<script>
var workbook = new kendo.ooxml.Workbook({
  sheets: [
      {
          name: "Products",
          rows: [
              { cells: [ { value: "Product" }, { value: "Price" } ] },
              { cells: [ { value: "Laptop" }, { value: 999.99 } ] },
              { cells: [ { value: "Phone" }, { value: 599.99 } ] }
          ]
      },
      {
          name: "Summary", 
          rows: [
              { cells: [ { value: "Total Items" }, { value: 2 } ] }
          ]
      }
  ]
});

workbook.toDataURLAsync().then(function(dataURL) {
  kendo.saveAs({
    dataURI: dataURL,
    fileName: "multiple-sheets.xlsx"
  });
});
</script>