| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>CSS Mixins: Shadow DOM</title> |
| <link rel="help" href="https://drafts.csswg.org/css-mixins-1/#defining-mixins"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| @mixin --exists-only-outside-shadow() { |
| color: green; |
| } |
| #e4 { |
| color: green; |
| @apply --in-shadow; |
| } |
| </style> |
| </head> |
| <body> |
| <div id="host"> |
| <template shadowrootmode="open"> |
| <style> |
| #e1 { |
| color: red; |
| @apply --exists-only-outside-shadow; |
| } |
| #e2 { |
| color: red; |
| @apply --m1; |
| } |
| #e3 { |
| color: red; |
| @apply --exists-only-in-adopted; |
| } |
| </style> |
| <style> |
| @mixin --m1() { |
| color: green; |
| } |
| @mixin --in-shadow() { |
| color: red; |
| } |
| </style> |
| <div id="e1">This text should be green.</div> |
| <div id="e2">This text should be green.</div> |
| <div id="e3">This text should be green.</div> |
| </template> |
| </div> |
| <div id="e4">This text should be green.</div> |
| <script> |
| const sheet = new CSSStyleSheet(); |
| sheet.replaceSync('@mixin --exists-only-in-adopted() { color: green; }'); |
| document.getElementById('host').shadowRoot.adoptedStyleSheets = [sheet]; |
| |
| test(() => { |
| let target = document.getElementById('host').shadowRoot.getElementById('e1'); |
| assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)'); |
| }, 'Style in shadow DOM should have access to outside non-adopted mixins'); |
| |
| test(() => { |
| let target = document.getElementById('host').shadowRoot.getElementById('e2'); |
| assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)'); |
| }, 'Style in shadow DOM should have access to inside mixins'); |
| |
| test(() => { |
| let target = document.getElementById('host').shadowRoot.getElementById('e3'); |
| assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)'); |
| }, 'Style in shadow DOM should have access to mixins from adopted stylesheets'); |
| |
| test(() => { |
| let target = document.getElementById('e4'); |
| assert_equals(getComputedStyle(target).color, 'rgb(0, 128, 0)'); |
| }, 'Style outside shadow DOM should _not_ have access to inside mixins'); |
| </script> |
| </body> |
| </html> |
