[svgwg] Issue: should UA style sheet have a rule for visited link color? marked as DoC_accepted

nikosandronikos has just labeled an issue for 
https://github.com/w3c/svgwg as "DoC_accepted":

== should UA style sheet have a rule for visited link color? ==
@espadrine 
[writes](https://lists.w3.org/Archives/Public/www-svg/2016Feb/0025.html):

> The SVG 1.1 and 2 specs mention that implementations must respect 
CSS2 (resp. 2.1) pseudo-classes including :visited 
(https://www.w3.org/TR/SVG2/styling.html#RequiredCSSFeatures).
> 
> The default UA style sheet does not specify a :visited rule 
(https://www.w3.org/TR/SVG/styling.html#DefaultStyleSheetLanguage). 
There doesn't seem to be an explicit requirement not to have a 
:visited rule, even though the absence of a requirement could be 
interpreted as a hint not to do so.
> 
> Regardless, Blink has a default :visited rule (or the behavior of 
one), causing incompatibilities 
(https://code.google.com/p/chromium/issues/detail?id=352912, see also 
https://jsbin.com/nixexe/ for example). In Gecko and WebKit, `<g 
fill="#00ff00"><a xlink:href="http://google.com">Text</a></g>` will 
show as green. In Blink, it will only be green if the link has not 
been visited, black otherwise, leading to subtle bugs.
> 
> As stated on the bug report, the Blink authors justify their 
implementation with the spec's ambiguity:
> 
> > Yes, it could be argued that the UA style for <svg:a> should be 
the same as <html:a> (although that's not mandated by the spec AFAIK.)
> 
> In order to erase that ambiguity and prevent future 
incompatibilities, we should specify that default UA style rules not 
present in 6.16 should not be enforced by default by UAs.
> 
> What are your opinions?

See https://github.com/w3c/svgwg/issues/47

Received on Monday, 8 August 2016 11:10:43 UTC