[FEATURE] Add onInvalid action to form.

[Serabe]

Add onInvalid action, invoked when trying to submit an invalid form.

[Serabe]

Not sure why the build failed given the test passed :$

[miguelcobain]

Very weird. I can merge this because it's clearly not related.

Regarding the PR, I love the idea, but I'm unsure about the naming.
onInvalid sounds like an action that is sent when the form becomes invalid, which is not the case.

What if we kept using onSubmit but we sent the validity of the form in the action?
People could then later treat the submit accordingly in their action.

Using your approach, I think we should rename the action. Perhaps onSubmitInvalid?

Let me know your thoughts. Thanks for the PR.

[Serabe]

I would like to use invalid as the name of the event because that is the standard name according to MDN. If you don't like that option, onSubmitInvalid looks good too.

[miguelcobain]

I was unaware of that event.
Makes sense to name this action accordingly since they attempt to do the same thing.
Thanks again!

[Serabe]

Thanks!

[Serabe]

@miguelcobain is there any planned release that includes this PR?

Thanks!

[miguelcobain]

@Serabe v1.0.0-beta.4 was published with this PR. Sorry for the delay.

[Serabe]

Thanks!