shadow-host-removal-invalidation.html (922B)
1 <!doctype html> 2 <title>CSS Test: Invalidation of :host selectors</title> 3 <link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io"> 4 <link rel="author" title="Mozilla" href="https://mozilla.org"> 5 <link rel="help" href="https://drafts.csswg.org/css-scoping/#host-selector"> 6 <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1499603"> 7 <script src="/resources/testharness.js"></script> 8 <script src="/resources/testharnessreport.js"></script> 9 <div id="host" style="color: green"></div> 10 <script> 11 host.attachShadow({ mode: "open" }).innerHTML = ` 12 <style> 13 :host { color: red !important } 14 </style> 15 `; 16 test(function() { 17 assert_equals(getComputedStyle(host).color, "rgb(255, 0, 0)"); 18 host.shadowRoot.querySelector("style").remove(); 19 assert_equals(getComputedStyle(host).color, "rgb(0, 128, 0)"); 20 }, ":host rules are properly invalidated when stylesheets are removed"); 21 </script>