| <!DOCTYPE html> |
| <title>@container: scroll-state(scrolled) state is persisted across horizontal and vertical scrolling</title> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#scrolled"> |
| <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 { |
| width: 200px; |
| height: 200px; |
| container-type: scroll-state; |
| overflow: scroll; |
| } |
| #filler { |
| height: 600px; |
| width: 600px; |
| } |
| #target { |
| --top: no; |
| --bottom: no; |
| --left: no; |
| --right: no; |
| --none: no; |
| @container scroll-state(scrolled: top) { |
| --top: yes; |
| } |
| @container scroll-state(scrolled: bottom) { |
| --bottom: yes; |
| } |
| @container scroll-state(scrolled: left) { |
| --left: yes; |
| } |
| @container scroll-state(scrolled: right) { |
| --right: yes; |
| } |
| @container scroll-state(scrolled: none) { |
| --none: yes; |
| } |
| } |
| </style> |
| <div id="scroller"> |
| <div id="filler"> |
| <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).getPropertyValue("--none"), "yes"); |
| |
| assert_equals(getComputedStyle(target).getPropertyValue("--left"), "no"); |
| assert_equals(getComputedStyle(target).getPropertyValue("--right"), "no"); |
| assert_equals(getComputedStyle(target).getPropertyValue("--top"), "no"); |
| assert_equals(getComputedStyle(target).getPropertyValue("--bottom"), "no"); |
| }, "Check that scroll-state(scrolled) state before scrolling"); |
| |
| promise_test(async t => { |
| scroller.scrollBy(300, 0); |
| await waitForAnimationFrames(2); |
| scroller.scrollBy(0, 100); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target).getPropertyValue("--left"), "no"); |
| assert_equals(getComputedStyle(target).getPropertyValue("--right"), "yes"); |
| assert_equals(scroller.scrollLeft, 300); |
| assert_equals(scroller.scrollTop, 100); |
| }, "Check that scroll-state(scrolled) horizontal state is persisted across vertical scroll event"); |
| |
| promise_test(async t => { |
| scroller.scrollBy(0, 100); |
| await waitForAnimationFrames(2); |
| scroller.scrollBy(0, -100); |
| await waitForAnimationFrames(2); |
| scroller.scrollBy(-200, 0); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(target).getPropertyValue("--top"), "yes"); |
| assert_equals(getComputedStyle(target).getPropertyValue("--bottom"), "no"); |
| assert_equals(scroller.scrollLeft, 100); |
| assert_equals(scroller.scrollTop, 100); |
| }, "Check that scroll-state(scrolled) vertical state is persisted across horizontal scroll event"); |
| |
| </script> |
