JSFiddle - React, Tailwind, and code Playground

by Snake_

HTML

<div class="obrazek">
     <a href="#"><img src="http://www.leagueoflegends.pl/forum/uploads/profile/photo-48227.jpg"><span><img src="http://piq.codeus.net/static/media/userpics/piq_132922_400x400.png" alt="image" /></span></a>
</div

CSS

.obrazek a { position:relative; }
.obrazek a span { position:absolute; display:none; z-index:99; }
.obrazek a:hover span { display:inline; }
.obrazek a:hover span img { max-height: 100px; }