Vue tree树状结构数据转扁平数据

//数据结构可参考饿了么UI
 treeData: [{
        id: 1,
        label: 'Level one 1',
        type: 1,
        children: [{
          id: 4,
          label: 'Level two 1-1',
          type: 2,
          children: [{
            id: 9,
            label: 'Level three 1-1-1',
            type: 3
          }, {
            id: 10,
            label: 'Level three 1-1-2',
            type: 3
          }]
        }, {
          id: 11,
          label: 'Level three 1-2',
          type: 2,
          children: [{
            id: 12,
            label: 'Level three 1-2-1',
            type: 3
          }, {
            id: 13,
            label: 'Level three 1-2-2',
            type: 3
          }, {
            id: 14,
            label: 'Level three 1-2-3',
            type: 3
          }, {
            id: 15,
            label: 'Level three 1-2-4',
            type: 3
          }]
        }]
      }]

//转结构（list就是你要转的树状数据）
 treeToList(list) {
      let res = []
      for (const item of list) {
        const { children, ...i } = item
        if (children && children.length) {
          res = res.concat(this.treeToList(children))
        }
        res.push(i)
      }
      return res
    }
//查看数据是否转换成功
  const treeList = this.treeToList(this.treeData)
  console.log('树状结构转扁平结构', treeList)   

参考文档Vue tree树状结构数据转扁平数据_vue树形结构转化为平行结构-CSDN博客