Preview.swift

// Before
struct RatingsView_Previews: PreviewProvider {
  static var previews: some View {
    VStack {
      ForEach(0...5, id: \.self) { value in
        RatingsView(value: .constant(value))
      }
    }
    .previewLayout(.sizeThatFits)
  }
}

// After
#Preview(traits: .sizeThatFitsLayout) {
  VStack {
    ForEach(0...5, id: \.self) { value in
      RatingsView(value: .constant(value))
    }
  }
}