JSFiddle - React, Tailwind, and code Playground

HTML

<div class="rollover">
    <img class="rollover" src="http://dummyimage.com/600x400/000/fff" />
    <img class="" src="http://dummyimage.com/600x400/fff/000" />
</div>

CSS

div.rollover img:not(.rollover) {display: none;}
div.rollover:hover img:not(.rollover) {display: inline;}
div.rollover:hover img.rollover {display: none;}