兄弟問題鏈接：https://segmentfault.com/q/10...默認展示 首頁 文字點擊分類 組件內容不顯示http://localhost:8080/Fenapp.vue<template>  <div id="app">    <Header></Header>    <div class="main">      <keep-alive>          <router-view></router-view>      </keep-alive>    </div>        <Footer></Footer>  </div></template>router/index.jsimport Vue from 'vue'import Router from 'vue-router'import Home from '@/components/Home'import Fen from '@/components/Fen'import Cart from '@/components/Cart'import Center from '@/components/Center'Vue.use(Router)export default new Router({  mode: 'history',  watch: {    '$route' (to, from) {      // data數據操作    }  } ,  routes: [    {      path: '/',      name: 'Home',      component: Home    },    {      path: '/',      name: 'Fen',      component: Fen    },    {      path: '/',      name: 'Cart',      component: Cart    },    {      path: '/',      name: 'Center',      component: Center    }  ]})