React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine …

You can use as little or as much React as you need. Whether you want to get a taste of React, add some interactivity to an HTML page, or start a complex React-powered app, this section will help you …

Quick Start Welcome to the React documentation! This page will give you an introduction to 80% of the React concepts that you will use on a daily basis.

Server APIs - The react-dom/server APIs let you render React components to HTML on the server. Static APIs - The react-dom/static APIs let you generate static HTML for React components.

React 并没有规定你如何添加 CSS 文件。 最简单的方式是使用 HTML 的 <link> 标签。 如果你使用了构建工具或框架，请阅读其文档来了解如何将 CSS 文件添加到你的项目中。 显示数据 JSX 会让你把 …

In 2023, we launched our new docs for React 18 as react.dev. The legacy React 18 docs are available at legacy.reactjs.org. Versions 17 and below are hosted on legacy sites.

If your app has constraints not well-served by existing frameworks, you prefer to build your own framework, or you just want to learn the basics of a React app, you can build a React app from scratch.

React-based frameworks take this a step further. Instead of using an empty HTML file and letting React “take over” managing the page with JavaScript, they also generate the HTML automatically from your …

This was a very brief introduction to how to think about building components and applications with React. You can start a React project right now or dive deeper on all the syntax used in this tutorial.

React 哲学 React 可以改变你对可见设计和应用构建的思考。 当你使用 React 构建用户界面时，你首先会把它分解成一个个 组件，然后，你需要把这些组件连接在一起，使数据流经它们。 在本教程中， …