JSFiddle - React, Tailwind, and code Playground

HTML

<p>blah</p>
<p>blah</p>
<p>blah</p>
<p>blah</p>
<p>blah</p>
<p>blah</p>

JavaScript

group = $("p")
$.each(group, function(idx, val,f) { 
  alert(idx + ': ' + val); 
  if(idx == group.length - 1)
      alert("done");
});