1.getInitialState:设置初始State,返回Object
2.this.setState():改变State
3.都在creatClass内创建类
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,
minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
<script src="lib/react.js"></script>
<script src="lib/react-dom.js"></script>
<script src="lib/browser.min.js"></script>
<title></title>
</head>
<body>
<div id="example"></div>
</body>
<script type="text/babel">
var LikeButton = React.createClass({
getInitialState: function() {
return {liked: false};
},
handleClick: function(event) {
this.setState({liked: !this.state.liked});
},
render: function() {
var text = this.state.liked ? ‘喜欢‘ : ‘不喜欢‘;
return (
<p onClick={this.handleClick}>
你<b>{text}</b>我。点我切换状态。
</p>
);
}
});
ReactDOM.render(
<LikeButton />,
document.getElementById(‘example‘)
);
</script>
</html>
时间： 2024-11-03 05:37:57