| <!-- | |
| Copyright 2022 The Chromium Authors. All rights reserved. | |
| Use of this source code is governed by a BSD-style license that can be | |
| found in the LICENSE file. | |
| --> | |
| <script> | |
| class CustomButton extends HTMLElement { | |
| constructor() { | |
| super(); | |
| const shadow = this.attachShadow({ mode: 'open' }); | |
| shadow.innerHTML = `<slot></slot>`; | |
| } | |
| } | |
| customElements.define('custom-button', CustomButton); | |
| </script> | |
| <custom-button>Click me</custom-button> |