41 lines
1.8 KiB
HTML
41 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>CSS Shadow Parts - Chaining Invalid Selector</title>
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<meta href="mailto:fergal@chromium.org" rel="author" title="Fergal Daly">
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<link href="http://www.google.com/" rel="author" title="Google">
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<link href="https://drafts.csswg.org/css-shadow-parts/" rel="help">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="support/shadow-helper.js"></script>
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</head>
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<body>
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<style>#c-e-outer::part(c-e-part)::part(partp) { color: red; }</style>
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<div>
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It's invalid to use 2 pseudoelements in a selector but if somehow it becomes valid,
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it should not expose the internal structure of the shadow tree.
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</div>
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<script>installCustomElement("custom-element-inner", "custom-element-inner-template");</script>
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<template id="custom-element-inner-template">
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<style>span { color: green; }</style>
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<span id="part" part="partp">This text</span>
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</template>
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<script>installCustomElement("custom-element-outer", "custom-element-outer-template");</script>
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<template id="custom-element-outer-template">
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The following text should be green:
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<custom-element-inner id="c-e-inner" part="c-e-part"></custom-element-inner>
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</template>
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<custom-element-outer id="c-e-outer"></custom-element-outer>
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<script>
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"use strict";
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const colorGreen = "rgb(0, 128, 0)";
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test(function() {
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const el = getElementByShadowIds(document, ["c-e-outer", "c-e-inner", "part"]);
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assert_equals(window.getComputedStyle(el).color, colorGreen);
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}, "::part cannot be chained to reach elements in the inner host");
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test(function() {
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assert_equals(document.getElementsByTagName("body")[0].style.length, 0);
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}, "Chained ::part selectors are dropped");
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</script>
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</body>
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</html>
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