From 75321d3e19a62268b4efc5bc1ade0b7e53bcb390 Mon Sep 17 00:00:00 2001
From: Matt Brophy <matt@brophy.org>
Date: Mon, 29 Apr 2024 09:20:06 -0400
Subject: [PATCH] Add undefined to useActionData type override (#9322)

---
 .changeset/happy-ladybugs-smoke.md            | 5 +++++
 packages/remix-react/future/single-fetch.d.ts | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/happy-ladybugs-smoke.md

diff --git a/.changeset/happy-ladybugs-smoke.md b/.changeset/happy-ladybugs-smoke.md
new file mode 100644
index 00000000000..2d8f4ca7bef
--- /dev/null
+++ b/.changeset/happy-ladybugs-smoke.md
@@ -0,0 +1,5 @@
+---
+"@remix-run/react": patch
+---
+
+Add `undefined` to `useActionData` type override
diff --git a/packages/remix-react/future/single-fetch.d.ts b/packages/remix-react/future/single-fetch.d.ts
index 5356fcb7be6..ddef3d7098c 100644
--- a/packages/remix-react/future/single-fetch.d.ts
+++ b/packages/remix-react/future/single-fetch.d.ts
@@ -1,4 +1,4 @@
-import type { MetaArgs, UNSAFE_MetaMatch } from "@remix-run/react";
+import type { MetaArgs, UIMatch, UNSAFE_MetaMatch } from "@remix-run/react";
 import type {
   LoaderFunctionArgs,
   ActionFunctionArgs,
@@ -57,7 +57,7 @@ declare module "@remix-run/react" {
     : never;
 
   export function useActionData<T>(): T extends ActionFunction_SingleFetch
-    ? SingleFetchSerialize_V2<T>
+    ? SingleFetchSerialize_V2<T> | undefined
     : never;
 
   export function useRouteLoaderData<T>(