| <!DOCTYPE html> |
| <title>A composited child of a perspective sticky element should work correctly</title> |
| <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> |
| <meta name="assert" content="This test checks that composited children of perspective sticky elements are positioned correctly." /> |
| |
| <style> |
| .composited { |
| backface-visibility: hidden; |
| } |
| |
| .scroller { |
| overflow-y: scroll; |
| height: 100px; |
| /* Making the scroller positioned causes it to contain the absolute marker. */ |
| position: relative; |
| } |
| |
| .sticky { |
| position: sticky; |
| perspective: 150px; |
| top: 0; |
| height: 50px; |
| width: 50px; |
| } |
| |
| .child { |
| background: green; |
| height: 50px; |
| width: 50px; |
| } |
| |
| .indicator { |
| position: absolute; |
| top: 50px; |
| height: 50px; |
| width: 50px; |
| background: red; |
| } |
| |
| .padding { |
| height: 500px; |
| } |
| </style> |
| |
| <script> |
| window.addEventListener('load', function() { |
| document.querySelector('.scroller').scrollTop = 50; |
| }); |
| </script> |
| |
| <div class="composited scroller"> |
| <div class='indicator'></div> |
| <div class="composited sticky"> |
| <div class="composited child"></div> |
| </div> |
| <div class="padding"></div> |
| </div> |
| |
| <div>You should see one green box above. No red should be visible.</div> |
