JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>An item</li>
</ul>
<button id="foo">Click me</button>
<button id="bar">Me too</button>

JavaScript

$(function() {
    var selector = "ul li.foo";
    $(document).on('DOMNodeInserted', function(e) {
        if ($(e.srcElement || e.target).is(selector)) {
            alert("Matching element inserted!");
        }
    });
    
    $("button").on('click', function() {
        $("ul").append("<li class=" + this.id + ">A dynamically added item</li>");
    });
});