Vue.js：import axios報錯Cannot read property ‘protocol’ of undefined

最近Console一直出現 Cannot read property ‘protocol’ of undefined 因為功能都正常，實在看不出什麼問題
同事就幫忙Google一下，原來是不能這樣引用

import Vue from 'vue’
import App from './App’
import router from './router’
import axios from ‘axios’

Vue.use(axios);

正解如下

import axios from 'axios';
Vue.prototype.$http = axios;

引用來源：关于import axios报错Cannot read property ‘protocol’ of undefined