| <!doctype html> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <style> |
| </style> |
| <h1>Viewport: scrollingElement scroll properties inert</h1> |
| <h4> |
| Test Description: This test checks that when the scroll properties are used |
| on the scrollingElement, they delegate to the layout viewport only. |
| </h4> |
| <script> |
| addEventListener("load", function() { |
| if (!window.internals) |
| return; |
| |
| // Zoom into the page, innerWidth and innerHeight shouldn't be affected. |
| internals.setPageScaleFactor(2); |
| internals.setVisualViewportOffset(0, 0); |
| |
| test(function() { |
| // Try scrollTo(). Since the page has no overflow, the only |
| // scroll possible is by panning the visual viewport. However, |
| // scrollingElement.scrollTo should apply only to the layout |
| // viewport, so make sure the visual viewport isn't affected. |
| document.scrollingElement.scrollTo(1000, 1000); |
| assert_equals(window.visualViewport.offsetLeft, 0); |
| assert_equals(window.visualViewport.offsetTop, 0); |
| }, "visualViewport not affected by scrollingElement.scrollTo"); |
| |
| test(function() { |
| // Try the same this for scrollBy. |
| document.scrollingElement.scrollBy(1000, 1000); |
| assert_equals(window.visualViewport.offsetLeft, 0); |
| assert_equals(window.visualViewport.offsetTop, 0); |
| }, "visualViewport not affected by scrollingElement.scrollBy"); |
| |
| test(function() { |
| // And finally, scroll(). (which is an alias for scrollTo). |
| document.scrollingElement.scroll(1000, 1000); |
| assert_equals(window.visualViewport.offsetLeft, 0); |
| assert_equals(window.visualViewport.offsetTop, 0); |
| }, "visualViewport not affected by scrollingElement.scroll"); |
| |
| test(function() { |
| // Ensure that setting scrollLeft and scrollTop doesn't affect |
| // the visual viewport. |
| document.scrollingElement.scrollLeft = 100; |
| document.scrollingElement.scrollTop = 100; |
| assert_equals(window.visualViewport.offsetLeft, 0); |
| assert_equals(window.visualViewport.offsetTop, 0); |
| |
| // Ensure scrollLeft and scrollTop don't report visual viewport |
| // offset. |
| internals.setVisualViewportOffset(200, 200); |
| assert_equals(document.scrollingElement.scrollLeft, 0); |
| assert_equals(document.scrollingElement.scrollTop, 0); |
| }, "scrollLeft and scrollTop are layout-viewport relative"); |
| }); |
| </script> |
