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+<!DOCTYPE html>
+<html>
+ <head>
+ <title>CSS Shadow Parts - Invalidation Complex Selector</title>
+ <meta href="mailto:fergal@chromium.org" rel="author" title="Fergal Daly">
+ <link href="http://www.google.com/" rel="author" title="Google">
+ <link href="https://drafts.csswg.org/css-shadow-parts/" rel="help">
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+ <script src="support/shadow-helper.js"></script>
+ </head>
+ <body>
+ <style>#elem #c-e::part(partp) { color: red; }</style>
+ <script>installCustomElement("custom-element", "custom-element-template");</script>
+ <template id="custom-element-template">
+ <style>span { color: green; }</style>
+ <span id="part" part="partp">This text</span>
+ </template>
+ The following text should be green:
+ <div id="elem"><custom-element id="c-e"></custom-element></div>
+ <script>
+ "use strict";
+ test(function() {
+ const part = getElementByShadowIds(document, ["c-e", "part"]);
+ const before = window.getComputedStyle(part).color;
+ document.getElementById("elem").setAttribute("id", "new-elem");
+ const after = window.getComputedStyle(part).color;
+ assert_not_equals(before, after);
+ }, "Part in selected host changed color");
+ </script>
+ </body>
+</html>