A date field (datepicker) is a special input field with a widget for selecting a date.
If the date field is required, use the required parameter.
The range is configured with two separate pairs of bindings, and both are needed:
minDate / maxDate on <kbq-datepicker> restrict the calendar — out-of-range days are
not selectable.min / max on the <input> drive validation, including dates typed with the keyboard or
pasted. A value outside the range is still written to the form control, and the control is
marked invalid with kbqDatepickerMin or kbqDatepickerMax.Validation requires a form control on the input (ngModel, formControl or formControlName) —
without one the validators never run.
min and max are compared with the time part included rather than by calendar day, because the
input keeps the time of the value it parses. Set the lower bound to the start of the first allowed
day and the upper bound to the end of the last allowed day, so that both boundary days stay valid.
There is no dedicated date range widget, so use separate input fields to specify the boundaries.