ViewController.swift

extension NativeInvokeJavaScriptBrowserViewController: WKNavigationDelegate {
  func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    switch requestJavaScriptMethod!
    {
      case "SayHelloTo":
        wkWebView.evaluateJavaScript("sayHelloTo('Lien')")
      
      case "SayHelloToWithReply":
        wkWebView.evaluateJavaScript("sayHelloToWithReply('Lien')") { (any,error) -> Void in
          print("\(any as! String)")
        }
      
      default:
        wkWebView.evaluateJavaScript("sayHello()")
    }
  }
}