Issue 4864 - Start using ESLint for adblockpluschrome

notification.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 79 matching lines @@
   notificationElement.hidden = false;
   notificationElement.addEventListener("click", event =>
   {
     switch (event.target.id)
     {
       case "notification-close":
         notificationElement.classList.add("closing");
         break;
       case "notification-optout":
         Notification.toggleIgnoreCategory("*", true);
+        // Falls through.
       case "notification-hide":
         notificationElement.hidden = true;
         notification.onClicked();
         break;
     }
   }, true);
 }, false);