vue elementui table表格动态合并单元格

	  getTableList(){
	    //获取表格数据方法在此方法返回成功数据是调用
	    this.rowspan();
	  },
      rowspan() {
        debugger;
        var that = this;
        that.spanArr = [];
        that.JRLTableData.forEach((item,index) => {
          debugger;
          if( index === 0){
              that.spanArr.push(1);
              that.position = 0;
          }else{
            if(that.JRLTableData[index].stoveId === that.JRLTableData[index-1].stoveId ){
              that.spanArr[that.position] += 1;
              that.spanArr.push(0);
            }else{
              that.spanArr.push(1);
              that.position = index;
            }
          }
        })
      },
      //在el-table中调用
      objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      //表格合并行
      debugger;
      //笨方法要合并几列就写几个
        if(columnIndex === 0){
          const _row = this.spanArr[rowIndex];
          const _col = _row>0 ? 1 : 0;
          return {
            rowspan: _row,
            colspan: _col
          }
        }
        if(columnIndex === 1){
          const _row = this.spanArr[rowIndex];
          const _col = _row>0 ? 1 : 0;
          return {
            rowspan: _row,
            colspan: _col
          }
        }
        if(columnIndex === 2){
          const _row = this.spanArr[rowIndex];
          const _col = _row>0 ? 1 : 0;
          return {
            rowspan: _row,
            colspan: _col
          }
        }
        if(columnIndex === 3){
          const _row = this.spanArr[rowIndex];
          const _col = _row>0 ? 1 : 0;
          return {
            rowspan: _row,
            colspan: _col
          }
        }
        if(columnIndex === 4){
          const _row = this.spanArr[rowIndex];
          const _col = _row>0 ? 1 : 0;
          return {
            rowspan: _row,
            colspan: _col
          }
        }
      },