window.storageAvailable = (type) ->
  try
    storage = window[type]
    x = '__storage_test__'
    storage.setItem x, x
    storage.removeItem x
    true

  catch e
    e instanceof DOMException and
      # everything except Firefox
      (e.code == 22 or
      # Firefox
      e.code == 1014 or
      # test name field too, because code might not be present
      # everything except Firefox
      e.name == 'QuotaExceededError' or
      # Firefox
      e.name == 'NS_ERROR_DOM_QUOTA_REACHED') and
      # acknowledge QuotaExceededError only if there's something already stored
      storage.length != 0