From 567281fa9b752700b705641e021df42cf2a6eb28 Mon Sep 17 00:00:00 2001
From: kangwei <bingbing.yb@alibaba-inc.com>
Date: Tue, 21 Apr 2020 21:26:36 +0800
Subject: [PATCH] add return

---
 packages/vision-polyfill/src/drag-engine.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/vision-polyfill/src/drag-engine.ts b/packages/vision-polyfill/src/drag-engine.ts
index 94c57b0fa..97849cd57 100644
--- a/packages/vision-polyfill/src/drag-engine.ts
+++ b/packages/vision-polyfill/src/drag-engine.ts
@@ -4,7 +4,7 @@ import { DragObjectType, isNode } from '@ali/lowcode-designer';
 const dragon = designer.dragon;
 const DragEngine = {
   from(shell: Element, boost: (e: MouseEvent) => any): any {
-    dragon.from(shell, (e) => {
+    return dragon.from(shell, (e) => {
       const r = boost(e);
       if (!r) {
         return null;