| <!doctype html> |
| <title>CSS Test: element style is correctly updated for rule with :host(..)</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io"> |
| <link rel="help" href="https://drafts.csswg.org/css-scoping/#host-selector"> |
| <div id="host"><div id="slotted"></div></div> |
| <script> |
| test(function() { |
| let root = host.attachShadow({ mode: "open" }); |
| root.innerHTML = ` |
| <style> |
| :host ::slotted(div) { width: 100px; height: 100px; background: red; } |
| :host(.foo) ::slotted(div) { background: green; } |
| </style> |
| <slot></slot> |
| `; |
| assert_equals(getComputedStyle(slotted).backgroundColor, "rgb(255, 0, 0)"); |
| host.classList.add('foo'); |
| assert_equals(getComputedStyle(slotted).backgroundColor, "rgb(0, 128, 0)"); |
| }); |
| </script> |
