chromium/third_party/blink/web_tests/external/wpt/css/selectors/focus-within-001-ref.html

<!DOCTYPE html>
<html lang=en>
<meta charset="utf-8">
<title>Selectors Level 4: focus-within Reference File</title>
<link rel="author" title="Keyong Li" href="mailto:[email protected]">
<link rel="author" title="Florian Rivoal" href="mailto:[email protected]">
<style>
div {
  border: solid 15px green;
}
</style>
<p>Test passes if, when the element below is focused,
it is surrounded by a thick green border.
There must be no red or blue once it is focused.</p>
<div>Focus this element</div>
</html>