---
title: "What is NextJs Framework?"
description: "What is NextJs Framework?"
author: "ICSM Computer"
published: 2025-06-03
updated: 2025-06-03
canonical: https://www.mindstick.com/interview/34203/what-is-nextjs-framework
category: "javascript"
tags: ["javascript"]
reading_time: 4 minutes
---
# What is NextJs Framework?
**Next.js** is a popular open-source React framework for building modern web applications with powerful features out of the box.
### What is Next.js?
- **Built on React:** Next.js is a framework that extends React by adding server-side rendering and many other advanced features.
- **Hybrid rendering:** Supports **Server-Side Rendering (SSR)**, **Static Site Generation (SSG)**, and **Client-Side Rendering (CSR)** — all in one framework.
- **File-based routing:** Pages are created by adding React components in the `pages/` folder — automatically mapped to routes.
- **API routes:** You can create backend API endpoints directly in the Next.js project.
- **Optimized performance:** Automatic code splitting, image optimization, and fast page loads.
- **Built-in CSS and Sass support:** Plus support for CSS-in-JS libraries.
- **Full-stack capabilities:** Build frontend and backend logic together.
- **Easy deployment:** Works smoothly with platforms like Vercel (creator of Next.js) for instant deployment.
### Key features of Next.js
| Feature | Description |
| --- | --- |
| Server-Side Rendering (SSR) | Render pages on the server per request for SEO and speed |
| Static Site Generation (SSG) | Pre-render pages at build time for fast static websites |
| API Routes | Build backend API endpoints as part of your app |
| File-based Routing | Route pages by file names automatically |
| Image Optimization | Automatic image resizing and optimization |
| Incremental Static Regeneration | Update static pages after build without full rebuild |
| TypeScript Support | Built-in support for TypeScript |
### Who uses Next.js?
- Developers building React apps that need SEO, fast performance, or backend API functionality.
- Teams wanting to build scalable full-stack web apps.
- Projects that require a mix of static and dynamic content.
### Simple example
```javascript
// pages/index.js
export default function Home() {
return Welcome to Next.js!
}
```
This creates a homepage automatically accessible at `/`.
## Answers
### Answer by ICSM Computer
**Next.js** is a popular open-source React framework for building modern web applications with powerful features out of the box.
### What is Next.js?
- **Built on React:** Next.js is a framework that extends React by adding server-side rendering and many other advanced features.
- **Hybrid rendering:** Supports **Server-Side Rendering (SSR)**, **Static Site Generation (SSG)**, and **Client-Side Rendering (CSR)** — all in one framework.
- **File-based routing:** Pages are created by adding React components in the `pages/` folder — automatically mapped to routes.
- **API routes:** You can create backend API endpoints directly in the Next.js project.
- **Optimized performance:** Automatic code splitting, image optimization, and fast page loads.
- **Built-in CSS and Sass support:** Plus support for CSS-in-JS libraries.
- **Full-stack capabilities:** Build frontend and backend logic together.
- **Easy deployment:** Works smoothly with platforms like Vercel (creator of Next.js) for instant deployment.
### Key features of Next.js
| Feature | Description |
| --- | --- |
| Server-Side Rendering (SSR) | Render pages on the server per request for SEO and speed |
| Static Site Generation (SSG) | Pre-render pages at build time for fast static websites |
| API Routes | Build backend API endpoints as part of your app |
| File-based Routing | Route pages by file names automatically |
| Image Optimization | Automatic image resizing and optimization |
| Incremental Static Regeneration | Update static pages after build without full rebuild |
| TypeScript Support | Built-in support for TypeScript |
### Who uses Next.js?
- Developers building React apps that need SEO, fast performance, or backend API functionality.
- Teams wanting to build scalable full-stack web apps.
- Projects that require a mix of static and dynamic content.
### Simple example
```javascript
// pages/index.js
export default function Home() {
return Welcome to Next.js!
}
```
This creates a homepage automatically accessible at `/`.
---
Original Source: https://www.mindstick.com/interview/34203/what-is-nextjs-framework
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