CSS :local-link

The :local-link pseudo-class was proposed to match links that point to the current URL or local resource. It is not broadly supported in browsers.

Syntax

a:local-link {
  font-weight: 700;
}

Reliable alternative

a[aria-current="page"] {
  font-weight: 700;
  color: #2563eb;
}
Result:

Important note

Use aria-current="page" or an active class for reliable current-link styling.