el-table实现静态和动态合并单元格 以及内容显示的问题

实现效果图

  
        
          
            
          
        
        
          
            
          
          
            
          
          
            
          
        
        (
            item, index
          ) in projectBreakUpCpmmandList.projectBreakUpCpmmandList"
          :key="index"
          :label="item.months + '月'"
          align="center"
          show-overflow-tooltip
        >
          
            
          
          
            
          
          
            
          
          
            
          
        
      

// 数据请求

getprojectbreakup(filteredFormInline).then((res) => {
        console.log(res);
        this.loading = false;
        if (res.data.length !== 0) {
          this.tableData = res.data;
          this.projectBreakUpCpmmandList = res.data[0];
        } else {
          this.tableData = [];
          this.projectBreakUpCpmmandList = [];
        }
});