<script>
var workbook = new kendo.ooxml.Workbook({
  sheets: [
      {
          rows: [
              { 
                  height: 50,
                  cells: [ 
                      { value: "Top", vAlign: "top" },
                      { value: "Center", vAlign: "center" },
                      { value: "Bottom", vAlign: "bottom" }
                  ] 
              }
          ]
      }
  ]
});

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