<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script src="./js/react.js"></script> <script src="./js/react-dom.js"></script> <script src="./js/browser.min.js"></script> </head> <body> <div id="demo"></div> <script type="text/babel"> //定义一个组建，名字第一个必须是大写 var Fir = React.createClass({ render:function(){ return( <h1>Hello 夺命雷公狗</h1> ); } }); ReactDOM.render(<Fir />, /*这里其实也可以使用双标签的如：<Fir></Fir> */ document.getElementById('demo'), function(){ alert('页面渲染完成'); }); </script> </body> </html>