fixed key value for empty lists to show [], fixed tree view to allow 'data' field .to display for empty lists. Gave untitled Tabs a default height

1 files changed, 3 insertions, 0 deletions

diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index c4a49962b..c78b01def 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -91,6 +91,9 @@ export async function DocCastAsync(field: FieldResult): Promise<Opt<Doc>> {
 export function DocListCast(field: FieldResult): Doc[] {
     return Cast(field, listSpec(Doc), []).filter(d => d instanceof Doc) as Doc[];
 }
+export function DocListCastOrNull(field: FieldResult) {
+    return Cast(field, listSpec(Doc), null)?.filter(d => d instanceof Doc) as Doc[] | undefined;
+}
 
 export const WidthSym = Symbol("Width");
 export const HeightSym = Symbol("Height");