[Webkit-unassigned] [Bug 191322] [css-overflow][css-backgrounds] miscalculating gesture to reach true end of scrollbox when border-width not set to zero in scrolling dimension

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191322

--- Comment #1 from jonjohnjohnson <hi at jonjohnjohnson.com> ---
I put more elbow grease into isolating the bug to being from a scroller having a border-width set to any length in the same axis of scrolling.

Here is an replacement (and more concise) test case:
https://jsfiddle.net/9v514o37/

Four scrollers provided, that scroll in the dimension to see lined pattern move through view. Whether horizontal or vertical, reaching the "scrollend" position is chunky and requires extra effort on macOS STP when scrolling in the dimension that also has a border-width value. See the major difference in effort when scrolling blocks that do not have border in that dimension.

Sorry for not isolating as well or even correctly with the first test case. Completely ignore that in light of this comment.

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