From 26519fe83cac96fe2578ca1c744075944092d21e Mon Sep 17 00:00:00 2001
From: Geireann Lindfield Roberts <60007097+geireann@users.noreply.github.com>
Date: Tue, 22 Sep 2020 00:23:37 +0800
Subject: Update util.ts

---
 src/fields/util.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/fields/util.ts b/src/fields/util.ts
index 9e5890aa8..2ff966e7e 100644
--- a/src/fields/util.ts
+++ b/src/fields/util.ts
@@ -362,7 +362,7 @@ export function updateFunction(target: any, prop: any, value: any, receiver: any
             const oldValue = current;
             const newValue = ObjectField.MakeCopy(value);
             current = newValue;
-            if (!(value instanceof CursorField) && !(value?.some((v: any) => v instanceof CursorField))) {
+            if (!(value instanceof CursorField) && !(value?.some?.((v: any) => v instanceof CursorField))) {
                 UndoManager.AddEvent({
                     redo() { receiver[prop] = newValue; },
                     undo() { receiver[prop] = oldValue; }
-- 
cgit v1.2.3-70-g09d2