Wealthfront Blog Embed jQuery Deconstructed Example

jQueryAnimateDeconstructed.js

var element = document.getElementsByClassName('selector')[0];
var current = element.style.top;
var goal = 100;
var duration = 2;
var step = (goal - current) / (duration * 60);

var tick = function() {
    current += step;
    element.style.top = current + 'px';

    if (current < goal) {
        setTimeout(tick, 1000/60);
    }
}

tick();