.xlsx file corrupt on download from express server but works fine on localhost server

So, I’m having this problem that whenever I’m downloading data(json) as .xlsx file its getting corrupted and unusable, this is the case when this app is deployed on heroku using express server. But when I run a local server on my machine and download the file it works just fine and data is there the way I want.

I’m using XLSX version 0.11.3 and on client side only.

Here’s the code:

downloadResData(data) {
    let ws = XLSX.utils.json_to_sheet(data);
    let wb = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(wb, ws, "data");
    let wbout = XLSX.write(wb, {bookType: 'xlsx', type: 'binary'});

    function s2ab(s) {
      let buf = new ArrayBuffer(s.length);
      let view = new Uint8Array(buf);
      for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
      return buf;
    }

    FileSaver.saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), "data.xlsx");
  }
 }

[m-ketan]

Finally, fixed the issue. The problem was with the browserify package. The version I was using was way too old, I updated it to the latest one and got rid of the corrupted downloads.

[SheetJSDev]

Copy and paste that string into your application and store it as some variable (like datajson) then hardcode downloadResData(JSON.parse(datajson)) and see if the problem shows up locally.