Next.js Introduction (original) (raw)

Last Updated : 25 Feb, 2026

Next.js is a framework built on top of React that makes it easier to create fast and modern websites. It handles things like page rendering, routing, and performance automatically, so developers can focus on building features.

next_js

"Hello, World!" Program in Next.js

JavaScript `

// pages/index.js export default function Home() { return (

Hello, World!

); }

`

**Output

Screenshot-2025-03-21-163019

_Before starting to learn Next.js we need to _install Next.js _on our system

Working of Next.js

Next.js works as a bridge between the server and the browser. It decides how pages are rendered and delivered, ensuring speed, SEO, and a smooth user experience.

working_of_next_js

Node.js

Next.js Framework

React Components

Browser (Client-Side)

This is how Next.js works to deliver fast and optimized web applications.

React Vs Next.js

Both are popular choices for web development, but they serve different purposes and offer different levels of functionality.

**React.js:

Example of building a blog page with Reactjs:

jsx `

// React.js import React, { useEffect, useState } from "react"; import { BrowserRouter as Router, Route } from "react-router-dom";

function Blog() { const [posts, setPosts] = useState([]);

useEffect(() => { fetch("/api/posts") .then(res => res.json()) .then(data => setPosts(data)); }, []);

return (

My Blog

{posts.map(post =>

{post.title}

)}
); }

export default Blog;

`

In React.js, you need extra libraries (like React Router) and client-side fetching, which can hurt SEO.

**Next.js:

// Next.js export default function Blog({ posts }) { return (

My Blog

{posts.map(post =>

{post.title}

)}
); }

export async function getServerSideProps() { const res = await fetch("https://example.com/api/posts"); const posts = await res.json(); return { props: { posts } }; }

`

In Next.js, you get built-in routing and server-side rendering, making your app faster and SEO-friendly with less setup.

History of Next.js

Applications of Next.js

Features of Next.js

Next.js comes with **powerful built-in features like SSR, SSG, API routes, and file-based routing that make development faster and easier.