JSFiddle - React, Tailwind, and code Playground

HTML

<div class="divimg hidden">
    <img src="" realsrc="https://www.google.pl/images/srpr/logo4w.png" alt="Obrazek" />
</div>

JavaScript

$('.divimg.hidden').on('mouseenter', function() {
        
        var t = $(this).find('img');
        t.attr('src', t.attr('realsrc')); 
        t.removeAttr('realsrc'); 
        t.removeClass('hidden');
        
    });