How to prevent scroll when calling Datepicker?

Question

JavaScript

Good evening.
I can't fix the bug... Can you help?)
pie.mooobs.com/basket
When focusing on the "Date" field, the jq ui datepicker calendar appears. In safari on iphone, when you call the calendar, the site scrolls down the form.
How can this be prevented?

I hung a function on the field to prohibit calling the keyboard. But it's not that..

$(".date").focus(function () {
  $(this).blur();
});