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In the last exercise, we created a parent class named Animal for two child classes named Cat and Dog.

The Animal class below contains the shared properties and methods of Cat and Dog.

class Animal {
  constructor(name) {
    this._name = name;
    this._behavior = 0;
  }

  get name() {
    return this._name;
  }

  get behavior() {
    return this._behavior;
  }   

  incrementBehavior() {
    this._behavior++;
  }
}

The code below shows the Cat class that will inherit information from the Animal class.

class Cat {
  constructor(name, usesLitter) {
    this._name = name;
    this._usesLitter = usesLitter;
    this._behavior = 0;
  }

  get name() {
    return this._name;
  }

  get behavior() {
    return this._behavior;
  }

  get usesLitter() {
    return this._usesLitter;
  }

  incrementBehavior() {
    this._behavior++;
  }
}

To the right, in main.js, you will put what you learned to practice by creating a parent class named HospitalEmployee.

Instructions

In the next few exercises, you will create two subclasses (Doctor and Nurse) from a parent class named HospitalEmployee. Below, we have listed the properties and methods you will find in the Doctor and Nurse classes.

Doctor

Properties: _name, _remainingVacationDays (set to 20 inside the constructor()), _insurance
Methods: .takeVacationDays()

Nurse

Properties: _name, _remainingVacationDays (set to 20 inside constructor()), _certifications
Methods: .takeVacationDays(), .addCertification()

In main.js, create a parent class named HospitalEmployee. Add a constructor with name as an argument.

Inside of the constructor(), set the instance’s _name to name and _remainingVacationDays to 20.

Under the constructor, create getters for your _name and _remainingVacationDays properties.

Inside the getter, return the property’s value.

Under the getters, add a method called takeVacationDays.

This method should accept one argument, called daysOff.

Inside the method, subtract daysOff from _remainingVacationDays. Save the result to _remainingVacationDays.

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