| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| body { |
| margin: 0; |
| } |
| |
| #scroller { |
| position: relative; |
| z-index: 0; |
| width: 400px; |
| height: 400px; |
| margin: 20px; |
| overflow: scroll; |
| padding: 20px; |
| border: 30px solid orange; |
| box-sizing: border-box; |
| border-radius: 80px 200px; |
| background-color: silver; |
| } |
| |
| .negative { |
| position: absolute; |
| top: 20px; |
| left: 30px; |
| z-index: -1; |
| padding: 20px; |
| background-color: gray; |
| transform: translateZ(0); |
| } |
| |
| .contents { |
| height: 1000px; |
| background: linear-gradient(green, blue); |
| } |
| |
| .masker { |
| position: absolute; |
| top: 49px; |
| left: 49px; |
| width: 342px; |
| height: 342px; |
| box-sizing: border-box; |
| border: 3px solid gray; |
| border-radius: 49px 170px; |
| } |
| </style> |
| <script> |
| window.addEventListener('load', () => { |
| scroller.scrollTo(0, 250); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div id="scroller"> |
| <div class="negative"></div> |
| <div class="contents"></div> |
| </div> |
| <div class="masker"></div> |
| </body> |
| </html> |
| |
