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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="resources/shadow-dom.js"></script>
<script src="resources/focus-utils.js"></script>
<p>Tests for moving focus by pressing tab key across nodes in slot scope.<br>
<button id="b1">outside</button>
<div id='host'>
<template data-mode='open'>
<slot></slot>
</template>
<slot>
<button id="1A">single nested slot</button>
<button id="1B">single nested slot</button>
</slot>
<slot>
<button id="1C">single nested slot</button>
</slot>
<slot>
<slot>
<button id="2A">double nested slot</button>
<button id="2B">double nested slot</button>
</slot>
</slot>
<slot>
<button id="3A">single nested slot</button>
<slot>
<button id="3B">double nested slot</button>
<slot>
<button id="3C">Triple nested slot</button>
<button id="3D">Triple nested slot</button>
</slot>
<button id="3E">double nested slot</button>
</slot>
<button id="3F">single nested slot</button>
</slot>
</div>
<button id="b2">outside</button>
<script>
'use strict';
promise_test(async () => {
convertTemplatesToShadowRootsWithin(host);
let elements = [
'b1',
'1A',
'1B',
'1C',
'2A',
'2B',
'3A',
'3B',
'3C',
'3D',
'3E',
'3F',
'b2',
];
await assert_focus_navigation_forward(elements);
elements.reverse();
await assert_focus_navigation_backward(elements);
}, 'Focus should cover assigned nodes of slot, especially for nested slots in slot scope.');
</script>
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