Encapsulation in JS | Chinese Rule of Eight

ref – https://abdulapopoola.com/2013/03/30/static-and-instance-methods-in-javascript/

var Person = function (name, age){

//private properties

var priv = {};

//Public properties

this.name = name;

this.age = age;

//Public methods

this.sayHi = function(){

alert('hello');

}

// A static method; this method only

// exists on the class and doesn't exist

// on child objects

Person.sayName = function() {

alert("I am a Person object ;)");

};

// An instance method;

// All Person objects will have this method

Person.prototype.setName = function(nameIn) {

this.name = nameIn;

}

// Tests

var per = new Person('John Doe', 22);

//Shows alert

Person.sayName();

//TypeError: Object [object Object] has no method 'sayName'

per.sayName()

//Show alert

per.sayHi();

//John Doe

per.name;

//22

per.age;

per.setName('Jane Doe');

//Jane Doe

per.name;