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                # **安裝** 1.獨立版本:自行下載 * [react.development.js](https://unpkg.com/react@16.11.0/umd/react.development.js):React的核心庫 * [react-dom.development.js](https://unpkg.com/react-dom@16.11.0/umd/react-dom.development.js):提供與 DOM操作相關的功能 * [babel.js](https://unpkg.com/@babel/standalone@7.6.4/babel.js):將 ES6 代碼轉為 ES5代碼,內嵌了對 JSX 的支持 2.CDN: ``` <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script> <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script> <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script> ``` 3.NPM:在安裝了nodejs的情況下,命令行(cmd)工具中 ``` node -v // 檢查是否安裝node npm install react // 淘寶鏡像可以使用cnpm ``` ![](https://img.kancloud.cn/8c/e1/8ce18cfbf8cc0402818339ce17293b41_840x548.png) ![](https://img.kancloud.cn/a4/da/a4dae71a35d781d97e21de2371107598_879x612.PNG) # **使用** 第一個React實例 [在線代碼測試]([https://c.runoob.com/front-end/61](https://c.runoob.com/front-end/61)) ```javascript <!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>Hello React!</title> <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script> <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script> <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script> </head> <body> <div id="app"></div> <script type="text/babel"> ReactDOM.render( <h1>Hello, React!</h1>, document.getElementById('app') ); </script> </body> </html> ``` >[danger]注意: 此時只是測試語法使用, 并不是真實項目開發使用
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