JSFiddle - React, Tailwind, and code Playground

HTML

<button type="button" id="btnTest">Test</button>
<div id="Console"></div>

JavaScript

var _elementToFind = "mydiv3";
var _elementFound = false;
var _counter = 1;
$(document).bind("DOMSubtreeModified", function(evt) {
    if (_elementFound)
        return;
    if ($("#" + _elementToFind).length > 0) {
        alert("element '" + _elementToFind + "' created");
        _elementFound = true;
    }
});

$("#btnTest").click(function() {
    $("body").append($("<div></div>").attr("id", "mydiv" + _counter).html("div #" + _counter));
    _counter++;
});