vue中的router-view组件的使用教程

<template>
 <div class="navbar">
 <ul id="main">
 <li><router-link to="/food" >商品</router-link></li>
 <li><router-link to="/rating">评价</router-link></li>
 <li><router-link to="/seller">商家</router-link></li>
 </ul>
   <!-- 路由匹配到的组件将渲染在这里 -->
   <router-view></router-view>
 </div>
</template>

{
  path: '/',
  name: 'index',
  component: index,
  redirect:'/food',
  children:[
 {
  path: 'food',
  name: 'food',
  component: food
 },
 {
  path: 'seller',
  name: 'seller',
  component: seller
 },
 {
  path: 'rating',
  name: 'rating',
  component: rating
 }
  ]
 },

<template>
 <div class="index">
 <div class="nav"></div>
 <div class="shop-header">
 <div class="imgbox"><img src="../../static/img/56.jpg" alt="" /></div>
 <h2>黄蜀郞鸡公煲<span class="ico"></span></h2>
 <p class="info1"><span>*4.6</span><span>月售738</span><span>商家配送约44分钟</span><span>距离345m</span></p>
 <p class="info2">店内免费涮煲，（蔬菜、小料、主食、糕点、凉菜、水果、免费吃）闻香识辣，入口知麻，一锅两吃，独具特色！！！外卖米饭请自点！！评价问题商家会一一看，可能不能及时回复。有问题详询18232966036</p>
 </div>
 <navbar></navbar>
 </div>
</template>
<script>

import navbar from '@/components/navbar'
 import food from '@/components/food'
 export default {
 name: 'HelloWorld',
 data() {
 return {
 
 msg:[]
 }
 },
 components: {
 navbar
 
 }
 }
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang="stylus">
 @import '../../static/css/index.styl';
</style>