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js 实现倒计时功能,兼容ios,类似京东

效果

js 实现倒计时功能,兼容ios,类似京东_js倒计时

html

<div class="weui-cell count_down">
<div class="weui-cell__bd">
<p>秒杀中,抢到就是赚到</p>
</div>
<div class="weui-cell__ft">距结束
<span class="num">00</span>:
<span class="num">00</span>:
<span class="num">00</span>
</div>
</div>

js

function antitime() {
var time="2018-09-04 21:08:49";
var to = new Date(time.replace(/-/g, "/"));
var now = new Date();
var deltaTime = to.getTime() - now.getTime();
//超时就停止倒计时
if (deltaTime <= 0) {
window.clearInterval(timer);
return;
}
var d= deltaTime / (1000 * 60 * 60 * 24);
var h = Math.floor(deltaTime / 1000 / 60 / 60 % 24);
var m = Math.floor(deltaTime / 1000 / 60 % 60);
var s = Math.floor(deltaTime / 1000 % 60);
//把时间的数字转成字符串, 如果时分秒不足10, 则前面补0
var timeStr = ""+ (h/10>=1?h=h:h="0"+h) + (m/10>=1?m=m:m="0"+m) + (s/10>=1?s=s:s="0"+s);
//console.log(timeStr);
//each循环遍历.num元素
$(".weui-cell__ft .num").each(function(index, span) {
$(span).html(timeStr.substring(index, index+2));
if(index==1) $(span).html(timeStr.substring(2, 4));
if(index==2) $(span).html(timeStr.substring(4, 6));
//$(span).html();这个方法是用来设置span里面的值的
});
}

//每秒执行一次
var timer = setInterval(antitime, 1000);

​.replace(/-/g, "/")​​ 是进行转换,目的就是兼容ios


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