| <?xml version="1.0" encoding="utf-8"?> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <script> | |
| customElements.define('custom-el-1', | |
| class extends HTMLElement { | |
| constructor () { | |
| super() | |
| this.attachShadow({ mode: 'open' }) | |
| this.shadowRoot.innerHTML = '<span/>' | |
| } | |
| }) | |
| </script> | |
| </head> | |
| <body> | |
| <custom-el-1/> |