菜鸟教程在线编辑器

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                <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>菜鸟教程 React 实例</title>
<script src="https://lf26-cdn-tos.bytecdntp.com/cdn/expire-1-M/react/18.2.0/umd/react.production.min.js" ></script>
<script src="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/react-dom/18.2.0/umd/react-dom.production.min.js"></script>
<script src="https://lf9-cdn-tos.bytecdntp.com/cdn/expire-1-M/babel-standalone/6.26.0/babel.min.js" ></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
class Content extends React.Component {
  render() {
    return (
      <div>
        <input type="text" value={this.props.myDataProp} onChange={this.props.updateStateProp} />
        <h4>{this.props.myDataProp}</h4>
      </div>
    );
  }
}

class HelloMessage extends React.Component {
  constructor(props) {
    super(props);
    this.state = { value: 'Hello Runoob!' };
    this.handleChange = this.handleChange.bind(this);
  }

  handleChange(event) {
    this.setState({ value: event.target.value });
  }

  render() {
    var value = this.state.value;
    return (
      <div>
        <Content myDataProp={value} updateStateProp={this.handleChange} />
      </div>
    );
  }
}

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(<HelloMessage />);
</script>

</body>
</html>
              