From 0fe60552a3ebd47eb405521b38b9da2dc66e1af0 Mon Sep 17 00:00:00 2001
From: Nathan Walker <walkerrunpdx@gmail.com>
Date: Sat, 5 Jul 2025 22:21:04 -0700
Subject: [PATCH] chore: define __metadata for bundlers

---
 packages/core/globals/index.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/packages/core/globals/index.ts b/packages/core/globals/index.ts
index 5cc9397cf..51d7dd959 100644
--- a/packages/core/globals/index.ts
+++ b/packages/core/globals/index.ts
@@ -381,6 +381,27 @@ function isTestingEnv() {
 	return typeof jest !== 'undefined' || global.__UNIT_TEST__;
 }
 
+if (typeof global.__metadata === 'undefined') {
+	/**
+	 * TS decorator metadata helper.
+	 * @param metadataKey   the metadata key (e.g. "design:type")
+	 * @param metadataValue the metadata value (e.g. the constructor function)
+	 * @returns a decorator function, or undefined if Reflect.metadata isn’t available
+	 */
+	global.__metadata = (metadataKey, metadataValue) => {
+		if (
+			typeof Reflect === 'object' &&
+			// @ts-expect-error
+			typeof Reflect.metadata === 'function'
+		) {
+			// Delegate to the reflect-metadata shim
+			// @ts-expect-error
+			return Reflect.metadata(metadataKey, metadataValue);
+		}
+		// no-op if no Reflect.metadata
+	};
+}
+
 if (!global.NativeScriptHasInitGlobal && !isTestingEnv()) {
 	initGlobal();
 }