class-js

var BaseClass = createClass({
 name: '',
 url: '',
 
 /* class constructor */
 _init: function (name, url) {
 if (name) {
 this.name = name;
 }
 if (url) {
 this.url = url;
 }
 },
 
 getInfo: function () {
 return this.name + '- ' + this.url;
 }
});
var ChildClass = BaseClass.extend({
 /* class constructor */
 _init: function (name, url) {
 this._super(name, url); /* call overridden method of parent class */
 },
 
 alertInfo: function (url) {
 alert(this.getInfo());
 }
});
var baseClassObj = new BaseClass('Sujeet', 'https://github.com/sujeetkv');
var childClassObj = new ChildClass('Sujeet', 'https://github.com/sujeetkv');

var BaseClass = createClass((function () {
 /* private members */
 var delim = ': ';
 
 /* public members */
 return {
 name: '',
 url: '',
 
 _init: function (name, url) {
 if (name) {
 this.name = name;
 }
 if (url) {
 this.url = url;
 }
 },
 
 getInfo: function () {
 return this.name + delim + this.url;
 }
 };
})());
var ChildClass = BaseClass.extend((function () {
 /* private members */
 var log = function (val) {
 console.log(val);
 };
 
 /* public members */
 return {
 _init: function (name, url) {
 this._super(name, url);
 },
 alertInfo: function () {
 alert(this.getInfo());
 log(this.getInfo());
 }
 };
})());