| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>JS janking CSS transition</title> |
| |
| <style> |
| html { |
| font-family: sans-serif; |
| } |
| |
| .box { |
| background: green; |
| position: relative; |
| width: 100px; |
| height: 100px; |
| -webkit-transition: -webkit-transform 10s linear; |
| transition: transform 10s linear; |
| |
| /* Adding these lines fixes the issue |
| -webkit-transform: translate3d(0, 0, 0); |
| transform: translate3d(0, 0, 0); |
| */ |
| } |
| </style> |
| </head> |
| <body> |
| <div class="box"></div> |
| <button class="run">Run</button> |
| <script> |
| function jankify() { |
| var start = Date.now(); |
| while (Date.now() - start < 250); |
| setTimeout(jankify, 750); |
| } |
| |
| var box = document.querySelector('.box'); |
| |
| window.addEventListener('load', function() { |
| box.style.transform = box.style.WebkitTransform = 'translate3d(500px, 0, 0)' |
| jankify(); |
| }); |
| </script> |
| </body> |
| </html> |
