Next.js: A Comprehensive Look at Performance and Features

Next.js is a web development framework that was created by Vercel and provides React-based web applications with server-side rendering and static website generation.

Next.js allows you to style using CSS, precompiled SCSS and Sass, CSS-in-JS, and styled JSX. In addition, it includes TypeScript support and clever bundling. SWC, an open-source transpiler, is used to translate and compile code into browser-compatible JavaScript. Webpack, another open-source program, is used to bundle the modules subsequently, however it is currently being replaced with TurboPack. All of these tools are utilized in a terminal alongside npm.

Features

  • Built-in Optimizations – Automatic Image, Font, and Script Optimizations for improved UX and Core Web Vitals.
  • Data Fetching – Make your React component async and await your data. Next.js supports both server and client data fetching.
  • Node.js & Edge Runtimes – Build scalable solutions with Serverless functions, and deliver fast dynamic, personalized content with the Edge.
  • Advanced Routing & Nested Layouts – Create routes using the file system, including support for more advanced routing patterns and UI layouts.
  • Dynamic HTML Streaming – Instantly stream UI from the server, integrated with the App Router and React Suspense.
  • CSS Support – Style your application with your favorite tools, including support for CSS Modules, Sass, Tailwind CSS, styled-jsx, and more.
  • Route Handlers – Build API endpoints to securely connect with third party services and consume from your frontend.
  • Middleware – Take control of the incoming request. Use code to define routing and access rules for authentication, experimentation, and internationalization.
  • React Server Components – Add components without sending additional client-side JavaScript. Built on the latest React features.
  • Client and Server Rendering – Flexible rendering and caching options, including Incremental Static Regeneration (ISR), on a per-page level.

Installation

npx create-next-app@latest

On installation, you’ll see the following prompts:

What is your project named? my-app
Would you like to use TypeScript? No / Yes
Would you like to use ESLint? No / Yes
Would you like to use Tailwind CSS? No / Yes
Would you like to use `src/` directory? No / Yes
Would you like to use App Router? (recommended) No / Yes
Would you like to customize the default import alias (@/*)? No / Yes
What import alias would you like configured? @/*

Manual Installation

npm install next@latest react@latest react-dom@latest

Open your package.json file and add the following scripts:

{
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  }
}

Create a root layout inside app/layout.tsx with the required <html> and <body> tags:

export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <html lang="en">
      <body>{children}</body>
    </html>
  )
}

Finally, create a home page app/page.tsx with some initial content:

export default function Page() {
  return <h1>Hello, Next.js!</h1>
}

Run the Development Server

  • Run npm run dev to start the development server.
  • Visit http://localhost:3000 to view your application.
  • Edit app/page.tsx (or pages/index.tsx) file and save it to see the updated result in your browser.

Next.js can be deployed to any hosting provider that supports Node.js. Ensure your package.json has the "build" and "start" scripts:

{
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start"
  }
}

Next.js Project Structure

NextJs Learning

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