In JavaScript, why typeof Function.prototype is “function”, not “object” like other prototype objects?

Question

console.log(typeof String.prototype); // object
console.log(typeof Number.prototype); // object
console.log(typeof Object.prototype); // object
console.log(typeof Bo         


        

Answer 1

Because function is a native object which among other properties has internal [[Construct]] and [[Call]] properties and also explicit prototype property — the reference to a prototype of the future objects. And its class is function.

F.[[Class]] = "Function"
F.[[Call]] =  // function itself

Thus [[Call]] besides the [[Class]] property (which equals to "Function") is the main in respect of objects distinguishing. Therefore the objects having internal [[Call]] property are called as functions. The typeof operator for such objects returns "function" value.

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