用原生js做到固定时间的毫秒数

最新推荐文章于 2025-06-16 17:00:00 发布

原创最新推荐文章于 2025-06-16 17:00:00 发布 · 1.8k 阅读

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#倒计时 #js #毫秒数转换为天数

本文介绍了如何使用JavaScript原生代码将固定的毫秒数转换为天数并实现倒计时效果，提供了具体的实现代码和展示效果。

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function gettime() {
获取当前时间的毫秒数
var sTime= new Date().getTime();
获取截止时间的毫秒数
var etime = "2018-04-26 16:00:00";
var times = Date.parse(new Date(etime.replace(/-/g, "/")));
var cha=times-sTime;
var days = cha / 1000 / 60 / 60 / 24;
var daysRound = Math.floor(days);
var hours = cha/ 1000 / 60 / 60 - (24 * daysRound);
var hoursRound = Math.floor(hours);
var minutes = cha / 1000 /60 - (24 * 60 * daysRound) - (60 * hoursRound);
var minutesRound = Math.floor(minutes);
var secounds = cha / 1000 - (24 * 60 * 60 * daysRound) - (60 * 60 *hoursRound) - (60*minutesRound);
var secoundsRound = Math.floor(secounds);
if(secoundsRound<=9){
secoundsRound="0"+secoundsRound;
}
document.getElementById("day").innerHTML=daysRound;
document.getElementById("hour").innerHTML=hoursRound;
document.getElementById("minutes").innerHTML=minutesRound;
document.getElementById("secounds").innerHTML=secoundsRound;
}
window.onload=function(){
var that=this;
that.gettime();
setInterval(function () {
that.gettime();

},1000)}

效果图