From 02dc68221b65a86fe7f6623e9eb161003e07cfc7 Mon Sep 17 00:00:00 2001
From: ABBOUD Moncef <moncef.abboud95@gmail.com>
Date: Wed, 20 Mar 2024 14:04:29 +0100
Subject: [PATCH] fix: replace resize event with ResizeObserver in xblock
 iframe (#34387)

---
 lms/templates/courseware/courseware-chromeless.html | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lms/templates/courseware/courseware-chromeless.html b/lms/templates/courseware/courseware-chromeless.html
index 1d0d401726..e8411c9e42 100644
--- a/lms/templates/courseware/courseware-chromeless.html
+++ b/lms/templates/courseware/courseware-chromeless.html
@@ -209,7 +209,9 @@ ${HTML(fragment.foot_html())}
       observer.observe(document.body, { attributes: true, childList: true, subtree: true });
 
       window.addEventListener('load', dispatchResizeMessage);
-      window.addEventListener('resize', dispatchResizeMessage);
+
+      const resizeObserver = new ResizeObserver(dispatchResizeMessage);
+      resizeObserver.observe(document.body);
     }
   }());
 </script>