Dynamic Island header is a React component made that looks like Dynamic Island on new Iphones. When you hover over it, it simply expands to display more content such as links or buttons. 

The Live demo is just a preview to show how this can be used. This code doesnt include the styling for dark mode, all the shorcuts etc. Only the dynamic Island header component

Also there might be issue where sometimes it shows the elements in the header when not hovering when you hover away from browser to other app or menubar.