Closure vs Class on JavaScript

closure-vs-class.js

// closure
function foo(initial = 0) {
  let counter = initial
  return {
    get counter() { return counter },
    increment() { counter += 1 },
  }
}
const f1 = foo()
f1.counter //=> 0
f1.increment()
f1.counter //=> 1

// class
class Foo {
  constructor(initial = 0) {
    this.counter = initial
  }
  increment() { this.counter += 1 }
}
const f2 = new Foo()
f2.counter //=> 0
f2.increment()
f2.counter //=> 1