<!DOCTYPE html>
<html>
<head><title>SheetJS + Dojo Write Demo</title></head>
<body>
  <h1>SheetJS + Dojo Write Demo</h1>

  (this HTML page is not minified -- feel free to view source!)<br/><br/>
  <a href="https://docs.sheetjs.com">SheetJS CE Documentation</a>
<script>
dojoConfig = { packages: [
  { name: "xlsx", location: "https://cdn.sheetjs.com/xlsx-latest/package/dist", main: "xlsx.full.min" }
] };
</script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1.10.4/dojo/dojo.js" data-dojo-config="isDebug:1, async:1"></script>
<script>
require(["dojo/request/xhr", "xlsx"], function(xhr, _XLSX) {
  xhr("https://sheetjs.com/data/executive.json", {
    headers: { "X-Requested-With": null },
    handleAs: "json"
  }).then(function(raw_data) {
    /* filter for the Presidents */
    var prez = raw_data.filter(function(row) {
      return row.terms.some(function(term) { return term.type === "prez"; });
    });

    /* flatten objects */
    var rows = prez.map(function(row) { return ({
      name: row.name.first + " " + row.name.last,
      birthday: row.bio.birthday
    }); });

    /* generate worksheet and workbook */
    var worksheet = XLSX.utils.json_to_sheet(rows);
    var workbook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(workbook, worksheet, "Dates");

    /* fix headers */
    XLSX.utils.sheet_add_aoa(worksheet, [["Name", "Birthday"]], { origin: "A1" });

    /* calculate column width */
    var max_width = rows.reduce(function(w, r) { return Math.max(w, r.name.length); }, 10);
    worksheet["!cols"] = [ { wch: max_width } ];

    /* create an XLSX file and try to save to Presidents.xlsx */
    XLSX.writeFile(workbook, "Presidents.xlsx");
  });
});
</script>
</body>
</html>