| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta name="viewport" content="width=device-width"> |
| <style> |
| * { |
| box-sizing: border-box; |
| } |
| |
| .container { |
| width: 200px; |
| height: 200px; |
| border: 1px solid black; |
| } |
| |
| .box { |
| width: 100px; |
| height: 100px; |
| background-color: blue; |
| } |
| |
| body.changed .box.disappear { |
| display: none; |
| } |
| |
| .composited { |
| transform: translateZ(0); |
| } |
| </style> |
| <script> |
| function applyChange() |
| { |
| document.body.classList.add('changed'); |
| } |
| </script> |
| </head> |
| <body> |
| <div class="container composited"> |
| <div class="composited disappear box">box</div> |
| </div> |
| </body> |
| </html> |
