columns.filterable.search Boolean (default: false)

Controls whether to show a search box when checkbox filtering is enabled.

Example - Enable checkbox filter search

<div id="grid"></div>
<script>
    $("#grid").kendoGrid({
        columns: [{
            field: "country",
            filterable: {
                multi: true,
                search: true
            }
        }],
        filterable: true,
        dataSource: [{ country: "BG" }, { country: "USA" }]
    });
</script>