The sidebar example is my fault for forgetting to make the menu itself tab-accessible (ie focusing the sidebar will trigger the `:focus-within` selector rather

The sidebar example is my fault for forgetting to make the menu itself tab-accessible (ie focusing the sidebar will trigger the `:focus-within` selector rather than just focusing the links or hovering). I'll update the example so hopefully it should work. As for the sticky example, I'm really not sure what's going on there. It certainly seems to be supported. https://caniuse.com/css-sticky https://caniuse.com/css-sticky