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countdown.html
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<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<title>倒计时</title>
</head>
<body>
<script src="./react-0.13.2/react.js"></script>
<script src="./react-0.13.2/JSXTransformer.js"></script>
<script type="text/jsx">
var style={width:'300px',margin:'0px auto','margin-top':'100px',color:'red'};
var Countdown = React.createClass({
timerTick: function(t) {
var dateTimeStr = this.state.endTime.replace(/-/g,'/');
var date = new Date(dateTimeStr);
var endTimestamp = date.getTime().toString().substr(0, 10);
var nowTimestamp=new Date().getTime().toString().substr(0, 10);
if(endTimestamp<=nowTimestamp){
var t='0秒';
}else{
var days=parseInt((endTimestamp-nowTimestamp)/86400);
var hours=parseInt((endTimestamp-nowTimestamp-days*86400)/3600);
var minutes=parseInt((endTimestamp-nowTimestamp-days*86400-hours*3600)/60);
var seconds=endTimestamp-nowTimestamp-days*86400-hours*3600-minutes*60;
var t=days+'天'+hours+'小时'+minutes+'分'+seconds+'秒';
}
this.setState({
leftTime: t
});
},
getInitialState: function() {
return {
endTime:'2015-10-18 00:00:00',
leftTime: ''
}
},
componentWillMount: function() {
this.timerTick();
},
componentDidMount: function() {
this._interval = setInterval(this.timerTick, 1000);
},
componentWillUnmount: function() {
clearInterval(this._interval);
},
render: function() {
return (
<div style={style}>{this.props.name}：{this.state.leftTime}</div>
);
}
});
React.render(<Countdown name="距离结束时间还有"></Countdown>, document.body);
</script>
</body>
</html>