From 7f9e2f64e8e54471c3566012ea1a83978ee0eb9f Mon Sep 17 00:00:00 2001
From: varjolintu <sami.vanttinen@protonmail.com>
Date: Sat, 30 Jun 2018 08:14:12 +0300
Subject: [PATCH] Add check for newValue

---
 keepassxc-browser/keepassxc-browser.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/keepassxc-browser/keepassxc-browser.js b/keepassxc-browser/keepassxc-browser.js
index f2354f4..d91fbea 100755
--- a/keepassxc-browser/keepassxc-browser.js
+++ b/keepassxc-browser/keepassxc-browser.js
@@ -1293,7 +1293,7 @@ let observer = new MutationObserver(function(mutations, observer) {
         // Handle attributes only if CSS display is modified
         if (mut.type === 'attributes') {
             const newValue = mut.target.getAttribute(mut.attributeName);
-            if (newValue.includes('display') || newValue.includes('z-index')) {
+            if (newValue && (newValue.includes('display') || newValue.includes('z-index'))) {
                 if (mut.target.style.display !== 'none') {
                     cipObserverHelper.handleObserverAdd(mut.target);
                 } else {