row/column merge
Set the attribute span-method to specify the algorithm for merging rows or columns.
The method parameter is 4 objects:
row : the current row
column : the current column
rowIndex : current row index
columnIndex : current column index
This function can return an array containing two elements, the first element represents the rowspan, and the second element represents the colspan. Can also return an object with keys rowspan and colspan.
The official document does not explain rowspan, colspan
Here are the details:
rowspan=0 hides the row
rowspan=1 show the row
If rowspan is greater than 1, it represents the number of merged rows
Colspan is the same as rowspan and replaced by columns
Merge order is row: left to right column: top to bottom