| <!DOCTYPE html> |
| <html class='reftest-wait'> |
| <title>Sticky elements should invalidate when top/left/bottom/right changes</title> |
| <link rel="match" href="position-sticky-change-top-ref.html" /> |
| <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> |
| <link rel="help" href="https://crbug.com/939632"> |
| <meta name="assert" content="This test checks that sticky elements are invalidated correctly when top/left/bottom/right change "/> |
| |
| <script src="/common/reftest-wait.js"></script> |
| <script src="../resources/ref-rectangle.js"></script> |
| |
| <!-- |
| It is important for this test that the sticky element is viewport-bound, and |
| that multiple animation frames pass before changing the style. |
| --> |
| <style> |
| .marker { |
| background: red; |
| position: absolute; |
| top: 200px; |
| height: 100px; |
| width: 100px; |
| } |
| |
| .sticky { |
| /* Triggers promotion without creating stacking context. */ |
| backface-visibility: hidden; |
| background: green; |
| position: sticky; |
| top: 0; |
| width: 100px; |
| height: 100px; |
| } |
| |
| .spacer { |
| height: 200vh; |
| } |
| </style> |
| <div class="marker"></div> |
| |
| <div class="sticky"></div> |
| <div class="spacer"></div> |
| |
| <script> |
| requestAnimationFrame(() => { |
| requestAnimationFrame(() => { |
| document.querySelector('.sticky').style.setProperty('top', '200px'); |
| createIndicatorForStickyElements(document.querySelectorAll('.sticky')); |
| takeScreenshot(); |
| }); |
| }); |
| </script> |
| </html> |
