Next.js 14 App Router: Complete Guide

Next.js 14 App Router: Complete Guide

Next.js 14 introduces significant improvements to the App Router. Let's explore what's new and how to use it effectively.

Understanding the App Router

The App Router is the new way to build applications in Next.js. It provides a more intuitive file-based routing system.

File Structure ``` app/ ├── layout.tsx ├── page.tsx ├── dashboard/ │ ├── layout.tsx │ └── page.tsx └── api/ └── route.ts ```

Layouts and Nesting

Layouts allow you to share UI across multiple pages. They're perfect for navigation, sidebars, and other persistent elements.

Server Components

Server Components are the default in the App Router. They allow you to fetch data directly in your components.

API Routes

Creating API endpoints is straightforward with the new route handlers.

Performance Improvements

The App Router includes several performance optimizations out of the box.

Migration Guide

If you're coming from the Pages Router, here's how to migrate your application.

Conclusion

The App Router is a powerful addition to Next.js. Start using it in your new projects today.