css/selectors/invalidation/lang-pseudo-class-in-has-document-element.html

<!DOCTYPE html>
<html class="reftest-wait">
<head>
    <link rel="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org"/>
    <link rel="help" href="https://drafts.csswg.org/selectors/#relational">
    <link rel="help" href="https://drafts.csswg.org/selectors/#lang-pseudo">
    <link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
    <meta http-equiv="content-language" content="fr">
</head>
<body>
    <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
    <div><span></span></div>
    <style>
        div { width: 100px; height: 100px; }
        div:has(*:lang(fr)) { background: red; }
        div:has(*:lang(en)) { background: green; }
    </style>
    <script>
        requestAnimationFrame(() => {
            setTimeout(() => {
                document.documentElement.lang = 'en';
                document.documentElement.className = '';
            }, 0);
        });
    </script>
</body>
</html>