[whatwg] Form validation against invisible controls

[TAMURA, Kent]

> > 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.

-- 
TAMURA Kent
Software Engineer, Google



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