import Vue from 'vue';

ES6神奇的import...from...命令: https://www.jianshu.com/p/c0be35475e54

import Vue from 'vue';
import App from './App';
import router from './route';
import axios from 'axios';
import './less/index';

 

import Vue from 'vue';

其实最完整的写法是：

import Vue from "../node_modules/vue/dist/vue.js";