Node.js之计时器timer

Timers#

Stability: 5 - Locked

All of the timer functions are globals.  You do not need to require()this module in order to use them.

所有的计时器方法都是全局的。不用加载该模块就可直接使用它们。

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

To schedule execution of a one-time callback after delay milliseconds. Returns atimeoutId for possible use withclearTimeout(). Optionally you can also pass arguments to the callback.

It is important to note that your callback will probably not be called in exactlydelay milliseconds - Node.js makes no guarantees about the exact timing of when the callback will fire, nor of the ordering things will fire in. The callback will be called as close as possible to the time specified.

clearTimeout(timeoutId)#

Prevents a timeout from triggering.

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

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

clearInterval(intervalId)#

Stops a interval from triggering.