How to develop tree components using Vue

<template> 
  <p class="ui menu"> 
   <template v-for="item in leftItems"> 
    <a " v-if="!item.children" @click="item.click"> 
     <i class="{{ item.icon }} icon" v-if="item.icon"></i>{{item.text}} 
     <p class="ui mini {{item.labelColor }} label" v-if="item.label"> 
      {{item.label}} 
     </p> 
    </a>  
   //如果有有children则说明是下拉菜单项，然后递归调用自身 
    <template v-else="item.children.length > 0"> 
     <p class="ui dropdown item"> 
      <i class="{{ item.icon }} icon" v-if="item.icon"></i>   
      <p class="text"> {{item.text}}</p> 
      <menubar :items="item.children" ></menubar> 
     </p> 
    </template> 
   </template> 
  //显示在右侧的菜单项，也是递归调用自身 
   <menubar :items="rightItems" v-if="rightItems.length > 0"></menubar> 
  </p> 
</template>

menubar:[ 
     {id:"a",text:"主页1",icon:"home",tips:"提示",label:"33",labelColor:"red",url:"#"}, 
     {id:"b",text:"菜单",icon:"edit",tips:"提示",url:"#",children:[ 
       {id:"a",text:"菜单1",click:"test3",icon:"home",url:"#"}, 
       {id:"a",text:"菜单2",click:"test3",icon:"home",url:"#"} 
     ]}, 
     {id:"bb",text:"编辑",tab:"a",icon:"user",vlink:"#"}, 
     {id:"bb",text:"文件",tab:"b",icon:"user",click:"test1"}, 
     {id:"bb",text:"帮助",tab:"c",icon:"help",click:"test2"}, 
     {id:"bb",text:"工具",icon:"user",url:"www.baidu.com"}, 
     {id:"c",text:"设置",icon:"home",tips:"提示",enabled:true,color:"blue",url:"#",right:true,label:"",children:[ 
        {id:"bbb",text:"配置",icon:"home",tips:"提示",click:"test3"}, 
        {id:"adsd",text:"退出",icon:"home",tips:"提示",vlink:"/workdesk",url:"#"} 
        ] 
      } 
   ]

events:{ 
  eventa:function(){....}, 
  eventb:function(){....}, 
}

<a @click="onMenuItemClick(item,$event)" data-tab="{{item.tab}}" v-link="item.vlink" href="{{item.url}}" rel="external nofollow" v-if="!item.children" :class="[{&#39;active&#39;:item.active==true,&#39;disabled&#39;:item.enabled==false},item.color,&#39;item&#39;]" title="{{item.tips}}"> 
     <i class="{{ item.icon }} icon" v-if="item.icon"></i>{{item.text}} 
     <p class="ui mini {{item.labelColor }} label" v-if="item.label"> 
      {{item.label}} 
     </p> 
    </a>

methods:{ 
  onMenuItemClick:function(item,$event){    
   if(this.subMenu){ 
    this.$dispatch("menuItemClick",item,$event)  
   }else{ 
    if(item.click){ 
     this.$parent.$emit(item.click,item) 
    } 
   }   
  } 
 }

events:{ 
  menuItemClick:function(item,$event){ 
   if(!this.subMenu){ 
    this.$parent.$emit(item.click,item) 
   }else{ 
    return true 
   } 
  } 
 },

<MenuBar> 
 <button scoped="false"></button> 
<button scoped="false"></button> 
</MenuBar>