Example code for loading airbrake.js asynchronously

gistfile1.js

(function(s, id, cb) {
  var js, fjs = document.getElementsByTagName(s)[0];
  if (document.getElementById(id)) return;
  js = document.createElement(s);
  js.id = id; js.type = 'text/javascript'; js.async = true;
  js.onload = js.onreadystatechang = cb;
  js.src = (("https:" == document.location.protocol) ? "https://ssljscdn" : "http://jscdn") + ".airbrake.io/notifier.min.js";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'airbrake-js-notifier', function () {
  Airbrake.setKey('<your-api-key>');
  Airbrake.setHost('api.airbrake.io');
  Airbrake.setEnvironment('dev');
  Airbrake.setGuessFunctionName(true);
  Airbrake.setErrorDefaults({
    url: document.URL,
    component: "hello",
    action: "world",
  });
}))

This is asynchronous, but still blocks the onload event handler. The right way to load a script in a non-blocking fashion is described here: http://calendar.perfplanet.com/2012/the-non-blocking-script-loader-pattern/