| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>backdrop-filter: Basic operation of filter with opacity</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-basic-opacity-2-ref.html"> |
| |
| <div> |
| <p>Expected: Just a single grey box.</p> |
| </div> |
| <div class="box colorbox"></div> |
| <div class="box filterbox"></div> |
| |
| <style> |
| .box { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| left: 10px; |
| top: 100px; |
| } |
| .colorbox { |
| background: green; |
| } |
| .filterbox { |
| backdrop-filter: invert(1); |
| opacity: 0.5; |
| /* An invert backdrop-filter with opacity 0.5 should always give a grey |
| result. It will always mix the background color with its inverse, in |
| equal proportion.*/ |
| } |
| </style> |
| |
