| <!DOCTYPE html> |
| <title>@container: scroll-state(stuck) layout change</title> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#stuck"> |
| <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 { |
| overflow-y: scroll; |
| height: 300px; |
| } |
| #filler { |
| height: 100px; |
| } |
| #stuck { |
| container-type: scroll-state; |
| position: sticky; |
| bottom: 0; |
| height: 100px; |
| background-color: teal; |
| } |
| #target { |
| --stuck: no; |
| @container scroll-state(stuck: bottom) { |
| --stuck: yes; |
| } |
| } |
| </style> |
| <div id="scroller"> |
| <div id="filler"></div> |
| <div id="stuck"> |
| <span id="target"></span> |
| </div> |
| </div> |
| <script> |
| setup(() => assert_implements_scroll_state_container_queries()); |
| |
| promise_test(async t => { |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "no", "Initially not stuck"); |
| }); |
| |
| promise_test(async t => { |
| filler.style.height = "400px"; |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target).getPropertyValue("--stuck"), "yes", "Stuck after #filler height changed"); |
| }); |
| </script> |
