Coffeescript does not allow setting the AngularJS controller property as the last line of code

Question

Coffeescript does not allow setting the AngularJS controller property as the last line of code

Having an issue while using Coffeescript to define a controller with the "HomeController as homeCtrl" syntax.

angular.module('myApp.controllers',[]).controller("HomeController", ->

    @someArray = []

    # return
)

Encountering a problem where scope.homeCtrl is being set as [] instead of the expected object {someArray: []}. The root cause seems to be that Coffeescript automatically returns the last line of a function, resulting in return this.someArray = [] returning [] for the function. One workaround is to uncomment the bare return command, or use something like return true or @baz='foobar'. Oddly enough, this issue only occurs when the last line of the function returns an array. What could be causing this?

javascript angularjs coffeescript

Answer 1

Answer №1

Finally cracked that puzzle! It's not just limited to arrays, remember to always return at the end of your controllers.

UPDATE: Adding more clarity, Angular treats the function as a Constructor when using the new keyword. The behavior of Constructors is detailed in This Stack Exchange Post

Answer 2

Finally cracked that puzzle! It's not just limited to arrays, remember to always return at the end of your controllers.

UPDATE: Adding more clarity, Angular treats the function as a Constructor when using the new keyword. The behavior of Constructors is detailed in This Stack Exchange Post

Answer 3

Answer №2

If you prefer, you have the option to utilize CoffeeScript's class keyword in order to compel CS to generate a class constructor:

angular.module('myApp.controllers',[]).controller "HomeController", class
  constructor: ->
    @someArray = []

Alternatively, you can create a named class first and then pass it on to angular.js:

class HomeController
  constructor: ->
    @someArray = []

angular.module('myApp.controllers',[]).controller "HomeController", HomeController

Answer 4

If you prefer, you have the option to utilize CoffeeScript's class keyword in order to compel CS to generate a class constructor:

angular.module('myApp.controllers',[]).controller "HomeController", class
  constructor: ->
    @someArray = []

Alternatively, you can create a named class first and then pass it on to angular.js:

class HomeController
  constructor: ->
    @someArray = []

angular.module('myApp.controllers',[]).controller "HomeController", HomeController

Coffeescript does not allow setting the AngularJS controller property as the last line of code

Answer №1

Answer №2

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