From f078929b259e6396148f3f4d1d2e62655cc388e6 Mon Sep 17 00:00:00 2001
From: Domagoj Kriskovic <dom.kriskovic@overleaf.com>
Date: Mon, 16 Mar 2026 12:21:28 +0100
Subject: [PATCH] Fix optional chaining for file extension retrieval in
 EditorSwitch

GitOrigin-RevId: 9aeee2f856c4f4dadc38affecc06179b61267af0
---
 .../js/features/source-editor/components/editor-switch.tsx      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/services/web/frontend/js/features/source-editor/components/editor-switch.tsx b/services/web/frontend/js/features/source-editor/components/editor-switch.tsx
index c83eeef357..092e4563a9 100644
--- a/services/web/frontend/js/features/source-editor/components/editor-switch.tsx
+++ b/services/web/frontend/js/features/source-editor/components/editor-switch.tsx
@@ -17,7 +17,7 @@ function EditorSwitch() {
   const richTextAvailable = openDocName
     ? isVisualEditorAvailable(openDocName)
     : false
-  const extension = getFileExtension(openDocName || '')
+  const extension = getFileExtension(openDocName || '') ?? ''
 
   const handleChange = useCallback(
     (event: ChangeEvent<HTMLInputElement>) => {