The amazing powers of CSS
Yesterday at the office, we were coming up with strange and magical CSS tricks. Take this one for instance, it makes empty links very visible:
a[href = ""] {
background: red;
color: white;
font-size: x-large;
}Check out the live example at jsFiddle
You can also style absolute links differently from relative links:
a[href ^= http] {
display: inline-block;
color: red;
transform: rotate(180deg);
}Check out the live example at jsFiddle
If you want to have a different style for links pointing out of your domain, you can use the :not() selector. This is actually how we do the little arrows next to external links at HTML5Rocks.
a[href ^= 'http']:not([href *= 'html5rocks.']) {
background: transparent url(arrow.png) no-repeat center right;
padding-right: 16px;
}Check out the live example at jsFiddle
Just to remind you that you're not limited to styling links, here's how to make all PNG images inverted:
img[src $= .png] {
filter: invert(100%);
}Moving on from attribute selectors, did you know that you can make the document head visible, along with the other elements there?
head {
display: block;
border-bottom: 5px solid red;
}
script, style, link {
display: block;
white-space: pre;
font-family: monospace;
}Or that you can use the awesome power of CSS attr-function to fill in the :after and :before content?
script:before {
content: "<script src=\"" attr(src) "\" type=\"" attr(type) "\">";
}
script:after {
content: "</script>";
}
style:before {
content: "<style type=\"" attr(type) "\">";
}
style:after {
content: "< /style>";
}
/* And for a finish, <link> */
link:before {
content: "<link rel=\"" attr(rel) "\" type=\"" attr(type) "\" href=\"" attr(href) "\" />";
}Check out the live example at jsFiddle
Note that attr() reads in the attribute values of the matching element, so if you use it for #foo:before, it reads the attributes from #foo.