<!DOCTYPE html>
<html>
<head>
<link rel="help" href="https://drafts.csswg.org/selectors/#lang-pseudo">
<link rel="match" href="lang-pseudo-class-across-shadow-boundaries-ref.html">
</head>
<body>
<p>Test passes if you see a single 100px by 100px green box below.</p>
<style>
#testCases div { width: 100px; height: 25px; }
#host1:lang(zh) { background: green; }
#host3 > :lang(ja) { background: green; }
#host4 > div { background: red; }
</style>
<div id="testCases">
<div id="host1" lang="zh"><div></div></div>
<div id="host2" lang="de"><div></div></div>
<div id="host3" lang="ja"><div></div></div>
<div id="host4"><div></div></div>
</div>
<script>
host1.attachShadow({mode: 'closed'}).innerHTML = '<slot></slot>';
host2.attachShadow({mode: 'closed'}).innerHTML = '<style> div { width: 100px; height: 25px; background: red; } div:lang(de) { background: green; } </style><div></div>';
host3.attachShadow({mode: 'closed'}).innerHTML = '<slot lang="en"></slot>';
host4.attachShadow({mode: 'closed'}).innerHTML = '<style> :lang(ja)::slotted(*) { background: green !important; } </style><slot lang="ja"></slot>';
</script>
</body>
</html>
