prefixOptions.template String|Function

The template for the prefix adornment of the component.

Example - specify prefix adornment template

<input id="prefix" />
<script>
  $("#prefix").kendoComboBox({
    label: "Combobox",
    dataSource: [1, 2],
    prefixOptions: {
      template: () => `${kendo.ui.icon("search")}`
    }
  })
</script>