Can't grab an event in date type field

I’m on 7.10 with default theme. I have a ‘type’ => ‘date’ field in quickcreatedefs.php. There is a custom dropdown injected into QuickCreate form with custom SubpanelQuickCreate view. Dropdown must be disabled until date is chosen. After date was chosen dropdown should be un-disabled and populated from custom entrypoint with XHR based on selected date. OK! As I thought it would be enough to add something like:

document.getElementById('check_in_date').addEventListener('input', function(){console.log('hi')});

But it looks like there are no any emitting events on choosing the date in datepicker. I tried monitorEvents() in Chrome Dev tools. And it can grab any mouseover, etc. events. But no ‘input’ event at all on choosing the date. I examine calendar icon’s events and found out that it’s a ‘blur’ event that inserts date value into date field. But at the event firing moment date field keeps only old value. Thus only old (or empty) value can be grabber from date input.

Any ideas how to grab chosen date value from date type field?