fix drag-drop undefined error

Good explanation of what's going on at angular#15948 (comment). Fixes angular#15948
jeanbza · Feb 6, 2020 · 04f26b4 · 04f26b4
1 parent 173f5fa
commit 04f26b4
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/cdk/drag-drop/drag-ref.ts b/src/cdk/drag-drop/drag-ref.ts
@@ -443,6 +443,9 @@ export class DragRef<T = any> {
   /** Sets the container that the item is part of. */
   _withDropContainer(container: DropListRef) {
     this._dropContainer = container;
+    if (!this._initialContainer) {
+      this._initialContainer = container;
+    }
   }
 
   /**