let layout = DatePickerRange.datePickerRange
                    "my-date-picker-range"
                    [
                        DatePickerRange.Attr.isRTL true 
                        DatePickerRange.Attr.firstDayOfWeek DatePickerRange.FirstDayOfWeekType.Prop3
                        DatePickerRange.Attr.startDate  "2017-6-21"
                    ]