export default {
   name:'xxx'
}

export default {
  name:'Detail'
}，
mounted(){
  this.getInfo();
}，
methods:{
  getInfo(){
     axios.get('/xx/detail.json',{
       params:{
        id:this.$route.params.id 
       }
     }).then(this.getInfoSucc)
   }
 }

 <div id="app"> 
  <keep-alive exclude="Detail">
   <router-view/>
  </keep-alive>
 </div>

 <div>
    <div v-for="(item,index) of list" :key="index">
      <div>
        <span class="item-title-icon"></span>
        {{item.title}}
      </div>
      <div v-if="item.children" >
        <detail-list :list="item.children"></detail-list>
      </div>
    </div>
 </div>
<script>
export default {
  name:'DetailList',//递归组件是指组件自身调用自身
  props:{
    list:Array
  }
}
</script>

const list = [{
     "title": "A",
     "children": [{
      "title": "A-A",
      "children": [{
       "title": "A-A-A"
      }]
     },{
        "title": "A-B"
     }]
    }, {
     "title": "B"
    }, {
     "title": "C"
    }, {
     "title": "D"
    }]