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Re: [selectors-api] Handling :link and :visited Pseudo Classes

From: Stewart Brodie <stewart.brodie@antplc.com>
Date: Wed, 16 Apr 2008 13:57:00 +0100
To: public-webapi@w3.org
Message-ID: <fc2ea48bd9b3c6ef108390ae58aff188cc40f04b@localhost>

Lachlan Hunt <lachlan.hunt@lachy.id.au> wrote:

> Hi,
>    The current Selectors API draft states:
>    "... user agents may treat all links as unvisited links, or implement
>     other measures to preserve the user’s privacy."
> I'm considering adjusting the spec to allow just two options, and making 
> IE8's behaviour non-conforming.
> Either:
> 1. Match unvisited and visted links normally with :link and :visited, 
> respecitively.
> 2. Match all links with :link, and no links with :visted (i.e. treat all 
> links as unvisited)
> Feedback from implementers on this issue, particularly from Microsoft, 
> would be appreciated.

Option 2 is what I do - primarily because there is usually no global history
available with which to evaluate the "visitedness" of links anyway (the
history is a configurable option that I don't believe any of our users ever

> Another option would be to effectively treat :link and :visited as
> synonymous and match all links with both, but I'm not so comfortable with
> that.

I don't think that you can do that safely, as it changes the specification -
specifically, it removes the guarantee that something can never match both
the :visited and :link psuedos at the same, which could break existing
content in subtle ways.

Stewart Brodie
Software Engineer
ANT Software Limited
Received on Wednesday, 16 April 2008 12:57:46 UTC

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