directory structure is as follows: I want to use the data in vuex"s state in axios.js 
 I print  console.log (store)  error  undefined  if you directly introduce  import state from". / store/state" , you can get the data in state, but you can"t write it this way. why? 
|--src
  |--api
     |--axios.js
  |--store
     |--index.js
     |--state.js
     |--mutations.js
     |--actions.js
  |--components
...  src/api/axios.js  
import Vuex from "vuex"
import store from "../store/index.js"
console.log(store)  src/store/index.js  
import Vue from "vue"
import Vuex from "vuex"
import state from "./state"
import mutations from "./mutations"
import actions from "./actions"
Vue.use(Vuex)
export default new Vuex.Store({
  state,
  mutations,
  actions,
})