From 6f0063e5d372c5d86a001ffe9babc9800d2a423f Mon Sep 17 00:00:00 2001
From: David Sandoz <davidsandoz@users.noreply.github.com>
Date: Thu, 7 Mar 2019 15:15:33 +0100
Subject: [PATCH] Make mutation payload optional in definition file

When testing a mutation without payload in TypeScript, it complains that about the missing payload, even though it's not mandatory.

This PR simply makes the payload optional.

Fixes #1491
---
 types/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/index.d.ts b/types/index.d.ts
index 46316bb2a..6c274b1b5 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -105,7 +105,7 @@ export interface ActionObject<S, R> {
 
 export type Getter<S, R> = (state: S, getters: any, rootState: R, rootGetters: any) => any;
 export type Action<S, R> = ActionHandler<S, R> | ActionObject<S, R>;
-export type Mutation<S> = (state: S, payload: any) => any;
+export type Mutation<S> = (state: S, payload?: any) => any;
 export type Plugin<S> = (store: Store<S>) => any;
 
 export interface Module<S, R> {