| <!DOCTYPE html> |
| <title>@container: scroll-state(scrollable) for pseudo element</title> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#scrollable"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/css-conditional/container-queries/support/cq-testcommon.js"></script> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <style> |
| #scroller { |
| container-type: scroll-state; |
| overflow: auto; |
| width: 100px; |
| height: 100px; |
| } |
| #wrapper { |
| width: 10px; |
| height: 10px; |
| } |
| #wrapper.large { |
| width: 75px; |
| height: 75px; |
| } |
| #target { |
| width: 200%; |
| height: 200%; |
| --before: no; |
| --after: no; |
| @container scroll-state(scrollable) { |
| &::before { |
| --before: yes; |
| content: " "; |
| } |
| &::after { |
| --after: yes; |
| } |
| } |
| } |
| </style> |
| <div id="scroller"> |
| <div id="wrapper"> |
| <div id="target"></div> |
| </div> |
| </div> |
| <script> |
| setup(() => assert_implements_scroll_state_container_queries()); |
| |
| promise_test(async t => { |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target, "::before").getPropertyValue("--before"), "no"); |
| assert_equals(getComputedStyle(target, "::after").getPropertyValue("--after"), "no"); |
| }, "::before/::after initially not matching"); |
| |
| promise_test(async t => { |
| wrapper.className = "large"; |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target, "::before").getPropertyValue("--before"), "yes"); |
| assert_equals(getComputedStyle(target, "::after").getPropertyValue("--after"), "yes"); |
| }, "::before/::after matching after content starts scrollable #scroller"); |
| |
| </script> |
