<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>毫秒定時器</title>
</head>
<body>
<div class="time-item" style="text-align: center;margin-top: 10%; font-size: 30px;">
<span id="day_show">0天</span>
<strong id="hour_show">0時</strong>
<strong id="minute_show">0分</strong>
<strong id="second_show">0秒</strong>
<strong id="ms_show" style="color: red;">0毫秒</strong>
</div>
</body>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript">
function timer() {
var iCount = setInterval(function() {
var myDate = new Date();
var beginDate = (new Date("2019/07/06 12:00:00")).getTime(); //得到毫秒
var nowDate = myDate.getTime()
// var between = nowDate-beginDate // 順時增加
var between = beginDate-nowDate // 倒計時
var s = parseInt(between/1000)
if (s > 0) {
var day = Math.floor(s/3600/24)
var hours = Math.floor(s/3600) - (day*24)
var min = Math.floor(s/60) - (day*24*60) - (hours*60)
var second = Math.floor(s) - (day*24*3600) - (hours*3600) - (min*60)
var ms = Math.floor(between) - (day*24*3600*1000) - (hours*3600*1000) - (min*60*1000) - (second*1000)
$('#day_show').html(day + "天");
$('#hour_show').html('<s id="h"></s>' + hours + '時');
$('#minute_show').html('<s></s>' + min + '分');
$('#second_show').html('<s></s>' + second + '秒');
$('#ms_show').html('<s></s>' + ms + '毫秒');
}else{
$('#day_show').html(0 + "天");
$('#hour_show').html('<s id="h"></s>' + 0 + '時');
$('#minute_show').html('<s></s>' + 0 + '分');
$('#second_show').html('<s></s>' + 0 + '秒');
$('#ms_show').html('<s></s>' + 0 + '毫秒');
// setTimeout("stop()", 10);
clearInterval(iCount) // 清除定時器 附帶句柄條件
}
}, 10)
}
$(function() {
timer()
})
</script>
</html>
