//闪购活动
var clocks = document.getElementById("clock");
// alert(clocks);
function leftTimer(){
var now = new Date();
//创建一个新日期
var endDate=new Date('2020/6/20 22:58');
//创建一个指定日期
var leftTime = (endDate.getTime()-now.getTime())/1000;
// alert(leftTime);
//使两个日期都转换为毫秒 再让指定日期减去当前日期
//计算出来的毫秒数除以1000 计算剩余秒数
// var days = parseInt(leftTime/60/60/24);
var hours = parseInt(leftTime/60/60);
var minutes = parseInt(leftTime/60%60);
var seconds = parseInt(leftTime%60);
// alert(seconds);
//补零
if(hours < 10){
hours = '0' + hours;
}
if(minutes < 10){
minutes = '0' + minutes;
}
if(seconds < 10){
seconds = '0' + seconds;
}
//拼接
time = hours + "小时" + minutes + "分钟" + seconds + "秒";
if(leftTime <= 0 ){
clocks.innerHTML = "活动已经结束";
}else{
clocks.innerHTML = time;
}
}
leftTimer();
//由于第一秒时候为空,所以先执行再下一步
setInterval(leftTimer,1000);
//每隔一秒执行一次
}
效果图