css magicks!

magicks.css

/* flag links that don't go anywhere */

a[href = ""] {
  background: red;
  color: white;
  font-size: x-large;
}

/* flag absolute links */

a[href ^= http] {
  display: inline-block;
  color: red;
  transform: rotate(180deg);
}

/* flag external links */

a[href ^= 'http']:not([href *= 'html5rocks.']) {
  background: transparent url(data:image/png;base64,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) no-repeat center right;
  padding-right: 16px;
}​

/* invert all PNGs */

img[src $= .png] {
  filter: invert(100%);
}

/* see the head */

head {
  display: block;
  border-bottom: 5px solid red;
}
script, style, link {
  display: block;
  white-space: pre;
  font-family: monospace;
}

/* wrap tags */

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>";
}

link:before {
  content: "<link rel=\"" attr(rel) "\" type=\"" attr(type) "\" href=\"" attr(href) "\" />";
}