75 lines
2.0 KiB
HTML
75 lines
2.0 KiB
HTML
<!--
|
|
* @Author: chenxuan
|
|
* @Date: 2021-11-21 15:55:15
|
|
* @LastEditTime: 2022-01-11 15:32:37
|
|
* @LastEditors: chenxuan
|
|
-->
|
|
<!DOCTYPE html>
|
|
<html lang="en" dir="ltr">
|
|
<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>生命周期</title>
|
|
<script src="../bower_components/react/react.js"></script>
|
|
<script src="../bower_components/react/react-dom.js"></script>
|
|
<script src="../bower_components/babel/browser.js"></script>
|
|
</head>
|
|
<body>
|
|
<div id="app"></div>
|
|
<script type="text/babel">
|
|
var A1=React.createClass({
|
|
getInitialState:function(){
|
|
alert("初始状态值!");
|
|
return{
|
|
color:'red'
|
|
}
|
|
},
|
|
componentWillMount:function(){
|
|
alert("第一次将要渲染")
|
|
},
|
|
componentDidMount:function(){
|
|
alert("第一次组件渲染完成");
|
|
let this_=this;
|
|
setTimeout(function(){
|
|
this_.setState({
|
|
color:'green'
|
|
})
|
|
},0)
|
|
},
|
|
componentWillUpdate:function(){
|
|
alert("因状态发生变化，重新渲染");
|
|
},
|
|
componentDidUpdate:function(){
|
|
alert("组件状态已发生变化");
|
|
},
|
|
|
|
render:function(){
|
|
return(
|
|
<div style={{color:this.state.color}}>北京欢迎您!</div>
|
|
)
|
|
}
|
|
});
|
|
var B1=React.createClass({
|
|
render:function(){
|
|
return <p>{this.props.a}</p>
|
|
}
|
|
});
|
|
var B2=React.createClass({
|
|
render:function(){
|
|
return <p>{this.props.b}</p>
|
|
}
|
|
});
|
|
var B3=React.createClass({
|
|
render:function(){
|
|
return <p>{this.props.c}</p>
|
|
}
|
|
});
|
|
ReactDOM.render(
|
|
<A1/>
|
|
,document.getElementById('app')
|
|
)
|
|
</script>
|
|
</body>
|
|
</html>
|