| <!-- | |
| Copyright 2020 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> | |
| <div class="rule1 rule2"></div> | |
| <script> | |
| const sheet1 = new CSSStyleSheet(); | |
| sheet1.insertRule('.rule1 { background-color: rgb(255, 0, 0); }', 0); | |
| const sheet2 = new CSSStyleSheet(); | |
| sheet2.insertRule('.rule2 { background-color: rgb(0, 0, 0); color: rgb(255, 0, 0); }', 0); | |
| document.adoptedStyleSheets = [sheet1, sheet2]; | |
| </script> |