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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /custom-elements/custom-element-registry/define-customized-builtins.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Custom Elements: Element Definition Customized Builtins</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<div id="log"></div>
<iframe id="iframe"></iframe>
<script>
'use strict';
(() => {
// 2. If name is not a valid custom element name,
// then throw a SyntaxError and abort these steps.
let validCustomElementNames = [
// [a-z] (PCENChar)* '-' (PCENChar)*
'a-',
'a-a',
'aa-',
'aa-a',
'a-.-_',
'a-0123456789',
'a-\u6F22\u5B57', // Two CJK Unified Ideographs
'a-\uD840\uDC0B', // Surrogate pair U+2000B
];
let invalidCustomElementNames = [
undefined,
null,
'',
'-',
'a',
'input',
'mycustomelement',
'A',
'A-',
'0-',
'a-A',
'a-Z',
'A-a',
'a-a\u00D7',
'a-a\u3000',
'a-a\uDB80\uDC00', // Surrogate pair U+F0000
// name must not be any of the hyphen-containing element names.
'annotation-xml',
'color-profile',
'font-face',
'font-face-src',
'font-face-uri',
'font-face-format',
'font-face-name',
'missing-glyph',
];
const iframe = document.getElementById("iframe");
const testWindow = iframe.contentDocument.defaultView;
const customElements = testWindow.customElements;
// 9.1. If extends is a valid custom element name,
// then throw a NotSupportedError.
validCustomElementNames.forEach(name => {
test(() => {
assert_throws_dom('NOT_SUPPORTED_ERR', testWindow.DOMException, () => {
customElements.define('test-define-extend-valid-name', class {}, { extends: name });
});
}, `If extends is ${name}, should throw a NotSupportedError`);
});
// 9.2. If the element interface for extends and the HTML namespace is HTMLUnknownElement
// (e.g., if extends does not indicate an element definition in this specification),
// then throw a NotSupportedError.
[
'bgsound',
'blink',
'isindex',
'multicol',
'nextid',
'spacer',
'elementnametobeunknownelement',
].forEach(name => {
test(() => {
assert_throws_dom('NOT_SUPPORTED_ERR', testWindow.DOMException, () => {
customElements.define('test-define-extend-' + name, class {}, { extends: name });
});
}, `If extends is ${name}, should throw a NotSupportedError`);
});
})();
</script>
</body>