groupTemplateString|Function
The template used to render the groups. By default the widget displays only the value of the group.
Example
<input id="customers" style="width: 400px" /> <script> $(document).ready(function() { $("#customers").kendoComboBox({ dataTextField: "ContactName", dataValueField: "CustomerID", groupTemplate: "Group: #:data#", height: 400, dataSource: { transport: { read: "https://demos.telerik.com/service/v2/core/Customers" }, group: { field: "Country" } } }); }); </script>In this article