Revision b6caee5d1921ae898d9475b21ae1fc8a36e8c601 authored by Luke Bjerring on 05 April 2018, 18:14:57 UTC, committed by Luke Bjerring on 05 April 2018, 18:16:41 UTC
1 parent 1fd16de
Element-interface-attachShadow-custom-element.html
<!DOCTYPE html>
<title>Shadow DOM: Attaching a ShadowRoot for custom elements</title>
<meta name="author" title="Hayato Ito" href="mailto:hayato@chromium.org">
<link rel="help" href="https://dom.spec.whatwg.org/#dom-element-attachshadow">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
class MyAutonomousCustomElement extends HTMLElement {
}
customElements.define('my-custom', MyAutonomousCustomElement);
test(() => {
assert_true(document.createElement('my-custom').attachShadow({mode: "open"}) instanceof ShadowRoot);
}, 'Element.attachShadow must create an instance of ShadowRoot for autonomous custom elements');
class MyCustomizedBuiltinElement extends HTMLInputElement {
}
customElements.define('my-input', MyCustomizedBuiltinElement, { extends: 'input' });
test(() => {
assert_throws({'name': 'NotSupportedError'}, () => {
document.createElement('input', {is: 'my-input'}).attachShadow({mode: "open"});
});
}, 'Element.attachShadow must throw a NotSupportedError for customized built-in elements');
</script>
</body>
</html>
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