vxe-table 合并单元格

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<vxe-table     @cell-click="handleClickCell"     :span-method="spanMethods"  //自动合并单元格     :data="tableData2">   </vxe-table>   spanMethods({row, $rowIndex, column, data}){      let fields = ["clothtktno", "contactno"]       let cellValue = row[column.property]       if (cellValue && fields.includes(column.property)) {         let prevRow = data[$rowIndex - 1]         let nextRow = data[$rowIndex + 1]         if (prevRow && prevRow[column.property] === cellValue) {           return {rowspan: 0, colspan: 0}         } else {           let countRowspan = 1           while (nextRow && nextRow[column.property] === cellValue) {             nextRow = data[++countRowspan + $rowIndex]           }           if (countRowspan > 1) {             return {rowspan: countRowspan, colspan: 1}           }         }       }       },