Question

The native javascript:

var Person;
Person = Backbone.Model.extend({});

This code is working fine if I write in google chrome console var person = new Person;

my main.coffee

Person = Backbone.Model.extend({})

the generated main.js

// Generated by CoffeeScript 1.4.0
(function() {
  var Person;

  Person = Backbone.Model.extend({});

}).call(this);

If I write in google chrome console:

var person = new Person;
ReferenceError: Person is not defined

How can I create a instance from console with generated javascript instead native javascript?

Answer 1

CoffeeScript defaults to wrapping all code in a function to avoid polluting the global namespace. You can compile the code with the -b/--bare flag to avoid this wrapper, or use window.Person = Backbone.Model.extend({}) to make it global manually, which is the common way of doing what you want in CoffeeScript.