全局封装api

1. main.js  里面   import * as API from "@/api";

2. //引入API
   import "@/mock/mockServe";
   new Vue({
     router,
     store,
     render: (h) => h(App),
     beforeCreate() {
       Vue.prototype.$bus = this;
       Vue.prototype.$API = API;
     },
   }).$mount("#app");

    

3. 直接调用 
   let result = await this.$API.reqOrder(tradeNo, data)