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+<!DOCTYPE html>
+<html>
+ <head>
+ <title>CSS Shadow Parts - All Hosts</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>::part(partp) { color: green; }</style>
+ <script>installCustomElement("custom-element", "custom-element-template");</script>
+ <template id="custom-element-template">
+ <style>span { color: red; }</style>
+ <span id="part" part="partp">This text</span>
+ </template>
+ The following text should be green:
+ <custom-element id="c-e-1"></custom-element>
+ The following text should be green:
+ <custom-element id="c-e-2"></custom-element>
+ <script>
+ "use strict";
+ const colorGreen = "rgb(0, 128, 0)";
+ test(function() {
+ const el = getElementByShadowIds(document, ["c-e-1", "part"]);
+ assert_equals(window.getComputedStyle(el).color, colorGreen);
+ }, "::part with host selector styles in first host");
+ test(function() {
+ const el = getElementByShadowIds(document, ["c-e-2", "part"]);
+ assert_equals(window.getComputedStyle(el).color, colorGreen);
+ }, "::part with host selector styles in second host");
+ </script>
+ </body>
+</html>