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 }, //使用者資訊
    orderList: [{ orderno: '1111' }], //訂單列表
    orderDetail: null, //訂單產品詳情
    login: false, //是否登入
 

}

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
}

mapState通過擴充套件運算子將store.state.orderList 對映this.orderList 這個this 很重要，這個對映直接對映到當前Vue的this物件上。

所以通過this都能將這些物件點出來，同理，mapActions, mapMutations都是一樣的道理。牢記~~~