Factory Pattern with Javascript

function Sword(desc){
  this.weaponType = "Sword";
  this.metal = desc.metal || "Steel";
  this.style = desc.style || "Longsword";
  this.hasMagic = desc.hasMagic || false;
}

function Bow(desc){
  this.weaponType = "Bow";
  this.metal = desc.metal || "Wood";
  this.style = desc.style || "Longbow";
  this.hasMagic = desc.hasMagic || false;
}

function WeaponFactory () {};
WeaponFactory.prototype.makeWeapon = function(desc){
  var weaponClass = null;

  if(desc.weaponType === "Sword"){
    weaponClass = Sword;
  } else if (desc.weaponType === "Bow"){
    weaponClass = Bow;
  } else {
    return false;
  }

  return new weaponClass(desc);
}

var myWeaponFactory = new WeaponFactory();

var bladeFist = myWeaponFactory.makeWeapon({
  weaponType: "Sword",
  metal: "Dark Iron",
  style: "Scythe",
  hasMagic: true
});

document.write(bladeFist.weaponType + " of type " + bladeFist.style + " crafted from " + bladeFist.metal );

Date: 2017-11-13 10:20:00 +0000