tall-mui-3-project/src/store/index.js

import Vue from 'vue';
import Vuex from 'vuex';
import home from './home/index';
import db from './db/index';
import user from './user/index';
import messages from './messages/index';
import socket from './socket/index';

Vue.use(Vuex);
export default new Vuex.Store({ modules: { home, db, user, messages, socket } });