| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| body { |
| height: 5000px; |
| background-image: repeating-linear-gradient(transparent, silver 500px); |
| } |
| </style> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script src="../../../resources/js-test.js"></script> |
| <script> |
| jsTestIsAsync = true; |
| |
| description('When canceling an animated scroll, we should not trigger a scroll from zero.'); |
| window.addEventListener('load', async () => { |
| const startingScrollOffset = 400; |
| window.scrollTo(0, startingScrollOffset); |
| |
| window.addEventListener('scroll', () => { |
| if (window.scrollY < startingScrollOffset) |
| testFailed(`We should never see a scroll offset less than ${startingScrollOffset} - saw ${window.scrollY}`); |
| }, false); |
| |
| setTimeout(() => { |
| window.scrollTo({ top: 500, behavior: 'smooth' }); |
| }, 10); |
| |
| await UIHelper.startMonitoringWheelEvents(); |
| |
| setTimeout(() => { |
| window.scrollTo({ top: 520, behavior: 'smooth' }); |
| }, 60); |
| |
| await UIHelper.waitForScrollCompletion(); |
| finishJSTest(); |
| |
| }, false); |
| </script> |
| </head> |
| <body> |
| <div class="scroller"> |
| <div class="content"></div> |
| </div> |
| <div id="console"></div> |
| </body> |
| </html> |
