css/selectors/focus-within-012.html

<!DOCTYPE html>
<html class="reftest-wait">
  <head>
    <meta charset="utf-8">
    <title>CSS Test: :focus-within selector</title>
    <link rel="author" title="Ethan Lin" href="mailto:ethlin@mozilla.com">
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
    <link rel="help" href="https://drafts.csswg.org/selectors-4/#focus-within-pseudo">
    <meta name="assert" content="Test checks :focus-within should not apply after element removed.">
    <link rel="match" href="focus-within-012-ref.html">
    <style>
      div {
        border: solid 15px green;
        outline: none;
      }
      div:focus-within {
        border-color: red;
      }
    </style>
  </head>
  <body>
    <p>Test passes if, when the element is focused and then removed, the outer element should change to green.</p>
    <div id="parent">
      <div id="child" tabindex="1"></div>
    </div>
    <script>
      var child = document.getElementById('child');
      child.focus();
      document.body.offsetWidth;
      var parent = document.getElementById("parent");
      parent.removeChild(child);
      document.body.offsetWidth;
      document.documentElement.classList.remove('reftest-wait');
    </script>
  </body>
</html>