<router-view class="view one"></router-view> 
<router-view class="view two" name="a"></router-view> 
<router-view class="view three" name="b"></router-view> 
const router = new VueRouter({ 
  routes: [ 
    { 
      path: '/', 
      components: { default: Foo, a: Bar, b: Baz } 
    } 
  ] 
})

<template> 
  <div id="app"> 
    <router-view></router-view> 
    <router-view name="nav"></router-view> 
    <router-view name="side"></router-view> 
  </div> 
</template>

{ 
  path: '/home', 
  name: 'Home', 
  components: { 
    default: Home, 
    nav: Nav,//不给的话就不渲染 
    side: Side 
  }, 
  children: [ 
    { path: '/', component: Home },//不给的话就匹配不到子组件，就不渲染 
    { path: 'post', component: Post } 
  ] 
}