| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <title>Tests position fallback change on scroll with anchor and anchored under the same scroll container</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-1/#scroll"> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback"> |
| <link rel="match" href="anchor-scroll-position-try-012-ref.html"> |
| <style> |
| #scroller { |
| position: relative; |
| width: 400px; |
| height: 400px; |
| overflow-y: scroll; |
| } |
| |
| .box { |
| min-height: 100px; |
| width: 100px; |
| } |
| |
| #anchor { |
| anchor-name: --a; |
| background: orange; |
| } |
| |
| #anchored { |
| position: absolute; |
| top: anchor(bottom); |
| width: 100px; |
| height: 100px; |
| background: green; |
| position-anchor: --a; |
| position-try-fallbacks: --pf; |
| } |
| |
| @position-try --pf { |
| top: auto; |
| bottom: anchor(top); |
| } |
| </style> |
| |
| <div id="scroller"> |
| <div class="box"></div> |
| <div class="box"></div> |
| <div class="box"></div> |
| <div class="box" id="anchor"></div> |
| <div class="box"></div> |
| <div class="box"></div> |
| <div class="box"></div> |
| <div class="box"></div> |
| <div id="anchored"></div> |
| </div> |
| |
| <script> |
| requestAnimationFrame(() => { |
| requestAnimationFrame(() => { |
| scroller.scrollTop = 250; |
| document.documentElement.classList.remove('reftest-wait'); |
| }); |
| }); |
| </script> |
| </html> |
