participatng_state.js

class Person {
	constructor(name) {
		this.name = name;
	}
	count() {
		return Person.prototype.counter++;
	}
}

Person.prototype.counter = 0;

class Programmer extends Person {
	codding() {
		console.log('do codding');
	}
}

var p = new Programmer('Pawel');
var p2 = new Programmer('Lukas');

p.count();
p2.count();