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<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Test: Blur on shadow host</title>
<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>
<div id="host">
<input id="slotted">
</div>
<script>
const host = document.getElementById("host");
const shadowRoot = host.attachShadow({ mode: "open", delegatesFocus: true });
shadowRoot.innerHTML = "<input><slot>"
test(function() {
host.focus();
assert_equals(document.activeElement, host);
assert_equals(shadowRoot.activeElement, shadowRoot.querySelector("input"));
host.blur();
assert_equals(document.activeElement, document.body);
assert_equals(shadowRoot.activeElement, null);
}, "Calling blur() on shadow host with delegatesFocus should remove the focus.");
test(function() {
const slotted = document.getElementById("slotted");
slotted.focus();
assert_equals(document.activeElement, slotted);
assert_equals(shadowRoot.activeElement, null)
host.blur();
assert_equals(document.activeElement, slotted);
assert_equals(shadowRoot.activeElement, null)
}, "Calling blur() on shadow host with delegatesFocus when the focus is on a slotted element should not remove the focus.");
</script>
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