conditional promise in coffeescript

conditional_promise.coffee

conditional = true
promises_list = []

if conditional?
  #if conditional is true run this promises
  p.push Promise.conditional conditional

p.push Promise.normal 

Promise.all p
.then (output) ->
  conditional_result = output.conditional_result

  if conditional_result
    console.log 'this the result of the conditional promise
    
  console.log 'this the result of the normal promise