React
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 components written by independent people, teams, and organizations.
Quick Start – React
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.
快速入门 – React 中文文档 - docschina.org
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：
Installation – React - code++
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 get started.
Tutorial: Tic-Tac-Toe – React
Overview will teach you the fundamentals of React: components, props, and state. Completing the game will teach you the most common techniques in React development. Adding time travel will give you a deeper insight into the unique strengths of React. What are you building? In this tutorial, you’ll build an interactive tic-tac-toe game with React.
Conditional Rendering – React - code++
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
Built-in React Hooks – React
Hooks let you use different React features from your components. You can either use the built-in Hooks or combine them to build your own. This page lists all built-in Hooks in React.
React 官方中文文档
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 components written by independent people, teams, and organizations.
React Developer Tools
Use React Developer Tools to inspect React components, edit props and state, and identify performance problems.
クイックスタート – React
useState は React が提供する組み込みのフックです。 API リファレンス で他の組み込みフックを見ることができます。 また、既存のフックを組み合わせて独自のフックを作成することもできます。