Codecademy export

app.js

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(isCheckedOut){
    this.isCheckedOut = isCheckedOut ;
  }
  
  toggleCheckOutStatus(){ this._isCheckedOut =! this._ischeckedOut;
    
  }
  addRating(ratings){
this._ratings.push(ratings);
}

 getAverageRating(){
let lengthOfArray = this._ratings.length;
let ratingsSum = this.ratings.reduce((currentSum,rating) => currentSum + rating, 0);
let average = Math.round(ratingsSum / lengthOfArray);
this._ratings = average;
}


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

class Movie extends Media{
  constructor(director,title,runTime){
    super(title);
    this._director = director;
    this._runtime = runtime;
  }
get dirctor(){return this._director;}
  get author(){return this._author;}
}
const historyOfEverything = new Book ('A Short History of Nearly Everything', 'Bill Bryson');
historyOfEverything.toggleCheckOutStatus();
console.log(historyOfEverything.isCheckedOut);
historyOfEverything.addRating(4);
historyOfEverything.addRating(5);
historyOfEverything.addRating(5);
historyOfEverything.getAverageRating();
console.log(historyOfEverything.getAverageRating())