidzinkaloopme I'll update this PR so we can release it in a patch release. It'll handle the peer dep changes, and any potential fork in logic we need for Vite 8 and prior versions.

In a follow-up PR we will do the migrate/package update, AI migrations, etc. needed to bring everyone to Vite 8.

[nx-cloud]

Nx Cloud has identified a flaky task in your failed CI:

Since the failure was identified as flaky, the solution is to rerun CI. Because this branch comes from a fork, it is not possible for us to push directly, but you can rerun by pushing an empty commit:

git commit --allow-empty -m "chore: trigger rerun"
git push

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