tree组件根据指定属性进行过滤

临时写的，仅供参考

示例，过滤isTrue属性为true的属性，子节点存在匹配数据，会直接将父节点返回

const arr = [
  {
    id: 1,
    name: '1',
    isTrue: false,
    children: [
      {
        id: 2,
        name: '2',
        isTrue: true,
        children: [
          {
            id: 3,
            name: '3',
            isTrue: true,
            children: []
          }
        ]
      }
    ]
  }, {
    id: 6,
    name: '6',
    isTrue: true,
    children: [


    ]
  }
]

const treeFilter = (list) => {
   if (!list) {
      return
   }
   return list.filter(item => {
      item.children = treeFilter(item.children)
      if (item.children && item.children.length) {
         return true
      } else {
         return item.isTrue == true
      }
   })
}

const deptOptions= treeFilter(arr)