Repro: https://output.jsbin.com/godago (and attached)
The scroller is covered by a transparent <div>, which should intercept all events. However, Chrome incorrectly permits it to be scrolled with the mouse wheel.
This is a bug in compositor-thread hit testing. Blink hit-tests correctly, as evidenced by clicking the scrollbar arrows.
The GraphicsLayer for the #cover element has draws_content_ == false, which might be tripping up the cc paths.
Firefox behaves correctly on this test case.
|
Deleted:
scroller-transparent-overlay.html
629 bytes
|
Comment 1 by skobes@chromium.org
, May 18 2017