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<!DOCTYPE html>
<title>Duplicate declarative shadow trees</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=multiple1>
<template shadowrootmode=open>1</template>
<template shadowrootmode=open>2</template>
<template shadowrootmode=open>3</template>
</div>
<div id=multiple2>
<template shadowrootmode=closed>1</template>
<template shadowrootmode=closed>2</template>
<template shadowrootmode=open>3</template>
</div>
<script>
test((t) => {
t.add_cleanup(() => {
multiple1.remove();
multiple2.remove();
});
let shadow = multiple1.shadowRoot;
assert_true(!!shadow,'Remaining shadow root should be open');
assert_equals(shadow.textContent,"1");
assert_equals(multiple1.childElementCount, 2);
assert_equals(multiple1.firstElementChild.content.textContent, "2");
assert_equals(multiple1.lastElementChild.content.textContent, "3");
shadow = multiple2.shadowRoot;
assert_false(!!shadow,'Remaining shadow root should be closed');
assert_equals(multiple2.childElementCount, 2);
assert_equals(multiple2.firstElementChild.content.textContent, "2");
assert_equals(multiple2.lastElementChild.content.textContent, "3");
},'Repeated declarative shadow roots keep only the first');
</script>
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