vue3 + Ant Design 实现双表头表格（横向表头+纵向表头）

 1 // 纵向表头数组 tableColumns
 2 const tableColumns = ref([
 3   {
 4     label: "日（24小时）数据浓度均值",
 5     value: "monthMaxDayValue",
 6   },
 7   {
 8     label: "小时数据平均浓度均值",
 9     value: "monthHourValue",
10   },
11 ]);

 1 //定义横向表头列 columns
 2  const columns = ref([]);
 3 //定义表格数据
 4  const list = ref([]); 
 5 
 6  // 先添加第一列
 7  columns.value = [
 8       {
 9         title: "",
10         dataIndex: "timeType",
11         width: 190,
12        fixed: "left",
13      },
14   ];
15 
16 //处理接口返回的数据data，动态拼接表头数组 columns
17 data.forEach(item => {
18      const obj = {
19         id: item.enterpriseId,
20         parentId: null,
21         title: item.enterpriseName,
22         align: "center",
23         children: [],
24       };
25       if (item.pointFactors.length) {
26           item.pointFactors.forEach(element => {
27               list.push({
28                 name: element.pointName,
29                 id: element.pointId,
30                 monthMaxDayValue: element.monthMaxDayValue,
31                 monthHourValue: element.monthHourValue,
32               });
33               const childObj = {
34                 id: element.pointId,
35                 parentId: item.enterpriseId,
36                 title: element.pointName,
37                 width: 130,
38                 align: "center",
39                 dataIndex: element.pointId,
40                 customRender: ({ record }) => {
41                   return record[element.pointId]
42                     ? record[element.pointId]
43                     : "-";
44                 },
45               };
46               obj.children.push(childObj);
47           });
48      }
49      columns.value.push(obj);
50 });

 1 // tableColums  已定义的纵向表头
 2 // tableData   已定义的表格数组
 3 
 4  for (const tab of tableColumns.value) {
 5      const col: any = Object.create(null);
 6 
 7      list.forEach((item, index) => {
 8          col.timeType = tab.label;
 9          col[list[index + 0].id] = item[tab.value];
10      });
11      tableData.value.push(col);
12 }

 <a-table
     :columns="columns"
     :data-source="tableData"
     :pagination="false"
     row-key="id"
     bordered
 />