Next.js Tutorial

Next.js is an open-source framework based on React for building fast, modern web applications.

Next.js is used to build modern web applications with high-performance server-side rendering (SSR) and static generation.

Next.js is developed and maintained by Vercel, aiming to simplify the development process of React applications while providing powerful performance optimization and developer experience.

Relationship with React

React is a JavaScript library for building user interfaces, while Next.js is a framework built on top of React.

React focuses on building UI components, whereas Next.js provides more features and structure, helping developers solve some development issues that are cumbersome in React, such as routing, data fetching, and page rendering.

Who is this tutorial for?

As long as you have basic knowledge of HTML and CSS, you can read this tutorial and then develop your own website.

Next.js is not only suitable for individual developers to quickly set up projects, but also for large teams to build complex full-stack applications.

Next.js has a relatively low barrier to entry. It is built on React, which is one of the most popular front-end frameworks today.

If you already have some understanding of React, learning Next.js will be easier.

Prerequisites for reading this tutorial:

Before you start reading this tutorial, you must have basic knowledge of HTML, CSS, and JavaScript. If you are not yet familiar with these concepts, we recommend that you first read these tutorials:

Next.js Examples

By default, Next.js creates an index.js file in the pages folder. This is the home page of the application. We can modify the code of this file to the following:

Next.js Examples

export default function Home() { return <div>Hello, World!</div>; }

Key Features

  • File-system routing:Next.js uses the file system to automate route creation. You just need topagescreate files under the directory, and they will automatically map to the corresponding routes, requiring no additional route configuration.
  • Static Generation (SSG) and Server-Side Rendering (SSR):Next.js supports both rendering methods, allowing flexible selection as needed. Static generation is suitable for most cases, especially pages whose content does not change frequently, while SSR is suitable for pages that need to fetch data dynamically.
  • API routes:Next.js allows you to create API routes directly in your application. You canpages/apieasily create backend API endpoints under the directory, handling front-end and back-end logic.
  • Automatic code splitting:Each page only loads the JavaScript code it needs, ensuring faster application startup and reducing unnecessary resource consumption.
  • Image optimization:Next.js has built-in image optimization functionality. Using thenext/imagecomponent can automatically select the best format, compression, lazy loading, etc. for images to improve page loading performance.
  • TypeScript support:Next.js supports TypeScript by default, allowing developers to enjoy stronger type checking during development.

Reference Links

Next.js official website:https://nextjs.org/

Next.js official documentation:https://nextjs.org/docs

GitHub source code:https://github.com/vercel/next.js

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