嵌套路由

children:[]

<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显示在这里 -->
           <router-view></router-view>
    </div>

</template>