<!DOCTYPE html> <html is="my-html"> <head> <meta charset="utf-8"> <meta name="help" content="https://html.spec.whatwg.org/multipage/custom-elements.html#element-definition"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> </head> <body is="my-body"> <div id="container"></div> <script> let testData = [ {tag: 'a', interface: 'HTMLAnchorElement'}, {tag: 'abbr', interface: 'HTMLElement'}, {tag: 'address', interface: 'HTMLElement'}, {tag: 'area', interface: 'HTMLAreaElement'}, {tag: 'article', interface: 'HTMLElement'}, {tag: 'aside', interface: 'HTMLElement'}, {tag: 'audio', interface: 'HTMLAudioElement'}, {tag: 'b', interface: 'HTMLElement'}, {tag: 'base', interface: 'HTMLBaseElement'}, {tag: 'bdi', interface: 'HTMLElement'}, {tag: 'bdo', interface: 'HTMLElement'}, {tag: 'blockquote', interface: 'HTMLQuoteElement'}, {tag: 'body', interface: 'HTMLBodyElement', parsing: 'document'}, {tag: 'br', interface: 'HTMLBRElement'}, {tag: 'button', interface: 'HTMLButtonElement'}, {tag: 'canvas', interface: 'HTMLCanvasElement'}, {tag: 'caption', interface: 'HTMLTableCaptionElement', parsing: 'table'}, {tag: 'cite', interface: 'HTMLElement'}, {tag: 'code', interface: 'HTMLElement'}, {tag: 'col', interface: 'HTMLTableColElement', parsing: 'table'}, {tag: 'colgroup', interface: 'HTMLTableColElement', parsing: 'table'}, {tag: 'data', interface: 'HTMLDataElement'}, {tag: 'dd', interface: 'HTMLElement'}, {tag: 'del', interface: 'HTMLModElement'}, {tag: 'details', interface: 'HTMLDetailsElement'}, {tag: 'dfn', interface: 'HTMLElement'}, {tag: 'div', interface: 'HTMLDivElement'}, {tag: 'dl', interface: 'HTMLDListElement'}, {tag: 'dt', interface: 'HTMLElement'}, {tag: 'em', interface: 'HTMLElement'}, {tag: 'embed', interface: 'HTMLEmbedElement'}, {tag: 'fieldset', interface: 'HTMLFieldSetElement'}, {tag: 'figcaption', interface: 'HTMLElement'}, {tag: 'figure', interface: 'HTMLElement'}, {tag: 'footer', interface: 'HTMLElement'}, {tag: 'form', interface: 'HTMLFormElement'}, {tag: 'h1', interface: 'HTMLHeadingElement'}, {tag: 'h2', interface: 'HTMLHeadingElement'}, {tag: 'h3', interface: 'HTMLHeadingElement'}, {tag: 'h4', interface: 'HTMLHeadingElement'}, {tag: 'h5', interface: 'HTMLHeadingElement'}, {tag: 'h6', interface: 'HTMLHeadingElement'}, {tag: 'header', interface: 'HTMLElement'}, {tag: 'hgroup', interface: 'HTMLElement'}, {tag: 'hr', interface: 'HTMLHRElement'}, {tag: 'html', interface: 'HTMLHtmlElement', parsing: 'document'}, {tag: 'i', interface: 'HTMLElement'}, {tag: 'iframe', interface: 'HTMLIFrameElement'}, {tag: 'img', interface: 'HTMLImageElement'}, {tag: 'input', interface: 'HTMLInputElement'}, {tag: 'ins', interface: 'HTMLModElement'}, {tag: 'kbd', interface: 'HTMLElement'}, {tag: 'label', interface: 'HTMLLabelElement'}, {tag: 'legend', interface: 'HTMLLegendElement'}, {tag: 'li', interface: 'HTMLLIElement'}, {tag: 'link', interface: 'HTMLLinkElement'}, {tag: 'main', interface: 'HTMLElement'}, {tag: 'map', interface: 'HTMLMapElement'}, {tag: 'mark', interface: 'HTMLElement'}, {tag: 'menu', interface: 'HTMLMenuElement'}, {tag: 'meta', interface: 'HTMLMetaElement'}, {tag: 'meter', interface: 'HTMLMeterElement'}, {tag: 'nav', interface: 'HTMLElement'}, {tag: 'noscript', interface: 'HTMLElement'}, {tag: 'object', interface: 'HTMLObjectElement'}, {tag: 'ol', interface: 'HTMLOListElement'}, {tag: 'optgroup', interface: 'HTMLOptGroupElement'}, {tag: 'option', interface: 'HTMLOptionElement'}, {tag: 'output', interface: 'HTMLOutputElement'}, {tag: 'p', interface: 'HTMLParagraphElement'}, {tag: 'param', interface: 'HTMLParamElement'}, {tag: 'picture', interface: 'HTMLPictureElement'}, {tag: 'pre', interface: 'HTMLPreElement'}, {tag: 'progress', interface: 'HTMLProgressElement'}, {tag: 'q', interface: 'HTMLQuoteElement'}, {tag: 'rp', interface: 'HTMLElement'}, {tag: 'rt', interface: 'HTMLElement'}, {tag: 'ruby', interface: 'HTMLElement'}, {tag: 's', interface: 'HTMLElement'}, {tag: 'samp', interface: 'HTMLElement'}, {tag: 'script', interface: 'HTMLScriptElement'}, {tag: 'section', interface: 'HTMLElement'}, {tag: 'select', interface: 'HTMLSelectElement'}, {tag: 'small', interface: 'HTMLElement'}, {tag: 'source', interface: 'HTMLSourceElement'}, {tag: 'span', interface: 'HTMLSpanElement'}, {tag: 'strong', interface: 'HTMLElement'}, {tag: 'style', interface: 'HTMLStyleElement'}, {tag: 'sub', interface: 'HTMLElement'}, {tag: 'summary', interface: 'HTMLElement'}, {tag: 'sup', interface: 'HTMLElement'}, {tag: 'table', interface: 'HTMLTableElement'}, {tag: 'tbody', interface: 'HTMLTableSectionElement', parsing: 'table'}, {tag: 'td', interface: 'HTMLTableCellElement', parsing: 'table'}, {tag: 'template', interface: 'HTMLTemplateElement'}, {tag: 'textarea', interface: 'HTMLTextAreaElement'}, {tag: 'tfoot', interface: 'HTMLTableSectionElement', parsing: 'table'}, {tag: 'th', interface: 'HTMLTableCellElement', parsing: 'table'}, {tag: 'thead', interface: 'HTMLTableSectionElement', parsing: 'table'}, {tag: 'time', interface: 'HTMLTimeElement'}, {tag: 'title', interface: 'HTMLTitleElement'}, {tag: 'tr', interface: 'HTMLTableRowElement', parsing: 'table'}, {tag: 'track', interface: 'HTMLTrackElement'}, {tag: 'u', interface: 'HTMLElement'}, {tag: 'ul', interface: 'HTMLUListElement'}, {tag: 'var', interface: 'HTMLElement'}, {tag: 'video', interface: 'HTMLVideoElement'}, {tag: 'wbr', interface: 'HTMLElement'}, ]; // HTMLDataListElement isn't implemented by all major browsers yet. if (window.HTMLDataListElement) { testData.push({tag: 'datalist', interface: 'HTMLDataListElement'}); } // HTMLDialogElement isn't implemented by all major browsers yet. if (window.HTMLDialogElement) { testData.push({tag: 'dialog', interface: 'HTMLDialogElement'}); } // HTMLSlotElement isn't implemented by all major browsers yet. if (window.HTMLSlotElement) { testData.push({tag: 'slot', interface: 'HTMLSlotElement'}); } for (const t of testData) { test(() => { let name = 'my-' + t.tag; let klass = eval(`(class extends ${t.interface} {})`); customElements.define(name, klass, { extends: t.tag }); test(() => { let customized = new klass(); assert_equals(customized.constructor, klass); assert_equals(customized.cloneNode().constructor, klass, 'Cloning a customized built-in element should succeed.'); }, `${t.tag}: Operator 'new' should instantiate a customized built-in element`); test(() => { let customized = document.createElement(t.tag, { is: name }); assert_equals(customized.constructor, klass); assert_equals(customized.cloneNode().constructor, klass, 'Cloning a customized built-in element should succeed.'); }, `${t.tag}: document.createElement() should instantiate a customized built-in element`); if (t.parsing == 'document') { let test = async_test(`${t.tag}: document parser should instantiate a customized built-in element`); window.addEventListener('load', test.step_func_done(() => { let customized = document.querySelector(t.tag); assert_equals(customized.constructor, klass); assert_equals(customized.cloneNode().constructor, klass, 'Cloning a customized built-in element should succeed.'); })); return; } test(() => { let container = document.getElementById('container'); if (t.parsing == 'table') { container.innerHTML = `<table><${t.tag} is="${name}" id="${name}">`; } else { container.innerHTML = `<${t.tag} is="${name}" id="${name}">`; } let customized = document.getElementById(name); assert_equals(customized.constructor, klass); assert_equals(customized.cloneNode().constructor, klass, 'Cloning a customized built-in element should succeed.'); }, `${t.tag}: innerHTML should instantiate a customized built-in element`); }, `${t.tag}: Define a customized built-in element`); } </script> </body> </html>