NaN value produce an invalid document

Writing a NaN produce an error while opening the document.

To reproduce

xlsxPopulate.fromBlankAsync()
  .then(workbook => {
    const sheet = workbook.activeSheet().name('test');

    sheet.cell(1, 1)
        .style('numberFormat', '0.00')
        .value(NaN);

    return workbook.outputAsync().then(blob => {
      if (window.navigator && window.navigator.msSaveOrOpenBlob) {
        window.navigator.msSaveOrOpenBlob(blob, 'out.xlsx');
      } else {
        const url = window.URL.createObjectURL(blob);
        const a = document.createElement('a');
        document.body.appendChild(a);
        a.href = url;
        a.download = 'out.xlsx';
        a.click();
        window.URL.revokeObjectURL(url);
        document.body.removeChild(a);
      }
    });

[mbrevda]

Just came across this, too. In this case, it would seem that writing nothing would be preferable, as that’s what was there before xml-populate parsed the file:

[dtjohnson]

I don’t like the idea of writing a “NaN” string. Setting to #NUM? or throwing an exception are the only options that make sense to me. I’m open to arguments for one or the other…