focus-pseudo-on-shadow-host-1.html

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This WPT test may be referenced by the following Test IDs:
- /shadow-dom/focus/focus-pseudo-on-shadow-host-1.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">

<meta name="assert" content=":focus should match a shadow host which contains the focused element">

<link rel="help" href="https://html.spec.whatwg.org/#element-has-the-focus">

<link rel="help=" href="https://bugs.webkit.org/show_bug.cgi?id=202432">

<link rel="match" href="/css/reference/ref-filled-green-100px-square.xht">

</head>

<body>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="host"></div>

<style>

#host { background: red; width: 100px; height: 100px; }

#host:focus { background: green; }

</style>

<script>

const shadowRoot = host.attachShadow({mode: 'closed'});

shadowRoot.innerHTML = '<div tabindex="0" style="outline: none;"></div>';

shadowRoot.firstChild.focus();

</script>

</body>

</html>