JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>Item A</li>
    <li>Item B</li>
    <li>Item C</li>
</ul>
<ul>
    <li style="display:none;">Item A</li>
    <li>Item B</li>
    <li>Item C</li>
</ul>

CSS

ul { border:solid 1px;}

JavaScript

$('li:visible:first').css('background','blue');