Inheritance in Object-oriented JavaScript

Inheritance in JavaScript is called prototypal inheritance. Objects inherit from objects. When we create an object from a class,

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function MyClass() 
{
    // The class
};

var myObject = new MyClass();

function MyClass()

{

// The class

};

var myObject = new MyClass();

it always inherits from

MyClass.prototype

1	MyClass.prototype

In Java speak, this is like saying “any class inherits from Object class”.

public class MyClass extends Object {
...
}

public class MyClass extends Object {

...

}

If we point MyClass.prototype to another object, e.g., new Person(), MyClass objects now inherit from Person object.

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function Person() {
    var _name = "Default Name";

    this.getName = function() {
        return _name
    };

    this.setName = function(v) {
        _name = v;
    };
};

function Student() {

};

// Point Student.prototype to an Person object
Student.prototype = new Person();

var student = new Student();
console.log(student.getName());
student.setName("Turreta rocks!");
console.log(student.getName());