From 63f9b87b41e3212ab797ff3085c4c96998611e1e Mon Sep 17 00:00:00 2001
From: Thorsten Luenborg <t.luenborg@googlemail.com>
Date: Thu, 25 Nov 2021 18:20:09 +0100
Subject: [PATCH] fix: ensure custom properties are copied onto bound function

---
 packages/runtime-core/src/componentPublicInstance.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/runtime-core/src/componentPublicInstance.ts b/packages/runtime-core/src/componentPublicInstance.ts
index 42fe3c73e06..25f24f93878 100644
--- a/packages/runtime-core/src/componentPublicInstance.ts
+++ b/packages/runtime-core/src/componentPublicInstance.ts
@@ -356,8 +356,8 @@ export const PublicInstanceProxyHandlers: ProxyHandler<any> = {
           return desc.get.call(instance.proxy)
         } else {
           const val = globalProperties[key]
-          return isFunction(val) && Object.keys(val).length === 0
-            ? val.bind(instance.proxy)
+          return isFunction(val)
+            ? Object.assign(val.bind(instance.proxy), val)
             : val
         }
       } else {