--- /dev/null
+<?php
+
+namespace Drupal\big_pipe\EventSubscriber;
+
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Drupal\Core\Routing\RoutingEvents;
+use Drupal\Core\Routing\RouteBuildEvent;
+
+/**
+ * Sets the '_no_big_pipe' option on select routes.
+ */
+class NoBigPipeRouteAlterSubscriber implements EventSubscriberInterface {
+
+ /**
+ * Alters select routes to have the '_no_big_pipe' option.
+ *
+ * @param \Drupal\Core\Routing\RouteBuildEvent $event
+ * The event to process.
+ */
+ public function onRoutingRouteAlterSetNoBigPipe(RouteBuildEvent $event) {
+ $no_big_pipe_routes = [
+ // The batch system uses a <meta> refresh to work without JavaScript.
+ 'system.batch_page.html',
+ // When a user would install the BigPipe module using a browser and with
+ // JavaScript disabled, the first response contains the status messages
+ // for installing a module, but then the BigPipe no-JS redirect occurs,
+ // which then causes the user to not see those status messages.
+ // @see https://www.drupal.org/node/2469431#comment-10901944
+ 'system.modules_list',
+ ];
+
+ $route_collection = $event->getRouteCollection();
+ foreach ($no_big_pipe_routes as $excluded_route) {
+ if ($route = $route_collection->get($excluded_route)) {
+ $route->setOption('_no_big_pipe', TRUE);
+ }
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function getSubscribedEvents() {
+ $events[RoutingEvents::ALTER][] = ['onRoutingRouteAlterSetNoBigPipe'];
+ return $events;
+ }
+
+}