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How to use timer to implement countdown function in js
- php中世界最好的语言Original
- 2018-04-16 10:03:573191browse
This time I will show you how to use jstimerto realize thecountdown function, js uses timer to realize the countdown functionNotesThere are Which ones, the following are practical cases, let’s take a look.
Date function
Countdown = use future time - present time
Question: The future time is 1970 milliseconds away - the present time is 1970 years 1
Just use the number of milliseconds in the future - the number of milliseconds now and continue to convert.
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
body{
font-size:30px;
text-align: center;
color:red;
}
</style>
<script>
window.onload = function(){
var demo = document.getElementById("demo");
var endTime = new Date("2017/11/12 17:30:00"); // 最终时间
setInterval(clock,1000); // 开启定时器
function clock(){
var nowTime = new Date(); // 一定是要获取最新的时间
// console.log(nowTime.getTime()); 获得自己的毫秒
var second = parseInt((endTime.getTime() - nowTime.getTime()) / 1000);
// 用将来的时间毫秒 - 现在的毫秒 / 1000 得到的 还剩下的秒 可能处不断 取整
// console.log(second);
// 一小时 3600 秒
// second / 3600 一共的小时数 /24 天数
var d = parseInt(second / 3600 / 24); //天数
//console.log(d);
var h = parseInt(second / 3600 % 24) // 小时
// console.log(h);
var m = parseInt(second / 60 );
//console.log(m);
var s = parseInt(second ); // 当前的秒
console.log(s);
/* if(d<10)
{
d = "0" + d;
}*/
d<10 ? d="0"+d : d;
h<10 ? h="0"+h : h;
m<10 ? m="0"+m : m;
s<10 ? s="0"+s : s;
demo.innerHTML = "距离抢购时间还剩: "+d+"天 "+h+"小时 "+m+"分钟 "+s+"秒";
}
}
</script>
</head>
<body>
<p id="demo"></p>
</body>
</html>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
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