From cb6804c1e12f7b5811403553b4b49ee08fde9ed2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 6 Oct 2026 13:12:24 +0200
Subject: [PATCH] Test if parent is not null before testing classList

Closes #15152
(grafted from 45cf3086a1f63732e3298845a1fa183375ec76b4)

--HG--
branch : 8.2
---
 sao/src/common.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sao/src/common.js b/sao/src/common.js
index 10b31715f4..bc92baece4 100644
--- a/sao/src/common.js
+++ b/sao/src/common.js
@@ -96,7 +96,7 @@
                 }
                 parent = parent.parentElement;
             }
-            if (!parent.classList.contains('modal')) {
+            if (parent && !parent.classList.contains('modal')) {
                 ancestors.push(window);
             }
             return ancestors;