From c63b82b20a4e262fcdb95b3d326f21cf3ec4e504 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=A0=E8=8D=A3=E6=9D=B0?=
 <zhangrongjie.123@bytedance.com>
Date: Fri, 1 Jul 2022 11:31:23 +0800
Subject: [PATCH] chore: addTag check

---
 src/util.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/util.ts b/src/util.ts
index b312a07..3af7f95 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -67,7 +67,7 @@ export function addTag(tag: string, target: any) {
         tags = [];
         Reflect.defineMetadata(CLASS_TAG, tags, target);
     }
-    tags.push(tag);
+    !tags.includes(tag) && tags.push(tag);
 }
 
 export function isClass(clazz: any) {