| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Check for crash at step #12 of HTML Constructors</title> |
| <meta name='author' href='mailto:masonf@chromium.org'> |
| <link rel='help' href='https://html.spec.whatwg.org/multipage/dom.html#html-element-constructors'> |
| <link rel='help' href='https://crbug.com/1197894'> |
| |
| <uh-oh></uh-oh> |
| |
| <script type="module"> |
| Reflect.preventExtensions(document.querySelector('uh-oh')); |
| customElements.define('uh-oh', class extends HTMLElement {}); |
| </script> |
| |
| This test passes if it does not crash. |
