impureOOPExample.js

class Counter {

  constructor() {
    this.count = 0;
  }

  increment() {
    this.count++;
  }

  getCount() {
    return this.count;
  }

  printCount() {
    console.log(this.count);
  }

}

myCounter = new Counter();
counter.increment();
console.log(counter.getCount());
counter.printCount();