//获取到数据
res.data.forEach((item)=>{
 if(item.children.length>0){
 item = this.dispose(item)
 }
})

//递归处理数据
dispose(e){
 if(e.children.length>0){
  e.children.forEach(item => {
   this.dispose(item)
  })
 }else{
  delete e.children;
  return e;
 }
},