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Re: Selectors Tests

From: L. David Baron <dbaron@dbaron.org>
Date: Wed, 29 Oct 2008 21:47:46 -0700
To: Brad Kemper <brkemper.comcast@gmail.com>
Cc: Boris Zbarsky <bzbarsky@MIT.EDU>, Lachlan Hunt <lachlan.hunt@lachy.id.au>, fantasai <fantasai.lists@inkedblade.net>, www-style <www-style@w3.org>
Message-ID: <20081030044746.GA10745@pickering.dbaron.org>

On Wednesday 2008-10-29 21:36 -0700, Brad Kemper wrote:
> On Oct 29, 2008, at 2:41 PM, Boris Zbarsky wrote:
>> Lachlan Hunt wrote:
>>>  Most elements will be neither enabled nor disabled. An element is
>>>  enabled if the user can either activate it or transfer the focus to
>>>  it. An element is disabled if it could be enabled, but the user  
>>> cannot
>>>  presently activate it or transfer focus to it.
>>
>> So should an <input type="text" style="display: none"> match :disabled, 
>> by that reasoning?
>
> Is that a purely philosophical question, or does it matter somehow?  
> Given that it is not rendered and takes up no space, and that it will  
> not be disabled if display changes to something other than "none", then 
> matching or not would seem to make little or no difference.

I think Boris's point is that the definition has to be written such
that the value of CSS properties has no influence on whether
selectors match.  At least I hope that was his point.

(The definition of which elements should match :disabled could
perhaps be left to the underlying markup language.  However,
Lachlan's definition clearly allows too many factors to influence
that matching.)

Whether an element is display:none absolutely cannot change whether
it matches disabled; otherwise we'd have big problems with
  :disabled { display: inline ! important; }

-David

-- 
L. David Baron                                 http://dbaron.org/
Mozilla Corporation                       http://www.mozilla.com/
Received on Thursday, 30 October 2008 04:48:52 GMT

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