<h2 id="count"></h2>
#count { font-size: 30px; }
let countBox = document.querySelector('#count');
let count = 0;
let num = 1234567890;
let counting = setInterval(function () {
if (count >= num) {
count = num;
clearInterval(counting);
} else {
count += 12345678;
}
countBox.innerHTML = new Intl.NumberFormat().format(count);
}, 10);
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