nextjs-app-router-fundamentals

Next.js App Router migration involves adopting new file conventions for nested routing, restructuring layouts, and adjusting component boundaries to support server components and metadata management in Next.js 13+.

Server components and client components in the Next.js App Router differ by execution location; this guidance establishes clear conventions and best practices for structuring both to ensure scalable and maintainable apps.

Handling dynamic routes and route groups in Next.js 13+ requires using specific App Router file conventions to organize nested routing structures and manage metadata without affecting the URL path.

The best way to manage metadata in a Next.js App Router application is using the built-in metadata API within your layout and route files to define requirements for proper metadata handling across the app.

You do not need to scaffold a completely new app; you can set up App Router in an existing Next.js 13+ project by creating a root layout and incrementally migrating routes from the Pages Router.