Checking Instance of a Constructor Function
In this example, person1 is an instance of the Person constructor function, and it's also considered an instance of the base Object constructor.
Checking Instance of Custom Objects
Here, car1 is an instance of the Car constructor but not of the Array constructor.
Inheritance and Instanceof
In this example, dog1 is an instance of both Dog and Animal constructors because of the prototype chain.
Checking Inheritance with Primitives
For primitives like numbers, strings, and booleans, the instanceof operator generally returns false because they are not objects, despite having corresponding wrapper objects like Number, String, and Boolean.
It's important to note that the instanceof operator only works with objects and constructor functions, not with primitive values. Additionally, it relies on the prototype chain, so if you're dealing with complex inheritance structures, make sure to consider how prototypes are set up.