The :local-link pseudo-class

The :local-link pseudo-class targets links that point to the same domain as the current page is on.

• :local-link matches any link that goes to this domain.
• :local-link(0) matches any link that goes to quirksmode.org/ (until the first slash)
• :local-link(1) matches any link that goes to quirksmode.org/css/ (until the second slash)
• :local-link(2) matches any link that goes to quirksmode.org/css/selectors/ (until the third slash)
• etc.

• External link.
• To the homepage - absolute (same domain).
• To the homepage - relative (same domain).
• To the CSS homepage (same domain plus first path part)
• To the selector homepage (same domain plus first two path parts)

:local-link {text-decoration: overline}
:local-link(0) {color: green}
:local-link(1) {text-transform: uppercase}