From 3435b7f1e1ca38fdee8f3b89e2d2667f125d01b5 Mon Sep 17 00:00:00 2001
From: Arsh <69170106+lilnasy@users.noreply.github.com>
Date: Wed, 24 Jan 2024 17:17:33 +0000
Subject: [PATCH] fix(vercel): make Astro.cookies work again (#9809)

* addCookieHeaders

* add changeset
---
 .changeset/two-ducks-give.md                              | 5 +++++
 packages/integrations/vercel/src/serverless/entrypoint.ts | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/two-ducks-give.md

diff --git a/.changeset/two-ducks-give.md b/.changeset/two-ducks-give.md
new file mode 100644
index 000000000000..5782469390ec
--- /dev/null
+++ b/.changeset/two-ducks-give.md
@@ -0,0 +1,5 @@
+---
+"@astrojs/vercel": patch
+---
+
+Fixes an issue where the serverless function ignored cookies added using Astro.cookies.
diff --git a/packages/integrations/vercel/src/serverless/entrypoint.ts b/packages/integrations/vercel/src/serverless/entrypoint.ts
index a300b8a12f8b..fe88c367d320 100644
--- a/packages/integrations/vercel/src/serverless/entrypoint.ts
+++ b/packages/integrations/vercel/src/serverless/entrypoint.ts
@@ -20,7 +20,7 @@ export const createExports = (manifest: SSRManifest) => {
 				: Array.isArray(localsHeader)
 					? JSON.parse(localsHeader[0])
 					: {};
-		const webResponse = await app.render(req, { locals, clientAddress });
+		const webResponse = await app.render(req, { addCookieHeader: true, clientAddress, locals });
 		await NodeApp.writeResponse(webResponse, res);
 	};