JSFiddle - React, Tailwind, and code Playground

HTML

<button class="button"></button>

CSS

.button {
    background-color: transparent;
    border: none;
    color: transparent;
    background-image: url("http://i.stack.imgur.com/dfGe4.png");
    height:35px;
    width:90px;
}

.button:hover {
    background-image: url("http://i.stack.imgur.com/D5lJg.png");
}