[removed] How to add getter to an existing object

Question

I can have a getter in a JavaScript object like this:

var member = {
    firstName:"XYZ", 
    lastName:"zzz", 
    get fullName(){ return         


        

Answer 1

try defineProperty

Object.defineProperty(member, 'isGuest', {
  get: function() { return this.firstName=='Guest' }
});