Issue 5899 - Use CSS attribute selectors for collapsing media elements

include.preload.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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 127 matching lines @@
 
   if (!element.getAttribute("src"))
     return false;
 
   for (let child of element.children)
   {
     // If the <video> or <audio> element contains any <source> or <track>
     // children, we cannot address it in CSS by the source URL; in that case we
     // don't "collapse" it using a CSS selector but rather hide it directly by
     // setting the style="..." attribute.
-    if (["source", "track"].includes(child.localName))
+    if (child.localName == "source" || child.localName == "track")
       return false;
   }
 
   return true;
 }
 
 function collapseMediaElement(element, srcValue)
 {
   if (!srcValue)
     return;
@@ skipping 439 matching lines @@
     let element = event.target;
     if (/^i?frame$/.test(element.localName))
       checkCollapse(element);
   }, true);
 }
 
 window.checkCollapse = checkCollapse;
 window.elemhide = elemhide;
 window.typeMap = typeMap;
 window.getURLsFromElement = getURLsFromElement;