| <head> |
| <style> |
| html, body { margin:0; overflow: hidden; } |
| </style> |
| <script src="../../resources/js-test.js"></script> |
| </head> |
| |
| <div>This tests that a usually overflow: hidden viewport should be scrollable when scaled. Otherwise, you can't get to content |
| you would have been able to get to had you not been zoomed it.</div> |
| <div id="console"></div> |
| |
| <div style='font-size:40px; height: 1000px;'> |
| </div> |
| |
| <script> |
| window.addEventListener('load', function() { |
| if (!window.testRunner) { |
| debug("This test only works in the test runner."); |
| return; |
| } |
| |
| jsTestIsAsync = true; |
| |
| // Force a layout. |
| document.body.offsetLeft; |
| |
| if (window.internals) |
| window.internals.setPageScaleFactor(2, 0, 0); |
| |
| // Note that with CSSOMViewScrollingAPI enabled, the HTML body is potentially scrollable. |
| // Hence document.scrollingElement is null and we can't use document.body.scrollTop to |
| // retrieve the vertical scroll offset of the viewport. |
| // See https://drafts.csswg.org/cssom-view/#potentially-scrollable, |
| // https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement |
| // and https://drafts.csswg.org/cssom-view/#dom-element-scrolltop |
| shouldBe("window.scrollY", "0"); |
| |
| document.body.onscroll = function() { |
| shouldBe("window.scrollY", "100"); |
| finishJSTest(); |
| } |
| |
| if (window.eventSender) { |
| eventSender.mouseMoveTo(100, 100); |
| eventSender.mouseScrollBy(0, -5); |
| } |
| }); |
| </script> |
