should this work?

dabblet.css

a{
 display:block;
}
/*
 should this work?
 
 concat of an attr with a string seams to work
 if you look at the content rule in line 21
 based on the css3 spec http://www.w3.org/TR/css3-values/#attr-value
 if no type is given it's string
 in ex 3 a.img sets the type to url which would be
 equal to url(attr(href)) which neither work

 */
a.fav:after{
 display:block;
 background-image: url("http://g.etfv.co/"attr(href));
 background-repeat: no-repeat;
 text-indent: 16px;
 content: "http://g.etfv.co/" attr(href);
}


a.img:after{
 display:block;
 background-image: attr(href url);
 background-repeat: no-repeat;
 text-indent: 16px;
 content: "\0020";
}

dabblet.html

<a class="fav" href="http://google.com">1 Google</a>
<a class="fav" href="http://reddit.com">2 Reddit</a>
<a class="img" href="http://i.imgur.com/nRIGx.jpg">3 Imagelink</a>

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}