关于javascript:table-表格合并列

 //数据格式解决
        let condot = 0;
        this.spanArr = []; //重置
        this.tbList.forEach((item, index) => {
          if (index === 0) {
            this.spanArr.push(1);
          } else if (item.sysName === this.tbList[index - 1].sysName) {
            this.spanArr[condot] += 1;
            this.spanArr.push(0);
          } else {
            condot = index;
            this.spanArr.push(1);
          }
        });


                <td
                    v-if="spanArr[index]"
                    :rowspan="spanArr[index]"
                    class="titTb"
                    valign="middle"
                  >