EnoF

var Animal = clazz(function Animal(){
  this.private = {
    name: 'animal'
  };
  this.public = {
    sayHello: function sayHello(){
      return 'Hi, my name is ' + this.private.name + '!';
    }
  };
  

EnoF

var Animal = clazz(function Animal(){
  this.protected = {
    name: 'animal'
  };
  this.public = {
    sayHello: function sayHello(){
      return 'Hi, my name is ' + this.protected.name + '!';
    }
  };
});

EnoF

var Animal = clazz(function Animal(){
  this.private = {
    name: 'animal'
  };
  this.public = {
    sayHello: function sayHello(){
      return 'Hi, my name is ' + this.private.name + '!';
    }
  };
});

EnoF

function Animal(){}
 
Animal.prototype = {
  name: 'animal',
  sayHello: function sayHello(){
    return 'Hi, my name is ' + this.name  + '!';
  }
};
 
function Dog(){}

EnoF

var Animal = clazz(function Animal(){
  this.private = {
    name: 'animal'
  };
  this.public = {
    sayHello: function sayHello(){
      return 'Hi, my name is ' + this.private.name + '!';
    }
  };
});