In the Notifications API , the Notification.requestPermission() method is called on the actual Notification constructor itself — it is a static method:

                                        
                                            let
                                            promise =
                                            Notification.
                                            requestPermission
                                            (
                                            )
                                            ;
                                        
                                    

The Notification.close() method on the other hand, is an instance method — it is called on a specific notification object instance to close the system notification it represents:

                                        
                                            let
                                            myNotification =
                                            new
                                            Notification
                                            (
                                            "This is my notification"
                                            )
                                            ;
                                            myNotification.
                                            close
                                            (
                                            )
                                            ;
                                        
                                    

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