diff --git a/typescript/core/widget.ts b/typescript/core/widget.ts
index 0a1b63246..4c1fc9d2f 100644
--- a/typescript/core/widget.ts
+++ b/typescript/core/widget.ts
@@ -42,8 +42,8 @@ export interface _Widget extends _OB {
     element: {
         width(): number;
         height(): number;
-        width(width: number | string): _Widget['element'];
-        height(height: number | string): _Widget['element'];
+        width(width: number | string): _Widget["element"];
+        height(height: number | string): _Widget["element"];
         [key: string]: any;
     };
 
@@ -110,7 +110,7 @@ export interface _Widget extends _OB {
     /**
      * 更新前
      */
-    shouldUpdate?(): void;
+    shouldUpdate?(...args: any[]): void;
 
     /**
      * 更新
@@ -449,8 +449,8 @@ export declare class Widget extends OB {
     element: {
         width(): number;
         height(): number;
-        width(width: number | string): Widget['element'];
-        height(height: number | string): Widget['element'];
+        width(width: number | string): Widget["element"];
+        height(height: number | string): Widget["element"];
         [key: string]: any;
     };
 
@@ -783,6 +783,11 @@ export declare class Widget extends OB {
      */
     _unMount(): void;
 
+    /**
+     * watch响应式数据
+     */
+    __watch<T extends (...args: any) => any>(getter: T, handler: Function, options?: Obj): ReturnType<T>
+
     /**
      * hang元素
      */