<div id="fileManager"></div>
<script>
    var baseUrl = "https://demos.telerik.com/service/v2/core/filemanager/";

    $("#fileManager").kendoFileManager({
        toolbar: {
            open: function(e) {
                console.log("Toolbar popup opened");
            }
        },
        dataSource: {
            transport: {
                read: {
                    method: "POST",
                    url: baseUrl + "Read"
                }
            }
        }
    });
</script>