el-table 表头竖向排列实现

<el-table
            style="width: 100%"
            :data="getValues"
            :show-header="false"
            :cell-style="cellStyle"
            border
          >
            <el-table-column
              v-for="(item, index) in getHeaders"
              :key="index"
              :prop="item"
            >
            </el-table-column>
          </el-table>

  data () {
    return {


      headers: [
        {
          prop: 'date',
          label: '先进企业',
        },
        {
          prop: 'name',
          label: '进步企业',
        },

      ],
      tableData: [
        {
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }
      ]

    };
  },

 computed: {
    getHeaders () {
      return this.tableData.reduce((pre, cur, index) => pre.concat(`value${index}`), ['title'])
    },
    getValues () {
      return this.headers.map(item => {
        return this.tableData.reduce((pre, cur, index) => Object.assign(pre, { ['value' + index]: cur[item.prop] }), { 'title': item.label, });
      });
    }
  },

   cellStyle ({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0) {
        return "background:#f5f7fa;text-align: center;";
      }
    },

       let flagTypeObjects = result.data.flagTypeObjects;

        let forNum = 0;
        let obj = {};
        let objList = {};
        // 组装headers数据
        for (let i = 0; i < flagTypeObjects.length; i++) {
          flagTypeObjects[i].prop = this.itemCellStr + flagTypeObjects[i].flagType;
          flagTypeObjects[i].propObj = 'orgName'//值为所以多一层prop处理
          flagTypeObjects[i].label = flagTypeObjects[i].flagTypeName;
          if (flagTypeObjects[i].flagTypeOrgDetails.length > forNum) {
            forNum = flagTypeObjects[i].flagTypeOrgDetails.length;
          }
          objList[flagTypeObjects[i].prop] = flagTypeObjects[i].flagTypeOrgDetails;
          obj[flagTypeObjects[i].prop] = '';
        }
        console.log(obj)
        console.log(objList)
        let newArr = [];
        // 组装table数据
        for (let j = 0; j < forNum; j++) {
          let newObj = { ...obj };
          for (let key in objList) {
            if (objList[key][j]) {
              // objList[key][j]为对象{"orgId": "","orgName": ""}，所以多一层prop处理
              newObj[key] = objList[key][j];
            }
          }
          newArr.push(newObj);
        }
        console.log(newArr)
        this.headers = [...flagTypeObjects];
        this.tableNotesData = newArr;