Export to .zip instead of .xlsx?

[tqdo]

Hi, just wondering whether there is a way to export to a .zip file instead of .xlsx? Thanks

[Eric P Sheets]

"Export to ZIP" is not really well defined. Excel / Google Sheets / Numbers don't have a canonical ZIP export.

If you wanted to export every worksheet as CSV in a ZIP container, this is doable with the embedded CFB dependency:

var zip = XLSX.CFB.utils.cfb_new()
wb.SheetNames.forEach((name,idx) => {
  var csv = XLSX.utils.sheet_to_csv(wb.Sheets[name]);
  XLSX.CFB.utils.cfb_add(zip, `sheet${idx+1}.csv`, new TextEncoder().encode(csv));
});
var data = XLSX.CFB.write(zip, {fileType: "zip"});

In NodeJS, that generates a Buffer which you can write to file with fs.writeFileSync. In the browser, that generates a Uint8Array which you can download using the standard HTML5 download technique.

Note: XLSX/XLSB/ODS/Numbers are supported export formats that ultimately use a ZIP container.