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[css3-ui] Negative values in outline-offset?

From: Lea Verou <leaverou@gmail.com>
Date: Mon, 02 May 2011 13:48:51 +0300
Message-ID: <4DBE8C13.5030204@gmail.com>
To: www-style@w3.org
I've been researching this for a while, but I can't find a definite answer.

The CSS3 UI spec says:
> By default, the outline is drawn starting just outside the border 
> edge. However, it is possible to offset the outline and draw it beyond 
> the border edge.
> Name:    outline-offset
> Value: <length> | inherit
> Initial:    0
> Applies to:    all elements
> Inherited:    no
> Percentages:    N/A
> Media:    visual
> Computed value: <length> value in absolute units (px or physical).
> If the computed value of 'outline-offset' is anything other than 0, 
> then the outline is outset from the border edge by that amount.
From: http://www.w3.org/TR/css3-ui/#outline-offset

Negative <length>s are neither explicitly permitted, nor explicitly 
allowed in the property definition. Webkit and Gecko support negative 
values in it, but Opera does not (IE doesn't support outline-offset in 
general, so I can't test. Not sure whether they did support it in IE10). 
Testcase: http://jsfiddle.net/leaverou/2DEAb/

Thanks in advance.

Lea Verou (http://leaverou.me | @LeaVerou)
Received on Monday, 2 May 2011 10:49:22 UTC

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