时间自动走.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="./js/react.js"></script>
  <script src="./js/react-dom.js"></script>
  <script src="./js/browser.js"></script>
  <script type="text/babel">
    class AutoTime extends React.Component{
      constructor(props) {
        super();
        this.state = {
          hour: '0',
          minutes: '0',
          seconds: '0'
        };
        setInterval(function() {
          this.showTime();
        }.bind(this),1000);
      }
      componentDidMount() {
        this.showTime();
      }
      showTime() {
        var myDate = new Date();
        this.setState({
          hour: myDate.getHours() < 10 ? "0" + myDate.getHours() : myDate.getHours(),
          minutes: myDate.getMinutes() < 10 ? "0" + myDate.getMinutes() : myDate.getMinutes(),
          seconds: myDate.getSeconds() < 10 ? "0" + myDate.getHours() : myDate.getSeconds(),
        })
      }
      render() {
        return <div>
          <span>{this.state.hour}</span>:
          <span>{this.state.minutes}</span>:
          <span>{this.state.seconds}</span>
        </div>
      }
    }
    ReactDOM.render(
      <AutoTime />,
      document.getElementById("div1")
    )
  </script>
</head>
<body>
  <div id="div1"></div>
</body>
</html>