[whatwg] [wf2] Filtering datalist with pattern

[Ian Hickson]

On Fri, 26 May 2006, Henri Sivonen wrote:
> On May 26, 2006, at 09:23, Matthew Raymond wrote:
> 
> > Henri Sivonen wrote:
> > > The WF2 spec does not say anything about filtering autocomplete lists
> > > on pattern and Opera 9 does not do it. However, autocomplete entries
> > > that would fail form validation are not particularly useful.
> > > 
> > > I suggest saying that potential autocomplete items (whether supplied
> > > by the UA itself or read from a datalist) should be tested against
> > > the datatype and the pattern of the form field being filled and
> > > should only be shown if they match both the datatype and the pattern.
> > 
> >    This assumes that the inclusion of such items is unintentional.
> 
> When the values are supplied by the UA (e.g. IRIs from the browsing 
> history), the inclusion of non-matching items certainly is unintentional 
> from the author's point of view.

Agreed.


> > What if you wanted the user to be able to select from a fixed set of 
> > values that fall outside of the pattern in addition to those that fit 
> > the pattern?
> 
> Then you'd need to change the form validation phase in the spec.

Yeah, this right now wouldn't work anyway.


> > Is the proper way to handle this to force web authors to write these 
> > values into the pattern?
> 
> Yes. (Of course, alternatively, they can remove the pattern and 
> constrain the field by scripting.)

Yup.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
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