| <!DOCTYPE html> |
| <title>Scrollbar forward button must not scroll ancestor</title> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script src="../../../resources/gesture-util.js"></script> |
| <style> |
| .subscroller { |
| width:100px; |
| height:100px; |
| overflow:auto; |
| position:absolute; |
| top:0px; |
| left:0px; |
| } |
| .subscroller>.child { |
| height:400px; |
| } |
| .talldiv { |
| height:4000px; |
| } |
| </style> |
| |
| <div class="subscroller"> |
| <div class="child">subscroller</div> |
| </div> |
| <div class="talldiv">talldiv</div> |
| |
| <script> |
| |
| let clicks = 0; |
| window.addEventListener("click", e => clicks++); |
| |
| promise_test(async () => { |
| // Ensure the page is ready to receive input. |
| await waitForCompositorCommit(); |
| |
| // Tap on the top of the scrollbar - this shouldn't scroll and no |
| // click should be fired. |
| await touchTapOn(95, 5); |
| assert_equals(clicks, 0, "Tapping on the top of scrollbar that doesn't scroll " + |
| "must not fire a click event"); |
| |
| // Tap on the bottom of the scrollbar - this should scroll and no click |
| // event should be fired. |
| await touchTapOn(95, 95); |
| assert_equals(clicks, 0, "Tapping on bottom of scrollbar that does scroll " + |
| "must not fire a click event"); |
| }, "Tapping a scrollbar part that doesn't scroll should not fire a click event"); |
| </script> |
