<!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="example"></div> <script type="text/babel"> class Clock extends React.Component { constructor(props) { super(props); this.state = {date: new Date(),name : 'zzw'}; } render() { return ( <div> <h1>Hello, world!</h1> <h2>现在是 {this.state.date.toLocaleTimeString()}.</h2> <h3>writer is {this.state.name}.</h3> </div> ); } } ReactDOM.render( <Clock />, document.getElementById('example') ); </script> </body> </html>