Brick,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/locale/ru.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-duration-format/2.2.2/moment-duration-format.min.js"></script>
</head>
<body>
<div><span id="h">01</span> : <span id="m">15</span> : <span id="s">45</span></div>
<script>
moment.locale('ru');
var DateEnd = moment();
var span = document.querySelectorAll('div span');
[].forEach.call(span, function(el) {
DateEnd.add(+el.textContent, el.id)
});
function fn()
{
var DateTime = moment();
var d = DateEnd - DateTime;
document.querySelector("div").innerHTML = moment.duration(d).format('[<span id="h">]hh[</span> : <span id="m">]mm[</span> : <span id="s">]ss[</span>]');
d > 0 && window.setTimeout(fn, 300)
}
fn()
</script>
</body>
</html>