JSFiddle - React, Tailwind, and code Playground

HTML

<select id="a">
    <option>1</option>
    <option>2</option>
    <option>3</option>
</select>
<button id="add">Add to Select</button>

CSS

div {
    background-color: black;
}

span {
    background-color: red;
}

JavaScript

$("#a").bind("DOMSubtreeModified", function() {
    alert("tree changed");
});


$("#add").click(function() {
    $("#a").append("<option>hey there</option>");
});