Allow prop to determine if date is required

[jtwhittington]

Currently the inputs for the date-picker are hard-coded as being required. Would you be interested in allowing a prop to determine if the date is required or not?

Only reason I am not just making a PR - I found when not required, the inputs are filled out automatically once you enter a single value (day, month, or year) and also its basically impossible to clear the date.

I'd be happy to dig into it more.

[wojtekmaj]

Hmmm. That's a little tough indeed. I currently have no time to dig into this, but I guess it is a very needed enhancement.

I believe that onChangeExternal function would be the one to be changed in order to validate. Currently, we're running native .checkValidity() on each field (day, month, year). Changing it so that it also validates on its own whether all fields are filled in would be a good addition allowing us to change required flag via props.

That also has drawn my attention that there's no clear button... Looks like a lot of great ideas. Now let's hope this weekend will be a calm one...!

[wojtekmaj]

Hey @jtwhittington,
Version 6.4.0 just went out and you can now have fields not required. All the side effects you were writing about were elliminated. Please let me know what you think!