| <!DOCTYPE html> |
| <pre id="mainThreadScrollingReasons"></pre> |
| |
| <iframe id="iframe" src="resources/background-attachment-fixed.html"></iframe> |
| |
| <div style="height: 2000px;"> |
| </div> |
| |
| <script> |
| function scrollingLocationAndReasons(reasons) { |
| return reasons ? "scrolls on main: " + reasons : "scrolls on impl"; |
| } |
| |
| if (window.internals) |
| internals.settings.setThreadedScrollingEnabled(true); |
| |
| if (window.testRunner) |
| testRunner.dumpAsText(true); |
| |
| window.addEventListener('load', function() { |
| reasons = internals.mainThreadScrollingReasons(document); |
| text = "Main frame " + scrollingLocationAndReasons(reasons); |
| text += "\nThe iFrame scrolls on main thread, reasons: " + document.getElementById("iframe").contentDocument.getElementById("mainThreadScrollingReasons").innerText; |
| document.getElementById("mainThreadScrollingReasons").innerText = text; |
| }); |
| </script> |
