| <!DOCTYPE html> <!-- webkit-test-runner [ useFlexibleViewport=true AsyncOverflowScrollingEnabled=true ] --> |
| <html> |
| <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> |
| <head> |
| <script src="../../../../resources/js-test.js"></script> |
| <script src="../../../../resources/ui-helper.js"></script> |
| <style> |
| html, body { |
| width: 100%; |
| height: 100%; |
| margin: 0; |
| } |
| |
| #scroller { |
| overflow: scroll; |
| width: 200px; |
| height: 200px; |
| border: 2px solid black; |
| } |
| |
| #content { |
| width: 100%; |
| height: 1000px; |
| } |
| </style> |
| <script> |
| jsTestIsAsync = true; |
| |
| async function runTest() { |
| description("Verifies that calling preventDefault() on touchstart prevents scrolling when the touch event handler is unresponsive for an extended duration. To manually test, attempt to scroll the box; check that touchstart and touchend events were handled, and that the box did not scroll."); |
| |
| const scroller = document.getElementById("scroller"); |
| |
| scroller.addEventListener("touchstart", event => { |
| const startTime = Date.now(); |
| while (1) { |
| if (Date.now() - startTime > 400) |
| break; |
| } |
| testPassed("Observed touchstart event"); |
| event.preventDefault(); |
| }); |
| |
| scroller.addEventListener("touchend", () => { |
| testPassed("Observed touchend event"); |
| finishJSTest(); |
| }); |
| scroller.addEventListener("scroll", () => testFailed("Observed scroll event"), { once : true }); |
| |
| if (!window.testRunner) |
| return; |
| |
| const eventStreamData = new UIHelper.EventStreamBuilder() |
| .begin(100, 190) |
| .move(100, 10, 1) |
| .move(100, 190, 1) |
| .move(100, 100, 0.5) |
| .end() |
| .takeResult(); |
| |
| await UIHelper.sendEventStream(eventStreamData); |
| } |
| |
| addEventListener("load", runTest); |
| </script> |
| </head> |
| <body> |
| <div id="scroller"> |
| <div id="content"></div> |
| </div> |
| <pre id="description"></pre> |
| <pre id="console"></pre> |
| </body> |
| </html> |
