1 files changed, 3 insertions, 3 deletions
diff --git a/src/client/views/nodes/DocumentView.tsx b/src/client/views/nodes/DocumentView.tsx
index 823ec885b..336f65b85 100644
--- a/src/client/views/nodes/DocumentView.tsx
+++ b/src/client/views/nodes/DocumentView.tsx
@@ -1338,13 +1338,13 @@ export class DocumentView extends ObservableReactComponent<DocumentViewProps> {
     }
     @observable public static LongPress = false;
     @observable public static ExploreMode = false;
-    @observable public static LastPressedSidebarBtn: Opt<Doc>; // bcz: this is a hack to handle highlighting buttons in the leftpanel menu .. need to find a cleaner approach
+    @observable public static LastPressedSidebarBtn: Opt<Doc> = undefined; // bcz: this is a hack to handle highlighting buttons in the leftpanel menu .. need to find a cleaner approach
     @computed public static get exploreMode() {
         return () => (DocumentView.ExploreMode ? ScriptField.MakeScript('CollectionBrowseClick(documentView, clientX, clientY)', { documentView: 'any', clientX: 'number', clientY: 'number' })! : undefined);
     }
     @observable public docView: DocumentViewInternal | undefined | null = undefined;
-    @observable public textHtmlOverlay: Opt<string>;
-    @observable public textHtmlOverlayTime: Opt<number>;
+    @observable public textHtmlOverlay: Opt<string> = undefined;
+    @observable public textHtmlOverlayTime: Opt<number> = undefined;
     @observable private _isHovering = false;
 
     public htmlOverlayEffect: Opt<Doc>;