css/css-cascade/scope-implicit-external.html

<!DOCTYPE html>
<html>
  <head>
    <title>@scope - implicit scope root (external sheet)</title>
    <link rel="help" href="https://drafts.csswg.org/css-cascade-6/#scope-atrule">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>
  <body>
    <div class="a outside"><div>
    <div id=root>
      <link rel="stylesheet" href="resources/scope.css">
      <div class=a></div>
    </div>
    <div class="a outside"><div>

    <script>
      test((t) => {
        assert_equals(getComputedStyle(root).zIndex, '1');
        assert_equals(getComputedStyle(document.querySelector('#root > .a')).zIndex, '2');

        let outside = document.querySelectorAll('.outside');
        assert_equals(outside.length, 2);
        for (let div of outside) {
          assert_equals(getComputedStyle(div).zIndex, 'auto');
        }
      }, '@scope with external stylesheet');
    </script>
  </body>
</html>