Problem with res.send to download file?

[thearabbit]

I use XlsxPopulate to generate and download XLSX file.
In example to download with Express

router.get("/download", function (req, res, next) {
    // Open the workbook.
    XlsxPopulate.fromFileAsync("input.xlsx")
        .then(workbook => {
            // Make edits.
            workbook.sheet(0).cell("A1").value("foo");
            
            // Get the output
            return workbook.outputAsync();
        })
        .then(data => {
            // Set the output file name.
            res.attachment("output.xlsx");
            
            // Send the workbook.
            res.send(data);
        })
        .catch(next);
});

I tried in simple:json-routes, but don't work

[formspoint]

Did you get anywhere with this? I'll need to do something similar.

[thearabbit]

still have problem