valuePrimitive Boolean(default: false)

Specifies the value binding behavior for the widget when the initial model value is null. If set to true, the View-Model field will be updated with the selected item value field. If set to false, the View-Model field will be updated with the selected item.

Example - specify that the View-Model field should be updated with the selected item value

<input id="combobox" data-bind="value: selectedProductId, source: products" />

<script>
$("#combobox").kendoComboBox({
  valuePrimitive: true,
  dataTextField: "name",
  dataValueField: "id"
});
var viewModel = kendo.observable({
  selectedProductId: null,
  products: [
    { id: 1, name: "Coffee" },
    { id: 2, name: "Tea" },
    { id: 3, name: "Juice" }
  ]
});

kendo.bind($("#combobox"), viewModel);
</script>