I have read that the null data type in JavaScript is a primitive data type, however due to a bug or something in the first version JavaScript, null is considered to be an object.

However, let's assume that null is a real object (and not a primitive data type like it really is), what does that mean exactly, i.e. what does a data type being an object mean exactly?

For example if a data type is an object, does that mean that attributes and methods can be added to instances of that data type, while a primitive data type can't have attributes and methods added to its instances? and so the reasosn why null is really a primitive data type and not an object is because you can't add attributes and methods to its instances?