| <!DOCTYPE html> |
| <title>CSS Anchor Positioning: anchor-scope scopes to the flat tree</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-scope"> |
| <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/10325"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <div id=host> |
| <template shadowrootmode=open> |
| <style> |
| ::slotted(.outer_anchored), .inner_anchored { |
| background: coral; |
| position: absolute; |
| top: anchor(bottom, 1px); |
| position-anchor: --a; |
| width: 5px; |
| height: 5px; |
| } |
| .anchor { |
| background: skyblue; |
| height: 10px; |
| anchor-name: --a; |
| } |
| .cb { |
| position: relative; |
| width: 200px; |
| height: 200px; |
| border: 1px solid black; |
| } |
| .scope { |
| anchor-scope: --a; |
| } |
| </style> |
| <div class=cb> |
| <div class=anchor></div> |
| <div class=scope> |
| <div class=anchor></div> |
| <slot></slot><!-- .outer_anchored appears here in the flat tree--> |
| </div> |
| <div class=inner_anchored></div> |
| </div> |
| </template> |
| <div class=outer_anchored></div> |
| </div> |
| <script> |
| test((t) => { |
| // The outer_anchored element is slotted into the <slot> in |
| // the shadow tree. It should be in the same anchor-scope |
| // as the second .anchor element. |
| let outer_anchored = document.querySelector('.outer_anchored'); |
| assert_equals(getComputedStyle(outer_anchored).top, '20px'); |
| |
| // The inner_anchored element exists directly in the shadow tree, |
| // and can not see the second .anchor since it's hidden behind |
| // an anchor-scope. |
| let inner_anchored = host.shadowRoot.querySelector('.inner_anchored'); |
| assert_equals(getComputedStyle(inner_anchored).top, '10px'); |
| }, 'anchor-scope scopes to the flat tree'); |
| </script> |
| |
