| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>backdrop-filter: fixed position should not cause a backdrop root.</title> |
| <link rel="author" title="Mason Freed" href="mailto:masonfreed@chromium.org"> |
| <link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty"> |
| <link rel="match" href="backdrop-filter-non-isolation-ref.html"> |
| |
| <div> |
| <p>Expected: Two green boxes overlapped by a yellow box. The overlapped region<br> |
| of BOTH green boxes should be inverted (pink).</p> |
| </div> |
| <div class="box outside"> |
| <div class="box stacking-context"> |
| <div class="box filter"> |
| </div> |
| </div> |
| </div> |
| |
| <style> |
| .box { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| background: green; |
| } |
| .outside { |
| top: 110px; |
| left: 10px; |
| } |
| .stacking-context { |
| position: fixed; |
| top: 110px; |
| left: 130px; |
| } |
| .filter { |
| width: 160px; |
| height: 160px; |
| top: 30px; |
| left: -90px; |
| backdrop-filter: invert(1); |
| background: #ff08; |
| } |
| </style> |
| |
