JSFiddle - React, Tailwind, and code Playground

HTML

<a>Fruits</a>
<ul id="fruits">
    <li>Apple</li>
    <li>Banana</li>
    <li>Coconut</li>
    <li>Durian</li>
</ul>

CSS

li {
    height: 20.2px;
}

JavaScript

var mylist = document.getElementById("fruits");

alert(window.getComputedStyle(mylist, null).getPropertyValue("height"));
alert($("#fruits").height());