How to set DatePicker so that when it get focus it doesn't show Calendar Window?

How to set DatePicker so that when it get focus it doesn't show Calendar Window?

Hello,
I have tried both jQuery UI DatePicker and Bootstarp-DateTimePicker so, that when they get focus e.g. using TAB-key their Calendar window is NOT shown. Only click to DatePicker or DateTimePicker should open Calendar Window.

How should I implement this?

Thanks,

Michael