| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>CSS Position Test: ::backdrop is tree abiding, allowed after ::slotted</title> |
| <link rel="help" href="https://drafts.csswg.org/css-position-4/#backdrop"> |
| <link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#tree-abiding"> |
| <link rel="help" href="https://drafts.csswg.org/css-scoping/#slotted-pseudo"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <div> |
| <template shadowrootmode="open"> |
| <style> |
| ::slotted(dialog)::backdrop { |
| background-color: green; |
| } |
| </style> |
| <slot></slot> |
| </template> |
| <dialog id="target"></dialog> |
| </div> |
| <script> |
| const target = document.getElementById("target"); |
| target.showModal(); |
| |
| test(() => { |
| assert_equals(getComputedStyle(target, "::backdrop").backgroundColor, "rgb(0, 128, 0)"); |
| }, "::backdrop is tree-abiding and should be allowed after ::slotted()"); |
| </script> |
