在MDN网站中，为什么说Object.prototype继承自Function.prototype

Question

I understand that Object.prototype. proto = null being end of the chain (so says the browsers console).

In MDN site, at the Object.prototype page: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/prototype

At the bottom of the page, under "Inheritance:" you will see "Function" with expandable properties & method underneath. To my understanding it says Object.prototype inherits methods such as Function.prototype.bind() etc

I can understand the Object constructor function shares the non-prototypal property/method (such as caller property) as it is constructed by the Function constructor fn. But how does Object.prototype inherit from Function.prototype while Object.prototype. proto is null?

Can someone shed a light please?

Answer 1

It's referring to what the Object constructor inherits from, not object instances. All constructors are functions, so the Object function itself inherits from Function.prototype .

When you see the notice down a bit on the page that says:

Properties inherited from Function: arity, caller, constructor, length, name

It's easier to understand what was meant by that -- it's referring to how properties such as Object.constructor and Object.length have been inherited from Function .

Anyway, it is true that Object.prototype.__proto__ === null -- Object.prototype does not inherit from Function.prototype at all, as you had thought.