根据某个子节点id获取该节点的所有父节点id

     treeData: [
        {
          id: 10,
          label: '张三',
          children: [
            {
              id: 11,
              label: '张三 1-1',
              children: [
                {
                  id: 111,
                  label: '张三 1-1-1'
                },
                {
                  id: 112,
                  label: '张三 1-1-2'
                }
              ]
            }
          ]
        },
        {
          id: 20,
          label: '李四',
          children: [
            {
              id: 21,
              label: '李四 2-1'
            },
            {
              id: 22,
              label: '李四 2-2'
            }
          ]
        },
        {
          id: 30,
          label: '王二 3',
          children: [
            {
              id: 31,
              label: '王二 3-1'
            },
            {
              id: 32,
              label: '王二 3-2'
            }
          ]
        }
      ]

   getIdList(id, tree) {
      let arr = []
      for (let i = 0; i < tree.length; i++) {
        let item = tree[i]
        arr = []
        arr.push(item.id)
        if (id === item.id) {
          return arr
        } else {
          if (item.children && item.children.length > 0) {
            arr = arr.concat(this.getIdList(id, item.children))
            if (arr.includes(id)) {
              return arr
            }
          }
        }
      }
    }

console.log(this.getIdList(111, this.treeData))