Next.js Interview Questions and Answers

Next is a free, lightweight, and opensource react framework for static and server-side rendering. By using Next.js, easy to build a frontend react web Applications.

The list of next.js main features:

• Automatic Routing
• Dynamic Components-Easy to import JavaScript modules and react components dynamically
• Server -side Rendering
• Automatics code splitting for faster page loads
• Source map support
• Single file components
• Static export
• Prefetching
• Simple depolyment
• Full CSS Support-Built in CSS and Pre-processing via Plugins
• Easy to customize babel and webpack configurations
• TypeScript Support-Next.js written in Typescript.
• AMP pages

To Install Next.js, you need have node.js install. (Latest version)

After install NodeJS, Check Below NPM code

npm install –save next react react-dom

Add a build script:

{

  “scripts”: {

    “dev”: “next”,

    “build”: “next build”,

    “start”: “next start”

  }

}

Next,Run

After that, the file-system is the main API. Every .js file becomes a route that gets automatically processed and rendered.

Create a page’s directory inside your project.

Populate ./pages/index.js with the following contents:

function HomePage() {

  return <div>Welcome to Next.js!</div>

}

export default HomePage

Check More: https://nextjs.org/docs/getting-started

• Simple client-side routing
• Generating a static website with Next.js
• Deploy Any ware
• Own webpack configuration
• Server side-Rendering
• Fully extensible
• Lazy loaded modules

SSR stands for Server-side rendering. It is a one of the popular techniques for rendering a normally client-side only single page app (SPA) on the server and then sending a fully rendered page to the client. Server side rendered pages will load faster because the content is available to the browser sooner.

Open next.config.js and add the generateBuildId function      

// next.config.js

module.exports = {

   generateBuildId: async () => {

  // For example get the latest git commit hash here

  return ‘my-build-id’;

  }

};

Add the onDemandEntries config:

module.exports = {

  onDemandEntries: {

    // period (in ms) where the server will keep pages in the buffer

    maxInactiveAge: 25 * 1000,

    // number of pages that should be kept simultaneously without being disposed

    pagesBufferLength: 2,

  },

}

By default, localhost:3000

Next.js is React framework for SSR. There is Angular Universal for SSR with Angular.

You can use any CSS-in-JS solution in your and bundles styled-jsx supporting scoped css.

Create-react-app and next.js project is the routing system since Next.js creates different bundles for each base address. For each route, a separate file is created in the page folder. So, you need to use next/Link component instead of react-router-dom. Also, keep in mind that for static files the static folder is used, but not public, and bundles are located in the folder.next