nextjs-server-client-components

Server Components are the default in Next.js App Router and handle data fetching, cookies, headers, and server-only APIs. Use Client Components only when you need interactivity; add 'use client' at the top and migrate only the necessary component, keeping data fetching on the server side.

Use Server Components to access searchParams, pathname, and routing information directly. Client Components cannot access these; use 'use client' only for interactive features, and pass routing data from the server parent as props.

Place 'use client' at the top of a component file only when you need browser APIs or event handlers. Server-only APIs like cookies and headers will throw errors if called in Client Components; keep them in Server Components and pass results as props.

Yes. Server Components support async/await for data fetching and Suspense for unwrapping results. This approach keeps data fetching on the server, reducing client-side JavaScript and improving performance compared to Client Components with useEffect.

Use server-side navigation with Link and redirect in Server Components by default. Client-side routing requires 'use client', but server navigation is preferred for better performance and SEO in Next.js App Router.

Cookies and headers are server-only APIs; Client Components cannot access them. Move cookie and header logic to a Server Component parent, fetch the data there, and pass the results as props to your Client Component for rendering or interactivity.