Introduction to Next.js 14 App Router
Next.js 14 introduces the stable App Router, a new paradigm for building React applications with improved performance and developer experience.
App Router vs Pages Router
The App Router brings several advantages:
- Server Components for better performance
- Streaming UI updates
- Nested layouts
- Built-in loading states
- Automatic error handling
File-based Routing Structure
The App Router uses a file-based routing system with special files like layout.tsx, page.tsx, loading.tsx, and error.tsx.
Server Components and Client Components
Understanding when to use Server vs Client Components:
// Server Component (default)
export default async function BlogPost({ params }) {
const post = await fetchPost(params.slug);
return (
<article>
<h1>{post.title}</h1>
<p>{post.content}</p>
</article>
);
}Data Fetching Patterns
Next.js 14 provides multiple ways to fetch data with different caching strategies.
Performance Optimization
Optimize your Next.js 14 application with image optimization, font optimization, and proper caching strategies.
Conclusion
Next.js 14's App Router represents a significant evolution in React development, offering improved performance and better developer experience.