A lot of my simple demos didn't work in Safari due to a lack of the navigation API. I've hacked around that, but many of them aren't rendering properly. https://bugs.webkit.org/show_bug.cgi?id=272661 is one of the simple reduced cases, but here are others that I think are hitting different bugs: In all demos, click the "page 2" / "page 1" link. See Chrome for the correct behaviour. https://simple-set-demos.glitch.me/batman-transition/ - the background is supposed to spin, but doesn't in Safari. https://simple-set-demos.glitch.me/bounce/ - the new content is supposed to bounce in, but in Safari it moves… incorrectly. https://simple-set-demos.glitch.me/dialog/ - (click the open a dialog button) in Chrome the dialog slowly fades in, in Safari it just appears. https://simple-set-demos.glitch.me/dust-no-raf/ - the dust flickers in Safari https://simple-set-demos.glitch.me/gross-3d-transition/ - the page is supposed to move in 3d space, but doesn't in Safari https://simple-set-demos.glitch.me/gross-cube-transition/ - the page is supposed to animate as a cube https://simple-set-demos.glitch.me/simple-element-change/ - (click the toggle button) the element gets clipped in weird ways