Javascript Private Members

Javascript does not have special syntax for private members however they can be implement by using closure in object constructor and using wrap function in object literal. Examples below shows how private members can be implemented.

Example 1. Object Constructor

function Grocery(){

    //private

    var type='fruit';

    

    //public

    this.getType=function(){

        return type;

    }

}

var orange=new Grocery();

alert(orange.type); //undefined

alert(orange.getType()); //fruit

Example 2. Object Literal

var orange;

(function(){

    //private

    var type="fruit";

    

    //public

    orange={

        getType:function(){

            return type;

        }

    };

}());

alert(orange.getType());//fruit