Fix an issue where dragging while the page has no scrollbar results i…

…n a console error (#23666)
WordPress · Jul 8, 2020 · 0124a9f · 0124a9f
1 parent 55279e8
commit 0124a9f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/packages/block-editor/src/components/block-draggable/use-scroll-when-dragging.js b/packages/block-editor/src/components/block-draggable/use-scroll-when-dragging.js
@@ -55,6 +55,9 @@ export default function useScrollWhenDragging() {
 	}, [] );
 
 	const scrollOnDragOver = useCallback( ( event ) => {
+		if ( ! scrollParentY.current ) {
+			return;
+		}
 		const scrollParentHeight = scrollParentY.current.offsetHeight;
 		const offsetDragStartPosition =
 			dragStartY.current - scrollParentY.current.offsetTop;