fix(expandParent): check for dimensions closes #2280

example/src/Subflow/index.tsx

@@ -91,6 +91,7 @@ const initialNodes: Node[] = [
     position: { x: 225, y: 50 },
     className: 'light',
     parentNode: '5',
+    expandParent: true,
   },
   { id: '2', data: { label: 'Node 2' }, position: { x: 100, y: 100 }, className: 'light' },
   { id: '3', data: { label: 'Node 3' }, position: { x: 400, y: 100 }, className: 'light' },

src/utils/changes.ts

@@ -10,17 +10,14 @@ function handleParentExpand(res: any[], updateItem: any) {
     if (extendWidth > 0 || extendHeight > 0 || updateItem.position.x < 0 || updateItem.position.y < 0) {
       parent.style = { ...parent.style } || {};
 
+      parent.style.width = parent.style.width ?? parent.width;
+      parent.style.height = parent.style.height ?? parent.height;
+
       if (extendWidth > 0) {
-        if (!parent.style.width) {
-          parent.style.width = parent.width;
-        }
         parent.style.width += extendWidth;
       }
 
       if (extendHeight > 0) {
-        if (!parent.style.height) {
-          parent.style.height = parent.height;
-        }
         parent.style.height += extendHeight;
       }