Download exceljs workbook from the browser

downloadSheet.ts

export const downloadSheet = (workbook: ExcelJS.Workbook) => {
  workbook.xlsx
    .writeBuffer()
    .then((buffer) => {
      // buffer --> blob
      const blob = new Blob([buffer], { type: 'application/vnd.ms-excel' });

      const link = document.createElement('a');
      link.download = 'download.xlsx';
      link.target = 'blank';

      // blob --> url
      link.href = URL.createObjectURL(blob);
      link.click();
    })
    .catch((err) => {
      throw err;
    });
};

From user2402616 @ https://stackoverflow.com/a/58969491/10561330