W3C home > Mailing lists > Public > www-validator-css@w3.org > August 2007

Re: transparency error - bug i think

From: David Dorward <david@dorward.me.uk>
Date: Thu, 30 Aug 2007 18:58:30 +0100
Message-Id: <EC31C4A5-FF7C-4927-BDD5-AD11DC792C8B@dorward.me.uk>
To: Matthew Boyd <matthew@saboyd.net>, www-validator-css@w3.org

On 30 Aug 2007, at 10:07, Matthew Boyd wrote:

> While I was trying to validate my css it came up with an error  
> regarding transparency attributes
CSS doesn't have "attributes", nor does it have a property called  
> even though I followed the example on the w3c schools website
W3 schools (who are not affiliated with the W3C) are well known for  
the dubious quality of their learning materials.
> stating how to use it at: http://www.w3schools.com/css/ 
> css_image_transparency.asp
The opacity property that page mentions appears in CSS 3 drafts and  
will pass validation should you select the CSS 3 profile (the default  
is CSS 2.1). The -moz-opacity is Mozilla's proprietary experimental  
implementation of that property. Filter is a proprietary Microsoft  
property. Neither are part of any standard so can not be valid.

David Dorward
Received on Thursday, 30 August 2007 17:59:11 UTC

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