React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your …

React 是什麼？ React 是一個陳述式、高效且具有彈性的 JavaScript 函式庫，用以建立使用者介面。 它讓你使用小巧而獨立的「component」，來建立複雜的 UI。 React 有數種不同的 …

If you choose not to assign an explicit key to list items then React will default to using indexes as keys. Here is an in-depth explanation about why keys are necessary if you’re interested in …

Note that this functionality is not a part of React, but provided by third-party libraries. React does not have an opinion about how styles are defined; if in doubt, a good starting point is to define …

Key は、どの要素が変更、追加もしくは削除されたのかを React が識別するのに役立ちます。 配列内の項目に安定した識別性を与えるため、それぞれの項目に key を与えるべきです。

Our React applications continuously modify the HTML DOM during runtime, sometimes leading to keyboard focus being lost or set to an unexpected element. In order to repair this, we need to …

In this guide, we will examine the building blocks of React apps: elements and components. Once you master them, you can create complex apps from small reusable pieces.

React Versions A complete release history for React is available on GitHub. Documentation for recent releases can also be found below. See our FAQ for information about our versioning …

React 测试库 是一组能让你不依赖 React 组件具体实现对他们进行测试的辅助工具。 它让重构工作变得轻而易举，还会推动你拥抱有关无障碍的最佳实践。

如果你使用 <script> 標籤載入 React,這些頂層 API 可以在 React 全域變數使用。 如果你使用 ES6 撰寫並使用 npm，你可以寫成 import React from 'react' 。