import SwiftUI

struct ContentView: View {

    @State private var bounds: Bounds = .zero

    var body: some View {
        VStack {
            controls
            scrollArea
        }
    }

    private var controls: some View {
        HStack {
            Text(verbatim: "\(bounds)")
            Spacer()
            Button("-100") {
                withAnimation {
                    self.bounds.origin.y -= 100
                }
            }
        }
    }

    private var scrollArea: some View {
        ScrollArea(bounds: $bounds) {
            VStack {
                ForEach(0..<50) { item in
                    self.row(for: item)
                }
            }
        }
    }

    private func row(for item: Int) -> some View {
        HStack {
            Text("Item: \(item)")
                .padding([.leading, .trailing])
                .background(Color.blue)

            Spacer()
        }
    }
}