From f24f6e5d0d9d047276dc0d488ef4843fe095024f Mon Sep 17 00:00:00 2001
From: Kevin Ansfield <kevin@lookingsideways.co.uk>
Date: Tue, 9 Mar 2021 17:56:27 +0000
Subject: [PATCH] Fixed editor drag/drop getting stuck

no issue

- sometimes it was possible for a drop target element to not have a child which would cause an error and cause drag/drop to get stuck with the dragged element sticking to the cursor with no action occurring on mouseup, requiring an `Esc` press but all further drags also being broken
- added a guard so we can handle `element.firstChild` not existing
---
 .../lib/koenig-editor/addon/components/koenig-editor.js     | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ghost/admin/lib/koenig-editor/addon/components/koenig-editor.js b/ghost/admin/lib/koenig-editor/addon/components/koenig-editor.js
index c8519cc772..35c14d8694 100644
--- a/ghost/admin/lib/koenig-editor/addon/components/koenig-editor.js
+++ b/ghost/admin/lib/koenig-editor/addon/components/koenig-editor.js
@@ -1234,9 +1234,11 @@ export default Component.extend({
             return;
         }
 
-        let cardId = cardElement.firstChild.id;
+        let cardId = cardElement.firstChild?.id;
 
-        return this.componentCards.findBy('destinationElementId', cardId);
+        if (cardId) {
+            return this.componentCards.findBy('destinationElementId', cardId);
+        }
     },
 
     getSectionFromCard(card) {