JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test">
    aaaaaaaaaaaaaaaaaaaaaaaaa<br>
    <img src="http://blogshop.ptitestoilesdaraignees.fr/wp-content/uploads/2011/01/coeur-rouge1.gif" class="hide">
 </div>

CSS

.hide{
    opacity: 0;
    filter: "old-ie-staff";
}

JavaScript

$(document).on('mouseover', '.test', function () {
    $(this).find('.hide').stop(true).animate({opacity: 1},300);
}).on('mouseout', function() {
    $(this).find('.hide').stop(true).animate({opacity: 0},300);
})