JSFiddle - React, Tailwind, and code Playground
HTML
<div id="test">
<ul id="list">
<li></li>
<li></li>
</ul>
</div>
<div id="output"></div>
JavaScript
$(document).ready(function () {
var wrapper = $("<div/>");
$("#list").wrap(wrapper);
$("#output").text($("#list").children().length);
});