sheets.rows.cells.underline Boolean (default: false)

Setting sheets.rows.cells.underline to true underlines the cell content.

Example - making the cell content underlined

<script>
var workbook = new kendo.ooxml.Workbook({
  sheets: [
      {
          rows: [
            { cells: [ { value: "Uderline", underline: true } ] }
          ]
      }
  ]
});
workbook.toDataURLAsync().then(function(dataURL) {
  kendo.saveAs({
    dataURI: dataURL,
    fileName: "Test.xlsx"
  });
});
</script>