element tree只选择父，不选择孙

      updateChange(e, node, data) {
        const isChecked = e.path[0].checked
        const arr = []
        this.$set(data, 'isChecked', isChecked)
        arr.push(data.label)
        node.childNodes.map(res => {
          this.$set(res.data, 'isChecked', isChecked)
          arr.push(res.data.label)
        })
        arr.map(item => {
          if (isChecked) {
            this.checkList.push(item)
          } else {
            const i = this.checkList.indexOf(item)
             i > -1 && this.checkList.splice(i, 1)
          }
        })
        this.checkList = [... new Set(this.checkList)]
        console.log(this.checkList)
      }