nextjs-15

Next.js 15 App Router conventions structure files under the app/ directory using layout.tsx, page.tsx, loading.tsx, error.tsx, and not-found.tsx to define routing, UI boundaries, and async states for your application routes.

Server Components handle data fetching directly on the server, while Server Actions manage mutations by allowing asynchronous functions to execute server-side, streamlining data modification without creating separate API endpoints.

Route handlers defined via api/route.ts patterns create API endpoints in Next.js 15, and middleware intercepts requests to apply routing logic, authentication, or redirects before route rendering completes.

Yes, the Next.js App Router supports dynamic routing patterns, allowing developers to generate dynamic route segments and handle complex URL structures directly within the app/ directory structure.

You need loading.tsx to display immediate UI during data fetching or chunk loading, and error.tsx to catch and handle unexpected errors within specific route segments, ensuring application resilience.