In JavaScript , null is marked as one of the primitive values , because its behavior is seemingly primitive. However, when using the typeof operator, it returns "object" .

                                    
                                        console.
                                        log
                                        (
                                        typeof
                                        null
                                        )
                                        ;
                                        // "object"
                                    
                                

This is considered a bug , but one which cannot be fixed because it will break too many scripts.