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<!DOCTYPE html>
<meta charset="utf-8">
<title>Declarative Shadow DOM</title>
<link rel="author" href="mailto:avandolder@mozilla.com">
<link rel="help" href="https://html.spec.whatwg.org/#parsing-main-inhead:available-to-element-internals">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<custom-element>
<template shadowrootmode="open">
</template>
</custom-element>
<script>
let elementInternals;
customElements.define("custom-element", class extends HTMLElement {
constructor() {
super();
elementInternals = this.attachInternals();
}
});
window.onload = () => {
test(() => {
assert_true(!!elementInternals);
assert_true(!!elementInternals.shadowRoot);
assert_equals(elementInternals.shadowRoot, document.querySelector("custom-element").shadowRoot);
}, "Declarative Shadow DOM: shadow root should be available to element internals");
};
</script>
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