<!DOCTYPE html>
<html>
<head>
<meat charset="UTF-8">
<title>state的简写方式</title>
</head>
<body>
<!-- 准备好一个容器 -->
<div id="test"></div>
<!-- 核心库 -->
<script type="text/javascript" src="../js/react.development.js"></script>
<!-- react-dom,操作dom -->
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<!-- 引入babel，jsx转为js -->
<script type="text/javascript" src="../js/babel.min.js"></script>
<!-- 此处一定要写babel -->
<script type="text/babel">
//1.创建组件
class Weather extends React.Component{
//初始化状态
state = { isHot: false, wind: '微风' }
render(){
const {isHot,wind} =this.state;
return <h1 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'},{wind}</h1>
}
//自定义方法————要用赋值语句的方式+箭头函数
changeWeather = ()=> {
const isHot=this.state.isHot
this.setState({isHot:!isHot})
}
}
//2.渲染组件到页面
ReactDOM.render(<Weather />, document.getElementById('test'));
</script>
</body>
</html>
