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RE: [selectors4] feedback

From: François REMY <francois.remy.dev@outlook.com>
Date: Mon, 9 Dec 2013 18:05:44 +0100
Message-ID: <DUB407-EAS412B6EE34B5CB65FBFF9DE5A5D30@phx.gbl>
To: "'Gavin Engel'" <gavin@engel.com>, "'Simon Sapin'" <simon.sapin@kozea.fr>
CC: <www-style@w3.org>
I didn’t participate to the /for/ discussion so this was maybe ruled out on purpose, but do you think using a pseudo-class instead would be clearer?

      .foo:href-by(for, label:hover) > input


      .foo > input:href-by(for, label:hover)

De : gavinengel@gmail.com [mailto:gavinengel@gmail.com] De la part de Gavin Engel
Envoyé : dimanche 8 décembre 2013 20:21
À : Undisclosed.Recipients:
Cc : www-style@w3.org
Objet : Re: [selectors4] feedback

Oh, thanks for clarifying things for me.  After reflection, I was mostly wondering how references could help reduce javascript code which modify styles, like the jQuery .css() method.  Since references enable selecting elements all over the document--not just child elements--this would slightly reduce the need for javascript to modify style on user interaction.

I'm not quite sure if that goal is really in line with the path of css development. I'm really speaking on my behalf when I say I would find that very a useful feature.  So, this is why I suggested allowing not just id, but to allow the attribute value as a kind of variable to be used in the second complex selector for a tiny bit more flexibility.   

>  Can we make the spec clearer?

I imagine I'm thinking too far beyond what is actually intended by the proposal, which is why it was unclear to me.  I tend to think how I can reduce various javascript in favor of more structured css, which is why this proposal got my attention.  For the simpler function of simply selecting the mate of an element by id, it is perfectly clear.

On Fri, Dec 6, 2013 at 2:44 PM, Simon Sapin <simon.sapin@exyr.org> wrote:
On 06/12/2013 08:59, Gavin Engel wrote:
2. It is somewhat non-intuitive as to where the reference (/for/)
applies to the second selector (/input/).  If we use a more complex

example we can see this more clearly:

    label:matches(:hover, :focus) /for/ .foo input { }
Does the/for/'s id apply to the .foo or to the input?

It applies to .foo

Combinators always describe the relationship between the two "compound selectors" they are in-between, nothing further.


I imagine it is
meant to always apply to the /final/ simple selector (/input/), even

though reading from left-to-right the /for/ is next to .foo.  This makes
it somewhat non-intuitive.  It also removes the /possibility/ of
attaching the id to the first simple selector (/.foo/).

Why did you imagine that, if you also find it non-intuitive? Can we make the spec clearer?

Simon Sapin
Received on Monday, 9 December 2013 17:06:22 UTC

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