Datepicker | onDateChange | There should be a way to identify if the user enters an invalid date manually

[WebDevRaj]

Summary

Currently if the user enters any invalid date manually (out of the defined range) in the input, there is no way to identify the value as the onDateChange method gives us undefined in this case which is same as empty value. So we are unable to handle form validations as invalid value is treated as empty value.

Basic example

There should be a way to differentiate empty values with invalid values in the onDateChange method

Motivation

Handle invalid values in form validation, show specific user friendly errors and disable/enable submit button accordingly