Uncaught TypeError: method is not a function

Question

Code:

function Hotel(name,rooms,bookings){

    this.name = name;
    this.rooms = rooms;
    this.bookings = bookings;

    this.checkAvailability = function(){         


        

Answer 1

You need to change how the event is being bound.

addBooking.addEventListener('click', grandHotel.bookRoom.bind(grandHotel), false);

or

addBooking.addEventListener('click', function() { grandHotel.bookRoom(); }, false);