What I Learned from Next.js App Router

Next.js App Router changed how I build React applications.

Earlier, routing felt separate from logic.
Now, routing, layouts, and data fetching feel connected.

What I Learned

The biggest shift was understanding server vs client components.

Not everything needs to run on the client.
Moving logic to the server improved performance and code clarity.

Layouts & Structure

Layouts helped me avoid repeated code.

Instead of wrapping components manually, layouts gave me:

• Cleaner folder structure
• Shared UI
• Better scalability

Loading & Error Handling

Using loading.tsx and error.tsx was a game changer.

Now users see instant feedback instead of blank screens.

Final Thought

App Router feels more production-ready.

Once I understood the mental model, my apps became faster, cleaner, and easier to maintain.