| <!DOCTYPE html> |
| <title>Reference for Web Animation with scroll timeline tests</title> |
| <style> |
| #box { |
| width: 100px; |
| height: 100px; |
| background-color: green; |
| transform: translate(0, 100px); |
| opacity: 0.5; |
| will-change: transform; /* force compositing */ |
| } |
| |
| #covered { |
| width: 100px; |
| height: 100px; |
| background-color: red; |
| } |
| |
| #scroller { |
| overflow: auto; |
| height: 100px; |
| width: 100px; |
| will-change: transform; /* force compositing */ |
| } |
| |
| #contents { |
| height: 1000px; |
| width: 100%; |
| } |
| </style> |
| |
| <div id="box"></div> |
| <div id="covered"></div> |
| <div id="scroller"> |
| <div id="contents"></div> |
| </div> |
| |
| <script> |
| window.addEventListener('load', function() { |
| // Move the scroller to halfway. |
| const scroller = document.getElementById("scroller"); |
| const maxScroll = scroller.scrollHeight - scroller.clientHeight; |
| scroller.scrollTop = 0.5 * maxScroll; |
| }); |
| </script> |
