Q: How to specify the longDateFormat.L on a isValid() check?

[karlkras]

so according to the documentation you can do this:
moment('02/22/2019', 'MM/DD/YYYY', true).isValid();
and this works just fine...

However,
what I'd rather prefer to be able to do is:

moment('02/22/2019', 'L', true).isValid();

Or use some localizable method that doesn't include having to hardcode the format like this.

[marwahaha]

Thanks for opening this request.
This is a great question for Stack Overflow.