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<!DOCTYPE html>
<title>Declarative Shadow DOM Element Attachment</title>
<link rel='author' href='mailto:masonf@chromium.org'>
<link rel='help' href='https://github.com/whatwg/dom/issues/1235'>
<link rel='help' href='https://github.com/whatwg/html/pull/10069'>
<link rel='help' href='https://github.com/whatwg/dom/pull/1246'>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script src='../../html/resources/common.js'></script>
<script src="support/helpers.js"></script>
<div id=multiple1>
<template shadowrootmode=open>Open</template>
<template shadowrootmode=closed>Closed</template>
</div>
<div id=multiple2>
<template shadowrootmode=closed>Closed</template>
<template shadowrootmode=open>Open</template>
</div>
<script>
test((t) => {
let shadow = multiple1.shadowRoot;
assert_true(!!shadow,'Remaining shadow root should be open');
assert_equals(shadow.textContent,"Open");
shadow = multiple2.shadowRoot;
assert_false(!!shadow,'Remaining shadow root should be closed');
multiple1.remove(); // Cleanup
multiple2.remove();
},'Repeated declarative shadow roots keep only the first');
</script>
<div id=open1>
<template shadowrootmode=open>Open</template>
</div>
<script>
test((t) => {
assert_throws_dom("NotSupportedError",() => {
open1.attachShadow({mode: "closed"});
},'Mismatched shadow root type should throw');
const initialShadow = open1.shadowRoot;
const shadow = open1.attachShadow({mode: "open"}); // Shouldn't throw
assert_equals(shadow,initialShadow,'Same shadow should be returned');
assert_equals(shadow.textContent,'','Shadow should be empty');
},'Calling attachShadow() on declarative shadow root must match type');
</script>
<div id=open2>
<template shadowrootmode=open shadowrootdelegatesfocus shadowrootclonable>
Open, delegates focus (not the default), clonable (not the default)
named slot assignment (the default)
</template>
</div>
<script>
test((t) => {
assert_throws_dom("NotSupportedError",() => {
open2.attachShadow({mode: "closed", delegatesFocus: true, slotAssignment: "named", clonable: true});
},'Mismatched shadow root type should throw');
assert_throws_dom("NotSupportedError",() => {
open2.attachShadow({mode: "open", delegatesFocus: false, slotAssignment: "named", clonable: true});
},'Mismatched shadow root delegatesFocus should throw');
assert_throws_dom("NotSupportedError",() => {
open2.attachShadow({mode: "open", delegatesFocus: true, slotAssignment: "manual", clonable: true});
},'Mismatched shadow root slotAssignment should throw');
assert_throws_dom("NotSupportedError",() => {
open2.attachShadow({mode: "open", delegatesFocus: true, slotAssignment: "named", clonable: false});
},'Mismatched shadow root clonable should throw');
const initialShadow = open2.shadowRoot;
const shadow = open2.attachShadow({mode: "open", delegatesFocus: true, slotAssignment: "named", clonable: true}); // Shouldn't throw
assert_equals(shadow,initialShadow,'Same shadow should be returned');
assert_equals(shadow.textContent,'','Shadow should be empty');
},'Calling attachShadow() on declarative shadow root must match all parameters');
</script>
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