public/misc/script.index.js

@@ -51,6 +51,8 @@ $(document).ready(function(){
                                 }
                             }).done(function() {
                                 NProgress.inc(1 / XHR.length);
+                            }).fail(function() {
+                                // Should check why this failed (timeout or bad request?), and if this is the origin domain, take action
                             }));
                         });
                         $.when.apply($, XHR).then(function(){