W3C home > Mailing lists > Public > www-style@w3.org > May 2010

Re: [css-3 colors] Transparent backgrounds

From: David Singer <singer@apple.com>
Date: Mon, 24 May 2010 09:44:18 -0700
Cc: www-style@w3.org
Message-Id: <3A29242E-0929-46B3-8A63-46D40A88E581@apple.com>
To: Alberto Lepe <dev@alepe.com>
Surely the question of what is 'behind' a transparent background is platform and UA dependent?  Photoshop, for example, gives you a checkerboard, which I doubt many would like :-(.

On May 23, 2010, at 22:48 , Alberto Lepe wrote:

> On 13 May 2010 15:22, timeless <timeless@gmail.com> wrote:
> On Thu, May 13, 2010 at 3:35 AM, Simon Fraser <smfr@me.com> wrote:
> > You really want the browser throwing up dialogs because someone used a CSS
> > rule in a web page?
> I really really don't :)
> I also agree that any message to allow/prevent background transparency may be strange for common users.
> These are some of the situations in which I think it may be problematic to allow background transparency (In which it shows your own desktop and not other web pages):
> If a 100% transparent background is used in full screen without any element could confuse the user  preventing the user to do anything until they realize its a webpage (however, usually the browser ask you if you want to open that page in full screen mode).
> An error message (simulating the OS) could be presented to the user in many fake situations. However, even without transparency it is possible to create fake alert messages (so I'm not sure if this is a valid case).
> Could someone comment other cases in which it may present a security risk or problem of using background transparency? (It could help to show if a message or setting should be specify for this matter). 

David Singer
Multimedia and Software Standards, Apple Inc.
Received on Monday, 24 May 2010 16:44:53 UTC

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