| <!-- |
| Copyright 2021 The Chromium Authors |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| <!DOCTYPE html> |
| <script> |
| class LoginElement extends HTMLElement { |
| constructor() { |
| super(); |
| const shadow = this.attachShadow({ mode: 'open' }); |
| shadow.innerHTML = ` |
| <p>sss</p> |
| <button>Login</button> |
| `; |
| } |
| } |
| customElements.define('login-element', LoginElement); |
| </script> |
| <header> |
| <login-element></login-element> |
| </header> |
| <main> |
| <login-element></login-element> |
| </main> |
