migrate-to-app-router

To migrate Next.js Pages Router routes to the App Router, create an app directory structure with page.tsx for server components, then move data fetching logic server-side and update navigation using next/navigation.

Data fetching in the Next.js App Router defaults to server components, allowing you to move fetches directly into page.tsx files. This reduces client-side code and modernizes data fetching discipline across the application.

Handle loading and error states during a Next.js App Router migration by implementing dedicated loading.tsx and error.tsx files alongside your page.tsx, ensuring UX resilience and granular route-level fallbacks.

Yes, you need to update auth guards when migrating Next.js routes to the App Router by adapting them to respect server and client boundaries, utilizing next/navigation for updated guard logic and route protection.

Yes, you can retrofit a large Next.js application using step-by-step conversion to move legacy pages to the app structure, unifying routing patterns while enforcing server components by default to reduce client-side code.

Limitations include strictly enforcing server components by default, which requires carefully managing client and server boundaries, updating metadata conventions, and restructuring route files to avoid breaking existing navigation.