| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Shared style invalidation with removals</title> |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1707116"> |
| <link rel="help" href="https://drafts.csswg.org/css-scoping/"> |
| <link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez"> |
| <link rel="author" href="https://mozilla.org" title="Mozilla"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <div id="host-1"></div> |
| <div id="host-2"></div> |
| <script> |
| const INITIALLY_COMMON_STYLE = `<style>:host { background-color: red !important }</style>`; |
| let helper = document.querySelector("#host-1"); |
| let host = document.querySelector("#host-2"); |
| |
| test(function() { |
| helper.attachShadow({ mode: "open" }).innerHTML = INITIALLY_COMMON_STYLE; |
| assert_equals(getComputedStyle(helper).backgroundColor, "rgb(255, 0, 0)", "Common style should apply to helper"); |
| |
| host.attachShadow({ mode: "open" }).innerHTML = INITIALLY_COMMON_STYLE; |
| assert_equals(getComputedStyle(host).backgroundColor, "rgb(255, 0, 0)", "Common style should apply to host"); |
| |
| host.shadowRoot.innerHTML = `<style>:host { background-color: lime; width: 100px; height: 100px; }</style>`; |
| assert_equals(getComputedStyle(host).backgroundColor, "rgb(0, 255, 0)", "Common style should no longer apply to host"); |
| }); |
| </script> |