JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<a>A</a>
<a>B</a>
<a>C</a>
<a>D</a>

JavaScript

$("a").each(function(i){
  if( $("a").last().index() == i)
    alert("finish with: "+$(this).html());
})