custom action button not working

[ranjeet-navsoft]

custom action button not working . i am using this but buttons are not showing can anyone help me out.

          <ngx-mat-datepicker-actions>
          <button mat-button ngxMatDatepickerCancel>Cancel</button>
          <button mat-raised-button color="primary" ngxMatDatepickerApply [color]="color">Apply</button>
        </ngx-mat-datepicker-actions>