JavaScript Extending Class

Question

I have a base class:

function Monster() {
  this.health = 100;
}

Monster.prototype.growl = function() {
  console.log(\"Grr!\");
}

That

Answer 1

the absolutely minimal (and correct, unlike many of the answers above) version is:

function Monkey(param){
  this.someProperty = param;
}
Monkey.prototype = Object.create(Monster.prototype);
Monkey.prototype.eatBanana = function(banana){ banana.eat() }

That's all. You can read here the longer explanation