el-table 合并单元格

objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      const length =
        this.newlist[this.saveindex].data.newTable.length -
        this.newlist[this.saveindex].data.tag_list_all.length
      // 新增：处理前两行前两列的合并
      if (rowIndex < length && columnIndex < 2) {
        if (columnIndex === 0) {
          return {
            rowspan: 1,
            colspan: 2 // 合并两列
          }
        } else {
          return {
            rowspan: 0,
            colspan: 0 // 隐藏第二列的其他单元格（已被第一列合并）
          }
        }
      }
      if (columnIndex === 0 && rowIndex >= length) {
        const _row = this.flitterData(
          this.newlist[this.saveindex].data.newTable
        ).one[rowIndex]
        const _col = _row > 0 ? 1 : 0
        return {
          rowspan: _row,
          colspan: _col
        }
      }
    },
    flitterData(arr) {
      const spanOneArr = []
      let concatOne = 0
      arr.forEach((item, index) => {
        if (index === 0) {
          spanOneArr.push(1)
        } else {
          if (item.p_value === arr[index - 1].p_value) {
            // 第一列需合并相同内容的判断条件
            spanOneArr[concatOne] += 1
            spanOneArr.push(0)
          } else {
            spanOneArr.push(1)
            concatOne = index
          }
        }
      })
      return {
        one: spanOneArr
      }
    },