From 082234bd413983e1dcb7ba7515087f5e769f5f9f Mon Sep 17 00:00:00 2001
From: Bram Zijp <bramzijp1@gmail.com>
Date: Sun, 11 Apr 2021 15:02:40 +0200
Subject: [PATCH] fix: dont mutate Story prop types to optional

---
 lib/addons/src/types.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/addons/src/types.ts b/lib/addons/src/types.ts
index 445e8b5731c4..8497e7f9f175 100644
--- a/lib/addons/src/types.ts
+++ b/lib/addons/src/types.ts
@@ -168,7 +168,7 @@ export interface BaseAnnotations<Args, StoryFnReturnType> {
    * Dynamic data that are provided (and possibly updated by) Storybook and its addons.
    * @see [Arg story inputs](https://storybook.js.org/docs/react/api/csf#args-story-inputs)
    */
-  args?: Partial<Args>;
+  args?: Args;
 
   /**
    * ArgTypes encode basic metadata for args, such as `name`, `description`, `defaultValue` for an arg. These get automatically filled in by Storybook Docs.