I work with microfrontend single-spa (https://single-spa.js.org/) I create a store

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

export default new Vuex.Store({
 state: {
 count: 0
},
mutations: {

}
})

in src/main.js i import it

import Vue from 'vue';
import singleSpaVue from 'single-spa-vue';
import 'devextreme/dist/css/dx.light.css';
import App from './App.vue';
import store from './store';
console.log("