[whatwg] HTML 5 clarifications on ValidityState?

Ian Hickson ian at hixie.ch
Mon Aug 31 02:04:11 PDT 2009

On Tue, 25 Aug 2009, Alex Vincent wrote:
> I read this paragraph (from section as self-contradicting:
> "The validationMessage  attribute must return the empty string if the
> element is not a candidate for constraint validation or if it is one
> but it satisfies its constraints; otherwise, it must return a suitably
> localized message that the user agent would show the user if this were
> the only form with a validity constraint problem. If the element is
> suffering from a custom error, then the custom validity error message
> should be present in the return value."
> Specifically, the last sentence contradicts the rest of the paragraph.
>  If there is a custom error, but the element is not a candidate for
> constraint validation, should the validationMessage attribute be
> empty, or should the custom validity error message be present in the
> return value?  You can't have both.


> Also, I noticed the readonly attribute for input elements overrides 
> constraint validation, per section - but the readonly 
> attribute has no meaning for several input types (section 4.10.4, the 
> big table after the IDL).  For checkboxes, radio buttons, file uploads, 
> image inputs, submit, reset and ordinary button types for the input 
> element, readonly has no other effect.
> Please advise - I'm currently working on a patch for Gecko code which 
> implements this.

If the attribute doesn't apply, the text in that section is irrelevant.

Does that help?

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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