JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
		<li>First</li>
		<li>Second
			<ul>
				<li>Second Sub 1</li>
				<li>Second Sub 2</li>
			</ul>
		</li>
		<li>Third</li>
		<li>Third
			<ul>
				<li>Third Sub 1</li>
				<li>Third Sub 2</li>
			</ul>
		</li>
	</ul>

JavaScript

$(function () {
		var vULSize = $("ul li").size();
		console.log(vULSize);
	});