Javascript inheritance example.

inharitance-example.js

/**
 * Javascript inheritance example.
 */

// Parent class
function ParentClass() {
    this.foo = 'foo';
};

ParentClass.prototype = {
    bar: function() {
        console.log('Hello from ParentClass!');
    }
};

// Child class
function ChildClass() {

};

// Extend parent class
ChildClass.prototype = new ParentClass();
ChildClass.prototype.constructor = ChildClass;
// Shortcut to parent class
ChildClass.prototype.super = ParentClass.prototype;

// Overwrite parent method
ChildClass.prototype.bar = function() {
    // Call parent method first
    this.super.bar.call(this);

    console.log('Hello from ChildClass!');
};