JSFiddle - React, Tailwind, and code Playground

HTML

<div id="back"></div>

CSS

div#back {
    background: url('http://dummy-images.com/abstract/dummy-250x250-Rope.jpg');
    width: 250px; height: 250px;
       -ms-transition: all 1.5s ease 0;
      -moz-transition: all 1.5s ease-in-out;
      -webkit-transition: all 1.5s ease 0;
      -o-transition: all 1.5s ease 0;
    transition: all 1.5s ease 0;
}
div#back:hover { background:url('http://dummy-images.com/abstract/dummy-250x250-Floral.jpg'); }