JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<a href="http://site.com/any/different/folders/picture_name.jpg">Go and win</a>
<a href="http://site.com/not/similar/links/some_other_name.png">Go and win</a>

JavaScript

$("a").each(function() {
  var new_href = this.href.substring(this.href.lastIndexOf('/') + 1);
  alert(new_href);
});