JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://raw.github.com/SteveSanderson/knockout/master/build/output/knockout-latest.debug.js"></script>
<div data-bind="style: { background-image: url('http://compatinta.com/4841-large/10-cartulinas-fluorescentes-50x65-cm-sadipal-250-g-rojo.jpg') }"></div>

CSS

div {
    width: 275px;
    height: 95px;
}

JavaScript

ko.applyBindings({});