| <!DOCTYPE html> |
| <title>Custom Functions: ShadowDOM (cache pitfall)</title> |
| <link rel="help" href="https://drafts.csswg.org/css-mixins-1/#using-custom-functions"> |
| <link rel="help" href="https://drafts.csswg.org/css-scoping-1/#css-tree-scoped-reference"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/utils.js"></script> |
| |
| <style> |
| @function --a() { result: 42px; } |
| </style> |
| |
| <!-- Should reach --a() defined inside Shadow. --> |
| <div id=host1> |
| <template shadowrootmode=open> |
| <style> |
| @function --a() { |
| result: 10px; |
| } |
| div { |
| width: --a(); |
| } |
| </style> |
| <div id=target></div> |
| </template> |
| </div> |
| |
| <!-- |
| Should reach --a() defined at document level. Except for tree-scopes, |
| the matched rules look identical for #host1 and #host2; we must not |
| hit a cache and cause the same result for both. |
| --> |
| <div id=host2> |
| <template shadowrootmode=open> |
| <style> |
| div { |
| width: --a(); |
| } |
| </style> |
| <div id=target></div> |
| </template> |
| </div> |
| |
| <script> |
| test(() => { |
| let cs1 = getComputedStyle(host1.shadowRoot.querySelector('#target')); |
| let cs2 = getComputedStyle(host2.shadowRoot.querySelector('#target')); |
| assert_equals(cs1.width, '10px'); |
| assert_equals(cs2.width, '42px'); |
| }, 'Tree scope is respected for otherwise identical styles'); |
| </script> |
