請參閱下面粗體部分。如果有人能幫助我，我將不勝感激。 如何確保 addRating（） 方法的輸入介于 1 和 5 之間？也許有某種方法可以阻止代碼繼續/處理平均評分，如果其中一個評分低于 1 且高于 5。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(status) {    this._isCheckedOut = status;  }  toggleCheckOutStatus() {    this.isCheckedOut = !this.isCheckedOut;  }  getAverageRating() {    let ratingsSum = this.ratings.reduce((accumulator, currentRating) =>    accumulator + currentRating);    return ratingsSum/this.ratings.length;  }  // Here is the mentioned function  // look inside addRating()  addRating(newRating) {    if (newRating < 1 || newRating > 5) {      console.log("Invalid Input. Please enter an integer between 1-   5.");      } else {      this.ratings.push(newRating);    }  }}class Book extends Media {  constructor(author, title, pages) {    super(title);    this._author = author;    this._pages = pages;  }  get author() {    return this._author;  }   get pages() {    return this._pages;  }}class Movie extends Media {  constructor(director, title, runTime) {    super(title);    this._director = director;    this._runTime = runTime;  }  get director() {    return this._director;  }  get runTime() {    return this._runTime;  }}const historyOfEverything = new Book('Bill Bryson', 'A Short History of Nearly Everything', 544);historyOfEverything.toggleCheckOutStatus();console.log(historyOfEverything.isCheckedOut);historyOfEverything.addRating(4);historyOfEverything.addRating(5);historyOfEverything.addRating(5);console.log(historyOfEverything.getAverageRating());const speed = new Movie('Jan de Bont', 'Speed', 116);speed.toggleCheckOutStatus();console.log(speed.isCheckedOut);speed.addRating(1);speed.addRating(1);speed.addRating(5);console.log(speed.getAverageRating());