| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| |
| div { |
| left: 0; |
| top: 0; |
| position: absolute; |
| height: 100px; |
| } |
| |
| .mask { |
| /* We add an extra pixel to account for rounding errors */ |
| width: 51px; |
| background-color: red; |
| } |
| |
| #target { |
| width: 100px; |
| background-color: black; |
| } |
| |
| #right { |
| left: 149px; |
| } |
| |
| </style> |
| </head> |
| <body> |
| |
| <div id="target"></div> |
| <div id="left" class="mask"></div> |
| <div id="right" class="mask"></div> |
| |
| <script> |
| |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| const animation = document.getElementById("target").animate({ |
| transform: ["translateX(100px)", "none"] |
| }, { duration: 10000, delay: 1000 }); |
| |
| requestAnimationFrame(() => { |
| animation.pause(); |
| animation.currentTime = 6000; |
| if (window.testRunner) { |
| requestAnimationFrame(() => { |
| requestAnimationFrame(() => testRunner.notifyDone()) |
| }); |
| } |
| }); |
| |
| </script> |
| </body> |
| </html> |
