JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
<li class="list">alex Thomas</li>
<li class="list">alex Thomas</li>
<li class="list">alex Thomas</li>
<li class="">alex Thomas</li>
</ul>

CSS

li.list:last-of-type{color:red}

JavaScript

$(function(){
   
    $('li.list').last().css('color','red');
    
});