CODE EXAMPLE FOR JAVASCRIPT

popup alert in flutter

  showPopUp(context){
    showDialog<String>(
      context: context,
      builder: (BuildContext context) => AlertDialog(
        title: const Text('AlertDialog Title'),
        content: const Text('AlertDialog description'),
        actions: <Widget>[
          TextButton(
            onPressed: () => Navigator.pop(context, 'Cancel'),
            child: const Text('Cancel'),
          ),
          TextButton(
            onPressed: () => Navigator.pop(context, 'OK'),
            child: const Text('OK'),
          ),
        ],
      ),
    );
  }