Re: attr(<identifier>)

On Mon, Sep 21, 2015 at 11:48 AM, Jens Oliver Meiert <jens@meiert.com> wrote:
> (CC www-style for spec may be ambiguous)
>
> The CSS validator throws parse errors for constructs like
>
> a[href^='http']:after {
>   content: ' <' attr(href) '>';
> }
>
> (Same for “content: ' \003C' attr(href) '\003E';”—both should work
> from what I can tell.)
>
> Two of the relevant documents I checked [1,2] seem blissfully unclear
> about concatenation, however it appears (per samples like “string-set:
> author attr(author);”) that this is, indeed, valid CSS.
> Implementations (WebKit) support that notion, for the code is
> supported.
>
> Unless I’m missing something, can the validator team look into this,
> and the CSS working group clarify if necessary?
>
> Cheers,
>  Jens.
>
>
> [1] http://www.w3.org/TR/CSS21/generate.html
> [2] http://www.w3.org/TR/css3-content/

You're correct, that's definitely valid.  This is clear in the 2.1
grammar - there's a long list of string-ish things wrapped in a []+,
which indicates you can use one or more, space-separated.

I'm unsure about who maintains the validator, but I guess you hit the
right mailing list.

~TJ