OOP

oop.js

class Guitar {
  constructor(args) {
    this.name = args.name;
    this.stringsCount = args.stringsCount || 6;
  }

  play() {
    console.log("lalala");
  }
}

class BassGuitar extends Guitar {
  constructor(bassArgs) {
    super(bassArgs);
    this.stringsCount = 4;
  }

  slap() {
    console.log("yey baby");
  }
}

//

const gipsone = new Guitar({
  name: "bob"
});

const hope = new Guitar({
  name: "hope",
  stringsCount: 12
});

const coolBass = new BassGuitar({
  name: "cool",
});

console.log(gipsone);
console.log(hope);
console.log(coolBass);
console.log(coolBass.play());
console.log(coolBass.slap());