Sample CoffeeScript ViewModel for KnockoutJS

SampleViewModel.coffee

class SampleViewModel
    constructor: (values) ->
        this.title = ko.observable()
        this.description = ko.observable()
        this.isPrivate = ko.observable()
        this.status = ko.observable "Active"
        this.showApproveReject = ko.computed => @isActive()
        this.statusUrl = ko.observable()
        this.privacyUrl = ko.observable()
        _.extend(this, Backbone.Events)
        this.isPrivate.subscribe (newValue) =>
            this.trigger("privacyChanged", newValue)
 
    isActive: ->
        @status() == "Active"

    approve: ->
        @trigger("approved")
        @status("Approved")
        return false

    reject: ->
        @trigger("rejected")
        @status("Rejected")
        return false

window.app = window.app || {}
window.app.SampleViewModel = SampleViewModel