| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <link rel="author" href="mailto:masonf@chromium.org"> |
| <link rel="help" href="https://crbug.com/1300584"> |
| <script src='/resources/testharness.js'></script> |
| <script src='/resources/testharnessreport.js'></script> |
| <script src="/resources/declarative-shadow-dom-polyfill.js"></script> |
| |
| <div id=host> |
| <template shadowrootmode=open> |
| <button><slot></slot></button> |
| </template> |
| <span>Content</span> |
| </div> |
| |
| <script> |
| const host = document.getElementById('host'); |
| setup(() => { |
| polyfill_declarative_shadow_dom(host); |
| }); |
| test(() => { |
| const shadowButton = host.shadowRoot.querySelector('button'); |
| shadowButton.focus(); |
| assert_equals(document.activeElement,host,'nodes within shadow DOM aren\'t exposed'); |
| host.textContent = 'New Content'; |
| assert_equals(document.activeElement,host,'Clearing light DOM shouldn\'t clear focus'); |
| },'Don\'t clear focus within shadow root if light DOM children are cleared'); |
| </script> |
| |