https://www.houstonlanding.org/srv/htdocs/wp-content/plugins/houst…//js/components/counter.js?ver=2327

1const Counter = (function() {
2
3	const setClass = 'counted'
4	const collection = document.querySelectorAll('.count-this:not(.' + setClass + ')')
5	let isScrollingRef
6
7	const handleScrollCheck = () => {
8		clearTimeout(isScrollingRef)
9
10		isScrollingRef = setTimeout(() => {
11
12			collection.forEach((ele, ind) => {
13				if(elementIsVisibleInViewport(ele) && !ele.classList.contains(setClass)) {
14
15					let start = (ele.dataset.startCount == undefined) ? 0 : ele.dataset.startCount
16					const end = parseInt(ele.innerHTML.replace(/\,/g,''), 10)
17
18					let counting = setInterval(updateCount)
19
20					function updateCount() {
21						ele.classList.add(setClass)
22						const currentCount = start = (start > end-1000) ? start + 1 : start + 1001 
23
24						ele.innerHTML = currentCount.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
25						ele.dataset.startCount = currentCount
26
27						if (start >= end) {
28							clearInterval(counting)
29						}
30					}
31				}
32			})
33
34		}, 30)
35
36	}
37
38	window.addEventListener('scroll', handleScrollCheck)
39
40	return {
41		init: function() {
42			handleScrollCheck()
43		}
44	}
45
46})();
47
48(function() {
49	Counter.init();
50})();