| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>Custom Elements: create an element for a token must perform a microtask checkpoint</title> |
| <meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org"> |
| <meta name="assert" content="When the HTML parser creates an element for a token, it must perform a microtask checkpoint before invoking the constructor"> |
| <meta name="help" content="https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token"> |
| <meta name="help" content="https://html.spec.whatwg.org/multipage/webappapis.html#perform-a-microtask-checkpoint"> |
| <meta name="help" content="https://html.spec.whatwg.org/multipage/parsing.html#adoption-agency-algorithm"> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script src="../../imported/w3c/web-platform-tests/custom-elements/resources/custom-elements-helpers.js"></script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <script> |
| |
| async function construct_custom_element_in_parser(test, markup) |
| { |
| const window = await create_window_in_test(test, ` |
| <!DOCTYPE html> |
| <html> |
| <body><script> |
| class SomeElement extends HTMLElement { |
| constructor() { |
| super(); |
| window.recordsListInConstructor = recordsList.map((records) => records.slice(0)); |
| } |
| } |
| customElements.define('some-element', SomeElement); |
| |
| const recordsList = []; |
| const observer = new MutationObserver((records) => { |
| recordsList.push(records); |
| }); |
| observer.observe(document.body, {childList: true, subtree: true}); |
| |
| window.onload = () => { |
| window.recordsListInDOMContentLoaded = recordsList.map((records) => records.slice(0)); |
| } |
| |
| </scr` + `ipt>${markup}</body></html>`); |
| return window; |
| } |
| |
| promise_test(async function () { |
| const contentWindow = await construct_custom_element_in_parser(this, '<b><some-element></b>'); |
| const contentDocument = contentWindow.document; |
| |
| let recordsList = contentWindow.recordsListInConstructor; |
| assert_true(Array.isArray(recordsList)); |
| assert_equals(recordsList.length, 1); |
| assert_true(Array.isArray(recordsList[0])); |
| assert_equals(recordsList[0].length, 1); |
| let record = recordsList[0][0]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.body); |
| assert_equals(record.previousSibling, contentDocument.querySelector('script')); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelector('b')); |
| |
| recordsList = contentWindow.recordsListInDOMContentLoaded; |
| assert_true(Array.isArray(recordsList)); |
| assert_equals(recordsList.length, 2); |
| assert_true(Array.isArray(recordsList[1])); |
| assert_equals(recordsList[1].length, 1); |
| record = recordsList[1][0]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.querySelector('b')); |
| assert_equals(record.previousSibling, null); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelector('some-element')); |
| }, 'HTML parser must perform a microtask checkpoint before constructing a custom element'); |
| |
| promise_test(async function () { |
| const contentWindow = await construct_custom_element_in_parser(this, '<b><i>hello</b><some-element>'); |
| const contentDocument = contentWindow.document; |
| let recordsList = contentWindow.recordsListInConstructor; |
| assert_true(Array.isArray(recordsList)); |
| assert_equals(recordsList.length, 1); |
| assert_true(Array.isArray(recordsList[0])); |
| assert_equals(recordsList[0].length, 4); |
| |
| let record = recordsList[0][0]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.body); |
| assert_equals(record.previousSibling, contentDocument.querySelector('script')); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelector('b')); |
| |
| record = recordsList[0][1]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.querySelector('b')); |
| assert_equals(record.previousSibling, null); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelector('i')); |
| |
| record = recordsList[0][2]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.querySelector('i')); |
| assert_equals(record.previousSibling, null); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0].nodeType, Node.TEXT_NODE); |
| assert_equals(record.addedNodes[0].data, "hello"); |
| |
| record = recordsList[0][3]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.body); |
| assert_equals(record.previousSibling, contentDocument.querySelector('b')); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelectorAll('i')[1]); |
| |
| recordsList = contentWindow.recordsListInDOMContentLoaded; |
| assert_true(Array.isArray(recordsList)); |
| assert_equals(recordsList.length, 2); |
| assert_true(Array.isArray(recordsList[1])); |
| assert_equals(recordsList[1].length, 1); |
| |
| record = recordsList[1][0]; |
| assert_equals(record.type, 'childList'); |
| assert_equals(record.target, contentDocument.querySelectorAll('i')[1]); |
| assert_equals(record.previousSibling, null); |
| assert_equals(record.nextSibling, null); |
| assert_equals(record.removedNodes.length, 0); |
| assert_equals(record.addedNodes.length, 1); |
| assert_equals(record.addedNodes[0], contentDocument.querySelector('some-element')); |
| }, 'HTML parser must perform a microtask checkpoint before constructing a custom element during the adoption agency algorithm'); |
| |
| </script> |
| </body> |
| </html> |
