Polymer web component for a bounce in effect.
bower install --save mbykovskyy/bounce-in-animation
<link rel="import" href="bounce-in-animation.html">
<div id="box"></div>
<bounce-in-animation id="bounce-in" duration="500" easing="ease-out"></bounce-in-animation>
<script>
document.addEventListener('polymer-ready', function() {
var animation = document.getElementById('bounce-in');
animation.target = document.getElementById('box');
animation.play();
});
</script>
See component page for details and demo.