ES6 Classes Example

script.js

//define Book as an object constructor function
class Book {
constructor(name,author,price){
 this.name = name;
 this.author = author;
 this.price = price;
}
getBookCost(){
  return `The book ${this.name} was written by ${this.author} and costs $${this.price}`;
     }
}

const jspatterns      = new Book('JavaScript Patterns','Stoyan Stefanov',12);
const masteringnodejs = new Book('Mastering Node.js','Sandro Pasquali',9);

//call getBookDetails method on each defined book
jspatterns.getBookCost();// "The book JavaScript Patterns was written by Stoyan Stefanov and costs $12"
masteringnodejs.getBookCost();// "The book Mastering Node.js was written by Sandro Pasquali and costs $9"