node/doc/api/timers.markdown

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## Timers
### setTimeout(callback, delay, [arg], [...])
To schedule execution of a one-time `callback` after `delay` milliseconds. Returns a
`timeoutId` for possible use with `clearTimeout()`. Optionally you can
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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
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you can also pass arguments to the callback.
### clearInterval(intervalId)
Stops a interval from triggering.