From fe7cb345448822528ce0447141810c27f9e56cff Mon Sep 17 00:00:00 2001
From: Claude Paroz <claude@2xlibre.net>
Date: Mon, 18 Apr 2022 15:19:58 +0200
Subject: [PATCH] Refs #33328 -- Corrected JS check for event.detail presence
 in docs.

---
 docs/ref/contrib/admin/javascript.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/ref/contrib/admin/javascript.txt b/docs/ref/contrib/admin/javascript.txt
index ae1e546461..e1188a6f84 100644
--- a/docs/ref/contrib/admin/javascript.txt
+++ b/docs/ref/contrib/admin/javascript.txt
@@ -68,7 +68,7 @@ to the old listener signature as follows:
     }
 
     $(document).on('formset:added', (event, $row, formsetName) => {
-        if (event.detail.formsetName) {
+        if (event.detail && event.detail.formsetName) {
             // Django >= 4.1
             handleFormsetAdded(event.target, event.detail.formsetName)
         } else {