Mainly used knowledge points for countdown: 1. The setInterval that sets the time interval can be canceled by clearInterval
This is the rendering
The following is the function in js
var shijian=3600; var time=null; function start(){ time=setInterval("count()",1000);//返回值time只是为了需要暂停的时候clearInterval(time)清除时间间隔 } function count(){ if(shijian<0){ alert("time out"); pause();//一般情况下这个if条件是用来提交数据用的,这里只是测试一下。 }else{ $("#time p").html(Math.floor(shijian/60)+":"+shijian%60);//这里用到将毫秒转换到时分格式 shijian--; console.info(time); } } function pause(){ clearInterval(time); } function goOn(){ time = setInterval("count()",1000);//重新设置时间间隔 }
The second one is the html resource , for the convenience, I wrote the css directly in the html
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