useStore is missing a type declaration

[ChrisShank]

Version

4.0.0-beta.1

Reproduction link

https://github.com/ChrisShank/vue-next-webpack-preview

Steps to reproduce

Remove the type declaration of 'useStore' I added in 'vuex-shim.d.ts', and there will be a compile-time TS error.

What is expected?

The type for useStore to exist.

What is actually happening?

On the line:

import { useStore } from 'vuex'

There is an error:

TS2614: Module 'vue-next-webpack-preview/node_modules/vuex/types"' has no exported member 'useStore'. Did you mean to use 'import useStore from "vue-next-webpack-preview/node_modules/vuex/types"' instead?

[surmon-china]

@ChrisShank Override the vuex's type definition in TypeScript.

declare module "vuex" {
  function useStore<T = any>(key?: string): T
}

[surmon-china]

It seems that the type is difficult to cover, you can do this:

// @ts-ignore
import { createStore, useStore as useVuexStore } from 'vuex'

const store =  createStore<StoreState>({})

export default store
export function useStore(): typeof store {
  return useVuexStore()
}

[ChrisShank]

@surmon-china I currently am here

I think that a type should either be included with the package (similar to the one you first mentioned) or documented that the user is expected to provide their own shim.

[kiaking]

Thanks for the report! Yea we must add this one 👍