custom-elements/registries/Document-importNode.html

<!DOCTYPE html>
<html>
<head>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<link rel="help" href="https://github.com/whatwg/html/issues/10854">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="host">
    <template shadowrootmode="open" shadowrootclonable="true" shadowrootcustomelementregistry>
        <div>
            <some-element></some-element>
            <other-element></other-element>
        </div>
    </template>
</div>
<template id="template">
    <some-element>
        <template shadowrootmode="closed" shadowrootclonable="true" shadowrootcustomelementregistry>
            <div>
                <some-element></some-element>
                <other-element></other-element>
            </div>
        </template>
    </some-element>
</template>
<div id="root">
    <span></span>
</div>
<script>

const scopedRegistry = new CustomElementRegistry();
const emptyRegistry = new CustomElementRegistry();
class GlobalSomeElement extends HTMLElement {
    elementInternals;

    constructor() {
        super();
        this.elementInternals = this.attachInternals();
        if (this.elementInternals.shadowRoot)
            scopedRegistry.initialize(this.elementInternals.shadowRoot);
    }
};
class GlobalOtherElement extends HTMLElement {};
class ScopedSomeElement extends HTMLElement {};
customElements.define('some-element', GlobalSomeElement);
customElements.define('other-element', GlobalOtherElement);
scopedRegistry.define('some-element', ScopedSomeElement);

test(() => {
    assert_true(document.importNode(document.createElement('some-element')) instanceof GlobalSomeElement);
}, 'importNode should clone using the global regsitry by default');

test(() => {
    assert_true(document.importNode(document.createElement('some-element'), {customElementRegistry: scopedRegistry}) instanceof ScopedSomeElement);
}, 'importNode should clone using the specified scoped regsitry');

test(() => {
    const clone = document.importNode(host, {selfOnly: false, customElementRegistry: scopedRegistry});
    assert_equals(clone.shadowRoot.querySelector('some-element').__proto__.constructor.name, 'HTMLElement');
    assert_false(clone.shadowRoot.querySelector('some-element') instanceof GlobalSomeElement);
    assert_false(clone.shadowRoot.querySelector('some-element') instanceof ScopedSomeElement);
    assert_true(clone.shadowRoot.querySelector('other-element') instanceof HTMLElement);
    assert_false(clone.shadowRoot.querySelector('other-element') instanceof GlobalOtherElement);
}, 'importNode should preserve null-ness of custom element registry');

test(() => {
    const clone = document.importNode(host.shadowRoot.querySelector('div'), {selfOnly: false});
    assert_equals(clone.customElementRegistry, window.customElements);
    assert_true(clone.querySelector('some-element') instanceof GlobalSomeElement);
    assert_true(clone.querySelector('other-element') instanceof GlobalOtherElement);
}, 'importNode should clone a shadow host with a declarative shadow DOM using the global registry by default');

test(() => {
    const clone = document.importNode(host.shadowRoot.querySelector('div'), {selfOnly: false, customElementRegistry: scopedRegistry});
    assert_equals(clone.customElementRegistry, scopedRegistry);
    assert_true(clone.querySelector('some-element') instanceof ScopedSomeElement);
    assert_false(clone.querySelector('other-element') instanceof GlobalOtherElement);
}, 'importNode should clone a shadow host with a declarative shadow DOM using a specified scoped registry');

test(() => {
    const element = document.createElement('div', {customElementRegistry: emptyRegistry});
    element.innerHTML = '<some-element></some-element><other-element></other-element>';
    const clone = document.importNode(element, {selfOnly: false, customElementRegistry: scopedRegistry});
    assert_equals(clone.customElementRegistry, scopedRegistry);
    assert_true(clone.querySelector('some-element') instanceof ScopedSomeElement);
    assert_false(clone.querySelector('other-element') instanceof GlobalOtherElement);
}, 'importNode should clone an element originating from a scoped registry using another scoped registry');

test(() => {
    const template = document.createElement('template');
    template.innerHTML = '<div><some-element>hello</some-element><other-element>world</other-element></div>';
    assert_equals(template.content.querySelector('some-element').__proto__.constructor.name, 'HTMLElement');
    assert_equals(template.content.querySelector('other-element').__proto__.constructor.name, 'HTMLElement');
    const clone = document.importNode(template.content, {selfOnly: false});
    assert_equals(clone.querySelector('some-element').customElementRegistry, window.customElements);
    assert_equals(clone.querySelector('some-element').__proto__.constructor.name, 'GlobalSomeElement');
    assert_equals(clone.querySelector('other-element').__proto__.constructor.name, 'GlobalOtherElement');
}, 'importNode should clone a template content using the global registry by default');

test(() => {
    const template = document.createElement('template');
    template.innerHTML = '<div><some-element>hello</some-element><other-element>world</other-element></div>';
    assert_equals(template.content.querySelector('some-element').__proto__.constructor.name, 'HTMLElement');
    assert_equals(template.content.querySelector('other-element').__proto__.constructor.name, 'HTMLElement');
    const clone = document.importNode(template.content, {selfOnly: false, customElementRegistry: scopedRegistry});
    assert_equals(clone.querySelector('some-element').customElementRegistry, scopedRegistry);
    assert_equals(clone.querySelector('some-element').__proto__.constructor.name, 'ScopedSomeElement');
    assert_equals(clone.querySelector('other-element').__proto__.constructor.name, 'HTMLElement');
}, 'importNode should clone a template content using a specified scoped registry');

test(() => {
    const template = document.createElement('template');
    template.innerHTML = `
<div>
    <some-element>
        <template>
            <other-element>
                hello
            </other-element>
        </template>
    </some-element>
    <other-element>
        world
    </other-element>
</div>`;
    assert_equals(template.content.querySelector('some-element').__proto__.constructor.name, 'HTMLElement');
    assert_equals(template.content.querySelector('other-element').__proto__.constructor.name, 'HTMLElement');
    const clone = document.importNode(template.content, {selfOnly: false});
    assert_equals(clone.querySelector('some-element').customElementRegistry, window.customElements);
    assert_equals(clone.querySelector('some-element').__proto__.constructor.name, 'GlobalSomeElement');
    const otherElementInTemplate = clone.querySelector('template').content.querySelector('other-element');
    assert_equals(otherElementInTemplate.__proto__.constructor.name, 'HTMLElement');
    assert_equals(clone.querySelector('other-element').__proto__.constructor.name, 'GlobalOtherElement');
}, 'importNode should clone a template content with a nested template element using a scoped registry');

test(() => {
    const clone = document.importNode(root);
    assert_false(clone.hasChildNodes());
}, "importNode: don't pass options argument");

test(() => {
    const clone = document.importNode(root, false);
    assert_false(clone.hasChildNodes());
}, "importNode: pass options argument with value false");

test(() => {
    const clone = document.importNode(root, true);
    assert_true(clone.hasChildNodes());
}, "importNode: pass options argument with value true");

test(() => {
    const clone = document.importNode(root, undefined);
    assert_false(clone.hasChildNodes());
}, "importNode: pass options argument with value undefined");

test(() => {
    const clone = document.importNode(root, { });
    assert_true(clone.hasChildNodes());
}, "importNode: pass options argument with value { }");

test(() => {
    const clone = document.importNode(root, { selfOnly: false });
    assert_true(clone.hasChildNodes());
}, "importNode: pass options argument with value { selfOnly: false }");

test(() => {
    const clone = document.importNode(root, { selfOnly: true });
    assert_false(clone.hasChildNodes());
}, "importNode: pass options argument with value { selfOnly: true }");

test(() => {
    const clone = document.importNode(root, { customElementRegistry: scopedRegistry });
    assert_true(clone.hasChildNodes());
}, "importNode: pass options argument with value { customElementRegistry: scopedRegistry }");

test(() => {
    assert_throws_js(TypeError, () => document.importNode(root, { customElementRegistry: null }));
}, "importNode: pass options argument with value { customElementRegistry: null }");

</script>
</body>
</html>