javascript - Is Object.prototype an object and is prototype somehow not? -

when type object.prototype chrome console displays object{}

if assign variable var proto = object.prototype displays object{}

but if check it's prototype

var proto = object.prototype proto.prototype; 

if proto object{} , proto.prototype undefined means thatobject() is object() doesn't inherit anything?

also, same object.prototype.prototype?

if object has prototype, prototype object. these objects chain until reach null, end of prototype chain.

// object constructor object.prototype; // object {}, prototype of `new object`s // object.prototype object object.getprototypeof(object.prototype); // null, @ end of chain 

you should note, however, can't keep accessing obj.prototype property, applicable constructors, consider

function foo() { } foo.prototype; // foo {} // vs (new foo).prototype; // undefined 

the correct way find prototype of object using object.getprototypeof(obj),

object.getprototypeof(new foo) === foo.prototype; // true 

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it may of note legacy browsers may not support object.getprototypeof, in case many offer property obj.__proto__. however, try avoid using __proto__ outside of shim such browsers if need access prototype chain.

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finally, using new constructor isn't way create chain, can set them using object.create

var = object.create(null),     b = object.create(a), // b inherit     c = object.create(b); // c inherit b, hence a.foo = 'foo'; b.bar = 'bar';  instanceof object; // false  a.bar; // undefined c.foo + c.bar === 'foobar'; // true 

also consider

c.prototype; // undefined // vs object.getprototypeof(c) === b; // true