What happens to setTimeout when the computer goes to sleep?

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As far as I’ve tested, it just stops and resumes after the computer wakes up. When the computer awakes the setInterval/setTimeout is unaware that any time passed.

I don’t think you should rely on the accuracy of setTimeout/Interval for time critical stuff. For google chrome I discovered recently that any timeout/interval (that is shorter than 1s) will be slowed down to once a second if the tab where it’s activated looses focus.

Apart from that the accuracy of timeouts/intervals is dependent on other functions running etc. In short: it’s not very accurate.

So using interval and timeouts, checking the time against a starttime within the function started by it would give you better accuracy. Now if you start at 12:00, the computer goes to sleep and wakes up at 16:13 or so, checking 16:13 against 12:00 you are certain you have to renew the token. An example of using time comparison can be found here

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