101 lines
4 KiB
HTML
101 lines
4 KiB
HTML
<!DOCTYPE html>
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<title>Shadow DOM: Attaching a ShadowRoot for custom elements</title>
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<meta name="author" title="Hayato Ito" href="mailto:hayato@chromium.org">
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<link rel="help" href="https://dom.spec.whatwg.org/#dom-element-attachshadow">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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class MyAutonomousCustomElement extends HTMLElement {
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}
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customElements.define('my-custom', MyAutonomousCustomElement);
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test(() => {
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assert_true(document.createElement('my-custom').attachShadow({mode: "open"}) instanceof ShadowRoot);
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}, 'Element.attachShadow must create an instance of ShadowRoot for autonomous custom elements');
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test(() => {
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assert_true(document.createElement('undefined-custom').attachShadow({mode: 'open'}) instanceof ShadowRoot);
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}, 'Element.attachShadow must create an instance of ShadowRoot for undefined autonomous custom elements');
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test(() => {
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class ShadowDisabledElement extends HTMLElement {
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static get disabledFeatures() { return ['shadow']; }
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}
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// No definition. attachShadow() should succeed.
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let element = document.createElement('shadow-disabled-element');
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element.attachShadow({mode: 'closed'});
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// No definition and it's already a host.
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assert_throws_dom('NotSupportedError', () => {
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element.attachShadow({mode: 'closed'});
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}, 'No definition, host');
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// The element has a definition, and it's already a host.
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customElements.define('shadow-disabled-element', ShadowDisabledElement);
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assert_throws_dom('NotSupportedError', () => {
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element.attachShadow({mode: 'closed'});
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}, 'Definition, host');
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// The element has a definition, and it's not a host.
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assert_throws_dom('NotSupportedError', () => {
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document.createElement('shadow-disabled-element').attachShadow({mode: 'closed'});
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}, 'Definition, not a host');
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}, 'Element.attachShadow for an autonomous custom element with ' +
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'disabledFeatures=["shadow"] should throw a NotSupportedError');
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test(() => {
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class ShadowDisabledHeadingElement extends HTMLHeadingElement {
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static get disabledFeatures() { return ['shadow']; }
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}
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// No definition. attachShadow() should succeed.
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let element = document.createElement('h2',
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{is: 'shadow-disabled-heading-element'});
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element.attachShadow({mode: 'closed'});
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// No definition and it's already a host.
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assert_throws_dom('NotSupportedError', () => {
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element.attachShadow({mode: 'closed'});
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}, 'No definition, host.');
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// The element has a definition, and it's already a host.
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customElements.define('shadow-disabled-heading-element',
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ShadowDisabledHeadingElement, {extends: 'h2'});
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assert_throws_dom('NotSupportedError', () => {
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element.attachShadow({mode: 'closed'});
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}, 'Definition, host');
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// The element has a definition, and it's not a host.
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let h2 = document.createElement('h2', {is: 'shadow-disabled-heading-element'});
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assert_throws_dom('NotSupportedError', () => {
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h2.attachShadow({mode: 'closed'});
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}, 'Definition, not a host');
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}, 'Element.attachShadow for a customized built-in element with ' +
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'disabledFeatures=["shadow"] should throw a NotSupportedError');
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test(() => {
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class CapitalShadowDisabledElement extends HTMLElement {
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static get disabledFeatures() { return ['SHADOW']; }
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}
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customElements.define('capital-shadow-disabled-element', CapitalShadowDisabledElement);
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// Test fails if this throws
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document.createElement('capital-shadow-disabled-element').attachShadow({mode: 'open'});
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}, 'Element.attachShadow for a custom element with disabledFeatures=["SHADOW"] should not throw a NotSupportedError');
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class MyCustomizedBuiltinElement extends HTMLInputElement {
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}
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customElements.define('my-input', MyCustomizedBuiltinElement, { extends: 'input' });
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test(() => {
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assert_throws_dom('NotSupportedError', () => {
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document.createElement('input', {is: 'my-input'}).attachShadow({mode: "open"});
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});
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}, 'Element.attachShadow must throw a NotSupportedError for customized built-in elements');
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</script>
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</body>
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</html>
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