[whatwg] Form validation against invisible controls

TAMURA, Kent tkent at chromium.org
Sun Jun 13 22:16:33 PDT 2010

There are some objections against omitting invisible controls from form
validation. However, it is a real issue with existing sites and users can't
submit such forms at all though they can submit it with non-HTML5 browsers.

My conclusion is it's better to disable interactive form validation for
existing sites as possible. e.g. disabling interactive form validation for
documents without "<!DOCTYPE html>".

On Fri, Jun 4, 2010 at 00:16, TAMURA, Kent <tkent at chromium.org> wrote:

> > An element is a "candidate for constraint validation" if
>> > 1. it is a validatable type,
>> >    e.g. true if <input type=number>, false if <input type=reset>
>> > 2. has no "disabled" attribute,
>> > 3. has no "readonly" attribute,
>> > 4. inside of a <form> element,
>> > 5. has non-empty "name" attribute, and
>> > 6. not inside of a <datalist> element.
>> >
>> > I hope ValidityState and the pseudo classes ignores 2-6.

>> The pseudo-classes do not ignore 2, 3, and 6. (4 and 5 are now removed.)

> I'd like to propose to add another condition:
>   7. it is visible (computed 'display' property of CSS isn't 'none' and no
> 'hidden' content attribute)

> I couldn't find exceptional rules for validating invisible controls in the
> current draft.
> Chrome 5 was released with a part of interactive validation, and we
> received a bug report about validation against invisible form controls.

> --
> Software Engineer, Google

Software Engineer, Google

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