| <!-- <!DOCTYPE html> - this test runs in quirks mode. --> |
| <style> |
| body { |
| /* Ensure the document is scrollable. */ |
| min-height: 100%; |
| padding-bottom: 100px; |
| } |
| </style> |
| |
| <script src='../../../resources/testharness.js'></script> |
| <script src='../../../resources/testharnessreport.js'></script> |
| <script src='../../../external/wpt/web-animations/testcommon.js'></script> |
| |
| <body></body> |
| |
| <script> |
| promise_test(async t => { |
| const scroller = document.scrollingElement; |
| // For simplicity, we set the timeRange such that currentTime maps directly to |
| // the value scrolled. |
| const scrollerHeight = scroller.scrollHeight - scroller.clientHeight; |
| const scrollTimeline = new ScrollTimeline( |
| { scrollSource: scroller, timeRange: scrollerHeight, orientation: 'block' }); |
| |
| // Dirty style. |
| document.body.style.background = 'red'; |
| |
| // The following should not crash, as currentTime should clean the style before |
| // resolving the scrollingElement. |
| assert_equals(scrollTimeline.currentTime, 0); |
| |
| // Now do some scrolling and make sure that the ScrollTimelines update. |
| scroller.scrollTop = 50; |
| |
| // Wait for new animation frame which allows the timeline to compute new |
| // current time. |
| await waitForNextFrame(); |
| |
| // Again, dirty style. |
| document.body.style.background = ''; |
| |
| // Once again, no crash expected. |
| assert_equals(scrollTimeline.currentTime, 50); |
| }, 'currentTime should clean style (and not crash) in quirks mode'); |
| </script> |
