added toList() for Doc|Doc[]

1 files changed, 5 insertions, 2 deletions

diff --git a/src/client/views/nodes/trails/PresBox.tsx b/src/client/views/nodes/trails/PresBox.tsx
index 0a4efbfe4..ed9635bdd 100644
--- a/src/client/views/nodes/trails/PresBox.tsx
+++ b/src/client/views/nodes/trails/PresBox.tsx
@@ -14,7 +14,7 @@ import { List } from '../../../../fields/List';
 import { ObjectField } from '../../../../fields/ObjectField';
 import { listSpec } from '../../../../fields/Schema';
 import { ComputedField, ScriptField } from '../../../../fields/ScriptField';
-import { BoolCast, Cast, DocCast, NumCast, StrCast } from '../../../../fields/Types';
+import { BoolCast, Cast, DocCast, NumCast, StrCast, toList } from '../../../../fields/Types';
 import { emptyFunction, emptyPath, stringHash } from '../../../../Utils';
 import { DocServer } from '../../../DocServer';
 import { Docs } from '../../../documents/Documents';
@@ -1086,7 +1086,10 @@ export class PresBox extends ViewBoxBaseComponent<FieldViewProps>() {
     };
 
     childLayoutTemplate = () => Docs.Create.PresElementBoxDocument();
-    removeDocument = (doc: Doc | Doc[]) => !(doc instanceof Doc ? [doc] : doc).map(d => Doc.RemoveDocFromList(this.Document, this.fieldKey, d)).some(p => !p);
+    removeDocument = (doc: Doc | Doc[]) =>
+        !toList(doc)
+            .map(d => Doc.RemoveDocFromList(this.Document, this.fieldKey, d))
+            .some(p => !p);
     getTransform = () => this.ScreenToLocalBoxXf().translate(-5, -65); // listBox padding-left and pres-box-cont minHeight
     panelHeight = () => this._props.PanelHeight() - 40;
     /**