| <!DOCTYPE html> |
| <title>position: sticky should create a stacking context</title> |
| <link rel="match" href="position-sticky-stacking-context-ref.html" /> |
| <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> |
| <meta name="assert" content="position:sticky elements should create a stacking context" /> |
| |
| <script src="../resources/ref-rectangle.js"></script> |
| |
| <style> |
| .indicator { |
| position: absolute; |
| background-color: green; |
| z-index: 1; |
| } |
| |
| .sticky { |
| position: sticky; |
| z-index: 0; |
| } |
| |
| .child { |
| position: relative; |
| background-color: red; |
| z-index: 2; |
| } |
| |
| .box { |
| width: 200px; |
| height: 200px; |
| } |
| </style> |
| |
| <script> |
| window.addEventListener('load', function() { |
| createIndicatorForStickyElements(document.querySelectorAll('.sticky')); |
| }) |
| </script> |
| <div class="indicator box"></div> |
| <div class="sticky box"> |
| <!-- Because sticky forms a stacking context, this child remains on bottom |
| even though it has a higher z-index than the indicator box. --> |
| <div class="child box"></div> |
| </div> |
| |
| <div>You should see a single green box above. No red or blue should be visible.</div> |
