nodejs/doc/api/timers.markdown

Timers

setTimeout(callback, delay, [arg], [...])

To schedule execution of callback after delay milliseconds. Returns a timeoutId for possible use with clearTimeout(). Optionally, you can also pass arguments to the callback.

clearTimeout(timeoutId)

Prevents a timeout from triggering.

setInterval(callback, delay, [arg], [...])

To schedule the repeated execution of callback every delay milliseconds. Returns a intervalId for possible use with clearInterval(). Optionally, you can also pass arguments to the callback.

clearInterval(intervalId)

Stops a interval from triggering.