public Task <string> EvaluateJavascript(string script)
 {
     if (IsDead(out var v))
     {
         return(null);
     }
     WebView.LoadUrl("javascript:JsInterface.Run(" + script + ")");
     return(WebView.JavascriptInterface.TaskSource.Task);
 }
 public Task <string> EvaluateJavascript(string script)
 {
     WebView.LoadUrl("javascript:JsInterface.Run(" + script + ")");
     return(WebView.JavascriptInterface.TaskSource.Task);
 }