Why is typeof null “object”?

Question

I\'m reading \'Professional Javascript for Web Developers\' Chapter 4 and it tells me that the five types of primitives are: undefined, null, boolean, number and string.

Answer 1

In JavaScript, typeof null is 'object', which incorrectly suggests that null is an object. This is a bug and one that unfortunately can't be fixed, because it would break existing code.

Answer 2

For people who interested in some code that made this behaviour this is the link for you guys....

why typeof null is object with the implementation