css/selectors/focus-within-010.html

<!DOCTYPE html>
<html lang=en class="reftest-wait">
<meta charset="utf-8">
<title>Selectors Level 4: focus-within</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://drafts.csswg.org/selectors-4/#focus-within-pseudo">
<link rel="match" href="focus-within-shadow-001-ref.html">
<meta name="assert" content="Checks that :focus-within is still applied when focus moves from an element to one of its descendants.">
<style>
/* Suppress things that cannot be reproduced in the reference file */
:focus {
  outline: none;
}

#target {
  display: none;
}

#wrapper:focus-within > #target {
  display: block;
}

#target:focus {
  border: solid 15px green;
}
</style>
<p>Test passes if there is a green rectangle below.</p>
<div id="wrapper" tabindex="1">
  <div id="target" tabindex="2"></div>
</div>
<script>
var wrapper = document.getElementById('wrapper');
wrapper.focus();
var target = document.getElementById('target');
target.focus();
document.documentElement.classList.remove('reftest-wait');
</script>
</html>