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Next.js

Major-version breaking changes and API deprecations from release notes.

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Resolves from: next

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Tracked changes

2
  • BreakingAction required

    Next 15: cookies(), headers(), params & searchParams are now async

    Next.js 15 made request APIs (cookies, headers, draftMode) and the params/searchParams props asynchronous. Synchronous access still works with a warning but is removed on the next major.

    published 2024-10-21 · affects ≥ 15.0.0

    Source ↗
  • Deprecation

    App Router: getInitialProps / getServerSideProps not supported in app/

    In the App Router (default since 14), the legacy data-fetching methods do not run; server components + fetch replace them. Pages-router code moved into app/ silently loses data fetching.

    published 2023-05-04 · affects ≥ 13.4.0

    Source ↗

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