From 3462c8d646a29e5ba1c3b8bb5ef6b84e4213616c Mon Sep 17 00:00:00 2001
From: johnsoncodehk <johnsoncodehk@gmail.com>
Date: Mon, 21 Mar 2022 06:58:21 +0800
Subject: [PATCH] fix: directives argument should be optional if argument could
 be undefined

close #1040
---
 packages/vue-typescript/src/utils/localTypes.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/vue-typescript/src/utils/localTypes.ts b/packages/vue-typescript/src/utils/localTypes.ts
index c736093fe..ac53d1a61 100644
--- a/packages/vue-typescript/src/utils/localTypes.ts
+++ b/packages/vue-typescript/src/utils/localTypes.ts
@@ -62,8 +62,8 @@ export type GlobalComponents =
 export declare function getVforSourceType<T>(source: T): ForableSource<NonNullable<T extends number ? number[] : T extends string ? string[] : T>>;
 export declare function getNameOption<T>(t?: T): T extends { name: infer N } ? N : undefined;
 export declare function directiveFunction<T>(dir: T):
-	T extends ObjectDirective<infer E, infer V> ? (value: V) => void
-	: T extends FunctionDirective<infer E, infer V> ? (value: V) => void
+	T extends ObjectDirective<infer E, infer V> ? undefined extends V ? (value?: V) => void : (value: V) => void
+	: T extends FunctionDirective<infer E, infer V> ? undefined extends V ? (value?: V) => void : (value: V) => void
 	: T;
 
 export type TemplateSlots<T> = T extends { __VLS_slots: infer S } ? S : {};