import Vue from 'vue'import Router from 'vue-router'   Vue.use(Router)   let routes = []   const routerContext = require.context('./', true, /index/.js$/)   routerContext.keys().forEach(route => { // 如果是根目錄的 index.js、 不做任何處理    if (route.startsWith('./index')) {  return }      const routerModule = routerContext(route)    // 兼容 import export 和 require module.export 兩種規范 Es modules commonjs routes = [...routes, ...(routerModule.default || routerModule)]  })     export default new Router({ mode: 'history', base: process.env.BASE_URL, routes: routes})