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<!DOCTYPE html>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" content="https://html.spec.whatwg.org/multipage/custom-elements.html#dom-attachinternals">
<div id="container"></div>
<script>
test(() => {
class MyElement1 extends HTMLElement {
}
customElements.define('my-element1', MyElement1);
const container = document.querySelector('#container');
let element = new MyElement1();
assert_true(element.attachInternals() instanceof ElementInternals,
'New - 1st call');
assert_throws_dom('NotSupportedError', () => { element.attachInternals(); },
'New - 2nd call');
element = document.createElement('my-element1');
assert_true(element.attachInternals() instanceof ElementInternals,
'createElement - 1st call');
assert_throws_dom('NotSupportedError', () => { element.attachInternals(); },
'createElement - 2nd call');
container.innerHTML = '<my-element1></my-element1>';
assert_true(container.firstChild.attachInternals() instanceof ElementInternals,
'Parser - 1st call');
assert_throws_dom('NotSupportedError', () => {
container.firstChild.attachInternals();
}, 'Parser - 2nd call');
}, 'Successful attachInternals() and the second call.');
test(() => {
class MyDiv extends HTMLDivElement {}
customElements.define('my-div', MyDiv, { extends: 'div' });
const customizedBuiltin = document.createElement('div', { is: 'my-div'});
assert_throws_dom('NotSupportedError', () => { customizedBuiltin.attachInternals() });
}, 'attachInternals() throws a NotSupportedError if it is called for ' +
'a customized built-in element');
test(() => {
const builtin = document.createElement('div');
assert_throws_dom('NotSupportedError', () => { builtin.attachInternals() });
const doc = document.implementation.createDocument('foo', null);
const span = doc.appendChild(doc.createElementNS('http://www.w3.org/1999/xhtml', 'html:span'));
assert_true(span instanceof HTMLElement);
assert_throws_dom('NotSupportedError', () => { span.attachInternals(); });
const undefinedCustom = document.createElement('undefined-element');
assert_throws_dom('NotSupportedError', () => { undefinedCustom.attachInternals() });
}, 'If a custom element definition for the local name of the element doesn\'t' +
' exist, throw an NotSupportedError');
test(() => {
class MyElement2 extends HTMLElement {
static get disabledFeatures() { return ['internals']; }
}
customElements.define('my-element2', MyElement2);
const container = document.querySelector('#container');
assert_throws_dom('NotSupportedError', () => {
(new MyElement2).attachInternals();
});
assert_throws_dom('NotSupportedError', () => {
document.createElement('my-element2').attachInternals();
});
assert_throws_dom('NotSupportedError', () => {
container.innerHTML = '<my-element2></my-element2>';
container.firstChild.attachInternals();
});
class MyElement3 extends HTMLElement {
static get disabledFeatures() { return ['INTERNALS']; }
}
customElements.define('my-element3', MyElement3);
assert_true((new MyElement3).attachInternals() instanceof ElementInternals);
}, 'If a custom element definition for the local name of the element has ' +
'disable internals flag, throw a NotSupportedError');
</script>
</body>
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