From 2bff8dc7884f418895adf57cd58eabd98d7b1926 Mon Sep 17 00:00:00 2001
From: "Xavier.Meng" <xavier.meng@fanruan.com>
Date: Tue, 3 Jan 2023 14:21:24 +0800
Subject: [PATCH] =?UTF-8?q?=E6=97=A0jira=20fix(base/extend):=20=E4=BF=AE?=
 =?UTF-8?q?=E6=94=B9=E6=B3=9B=E5=9E=8B?=
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---
 typescript/core/base.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/typescript/core/base.ts b/typescript/core/base.ts
index e681f2ac4..137f6c2da 100644
--- a/typescript/core/base.ts
+++ b/typescript/core/base.ts
@@ -178,7 +178,7 @@ export interface _base {
     functions: (object: object) => string[];
 
     extend<T extends object>(object: T): T;
-    extend<T extends object, U extends object>(object: T, ...sources: U[]): T & UnionToIntersection<U>;
+    extend<T extends object, U>(object: T, ...sources: U[]): T & UnionToIntersection<NonNullable<U>>;
 
     defaults: (object: object, ...sources: any[]) => object;