code: function startListeningForEvent(eventName, namespace) {
      document.documentElement.addEventListener(eventNameMapping[eventName] || eventName, handleEvent.bind(null, namespace, "data-" + namespace + "-name", getEventRegistry(namespace)[eventName]));
  }
docs: Add a event lister to the <html> element
  The listener will always call handleEvent with the domEventRegistry for the given event