From 9e83ff93bdaad011a078e3fe0fd4ba1a18732263 Mon Sep 17 00:00:00 2001
From: David Ortner <david@ortner.se>
Date: Mon, 18 Mar 2024 15:01:42 +0100
Subject: [PATCH] chore: [#1315] Fixes problem with synd fetch headers

---
 .../happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts b/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts
index d9e328179..e1ff19c63 100644
--- a/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts
+++ b/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts
@@ -130,7 +130,7 @@ export default class FetchRequestHeaderUtility {
 		const httpRequestHeaders = {};
 
 		for (const header of Object.values(headers[PropertySymbol.entries])) {
-			httpRequestHeaders[header.name] = header.value;
+			httpRequestHeaders[header.name] = header.value.join(', ');
 		}
 
 		return httpRequestHeaders;