Below is the code to create a timer till a specific datetime.
For this sample, the deadline is 5/16/2021 11:26:00
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language="javascript">
function getTimeRemaining(endtime) {
var d = new Date();
var t = endtime.getTime() - d.getTime();
var seconds = Math.floor((t / 1000) % 60);
var minutes = Math.floor((t / 1000 / 60) % 60);
var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
var days = Math.floor(t / (1000 * 60 * 60 * 24));
return {
'total': t,
'days': days,
'hours': hours,
'minutes': minutes,
'seconds': seconds
};
}
function initializeCountdown(id, endtime) {
var clock = document.getElementById(id);
var daysSpan = clock.querySelector('.days');
var hoursSpan = clock.querySelector('.hours');
var minutesSpan = clock.querySelector('.minutes');
var secondsSpan = clock.querySelector('.seconds');
function updateTimer() {
var t = getTimeRemaining(endtime);
daysSpan.innerHTML = t.days;
hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);
if (t.total <= 0) {
clearInterval(timeinterval);
}
}
updateTimer();
var timeinterval = setInterval(updateTimer, 1000);
}
window.onload = function () {
var deadline = new Date("5/16/2021 11:26:00"); // The datetime of the
deadline
initializeCountdown('clockdiv', deadline);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div id="clockdiv">
<div style="float:left;">
<span class="days"></span>
<div>Days</div>
</div>
<div style="float:left;">
<span class="hours"></span>
<div>Hours</div>
</div>
<div style="float:left;">
<span class="minutes"></span>
<div>Minutes</div>
</div>
<div style="float:left;">
<span class="seconds"></span>
<div>Seconds</div>
</div>
</div>
</form>
</body>
</html>
Output –
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