Removes a previously-bound callback function for an event.
When called with no parameters, callbacks for all events are removed.
questionEditorApp.off("preview:changed"); //Removes callbacks for the 'preview:changed' event. questionEditorApp.off(); //Removes callbacks for all events.
Name of the event that you want to stop listening to.
If no callback is provided, all callbacks for the event_name will be removed.
If no context is provided, all callbacks for the event_name, event_callback combination will be removed.