| <!DOCTYPE html> |
| <title> Removing Wheel Target in Event Handler </title> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script src="../../../resources/gesture-util.js"></script> |
| |
| <style> |
| div { |
| margin: 0px; |
| padding: 0px; |
| } |
| #outer { |
| width: 500px; |
| height: 500px; |
| overflow: scroll; |
| } |
| #inner { |
| width: 1000px; |
| height: 1000px; |
| } |
| </style> |
| |
| <div id="outer"> |
| <div id="inner"> |
| </div> |
| </div> |
| |
| <script> |
| let outer = document.getElementById("outer"); |
| |
| function detachWheelTarget(e) { |
| e.preventDefault(); |
| outer.parentNode.removeChild(outer); |
| } |
| |
| outer.addEventListener("wheel", detachWheelTarget); |
| |
| promise_test(async(t) => { |
| let bounds = outer.getBoundingClientRect(); |
| let x = bounds.x + 100, y = bounds.y + 100; |
| await mouseMoveTo(x, y); |
| await smoothScroll(40, x, y, GestureSourceType.MOUSE_INPUT, 'downright', SPEED_INSTANT); |
| await new Promise( (resolve) => { |
| t.step_timeout(resolve, 10); |
| }); |
| }, "Test verify that detaching a wheel target during handling the event" + |
| "will not crash the renderer."); |
| </script> |
