placeholder String(default: "")

The hint displayed by the widget when it is empty. Not set by default.

Example - specify placeholder option

<input id="dropdowntree" />

<script>
    $("#dropdowntree").kendoDropDownTree({
        dataSource: [{ text: "item1", value: 1 }, { text: "item2", value: 2 }],
        placeholder: "Select..."
    });
</script>