| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>CSS Shadow Parts - Chaining Invalid 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>#c-e-outer::part(c-e-part)::part(partp) { color: red; }</style> |
| <div> |
| It's invalid to use 2 pseudoelements in a selector but if somehow it becomes valid, |
| it should not expose the internal structure of the shadow tree. |
| </div> |
| <script>installCustomElement("custom-element-inner", "custom-element-inner-template");</script> |
| <template id="custom-element-inner-template"> |
| <style>span { color: green; }</style> |
| <span id="part" part="partp">This text</span> |
| </template> |
| <script>installCustomElement("custom-element-outer", "custom-element-outer-template");</script> |
| <template id="custom-element-outer-template"> |
| The following text should be green: |
| <custom-element-inner id="c-e-inner" part="c-e-part"></custom-element-inner> |
| </template> |
| <custom-element-outer id="c-e-outer"></custom-element-outer> |
| <script type="text/javascript"> |
| "use strict"; |
| const colorGreen = "rgb(0, 128, 0)"; |
| test(function() { |
| var el = getElementByShadowIds(document, ["c-e-outer", "c-e-inner", "part"]); |
| assert_equals(window.getComputedStyle(el).color, colorGreen); |
| }, "::part cannot be chained to reach elements in the inner host"); |
| test(function() { |
| assert_equals(document.getElementsByTagName("body")[0].style.length, 0); |
| }, "Chained ::part selectors are dropped"); |
| </script> |
| </body> |
| </html> |