282347 2024-10-30 12:36:23 -0700 Setting overflow:hidden on <body> (when body is the scrolling element) will only work if Safari address bar is visible 2024-10-30 16:34:52 -0700 1 1 1 Unclassified WebKit Scrolling Safari 17 Unspecified Unspecified RESOLVED DUPLICATE 240859 P2 Normal --- 1 zouhir webkit-unassigned simon.fraser oldest_to_newest 2071683 0 zouhir 2024-10-30 12:36:23 -0700 ## Repro steps - Open https://demo-webkit-scroll-lock.glitch.me in Safari Browser ### Case a - a.1 Make sure Safari Address Bar is **visible** - a.2 Click lock scrolling button, this will add `overflow: hidden` to the body element - a.3 Try to scroll up and down ### Case b - a.1 Make sure Safari Address Bar is **HIDDEN** - a.2 Click lock scrolling button, this will add `overflow: hidden` to the body element - a.3 Try to scroll up and down ## Expected - Case a: locks scrolling / document does not scroll - Case b: locks scrolling / document does not scroll ## Actual - Case a: successful, locks scrolling / document does not scroll - Case b: fails ## Conclusion The visibility of the address bar seems to interfere with scrolling and Safari's ability to apply consistent overflow rules on the scrolling element when it's both hidden and visible. 2071757 1 simon.fraser 2024-10-30 16:34:52 -0700 *** This bug has been marked as a duplicate of bug 240859 ***