public final class FetchImage: ObservableObject, Identifiable {
    /// Returns the fetched image.
    ///
    /// - note: In case pipeline has `isProgressiveDecodingEnabled` option enabled
    /// and the image being downloaded supports progressive decoding, the `image`
    /// might be updated multiple times during the download.
    @Published public private(set) var image: PlatformImage?

    /// Returns an error if the previous attempt to fetch the most recent attempt
    /// to load the image failed with an error.
    @Published public private(set) var error: Error?

    /// Returns `true` if the image is being loaded.
    @Published public private(set) var isLoading: Bool = false

    /// The progress of the image download.
    @Published public var progress = Progress()
}

struct ImageView: View {
    let url: URL

    @StateObject private var image = FetchImage()

    var body: some View {
        ZStack {
            Rectangle().fill(Color.gray)
            image.view?
                .resizable()
                .aspectRatio(contentMode: .fill)
                .clipped()
        }
        .onAppear { image.load(url) }
        .onChange(of: url) { image.load($0) }
        .onDisappear(perform: image.reset)
    }
}

struct DetailsView: View {
    var body: some View {
        List(imageUrls, id: \.self) {
            ImageView(url: $0)
                .frame(height: 200)
        }
    }
}

.onAppear {
    image.priority = .normal
    image.load(url)
}
.onDisappear {
    image.priority = .low
}

struct ImageView: View {
    let url: URL

    @StateObject private var image = FetchImage()

    var body: some View {
        // ... create image view 
        .onAppear {
            // Ensure that memory cache lookup is performed without animations
            withoutAnimation {
                image.load(url)
            }
        }
        .onDisappear(perform: image.reset)
        .animation(.default)
    }
}

private func withoutAnimation(_ closure: () -> Void) {
    var transaction = Transaction(animation: nil)
    transaction.disablesAnimations = true
    withTransaction(transaction, closure)
}