my prefered prototype inheritance pattern

index.js

// Code goes here

function Animal(){
  this.type = 'abstract';
  
  this.sayGoodbye = function(){
    return 'goodbye';
  }
}

Animal.hasFur = false;

function Dog(){
  
}

// Dog.prototype = new Animal();

_.extend(Dog, Animal);
Dog.prototype = new Animal();


Dog.prototype.sayHi = function(){ return 'woof' }



var dog = new Dog();

console.log('this is type',dog.type);
console.log('goodbye', dog.sayGoodbye());
console.log('hi', dog.sayHi());

console.log(Dog.hasFur);