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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<!--
This test is adopted from Olli Pettay's test case at
http://mozilla.pettay.fi/shadow_focus.html
-->
<div id="host"></div>
<input id="lightInput">
<script>
const root = host.attachShadow({ mode: "closed" });
root.innerHTML = "<input id='shadowInput'>";
async_test((test) => {
root.getElementById("shadowInput").focus();
window.addEventListener("focus", test.step_func_done((e) => {
assert_equals(e.relatedTarget, host);
}, "relatedTarget should be pointing to shadow host."), true);
lightInput.focus();
}, "relatedTarget should not leak at capturing phase, at window object.");
async_test((test) => {
root.getElementById("shadowInput").focus();
lightInput.addEventListener("focus", test.step_func_done((e) => {
assert_equals(e.relatedTarget, host);
}, "relatedTarget should be pointing to shadow host."), true);
lightInput.focus();
}, "relatedTarget should not leak at target.");
</script>
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