Issue on export data

mdellanave83

Hi,
I noticed that the format.header function is triggered two times for one export action: the first time it's ok, but the second round the function the function is called even on the columns that are not declared in the columns options

In a table of a total of 6 columns, with the following export options for example, the function will be called 9 times, the first round for the 3 columns declared in the exportOptions.columns index array, the second round for all the 6 columns.

exportOptions: {
  columns: [3,4,5],
  format: {
    header: (data, columnIndex, columnElement) => {
      //
    }
  }
}

In the previuos version only the first round of calls was executed.

Next week I'll try to prepare a sandbox to show the problem.

allan

Hi,

Yes, a test case showing the issue would be great.

Thank you,
Allan

mdellanave83

Hi @allan
here the modified sandbox to show you the 2 rounds of export.

If you click the PDF export button, you'll see in the console the column index print

Because of the exportOptions.columns = [2,3,4,5] I was expecting to see only those

mdellanave83

Probably is something related also to this discussion
https://datatables.net/forums/discussion/78539/dt2-0-and-excel-btn-3-0-1-columns-rearrange-with-headers-not-working

allan

Almost certainly related. I'll try to look into that soon.

Allan