JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content_container" style="position:relative;">
    <div class="content">content</div>
    <img class="overlay_image" style="position:absolute;top:0;left:0;display:none;" src="http://2.bp.blogspot.com/_bpMgKpXKabQ/TKMrEZGoOLI/AAAAAAAAARQ/JNp1BmVlEB4/s1600/Monkey-Mia-MJK-Australia.jpg"/>
</div>

JavaScript

$('.content_container').hover(function(){
    $(this).children('.overlay_image').fadeToggle(300);
});