Using Coffeescript with KnockoutJS

LoginFormViewModel.coffee

class LoginFormViewModel
  constructor: -> #from my many attempts, things works out best when you set them up from the constructor
		@email= ko.observable("")
		@pass= ko.observable("")
		@logon= => #notice the fat arrow here
			$.post '/Account/Login',
			userId: @email()
			password: @pass()
			(data) -> $('body').append "Successfully posted to the page."

window.app = window.app || {}
window.app.LoginFormViewModel = LoginFormViewModel #exporting this guy is important as it makes it usable by external scripts

LoginFormViewModel.js

(function() {
  var LoginFormViewModel;

  LoginFormViewModel = (function() {
    function LoginFormViewModel() {
      var _this = this;

      this.email = ko.observable("");
      this.pass = ko.observable("");
      this.logon = function() {
        $.post('/Account/Login', {
          userId: _this.email(),
          password: _this.pass()
        });
        return function(data) {
          return $('body').append("Successfully posted to the page.");
        };
      };
    }

    return LoginFormViewModel;

  })();

  window.app = window.app || {};

  window.app.LoginFormViewModel = LoginFormViewModel;

}).call(this);