I guess overscroll-behavior is not supported or broken for GTK/WPE, so we should enable it by default only for other ports at least for now.
Good catch. for WinCairo WK2, too.
The root html element's style attribute has "overscroll-behavior-y: none;". If I disable this property with Web Inspector, WinCairo can scroll with the mouse wheel. However, in Mac MiniBrowser, the root html element's style attribute doesn't have "overscroll-behavior-y: none;". Is this a GTK/WPE/WinCairo bug?
(In reply to Fujii Hironori from comment #2) > However, in Mac MiniBrowser, the root html element's style attribute doesn't > have "overscroll-behavior-y: none;". > Is this a GTK/WPE/WinCairo bug? This is my mistake. Because it's still a experimental feature, I need to enable it. After enabling it, the root html element's style attribute has "overscroll-behavior-y: none;", and Mac MiniBrowser can scrool the page with mouse wheel.
Created attachment 453020 [details] test case (root element with overscroll-behavior-y:none)
Created attachment 453037 [details] Patch
Committed r290417 (247725@main): <https://commits.webkit.org/247725@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 453037 [details].