chore(deps-dev): bump nuxt from 3.21.8 to 4.5.0

[dependabot]

Bumps nuxt from 3.21.8 to 4.5.0.

Release notes

Sourced from nuxt's releases.

v4.5.0

4.5.0 is the next minor release.

📣 Some News

Preparing for Nuxt 5

A good chunk of this release is (hopefully) invisible plumbing for Nuxt 5. We've moved onto the latest major versions of several core dependencies (unhead v3, unctx v3, and Vite 8), switched the framework's own build over to tsdown, and introduced a stable nuxt/* build output contract with dev exports so that type-checking in the Nuxt monorepo works without a build step (#35463, #35605).

Much of this is working to shrink the gap between v4 and v5 internally, so that the migration will be as boring as possible.

[!TIP] If you want to test some of the breaking changes of Nuxt v5, you can already opt in with future.compatibilityVersion: 5. Keep an eye on the Upgrade Guide for details as they land.

With the release of Nuxt v4.5, our focus as a team will turn to stabilising Nuxt v5 and creating compatibility utilities to make the upgrade as smooth as possible.

Nuxt 3 End-of-Life

Nuxt 3 reaches end-of-life on July 31, 2026, so this is one of the last few 3.x releases we'll ship. If you're still on v3, now is a great time to move across. Most people told us the v3 to v4 upgrade was smooth, and we've kept the upgrade guide up to date.

Alongside v4.5.0 we're publishing a maintenance patch for the 3.x line (v3.21.9) with the compatible bug fixes and smaller improvements from this release backported. The headline items here (Vite 8, Rspack 2, unhead v3, unctx v3) are major upgrades and stay v4-only, so 3.x remains stable as it approaches end-of-life.

👀 Highlights

Nuxt 4.5 is a big one. This release ships three major upgrades to the build layer (Vite 8, Rspack 2, and a brand new Rsbuild-powered pipeline for the Rspack builder), an experimental SSR streaming mode, a handful of new composables and conventions, and a lot of groundwork that brings us closer to Nuxt 5.

There's a lot here, so grab a coffee. ☕️

⚡️ Vite 8

Nuxt now runs on Vite 8 (#34256). This brings faster cold starts, the latest Rolldown-powered internals, and many upstream improvements from the Vite team.

For most apps this is a transparent upgrade. If you have custom Vite plugins or config, it's worth skimming the Vite migration guide to check for anything that affects you.

[!WARNING] Vite 8 is a major version bump. If you depend on Vite directly (custom plugins, vite.config tweaks, or ecosystem plugins that pin a Vite version), make sure those are compatible before upgrading in production.

🦀 Rspack 2 and Rsbuild

If you use the Rspack builder, this release is a substantial upgrade. We've moved to Rspack 2 (#34929), which is faster and lighter, and rebuilt the builder on top of @rsbuild/core (#35489).

The public surface stays the same. You still opt in with builder: 'rspack' and the existing rspack:* hooks continue to work:

// nuxt.config.ts
export default defineNuxtConfig({
  builder: 'rspack',
})

... (truncated)

Commits

• 5761457 v4.5.0
• b5f9830 feat(nuxt): warn when parent page lacks NuxtPage (#35639)
• 76cb01d fix(nuxt): update client URL to match SSR on fatal middleware error (#35637)
• 6d94a14 fix(nuxt): apply latest navigation on concurrent navigateTo in built-in rou...
• d566626 feat(nuxt): require keyed function 'source' with compatibilityVersion 5
• c699cc0 fix(nuxt): drop extension on diagnostics import
• 881e5ef feat: error code system (#35429)
• 379c22f feat(nuxt): support enabled option in useFetch (#35627)
• 353164b fix(nuxt): re-add computeIslandHash for backwards compatibility
• 881d5c4 docs: clarify usage of await with useFetch (#33745)
• Additional commits viewable in compare view

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