Function Synchronization in JSDeferred

Question

JavaScript

Started looking at the library. Why might this code not work?

Deferred = (require './libs/jsdeferred.js').Deferred

Deferred.define()

func = (s, t)->
  def = new Deferred()
  console.log "Im works"
  setTimeout(()->
    console.log s
  , t)
  return def
next(()->
  return func("Hello", 3000)
).next(()->
  return func("World", 1000)
)

In response I receive

$ coffee test.coffee 
Im works
Hello

Answer 1

You need to explicitly call deferred.call in the setTimeout callback
Try this

Deferred = (require './libs/jsdeferred.js').Deferred

Deferred.define()

func = (s, t)->
    def = new Deferred()
    console.log "Im works"
    setTimeout(()->
        console.log s
        def.call
    , t)
    return def
next(()->
    return func("Hello", 3000)
).next(()->
    return func("World", 1000)
)