<div id="grid"></div>
<script>
$("#grid").kendoGrid({
  columns: [
    { field: "productName" },
    { field: "category" }
  ],
  dataSource: [
    { productName: "Tea", category: "Beverages" },
    { productName: "Coffee", category: "Beverages" }
  ],
  groupable: true,
  contextMenu: {
    groups: [
      {
        text: "Group Operations",
        items: [
          {
            text: "Expand All",
            command: "ExpandAllCommand"
          }
        ]
      }
    ]
  }
});
</script>