| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| .container { |
| margin: 50px; |
| height: 300px; |
| width: 300px; |
| border: 1px solid black; |
| perspective: 500px; |
| } |
| |
| .intermediate { |
| width: 100%; |
| height: 100%; |
| transform: translateX(0); |
| transform-style: flat; |
| } |
| |
| .intermediate.changed { |
| transform-style: preserve-3d; |
| } |
| |
| .transformed { |
| width: 100%; |
| height: 100%; |
| background-color: blue; |
| transform: rotateY(45deg); |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| window.addEventListener('load', () => { |
| setTimeout(() => { |
| document.querySelector('.intermediate').classList.add('changed'); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }, 0); |
| |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div class="container"> |
| <div class="intermediate"> |
| <div class="transformed"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
