nextjs-app-router-patterns

Fetch data directly inside Next.js App Router Server Components to execute securely on the server. This approach simplifies data fetching by eliminating client-side fetching boilerplate and enables automatic request memoization.

Use Server Components by default for static rendering and direct data fetching. Add Client Components only when you need interactivity, state, or browser APIs like event listeners, keeping your JavaScript bundle minimal.

Handle data mutations in Next.js 14 using Server Actions. They allow you to write server-side mutation logic directly, supporting progressive enhancement and secure form submissions without creating dedicated API endpoints.

Use parallel routes in the App Router to render multiple pages simultaneously in named slots. Intercepting routes allow you to load contextual UI like modals by intercepting the default navigation path.

Yes, you can wrap dynamic Server Components in React Suspense to enable streaming in Next.js. This progressively sends HTML to the client, improving perceived performance by showing fallback UI while data loads.

Tag-based invalidation in Next.js associates cached ISR data with specific tags. You call revalidateTag to purge associated cache entries on demand, ensuring users receive fresh content immediately after mutations.