From 122f9313e58c8bca1bf49b069ba91e75b25d0cae Mon Sep 17 00:00:00 2001
From: Jan-Hendrik Willms <tleilax+studip@gmail.com>
Date: Wed, 25 Jun 2025 22:15:42 +0200
Subject: test if event.target is an element before calling closest(), fixes
 #5393

Closes #5393

Merge request studip/studip!4274
---
 resources/assets/javascripts/studip-ui.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/resources/assets/javascripts/studip-ui.js b/resources/assets/javascripts/studip-ui.js
index f563b31..ab2de3c 100644
--- a/resources/assets/javascripts/studip-ui.js
+++ b/resources/assets/javascripts/studip-ui.js
@@ -12,7 +12,10 @@ import RestrictedDatesHelper from './lib/RestrictedDatesHelper';
     $.widget( "ui.dialog", $.ui.dialog, {
         _allowInteraction: function( event ) {
             return hasParentWhich(isCKBodyWrapper)(event.target)
-                || event.target.closest('.studip-dialog') !== null
+                || (
+                    event.target instanceof Element
+                    && event.target.closest('.studip-dialog') !== null
+                )
                 || this._super( event );
         },
     });
-- 
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