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 …

By now, you know the basics of how to write React code! Check out the Tutorial to put them into practice and build your first mini-app with React.

React 应用程序是由 组件 组成的。一个组件是 UI（用户界面）的一部分，它拥有自己的逻辑和外观。组件可以小到一个按钮，也可以大到整个页面。 React 组件是返回标签的 JavaScript 函数：

React integrates with tools like editors, TypeScript, browser extensions, and compilers. This section will help you get your environment set up.

¡En este punto ya conoces los elementos básicos de como escribir código en React! Prueba el Tutorial para ponerlos en práctica y construir tu primera miniaplicación de React.

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 …

Dec 5, 2024 · React 19 is now stable! Additions since this post was originally shared with the React 19 RC in April: Pre-warming for suspended trees: see Improvements to Suspense. …

If you want to build your own solutions, see our guide to build a React app from Scratch for instructions on how to set up a new React project starting with a build tool like Vite, Parcel, or …

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 …

In React, you can conditionally render JSX using JavaScript syntax like if statements, &&, and ? : operators. You will learn How to return different JSX depending on a condition