prefixOptions.template String|Function

The template for the prefix adornment of the component.

Example - specify prefix adornment template

<input id="maskedtextbox" />
<script>
    $("#maskedtextbox").kendoMaskedTextBox({
        mask: "000000",
        prefixOptions: {
            template: () => `${kendo.ui.icon("search")}`
        }
    })
</script>