| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| |
| #changer { height: 1500px; } |
| #anchor { |
| width: 150px; |
| height: 4000px; |
| background-color: pink; |
| } |
| |
| </style> |
| <div id="changer"></div> |
| <div id="anchor"></div> |
| <script> |
| |
| // Test that scroll anchoring interacts correctly with scroll bounds clamping: |
| // There should be no visible jump even if the content shrinks such that the |
| // new max scroll position is less than the previous scroll position. |
| |
| test(() => { |
| document.scrollingElement.scrollTop = 1600; |
| document.querySelector("#changer").style.height = "0"; |
| assert_equals(document.scrollingElement.scrollTop, 100); |
| }, "Anchoring combined with scroll bounds clamping in the document."); |
| |
| </script> |
