| <!doctype html> |
| <title>Animating opacity, transform, filter, backdrop-filter should establish a stacking context.</title> |
| <link rel="help" href="https://drafts.csswg.org/web-animations-1/#side-effects-section"> |
| |
| <style> |
| .shouldStack { |
| position: absolute; |
| width: 150px; |
| height: 50px; |
| background-color: red; |
| } |
| |
| .shouldNotStack { |
| position: absolute; |
| width: 150px; |
| height: 50px; |
| background-color: green; |
| } |
| |
| .child { |
| position: relative; |
| top: 0px; |
| left: 0px; |
| width: 150px; |
| height: 50px; |
| background-color: green; |
| z-index: -1; |
| } |
| |
| .shouldNotStack .child { |
| background-color: red; |
| } |
| |
| #animatedOpacity { |
| /* Use a large duration so animation is effectively invisible. */ |
| animation-duration: 100000s; |
| animation-name: opacity_frames; |
| |
| top: 0px; |
| } |
| |
| @keyframes opacity_frames { |
| to { |
| opacity: 0; |
| } |
| } |
| |
| #animatedTransform { |
| animation-duration: 100000s; |
| animation-name: transform_frames; |
| |
| top: 100px; |
| } |
| |
| @keyframes transform_frames { |
| to { |
| transform: translateX(10px); |
| } |
| } |
| |
| #animatedFilter { |
| animation-duration: 100000s; |
| animation-name: filter_frames; |
| |
| top: 200px; |
| } |
| |
| @keyframes filter_frames { |
| to { |
| filter: grayscale(50%); |
| } |
| } |
| |
| #animatedBackdrop { |
| animation-duration: 100000s; |
| animation-name: backdrop_frames; |
| |
| top: 300px; |
| } |
| |
| @keyframes backdrop_frames { |
| to { |
| backdrop-filter: grayscale(50%); |
| } |
| } |
| |
| #animatedLeft { |
| animation-duration: 100000s; |
| animation-name: left_frames; |
| |
| top: 400px; |
| } |
| |
| @keyframes left_frames { |
| to { |
| left: 10px; |
| } |
| } |
| </style> |
| |
| <div id="animatedOpacity" class="shouldStack"> |
| <div class="child">animated opacity</div> |
| </div> |
| <div id="animatedTransform" class="shouldStack"> |
| <div class="child">animated transform</div> |
| </div> |
| <div id="animatedFilter" class="shouldStack"> |
| <div class="child">animated filter</div> |
| </div> |
| <div id="animatedBackdrop" class="shouldStack"> |
| <div class="child">animated backdrop-filter</div> |
| </div> |
| <div id="animatedLeft" class="shouldNotStack"> |
| <div class="child">animated left</div> |
| </div> |
| |
