Why don't backbone and coffescript work?

Question

JavaScript

class Person extends Backbone.model
  defaults
    name:'Nick'
    age:24
    job: 'Front-end developer'

person = new Person
  name: 'Andrey'
  age: 27

console.log person

Error in browser

Uncaught TypeError: Cannot read property 'prototype' of undefined

I googled that the parent is not defined in __extends, in this case it is _super
How to define it in coffee?

Answer 1

The error turned out to be the most banal my _super (parent) is model.
I wrote model with a small letter.
inattention