| <!DOCTYPE html> |
| <title>Scroll marker group on multicol fieldset</title> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-marker-group"> |
| <link rel="help" href="https://html.spec.whatwg.org/#anonymous-fieldset-content-box"> |
| <style> |
| #scroller { |
| overflow: hidden; |
| columns: 2; |
| column-fill: auto; |
| padding: 0; |
| gap: 0; |
| width: 400px; |
| height: 100px; |
| scroll-marker-group: before; |
| } |
| |
| #scroller::scroll-marker-group { |
| display: flex; |
| height: 200px; |
| background: gray; |
| } |
| |
| #scroller>div::scroll-marker { |
| display: block; |
| width: 25px; |
| height: 50%; |
| content: ""; |
| background: yellow; |
| } |
| </style> |
| <fieldset id="scroller"> |
| <legend>Legend</legend> |
| <div style="break-before:column;">first</div> |
| <div style="break-before:column;">second</div> |
| <div style="break-before:column;">third</div> |
| <div style="break-before:column;">fourth</div> |
| </fieldset> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script> |
| promise_test(async t => { |
| assert_equals(scroller.scrollLeft, 0); |
| await new test_driver.Actions().pointerMove(60, 10).pointerDown().pointerUp().send(); |
| assert_equals(scroller.scrollLeft, 200); |
| }, "Click on third scroll marker"); |
| </script> |
