react/B/1/P06.html

<!--
 * @Author: chenxuan
 * @Date: 2021-12-26 16:30:03
 * @LastEditTime: 2021-12-30 22:12:26
 * @LastEditors: chenxuan
-->
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>state</title>
</head>
<body>
	<div id="app"></div>
	<script src="../package/old/react.development.js"></script>
    <script src="../package/old/react-dom.development.js"></script>
    <script src="../package/old/babel.min.js"></script>
    <script type="text/babel">
    	class Weather extends React.Component{
			constructor(props){
				super(props)
				this.state={
					ishot:true
				}
			}
			render(){
				const {ishot}=this.state;
				// 解决this指向问题
				return <h1 onClick={this.demo.bind(this)}>今天天气很{ishot ? '炎热' : '凉爽'}</h1>
			}
			demo(){
				this.setState({
					ishot:!this.state.ishot
				})
			}
		}
		ReactDOM.render(
			<Weather/>,document.getElementById('app')
		)
		
    </script>
</body>
</html>