Introduction

Next.js 14 introduced a paradigm shift in how we build React applications. The App Router is built on top of React Server Components (RSC), allowing for granular caching, streaming, and improved performance.

Key Features

1. Server Components: Render components on the server by default.
2. Streaming: Instantly render parts of the UI as they become ready.
3. Server Actions: Mutate data directly from components without API routes.

Code Example

Here is a simple Server Component:

async function getData() {
  const res = await fetch('https://api.example.com/data')
  return res.json()
}

export default async function Page() {
  const data = await getData()
 
  return <main>{data.message}</main>
}

Conclusion

The App Router simplifies data fetching and layout management, making it easier to build complex applications.