Why Next.js over plain React

Introduction

Next.js helps you build React apps faster with built-in features like server-side rendering and routing. It makes your app load quicker and work better on search engines.

When you want your React app to load faster by showing pages from the server first.

When you need automatic page routing without setting it up yourself.

When you want to improve your website's SEO so search engines find your content easily.

When you want to build both static and dynamic pages in the same app.

When you want to use modern React features with less setup.

Syntax

NextJS

import Link from 'next/link';

export default function Home() {
  return (
    <main>
      <h1>Welcome to Next.js!</h1>
      <Link href="/about">Go to About Page</Link>
    </main>
  );
}

Next.js uses file-based routing: each file in the app or pages folder becomes a route automatically.

Next.js supports server components and client components to optimize loading.

Examples

This is a simple React component without Next.js features.

NextJS

export default function Page() {
  return <h1>Hello from React!</h1>;
}

Next.js lets you use Link for fast client-side navigation between pages.

NextJS

import Link from 'next/link';

export default function Home() {
  return (
    <div>
      <h1>Home Page</h1>
      <Link href="/contact">Contact Us</Link>
    </div>
  );
}

Next.js can fetch data on the server before rendering the page, so users see fresh content immediately.

NextJS

export async function getServerSideProps() {
  return { props: { time: new Date().toISOString() } };
}

export default function TimePage({ time }) {
  return <p>Current server time: {time}</p>;
}

Sample Program

This simple Next.js component shows a home page with a link to another page. The link uses Next.js routing for fast navigation.

NextJS

import Link from 'next/link';

export default function Home() {
  return (
    <main>
      <h1>Welcome to Next.js!</h1>
      <p>This page loads fast and is SEO friendly.</p>
      <Link href="/about">Go to About Page</Link>
    </main>
  );
}

Important Notes

Next.js handles routing automatically, so you don't need extra libraries for navigation.

Server-side rendering in Next.js helps your app load content faster and improves SEO.

You can mix static and dynamic pages easily in Next.js without complex setup.

Summary

Next.js adds powerful features on top of React to make apps faster and easier to build.

It automatically handles routing and server rendering for better performance and SEO.

Using Next.js means less setup and more focus on building your app's features.