From 68ad3e8e9d9477ffbef03c0af7c43d68e61cfbdd Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Wed, 16 Jan 2019 20:11:17 +0100
Subject: [PATCH] Tweak the `DOMTokenList.toggle` polyfill (issue 10460)

---
 src/shared/compatibility.js | 7 +++++--
 web/pdf_find_bar.js         | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/shared/compatibility.js b/src/shared/compatibility.js
index 01a2ba701..53b61cadb 100644
--- a/src/shared/compatibility.js
+++ b/src/shared/compatibility.js
@@ -101,14 +101,17 @@ const hasDOM = typeof window === 'object' && typeof document === 'object';
   if (div.classList.toggle('test', 0) === false) {
     return;
   }
-  const originalDOMTokenListToggle = DOMTokenList.prototype.toggle;
 
   DOMTokenList.prototype.toggle = function(token) {
     if (arguments.length > 1) {
       const force = !!arguments[1];
       return (this[force ? 'add' : 'remove'](token), force);
     }
-    return originalDOMTokenListToggle(token);
+
+    if (this.contains(token)) {
+      return (this.remove(token), false);
+    }
+    return (this.add(token), true);
   };
 })();
 
diff --git a/web/pdf_find_bar.js b/web/pdf_find_bar.js
index 665352797..d86993307 100644
--- a/web/pdf_find_bar.js
+++ b/web/pdf_find_bar.js
@@ -180,7 +180,7 @@ class PDFFindBar {
     }
     Promise.resolve(matchesCountMsg).then((msg) => {
       this.findResultsCount.textContent = msg;
-      this.findResultsCount.classList[!total ? 'add' : 'remove']('hidden');
+      this.findResultsCount.classList.toggle('hidden', !total);
       // Since `updateResultsCount` may be called from `PDFFindController`,
       // ensure that the width of the findbar is always updated correctly.
       this._adjustWidth();