feat(datepicker): use invalid date instead of null when the date input it not empty

[saithis]

Feature Description

Set the value to invalid date instead of null, when the input is filled, but invalid. As this would be a breaking change, maybe introduce a setting to optionally enable this.

Use Case

Currently when you use a datepicker without ngModel or reactive forms the input wont get red for invalid inputs and the value is null. So you cant differenciate between empty input and something invalid. Even aria-invalid is "false".

With this feature you could solve this.

[zarend]

Hello,

It sounds like you have a need to handle empty input differently than invalid input.

Is there currently a way that can be done? What alternatives can we considered?

Best regards,

Zach

[saithis]

If you bind it to a FormControl, then you can look at the error property. But I think this wouldn't work in validators, as the error property isn't up to date in this case.

Without form binding, I don't know of any supported way to do this. You would have to call private methods and/or fields on the datepicker input to maybe get it working.