| <!DOCTYPE html> |
| <html style="reftest-wait"> |
| <head> |
| <style> |
| #target { |
| width: 100px; |
| height: 100px; |
| background: green; |
| margin: 300px; |
| } |
| </style> |
| </head> |
| <body> |
| <div id="target"></div> |
| <div style="height: 1000px"></div> |
| <script> |
| function scrollBy(y) { |
| return new Promise(resolve => { |
| addEventListener("scroll", () => { |
| requestAnimationFrame(() => { |
| requestAnimationFrame(resolve); |
| }); |
| }, { once: true, capture: true }); |
| document.documentElement.scrollBy({ |
| top: y, |
| behavior: "instant" |
| }); |
| }); |
| } |
| addEventListener("load", async () => { |
| await scrollBy(200); |
| document.documentElement.classList.remove("reftest-wait"); |
| }); |
| </script> |
| </body> |
| </html> |
