| <!DOCTYPE html> |
| <html> |
| <title>Applied opacity should not be observable via getComputedStyle</title> |
| <link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| body { |
| margin: 0; |
| } |
| div { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| background: green; |
| } |
| |
| .parent { |
| view-transition-name: parent; |
| opacity: 0.4; |
| } |
| |
| .child { |
| view-transition-name: child; |
| view-transition-group: parent; |
| top: 50px; |
| left: 50px; |
| } |
| </style> |
| <body> |
| <div class="parent"> |
| <div class="child"></div> |
| </div> |
| <script> |
| promise_test(async t => { |
| const assert_opacity = label => { |
| assert_equals(getComputedStyle(parent).opacity, "0.4", label); |
| }; |
| const parent = document.querySelector(".parent"); |
| assert_opacity("before transition"); |
| const transition = document.startViewTransition(() => { |
| assert_opacity("in update callback"); |
| }); |
| await transition.ready; |
| assert_opacity("when ready"); |
| await transition.finished; |
| assert_opacity("when finished"); |
| }); |
| </script> |
| </body> |
