<div id="counter">0</div>

function runCounter(limit = 100, current = 0, element="counter") {
    var counterElement = document.getElementById(element)
    var interval = setInterval(function() {
        if (current < limit) {
            current++
            counterElement.textContent = current
        } else {
            clearInterval(interval)
        }
    }, 100)
}
runCounter(66,0,"counter")