next-best-practices

To prevent hydration mismatches in Next.js App Router, validate Server and Client component boundaries to ensure non-serializable props are not passed between them. This practice avoids client-server markup differences that cause runtime hydration errors during page rendering.

The best way to handle async params and searchParams in React Server Components is to await Next.js 15+ request APIs directly on the server. Using correct async patterns prevents suspense bailouts and ensures data is fully resolved before stream completion.

Route handler and server action conflicts occur when file conventions are incorrectly structured. Enforcing correct App Router special file naming and route segment boundaries prevents 404s, routing bugs, and unexpected request routing behavior between handlers and actions.

You cannot pass functions from a Server Component to a Client Component in Next.js. Validating Server and Client boundaries detects non-serializable props like functions, preventing serialization failures and ensuring correct React Server Component behavior.

Fix suspense bailouts in Next.js by applying correct async API patterns for Next.js 15+ request APIs within your React Server Components. Ensuring proper await usage and suspense boundary placement prevents stream suspensions and runtime performance regressions.