JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>

JavaScript

window.onerror = function (msg, url, line) {
  alert("There was an error!!")
}
jQuery.ajax({
  url: "./doesntexist",
  dataType:"jsonp",
  error: function() {
    alert("failure invoked");
  }
})