| <!DOCTYPE html> |
| <html> |
| <title>Missing properties in first keyframe</title> |
| <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1"> |
| <link rel="help" href="https://www.w3.org/TR/web-animations-1/#the-effect-value-of-a-keyframe-animation-effect"> |
| <meta name="assert" |
| content="CSS animation correctly interpolates from neutral keyframe"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/web-animations/testcommon.js"></script> |
| <style type="text/css" media="screen"> |
| body { |
| margin: 0; |
| } |
| |
| .box { |
| position: relative; |
| width: 100px; |
| height: 100px; |
| left: 0; |
| background-color: green; |
| } |
| |
| #box1 { |
| left: 200px; |
| animation: move-left 2s paused linear; |
| } |
| |
| #box2 { |
| transform: translateX(200px); |
| animation: move-transform 2s paused linear; |
| } |
| |
| @keyframes move-left { |
| 0% { |
| opacity: 1; |
| } |
| 25% { |
| opacity: 1; |
| } |
| 50% { |
| left: 0; |
| opacity: 1; |
| } |
| 100% { |
| left: 0; |
| opacity: 0; |
| } |
| } |
| |
| @keyframes move-transform { |
| 0% { |
| opacity: 1; |
| } |
| 25% { |
| opacity: 1; |
| } |
| 50% { |
| transform: translateX(0); |
| opacity: 1; |
| } |
| 100% { |
| transform: translateX(0); |
| opacity: 0; |
| } |
| } |
| </style> |
| <body> |
| <div class="box" id="box1"></div> |
| <div class="box" id="box2"></div> |
| </body> |
| <script> |
| promise_test(async t => { |
| document.getAnimations().forEach(anim => { |
| anim.currentTime = 500; |
| }); |
| assert_equals(getComputedStyle(box1).left, "100px"); |
| assert_matrix_equals( |
| getComputedStyle(box2).transform, |
| 'matrix(1, 0, 0, 1, 100, 0)'); |
| }, 'Missing property values in the first keyframe are correctly ' + |
| 'interpolated from a neutral keyframe value'); |
| </script> |
| </html> |
