詳解Vuex中mapState的具體用法

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 }, //用戶信息
 orderList: [{ orderno: '1111' }], //訂單列表
 orderDetail: null, //訂單產品詳情
 login: false, //是否登錄
}

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
 }