Before/after image slider
npm install --save slideover
var SlideOver = require('slideover');
<div id="randomelement"> </div>
var s = new SlideOver(document.getElementById('randomelement'));
s.init({
imageTwo: 'https://c2.staticflickr.com/4/3944/15526602308_b4751579ff_c.jpg',
imageOne: 'https://c1.staticflickr.com/1/447/18776343002_357f8952ba_c.jpg'
});