LazyScrollView – Before iOS 16.4 otherwise use the `scrollBounceBehavior` modifier

LazyScrollView.swift

struct LazyScrollView<Content: View>: View {

  @State private var fitsVertically = false
  @State private var fitsHorizontally = false
  private let content: Content
  private let axes: Axis.Set
  private let showsIndicators: Bool
  private var activeScrollingDirections: Axis.Set {
    return axes.intersection((fitsVertically ? [] : Axis.Set.vertical).union(fitsHorizontally ? [] : Axis.Set.horizontal))
  }

  init(_ axes: Axis.Set = .vertical, showsIndicators: Bool = true, @ViewBuilder content: () -> Content) {
    self.axes = axes
    self.showsIndicators = showsIndicators
    self.content = content()
  }

  var body: some View {
    GeometryReader { geometryReader in
      ScrollView(activeScrollingDirections, showsIndicators: showsIndicators) {
        content
          .background {
            GeometryReader {
              Color.clear.preference(key: ViewSizeKey.self, value: $0.frame(in: .local).size)
            }
          }
      }
      .onPreferenceChange(ViewSizeKey.self) {
        fitsVertically = $0.height <= geometryReader.size.height
        fitsHorizontally = $0.width <= geometryReader.size.width
      }
    }
  }
}

private struct ViewSizeKey: PreferenceKey {

  static var defaultValue: CGSize {
    return .zero
  }

  static func reduce(value: inout Value, nextValue: () -> Value) {
    let next = nextValue()
    value = CGSize(width: value.width + next.width, height: value.height + next.height)
  }
}