JSFiddle - React, Tailwind, and code Playground

by NicoO

HTML

<span class="go-button"> </span>

CSS

.go-button
{
    display: block;
    height: 28px;
    width: 28px;
    background-image: url(http://s28.postimg.org/y3fltsycp/gogreen.gif?noCache=1393616358);
    background-position: 0% 0%;
    position: relative;
}

.go-button:after
{
    position: absolute;
    width: inherit;
    height: inherit;
    top: 0;
    left: 0;
    content:"";
    transition-duration: 0.4s;
    visibility: hidden;
    opacity: 0;
    background-image: url(http://s3.postimg.org/giiu6sz73/gored.gif?noCache=1393616370);
}

.go-button:hover:after
{
    visibility: visible;
    opacity: 1;
}