JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://dl.dropbox.com/u/6594451/for_demos/prefixfree.min.js"></script>
<div class="loader"></div>

CSS

@keyframes loader {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.loader {
    width:40px;
    height: 40px;
    background-image: url("http://sakai-eikaiwa.com/wp-content/plugins/contact-form-7/images/ajax-loader.png");
    background-size: 40px 40px;
    animation: loader 0.7s linear 0s infinite;
}