Question

I use prototypejs Class API for class-based OOP.

Is there a way to get the class name of an an object?

EG:

var myDog = new Dog();
myDog.getClassName() //Should return "Dog"

Answer 1

If you are using Prototypejs’ create() function to create the class, you need to store an additional property to hold the name of the class, since the only reference to a class named Dog is the variable name to which you assign the result of create():

var Dog = Class.create({
  className: "Dog",

  initialize: function() {
  }
});

var myDog = new Dog();
console.log(myDog.className); // "Dog"

On the other hand, if you are defining your class with something along these lines:

function Dog() {
}

Then, you could just use Object#constructor:

myDog.constructor.name; // "Dog"