[whatwg] <output> should not be barred from constraint validation

[Mounir Lamouri]

On 07/20/2010 06:00 PM, Tab Atkins Jr. wrote:
> On Tue, Jul 20, 2010 at 6:37 AM, Mounir Lamouri
> <mounir.lamouri at gmail.com> wrote:
>> Hi,
>>
>> At the moment, three form elements are barred from constraint
>> validation: object, fieldset and output. I can understand why object and
>> fieldset are barred from constraint validation but I think output could
>> use the constraint validation.
>>
>> Indeed, it could be nice to be able to use setCustomValidity() on
>> <output>. IMHO, it is part of the use case of <output>: this element
>> should represent the result of a calculation and we may want to do a
>> validation check on this result.
>> For example, we could imagine a web application to choose courses in an
>> university and you have to select between 12 and 18 credits. <output> is
>> the best way to represent the total credits used and it would be easy to
>> make it invalid when the sum is not correct.
> 
> I think that's actually pretty interesting.  I might be able to get behind this.
> 
> ~TJ

I realize that requires to change 4.10.20.2, more specifically
"statically validate the constraints" to not only consider submittable
elements but all listed elements.

--
Mounir