Factory Pattern Example

FactoryPattern.js

class IceCreamFactory {
  constructor() {
    this.createIcecream = function(flavor) {
      let iceCream;
      if (flavor === 'chocolate'){
          iceCream = new Chocolate();
      }  
      else if (flavor === 'mint'){
          iceCream = new Mint();
      } 
      else if (flavor === 'strawberry'){
          iceCream = new Strawberry();
      }
      return iceCream;
    };
  }
}

class Chocolate {
  constructor() {
    this.icecreamFlavor = "chocolate";
    this.message = function() {
      return `You chose the ${this.icecreamFlavor} flavor.`;
    };
  }
}

class Mint {
  constructor() {
    this.icecreamFlavor = "mint";
    this.message = function() {
      return `You chose the ${this.icecreamFlavor} flavor.`;
    };
  }
}

class Strawberry{
  constructor() {
    this.icecreamFlavor = "strawberry";
    this.message = function() {
      return `You chose the ${this.icecreamFlavor} flavor.`;
    };
  }
}

// creating objects
const iceCreamfactory = new IceCreamFactory();

const chocolate = iceCreamfactory.createIcecream('chocolate');
const mint = iceCreamfactory.createIcecream('mint');
const strawberry = iceCreamfactory.createIcecream('strawberry');

console.log(chocolate.message()); 
console.log(mint.message()); 
console.log(strawberry.message());