servo/tests/wpt/css-tests/selectors-4_dev/html/focus-within-shadow-005.htm

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<!DOCTYPE html>
<html lang="en"><head><meta charset="utf-8">
<title>Selectors Level 4: focus-within with shadow DOM</title>
<link href="mailto:kli79@bloomberg.net" rel="author" title="Keyong Li">
<link href="https://drafts.csswg.org/selectors-4/#focus-within-pseudo" rel="help">
<link href="reference/focus-within-shadow-001-ref.htm" rel="match">
<meta content="interact dom" name="flags">
<meta content="Test that :focus-within propagates through nested shadow DOMs containing a focused element." name="assert">
<style>
#target:focus-within {
border: solid 15px green;
}
</style>
</head><body>
<p>Test passes if there is a green rectangle below.</p>
<div id="target">
<div>
<div>
<div>
<div id="shadow-host"><strong>Skip this test, shadow DOM is not supported.</strong></div>
</div>
</div>
</div>
</div>
<template id="shadow-template">
<div id="nested-shadow-host"><strong>Skip this test, nested shadow hosts are not supported.</strong></div>
</template>
<template id="nested-shadow-template">
<style>
/* Suppress things that cannot be reproduced in the reference file */
:focus {
outline: none;
}
</style>
<div onfocus="this.classList.toggle('reftest-wait');" tabindex="1" id="focusme" class="reftest-wait"></div>
</template>
<script>
var shadow = document.getElementById('shadow-host').createShadowRoot();
var template = document.getElementById('shadow-template');
var instance = document.importNode(template.content, true);
shadow.appendChild(instance);
window.setTimeout(function() {
shadow = shadow.getElementById('nested-shadow-host').createShadowRoot();
template = document.getElementById('nested-shadow-template');
instance = document.importNode(template.content, true);
shadow.appendChild(instance);
}, 0);
window.setTimeout(function() {
var focusme = shadow.getElementById('focusme');
focusme.focus();
}, 0);
</script>
</body></html>