W3C home > Mailing lists > Public > www-style@w3.org > July 2008

Re: Additional value for the visibility property

From: David Hyatt <hyatt@apple.com>
Date: Wed, 09 Jul 2008 16:53:46 -0500
To: Andrew Fedoniouk <news@terrainformatica.com>
Cc: robert@ocallahan.org, "Ph. Wittenbergh" <jk7r-obt@asahi-net.or.jp>, W3C Style List <www-style@w3.org>
Message-id: <8C79D198-100A-4982-B6EC-925A8F0923E1@apple.com>

On Jul 9, 2008, at 4:43 PM, Andrew Fedoniouk wrote:

> David Hyatt wrote:
>> On Jul 9, 2008, at 3:53 PM, Andrew Fedoniouk wrote:
>>> In fact it should be rendered as this:
>>> http://terrainformatica.com/w3/opacity-probe-rendering.png
>>> as opacity is not inherited by default (so div.kid is not  
>>> transparent).
>> We cannot change this.  I do not understand why you are just  
>> bringing this up now.   The vendor prefixes were dropped from  
>> opacity ages ago.  It's done.
> What specification was used for implementing this? That is a point.
> I doubt that any existing designs rely on the fact that opacity  
> establishes new stacking context. So you can change this.

opacity is used heavily in OS X, both in Dashboard widgets and in apps  
that use WebKit.  It has been deployed for years.   Even if we could  
change it, I don't think we should, since I think having opacity  
follow the document tree is much more natural than having it follow  
the containing block hierarchy.

Received on Wednesday, 9 July 2008 21:54:28 UTC

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