| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| body { |
| height: 5000px; |
| } |
| </style> |
| <script src="../../../resources/js-test-pre.js"></script> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script> |
| var jsTestIsAsync = true; |
| |
| let windowScrollEventCount = 0; |
| let defaultPrevented; |
| |
| async function testScroll() |
| { |
| await UIHelper.mouseWheelScrollAt(100, 100); |
| shouldBeTrue('windowScrollEventCount > 0'); |
| shouldBeFalse('defaultPrevented'); |
| finishJSTest(); |
| } |
| |
| window.addEventListener('load', () => { |
| debug('Tests that a wheel event handler on the body is passive (cannot prevent scrolling)') |
| document.body.addEventListener('wheel', (event) => { |
| event.preventDefault(); |
| defaultPrevented = event.defaultPrevented; |
| }); |
| |
| window.addEventListener('scroll', () => { |
| ++windowScrollEventCount; |
| }, false); |
| |
| setTimeout(testScroll, 0); |
| }, false); |
| </script> |
| </head> |
| <body> |
| <script src="../../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
