Codecademy export

app.js

//Super Class - Common Elements: title(string), isCheckedOut(boolean, initially false), rattings(array, initially empty), getAverageRating(method), toggleCheckOutStatus(method), addRating(method)
class Media {
  constructor(title) {
    this._title = title;
    this._isCheckedOut = false;
    this._ratings = [];
  }

  get title(){
    return this._title;
  }

  get isCheckedOut(){
    return this._isCheckedOut;
  }

  get ratings(){
    return this._ratings;
  }

/*
  set isCheckedOut(checkOutStatus){
    this._isCheckedOut = checkOutStatus;
  }
*/

  getAverageRating() {
    let ratingsSum = this.ratings.reduce((accumulator, currentVal) => accumulator + currentVal, 0);
    return ratingsSum / this.ratings.length;
  }

  toggleCheckOutStatus() {
    this._isCheckedOut = !this._isCheckedOut //
  }

  addRatings(rating) {
    this.ratings.push(rating);
  }
}

//Book class with Media inheritance
class Book extends Media {
  constructor(title, author, pages) {
    super(title);
    this._author = author;
    this._pages = pages;
  }

  get author(){
    return this._author;
  }

  get pages(){
    return this._pages;
  }
}

//Movie class with Media inheritance
class Movie extends Media {
  constructor(title, director, runTime) {
    super(title);
    this._director = director;
    this._runTime = runTime;
  }

  get director(){
    return this._director;
  }

  get runTime(){
    return this._runTime;
  }
}

//CD class with Media inheritance
class CD extends Media {
  constructor(title, artist, runTime) {
    super(title);
    this._artist = artist;
    this._runTime = runTime;
  }

  get artist(){
    return this._artist;
  }

  get runTime(){
    return this._runTime;
  }
}

//Test CD class with Media inheritance.
const CD1 = new CD('Man on The Moon', 'Kid Cudi', 30); //declare new CD object using classes and extension, save to CD1 variable.
CD1.toggleCheckOutStatus(); // bangs _isCheckedOut
console.log(CD1.isCheckedOut); // reads true
CD1.addRatings(5); // pushes 5 to Ratings array
CD1.addRatings(4); // pushes 4 to Ratings array
console.log(CD1.ratings); // reads [5, 4]
console.log(CD1.getAverageRating()); // reads 4.5