console.clear();

​

function Person() {  

}

​

// Construct new object 

var p = new Person();

​

// true

console.log(p.__proto__ === Person.prototype);

​

// true

console.log(Person.prototype.__proto__ === Object.prototype);

​

var o = {};

​

// true

console.log(o.__proto__ === Object.prototype);

​

function Girl() {  

}

​

Girl.prototype = Object.create(Person.prototype);

// true

console.log(Girl.prototype.__proto__ === Person.prototype);

​

console.log(Person.constructor);

// true

console.log(Girl.constructor === Function);

​

// Best practices say reset the constructor to be itself

Girl.constructor = Girl;

​

// points to Girl function

console.log(Girl.constructor);

​

function SillyGirl() {  

}

​

SillyGirl.prototype = Object.create(Girl.prototype);

​

console.log(SillyGirl.constructor);