JSFiddle - React, Tailwind, and code Playground

HTML

<section>
 <div>Something</div>
 <a href="#">Some Copy</a>
 <div>Something</div>
 
</section>

<section>
 <a href="#">Some Copy</a>
 <div>Something</div>
 <a href="#">Some Copy</a>
 <a href="#">Some Copy</a>
 <div>Something</div>
</section>

CSS

.last{
    color:red;
}

JavaScript

$("section").each(function(){
      var last = $(this).children(':last');
      last.addClass('last');
});