chaining-invalid-selector.html (1894B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <title>CSS Shadow Parts - Chaining Invalid Selector</title> 5 <meta href="mailto:fergal@chromium.org" rel="author" title="Fergal Daly"> 6 <link href="http://www.google.com/" rel="author" title="Google"> 7 <link href="https://drafts.csswg.org/css-shadow-parts/" rel="help"> 8 <script src="/resources/testharness.js"></script> 9 <script src="/resources/testharnessreport.js"></script> 10 <script src="support/shadow-helper.js"></script> 11 </head> 12 <body> 13 <style>#c-e-outer::part(c-e-part)::part(partp) { color: red; }</style> 14 <div> 15 It's invalid to use 2 pseudoelements in a selector but if somehow it becomes valid, 16 it should not expose the internal structure of the shadow tree. 17 </div> 18 <script>installCustomElement("custom-element-inner", "custom-element-inner-template");</script> 19 <template id="custom-element-inner-template"> 20 <style>span { color: green; }</style> 21 <span id="part" part="partp">This text</span> 22 </template> 23 <script>installCustomElement("custom-element-outer", "custom-element-outer-template");</script> 24 <template id="custom-element-outer-template"> 25 The following text should be green: 26 <custom-element-inner id="c-e-inner" part="c-e-part"></custom-element-inner> 27 </template> 28 <custom-element-outer id="c-e-outer"></custom-element-outer> 29 <script> 30 "use strict"; 31 const colorGreen = "rgb(0, 128, 0)"; 32 test(function() { 33 const el = getElementByShadowIds(document, ["c-e-outer", "c-e-inner", "part"]); 34 assert_equals(window.getComputedStyle(el).color, colorGreen); 35 }, "::part cannot be chained to reach elements in the inner host"); 36 test(function() { 37 assert_equals(document.getElementsByTagName("body")[0].style.length, 0); 38 }, "Chained ::part selectors are dropped"); 39 </script> 40 </body> 41 </html>