[whatwg] Selectors within <style scoped>
lachlan.hunt at lachy.id.au
Fri Jun 17 04:46:48 PDT 2011
On 2011-06-17 09:36, Roland Steiner wrote:
> On Fri, Jun 17, 2011 at 4:10 PM, Roland Steiner<rolandsteiner at google.com>wrote:
>> http://dev.w3.org/2006/webapi/selectors-api2/#the-scope-pseudo-class says:
>> The :scope<http://dev.w3.org/2006/webapi/selectors-api2/#scope>
>> pseudo-class *must* match any element that is a contextual reference
>> so :scope is ambiguous if you have several scoping elements as ancestors.
>> :scope in a nested sheet, meant to limit the rule to the nested scoping
>> element, may instead match against an enclosing scoping element. Again, see
>> the example I mailed earlier.
> Actually, re-reading that section I think I misunderstood the meaning. If
> only the direct parent of a<style scoped> is considered a contextual
> reference element for rules in _that_ style-sheet (rather than an element
> being a contextual reference element for _some_ scoped stylesheet), there is
> no ambiguity.
That is correct. However, note that the definition of :scope itself does
not define which elements are the contextual reference elements (except
where it defaults to the document root element) and it can it theory
support more than one . But it is up to the specification defining a
particular context to define what the contextual reference elements are,
and HTML5 needs to define that the contextual reference element for a
given scoped stylesheet is its parent element.
 In fact, the refNodes parameter of the querySelector* methods
explicitly allows there to be more than one in that context.
Lachlan Hunt - Opera Software
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