From d3979d365fbfaeb2dcd89842567e1c4bb4936922 Mon Sep 17 00:00:00 2001
From: Sedo <107271763+LikiosSedo@users.noreply.github.com>
Date: Wed, 25 Mar 2026 13:40:52 +0800
Subject: [PATCH 1/3] feat: re-export TypedHeaders and header map types from
 fetchdts

Re-export TypedHeaders, RequestHeaders, ResponseHeaders,
RequestHeaderMap, and ResponseHeaderMap so consumers can type
functions that accept h3 headers without importing fetchdts directly.

Closes #1308
---
 src/index.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/index.ts b/src/index.ts
index 9893c62f7..b375c5bb7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -43,6 +43,14 @@ export type {
   TypedServerRequest,
 } from "./types/handler.ts";
 
+export type {
+  TypedHeaders,
+  RequestHeaders,
+  ResponseHeaders,
+  RequestHeaderMap,
+  ResponseHeaderMap,
+} from "fetchdts";
+
 export {
   defineHandler,
   defineLazyEventHandler,

From 9ad773dd766860e971bbef0ba35ce567cec72f73 Mon Sep 17 00:00:00 2001
From: Sedo <107271763+LikiosSedo@users.noreply.github.com>
Date: Wed, 25 Mar 2026 13:48:18 +0800
Subject: [PATCH 2/3] refactor: export header types via types/handler.ts
 instead of direct fetchdts re-export
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Avoids build issues since fetchdts is a devDependency — the build
tool (obuild) inlines types referenced through h3's own modules
but may not handle direct re-exports from external packages.
---
 src/index.ts | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index b375c5bb7..a5b518403 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -41,15 +41,12 @@ export type {
   FetchableObject,
   HTTPHandler,
   TypedServerRequest,
-} from "./types/handler.ts";
-
-export type {
   TypedHeaders,
   RequestHeaders,
   ResponseHeaders,
   RequestHeaderMap,
   ResponseHeaderMap,
-} from "fetchdts";
+} from "./types/handler.ts";
 
 export {
   defineHandler,

From 6b5743021105f732c0718e81fce537c1ec605a31 Mon Sep 17 00:00:00 2001
From: Sedo <107271763+LikiosSedo@users.noreply.github.com>
Date: Wed, 25 Mar 2026 13:48:30 +0800
Subject: [PATCH 3/3] feat: import and re-export header types from fetchdts

Import TypedHeaders, RequestHeaders, ResponseHeaders, RequestHeaderMap,
and ResponseHeaderMap from fetchdts and re-export them so the build
tool can inline them properly.
---
 src/types/handler.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/types/handler.ts b/src/types/handler.ts
index 8709c9d3c..d92134ba5 100644
--- a/src/types/handler.ts
+++ b/src/types/handler.ts
@@ -1,5 +1,5 @@
 import type { ServerRequest } from "srvx";
-import type { TypedRequest, TypedResponse, ResponseHeaderMap } from "fetchdts";
+import type { TypedRequest, TypedResponse, TypedHeaders, RequestHeaders, ResponseHeaders, RequestHeaderMap, ResponseHeaderMap } from "fetchdts";
 import type { H3Event, HTTPEvent } from "../event.ts";
 import type { MaybePromise } from "./_utils.ts";
 import type { H3RouteMeta } from "./h3.ts";
@@ -85,3 +85,5 @@ export type InferEventInput<
   Event extends HTTPEvent,
   T,
 > = void extends T ? (Event extends HTTPEvent<infer E> ? E[Key] : never) : T;
+
+export type { TypedHeaders, RequestHeaders, ResponseHeaders, RequestHeaderMap, ResponseHeaderMap };