sveltejs · Rich-Harris · Jan 4, 2022 · Jan 4, 2022 · Jan 4, 2022 · Jan 4, 2022
diff --git a/.changeset/grumpy-days-compete.md b/.changeset/grumpy-days-compete.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Allow multiple different headers returned from one endpoint
diff --git a/packages/kit/src/utils/http.js b/packages/kit/src/utils/http.js
@@ -1,5 +1,5 @@
 /**
- * @param {Record<string, string | string[]>} headers
+ * @param {Record<string, string | string[] | undefined>} headers
  * @param {string} key
  * @returns {string | undefined}
  * @throws {Error}

diff --git a/packages/kit/types/endpoint.d.ts b/packages/kit/types/endpoint.d.ts
@@ -5,7 +5,7 @@ type DefaultBody = JSONString | Uint8Array;
 
 export interface EndpointOutput<Body extends DefaultBody = DefaultBody> {
 	status?: number;
-	headers?: ResponseHeaders;
+	headers?: Partial<ResponseHeaders>;
 	body?: Body;
 }
 

diff --git a/packages/kit/types/hooks.d.ts b/packages/kit/types/hooks.d.ts
@@ -15,7 +15,7 @@ export interface ServerRequest<Locals = Record<string, any>, Body = unknown> {
 
 export interface ServerResponse {
 	status: number;
-	headers: ResponseHeaders;
+	headers: Partial<ResponseHeaders>;
 	body?: StrictBody;
 }