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Next.JS is a framework for building React Applications.
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To build make Big Applications Next.js is a suitable choice.
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We don't need anymore use of react file routing, it can handle automatically.
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It has SEO tools as well as different ways of rendering data.
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It provides API routes, so that we can have back-end and front-end code in the same project.
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We can see additonal features like router from next/navigation
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We also see the optimized rendering.
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The App Router is a new routing system introduced in Next.js 13. It replaces the previous file-based routing system and introduces several new features and improvements. Here are some of the key reasons why Next.js introduced the App Router.
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The App Router (in app/) was introduced in Next.js 13+ to improve flexibility, reusability, and performance.
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It allows for more dynamic routing, nested layouts, and server actions.
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It also provides better SEO support and improved developer experience.
| Feature | Pages-Based (pages/) |
App-Based (app/) |
|---|---|---|
| Introduced In | Before Next.js 13 | Next.js 13+ |
| Routing Style | File = Route | Folder + File = Route |
| Dynamic Routes | [param].js |
[param]/page.js |
| Layouts | _app.js (global only) |
layout.js (nested layouts) |
| Data Fetching | getServerSideProps |
Server components (async) |
| Server Components | No | Yes |
| Customizable Loading States | No | loading.js support |
| SEO Optimizations | Manual | Automatic with head.js |