| <!DOCTYPE html> |
| <title>CSS Overflow Test: ::scroll-marker dynamic style change</title> |
| <link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-buttons"> |
| <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> |
| <style> |
| #scroller { |
| overflow: hidden; |
| scroll-marker-group: before; |
| columns: 1; |
| gap: 0; |
| height: 100px; |
| width: 100px; |
| } |
| #scroller::scroll-marker-group { |
| display: flex; |
| width: 100px; |
| height: 100px; |
| background: red; |
| } |
| #scroller::column::scroll-marker { |
| width: 20px; |
| height: 100px; |
| content: ""; |
| } |
| #scroller.extra::column::scroll-marker { |
| display: flex; |
| background: green; |
| } |
| </style> |
| <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> |
| <div id="scroller"> |
| <div style="height:401px;"></div> |
| </div> |
| <script> |
| document.body.offsetTop; |
| scroller.className = "extra"; |
| </script> |
