JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="foo">foo</div>
<div class="bar">bar</div>
<div class="bar">bar</div>
<div class="bar">bar</div>
<div class="bar">bar</div>
<div class="bar">bar</div>

JavaScript

$(".foo").each(function(){
   var $foo = $(this);
   if (!$foo.next(".foo").length){
       $foo.css("color", "red");
    } 
});