Wrap a SwiftUI View in a ScrollView, expanding to full height/width & preventing bouncing when possible (iOS > = 16.4)

ScrollViewThatFits.swift

import SwiftUI

/// Wraps the content in a ScrollView that only bounces
/// if the content size exceeds the visible area;
/// and makes the content fill the ScrollView if desired.
/// Per default, the content fills the ScrollView only 
/// vertically.
///
/// Usage:
///
/// ```
/// ScrollViewThatFits {
///   VStack {
///     // Your views here...
///   }
/// }
/// ```
/// Discussion here: https://x.com/manuelmaly/status/1763514873760137506?s=61
/// 
/// Heavily inspired by
/// https://x.com/alpennec/status/1762396898168656107?s=20
/// and
/// https://x.com/mecid/status/1762378791295254808?s=20
public struct ScrollViewThatFits<Content: View>: View {
  var fillScrollView: Axis.Set
  var edgesIgnoringSafeArea: Edge.Set
  var content: () -> Content
  
  public init(
    edgesIgnoringSafeArea: Edge.Set = Edge.Set(),
    fillScrollView: Axis.Set = .vertical,
    @ViewBuilder content: @escaping () -> Content
  ) {
    self.edgesIgnoringSafeArea = edgesIgnoringSafeArea
    self.fillScrollView = fillScrollView
    self.content = content
  }
  
  public var body: some View {
    GeometryReader { proxy in
      ScrollView {
        content()
          .frame(
            minWidth: fillScrollView.contains(.horizontal) ? proxy.size.width : nil,
            minHeight: fillScrollView.contains(.vertical) ? proxy.size.height : nil
          )
      }.scrollBounceBehavior(.basedOnSize)
    }
    .edgesIgnoringSafeArea(edgesIgnoringSafeArea)
  }
}