Vue报错: Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘protocol‘)

问题原因，main.js中引用axios区别:

import axios from "axios";Vue.use(axios);

正确写法:

import axios from "axios";Vue.prototype.axios = axios;

通过调查资料了解到:

1、不是为了vue写的插件(插件内要处理)不支持Vue.use()加载方式
2、非vue官方库不支持new Vue()方式
3、每一个vue组件都是Vue的实例，所以组件内this可以拿到Vue.prototype上添加加的属性和方法

import from "vuex";        // 官方插件vuex
Vue.use(Vuex);
Vue.prototype.axios = axios;

主要是由于插件内部编码方式不同，axios不是按照vue规则设计的插件（准确地说不是专门为vue服务），建议用Vue.prototype添加到vue原型链上使用；

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Vue报错: Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘protocol‘)

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