In ES5 it was possible to create multiple constructors for a class while keeping common parts to both using prototypes, as shown below

function Book() {

    //just creates an empty book.

}





function Book(title, length, author) {

    this.title = title;

    this.Length = length;

    this.author = author;

}



Book.prototype = {

    ISBN: ,

    Length: -1,

    genre: ,

    covering: ,

    author: ,

    currentPage: 0,

    title: ,



    flipTo: function FlipToAPage(pNum) {

        this.currentPage = pNum;

    },



    turnPageForward: function turnForward() {

        this.flipTo(this.currentPage++);

    },



    turnPageBackward: function turnBackward() {

        this.flipTo(this.currentPage--);

    }

};



var books = new Array(new Book(), new Book(First Edition, 350, Random));

I want to achieve the same result using ES6 class and constructor syntax

class Book{

    constructore (){}

}