Vuejs utilise des composants récursifs pour implémenter des répertoires arborescents

{
  id：YH, 
  name：银行, 
  pid：0, 
  childList：[{
    id:YH******, 
    name:国家开发银行, 
    pid:YH, 
    childList:[{
      id:YH*****3, 
      name:国家开发银行香港分行, 
      pid:YH******, 
      childList:[]
    }, 
    {
      id=YH*****1, 
      name=国家开发银行广东省分行, 
      pid=YH******, 
      childList=[]
    }, {
      id=YH*****2, 
      name=国家开发银行深圳分行, 
      pid=YH******, 
      childList=[]
    }
  ]}
}

 <li>
  <p>
   <i @click=&#39;toggle&#39; v-if=&#39;isFolder&#39; class="mui-icon iconfont" :class="[open?&#39;icon-wenjianjia&#39;:&#39;icon-wenjianjiaguanbi&#39;]"></i>
   <!--isFolder判断是否存在子级改变图标-->
   <i @click=&#39;toggle&#39; class="mui-icon iconfont icon-wenjian" style="color: #00ccff" v-else></i>
   <!--这里用到的方法是给父组件传值，具体可看上一篇文章-->
   <span @click="propInstCode(model);propInstName(model)">
    {{model.name}}
   </span>
  </p>
  <ul v-show="open" v-if=&#39;isFolder&#39;>
   <tree-menu v-for=&#39;cel in model.childList&#39; :model=&#39;cel&#39;></tree-menu>
  </ul>
 </li>

export default {
  name: 'treeMenu',
  props: ['model'],
  components: {}
}

data() {
   return {
    open: false,
    isFolder: true,
   }
 },

computed: {
  isFolder() {
    return this.model.childTreeNode && this.model.childTreeNode.length
  }
}

created(){
   //将isFolder放在这里判断可以识别出最底层菜单，然后改变图标，放在computed的话会一直报错并识别不出最底层菜单改变样式
   this.isFolder = this.model.childList && this.model.childList.length;
  }

methods: {
   toggle: function() {
    if(this.isFolder){
     this.open = !this.open;
    }
   },
}

<ul class="tree_container" v-for="item in list">
  <my-menu-tree :model=&#39;item&#39; :instType=&#39;this.instType&#39;></my-menu-tree>
</ul>