declarative-shadow-dom-available-to-element-internals.html

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This WPT test may be referenced by the following Test IDs:
- /shadow-dom/declarative/declarative-shadow-dom-available-to-element-internals.html - WPT Dashboard Interop Dashboard

<!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>