Implementacja wzorca projektowego Odwiedzający w Javascript

function bonusPattern(employee) {
  if (employee instanceof Manager) employee.bonus = employee.salary;
  if (employee instanceof Developer) employee.bonus = employee.salary / 2;
}

class Employee {
  constructor(salary) {
    this.bonus = 0;
    this.salary = salary;
  }
}

class Manager extends Employee {
  constructor(salary) {
    super(salary);
  }
}

class Developer extends Employee {
  constructor(salary) {
    super(salary);
  }
}

export { Developer, Manager, bonusPattern };