| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| body { |
| margin: 0; |
| } |
| .backdrop { |
| position: fixed; |
| top: 10px; |
| left: 10px; |
| width: 500px; |
| height: 300px; |
| background-color: silver; |
| } |
| |
| .container { |
| position: relative; |
| top: 20px; |
| left: 20px; |
| width: 480px; |
| height: 280px; |
| border: 1px solid black; |
| padding: 10px; |
| box-sizing: border-box; |
| } |
| |
| .header { |
| position: relative; |
| z-index: 1; |
| overflow: hidden; |
| width: 460px; |
| height: 260px; |
| background-color: lightblue; |
| } |
| |
| .target { |
| position: relative; |
| top: 10px; |
| left: 10px; |
| width: 200px; |
| height: 100px; |
| background-color: green; |
| } |
| |
| .animating { |
| position: relative; |
| background-color: orange; |
| top: auto; |
| left: 250px; |
| width: 180px; |
| height: 100px; |
| opacity: 0.6; |
| transition: opacity 500s; |
| padding: 10px; |
| } |
| |
| .animating.changed { |
| opacity: 1; |
| top: 20px; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| window.addEventListener('load', () => { |
| setTimeout(() => { |
| document.querySelector('.animating').classList.add('changed'); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div class="backdrop"></div> |
| <div class="container"> |
| <div class="header"> |
| <div class="target"></div> |
| <div class="animating"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
