详解Vuex中mapState的具体用法

import Vue from 'vue'
import Vuex from 'vuex'
import mutations from './mutations'
import actions from './action'
import getters from './getters'

Vue.use(Vuex)

const state = {
 userInfo: { phone: 111 }, //用户信息
 orderList: [{ orderno: '1111' }], //订单列表
 orderDetail: null, //订单产品详情
 login: false, //是否登录
}

export default new Vuex.Store({
 state,
 getters,
 actions,
 mutations,
})

computed: {
   ...mapState([
    'orderList',
    'login'
   ]),
  }, 
  mounted(){ 
   console.log(typeof orderList); ==>undefind
   console.log(typeof this.orderList)==>object
  }