ViewRepresentable

import SwiftUI
#if os(macOS)
import Cocoa

protocol ViewRepresentable: NSViewRepresentable {
  func makeView(context: Context) -> NSViewType
  func updateView(_ view: NSViewType, context: Context)
}
extension ViewRepresentable {
  func makeNSView(context: Context) -> NSViewType {
    makeView(context: context)
  }
  func updateNSView(_ nsView: NSViewType, context: Context) {
    updateView(nsView, context: context)
  }
}

#endif
#if os(iOS)
import UIKit

protocol ViewRepresentable: UIViewRepresentable {
  func makeView(context: Context) -> UIViewType
  func updateView(view: UIViewType, context: Context)
}
extension ViewRepresentable {
  func makeUIView(context: Context) -> UIViewType {
    makeView(context: context)
  }
  func updateUIView(_ nsView: UIViewType, context: Context) {
    updateView(uiView, context: context)
  }
}
#endif