# React
* 英文官网：[React – A JavaScript library for building user interfaces (reactjs.org)](https://reactjs.org/)
* 中文官网：[React 官方中文文档 – 用于构建用户界面的 JavaScript 库 (reactjs.org)](https://zh-hans.reactjs.org/)
* Github：[facebook/react: A declarative, efficient, and flexible JavaScript library for building user interfaces. (github.com)](https://github.com/facebook/react)
由Facebook开源的用于动态构建用户界面的 JavaScript 库(只关注于视图)。
## 特点
1. 声明式编码
2. 组件化编码
3. React Native 编写原生应用
4. 高效
1. 使用虚拟DOM，不总直接操作真实DOM
2. DOM Diffing算法，最小页面重绘
## 安装React
1. `react.js`：React核心库。
2. `react-dom.js`：提供操作DOM的react扩展库。
3. `babel.min.js`：解析JSX语法代码转为JS代码的库。
## Hello World
### 非JSX方式
```html
Document
```
### JSX方式
```html
Document
```
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