des/src/main.js

import Vue from 'vue'
import Vuex from 'vuex'
import App from './App.vue'
import router from './router'
import store from './store'
import axios from 'axios'
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
import echarts from 'echarts'
import IPconfig from '../IPconfig.js'
Vue.prototype.GLOBAL = IPconfig
Vue.config.productionTip = false
Vue.prototype.axios = axios
Vue.use(ElementUI)
Vue.use(Vuex)
Vue.use(echarts)
new Vue({
  store,
  router,
  render: h => h(App),
  create () {
    if (localStorage.getItem('isLogin') === null) {
      localStorage.setItem('isLogin', '')
    }
    this.$store.state.isLogin = localStorage.getItem('isLogin')
  }
}).$mount('#app')