add moment().intervalNow() for exact left time without timezone

moment("2013-04-27T05:48:29.000Z").intervalNow()
"3 days 15 hours 2 minutes 53 seconds"

moment("2013-04-27T05:48:29.000Z").intervalNow(1)
"in 3 days 15 hours 2 minutes 53 seconds"

need for exact left time without timezone

thank you.