Nuxt 4 Breaking Changes Guide

Key breaking changes include src/ directory opt-in, renamed composables (useFetchNative → useFetch), stricter TypeScript defaults, Nitro v3 server API (event vs req/res), and mandatory app/ directory structure. Use official codemods (npx nuxi migrate) and update nuxt.config.ts paths for smooth transition.

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What breaking changes in Nuxt 4 require migration attention?

Key breaking changes include src/ directory opt-in, renamed composables (useFetchNative → useFetch), stricter TypeScript defaults, Nitro v3 server API (event vs req/res), and mandatory app/ directory structure. Use official codemods (npx nuxi migrate) and update nuxt.config.ts paths for smooth transition.