Closures are poor man's objects and vice versa

closures-objects.js

function makeCounter(initial) {
  let counter = initial || 0;

  return {
    inc: () => { counter += 1; },
    dec: () => { counter -= 1; },
    reset: () => { counter = initial || 0; }
  }
}

const counter1 = makeCounter();
const counter2 = makeCounter();
counter1.inc();
counter1.inc();
counter1.dec();
counter2.inc();
counter2.inc();
counter2.reset();

class Counter {
  constructor(initial) {
    this.initial = initial || 0;
    this.counter = this.initial;
  }

  inc() {
    this.counter += 1; 
  }

  dec() {
    this.counter += 1; 
  }

  reset() {
    this.counter = this.initial; 
  }
}

const counter3 = new Counter();
const counter4 = new Counter();
counter3.inc();
counter3.inc();
counter4.inc();
counter4.dec();