Next.js App Router: Patterns That Actually Work

The App Router introduced a paradigm shift. Here are the patterns I've found most useful in production.

Server Components by Default

Think server-first. Only add 'use client' when you need interactivity, browser APIs, or React hooks. This dramatically reduces your JavaScript bundle.

Loading States

Use loading.js files for instant feedback. Combine with Suspense boundaries for granular loading states.

Error Handling

Implement error.js at every route level. It catches errors gracefully without breaking the entire page.

Data Fetching

Fetch data in Server Components. Use the cache and revalidation APIs for optimal performance.

Conclusion

The App Router is powerful once you understand its mental model. Server Components are the future.