JSFiddle - React, Tailwind, and code Playground

HTML

<div id="veads" style="background:#CCC;height:250px;width:300px;">
    veads
</div>

JavaScript

$(function() {
    var pixel = 'http://lorempicsum.com/futurama/20/20/2';
    $('#veads').on('mouseenter', function() {
        setTimeout(function() {
            $('body').append('<img width="1" height="1" src="' + pixel + '">');
            alert("Pixel added");
        }, 1000);
    });
});