SwiftUI pattern for scroll-view conditional on macOs and iOs

ScrollViewUI.swift

// Conditional compile for macOs and iOS code.

ScrollViewReader { scrollView in
    ScrollView {
        List {
            ForEach(items, id: \.self) { item in
                Text(item)
            }
        }
        .onChange(of: selectedItem) { newValue in
            #if os(iOS)
            scrollView.scrollTo(newValue, anchor: .center)
            #elseif os(macOS)
            scrollView.scrollTo(newValue)
            #endif
        }
    }
}