From f555d9236b4914fce235729873717f557c924f25 Mon Sep 17 00:00:00 2001
From: sue71 <s.masaki07@gmail.com>
Date: Wed, 27 Jun 2018 17:46:57 +0900
Subject: [PATCH] feat: add type annotation for the context of actions and
 mutations

---
 types/index.d.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/types/index.d.ts b/types/index.d.ts
index 585b7d6b0b..5c69278352 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -86,7 +86,7 @@ export interface StoreOptions<S> {
   strict?: boolean;
 }
 
-export type ActionHandler<S, R> = (injectee: ActionContext<S, R>, payload: any) => any;
+export type ActionHandler<S, R> = (this: Store<S>, injectee: ActionContext<S, R>, payload: any) => any;
 export interface ActionObject<S, R> {
   root?: boolean;
   handler: ActionHandler<S, R>;
@@ -94,7 +94,7 @@ 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> = (this: Store<S>, state: S, payload: any) => any;
 export type Plugin<S> = (store: Store<S>) => any;
 
 export interface Module<S, R> {