From bac1c6065bb99e64713959f98bbffa098d8f11ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20Lyngs=C3=B8?= <niels.lyngso@gmail.com>
Date: Thu, 6 Jul 2023 10:47:10 +0200
Subject: [PATCH] fallback to Symbol

---
 src/Umbraco.Web.UI.Client/src/libs/class-api/class.mixin.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Umbraco.Web.UI.Client/src/libs/class-api/class.mixin.ts b/src/Umbraco.Web.UI.Client/src/libs/class-api/class.mixin.ts
index a58f3c0a9b..a306982f67 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/class-api/class.mixin.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/class-api/class.mixin.ts
@@ -53,7 +53,7 @@ export const UmbClassMixin = <T extends ClassConstructor>(superClass: T) => {
 		constructor(host: UmbControllerHost, controllerAlias: UmbControllerAlias) {
 			super();
 			this._host = host;
-			this._controllerAlias = controllerAlias ?? undefined; // ?? Symbol();
+			this._controllerAlias = controllerAlias ?? Symbol(); // This will fallback to a Symbol, ensuring that this class is only appended to the controller host once.
 		}
 
 		getHostElement(): EventTarget {