ElementUI的Table组件行合并 ,示例用官网vue3版的文档   
< el- table : data= "tableData"  : span- method= "objectSpanMethod"  border style= "width: 100%; margin-top: 20px" > < el- table- column prop= "id"  label= "ID"  width= "180"  / > < el- table- column prop= "name"  label= "姓名"  / > < el- table- column prop= "amount1"  label= "数值 1(元)"  / > < el- table- column prop= "amount2"  label= "数值 2(元)"  / > < el- table- column prop= "amount3"  label= "数值 3(元)"  / > 
< / el- table> 
export  default  { data ( )  { return  { tableData :  [ { id :  '12987122' , name :  '王小虎' , amount1 :  '234' , amount2 :  '3.2' , amount3 :  10 , } , { id :  '12987123' , name :  '王小虎' , amount1 :  '165' , amount2 :  '4.43' , amount3 :  12 , } , { id :  '12987124' , name :  '王小虎' , amount1 :  '324' , amount2 :  '1.9' , amount3 :  9 , } , { id :  '12987125' , name :  '王小虎' , amount1 :  '621' , amount2 :  '2.2' , amount3 :  17 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , { id :  '12987126' , name :  '王小虎' , amount1 :  '539' , amount2 :  '4.1' , amount3 :  15 , } , ] , spanArr :  [ 3 ,  0 ,  0 ,  2 ,  0 ,  2 ,  0 ,  1 ,  3 ,  0 ] ,  spanArr2 :  [ 2 ,  0 ,  1 ,  1 ,  1 ,  2 ,  0 ,  1 ,  1 ,  2 ] , } ; } , methods :  { objectSpanMethod ( {  row,  column,  rowIndex,  columnIndex } )  { if  ( columnIndex ===  0 )  { let  _row =  this . spanArr[ rowIndex] ; let  _col =  _row >  0  ?  1  :  0 ;  return  { rowspan :  _row, colspan :  _col, } ; } if  ( columnIndex ===  1 )  { let  _row =  this . spanArr2[ rowIndex] ; let  _col =  _row >  0  ?  1  :  0 ;  return  { rowspan :  _row, colspan :  _col, } ; } } , } , 
} ;