ES6 Classes & Constructors

class Counter {
  static count = 0;
  
  constructor() {
    Counter.count++;
  }
  
  static getCount() {
    return Counter.count;
  }
}

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Counter.getCount() will return 2 because: 1) Static fields are shared across all instances of a class, 2) Each constructor call increments the static count property, 3) Static methods can access static properties but not instance properties, 4) The count persists as long as the class exists, 5) This is useful for tracking the number of instances created, 6) Static members belong to the class itself, not to instances.
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