Why does typeof function return “function”?

Question

If both array and function are object subtypes, then why does typeof function return \"function\" and typeof array return \"obje

Answer 1

Very ugly, yet correct answer: because ECMAScript specification says so. Keep in mind that on the low level, every array is basically a mere object with "length" property.

If you want to check if given object is actually an array, use Array.isArray.

Answer 2

Because the specification defines different behaviour for typeof when it interacts with objects implementing [[Call]] (i.e. functions).