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Re: Increasing specificity through pseudo-class repetition

From: fantasai <fantasai.lists@inkedblade.net>
Date: Tue, 20 Oct 2009 17:05:48 -0700
Message-ID: <4ADE505C.4020903@inkedblade.net>
To: Sylvain Galineau <sylvaing@microsoft.com>
CC: "www-style@w3.org" <www-style@w3.org>
Sylvain Galineau wrote:
> Should repeated instances of a pseudo-class be ignored by the parser ?
> Or do they increase the selector's specificity ? (See testcase below).
> 
> The interoperable behavior today is the latter: Opera, Firefox and Safari
> all increase the selector's specificity. IE ignores the repeats and gives
> E:first-child the same specificity as E:first-child:first-child. Given
> that a) no such exceptions are noted in the spec and b) the author has
> explicitly repeated the pseudo-class, I expect this to be a bug for IE.
> I was wondering if this was originally intended, and whether/when it was
> used in practice.

As agreed, I've added a note to the Specificity section
   http://dev.w3.org/csswg/selectors3/#specificity

   # Note: Repeated occurrances of the same simple selector are allowed
   # and do increase specificity.

Please let me know if this adequately clarifies the spec.

~fantasai
Received on Wednesday, 21 October 2009 00:06:28 GMT

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