set a timer for 2 minutes and 50 seconds

Please note that all scheduling methods do not guarantee the exact delay.įor example, the in-browser timer may slow down for a lot of reasons: The browser limits the minimal delay for five or more nested calls of setTimeout or for setInterval (after 5th call) to 4ms.Zero delay scheduling with setTimeout(func, 0) (the same as setTimeout(func)) is used to schedule the call “as soon as possible, but after the current script is complete”.You can also pause the timer at any time using the 'Pause' button. You can reset the timer at any time using the 'Reset' button. The timer will alert you when it expires.

Press the 'Start' button to start the timer. Nested setTimeout calls are a more flexible alternative to setInterval, allowing us to set the time between executions more precisely. A countdown timer for 15 minutes and 50 seconds.To cancel the execution, we should call clearTimeout/clearInterval with the value returned by setTimeout/setInterval.args) allow us to run the func once/regularly after delay milliseconds. That limitation comes from ancient times and many scripts rely on it, so it exists for historical reasons.įor server-side JavaScript, that limitation does not exist, and there exist other ways to schedule an immediate asynchronous job, like setImmediate for Node.js. The similar thing happens if we use setInterval instead of setTimeout: setInterval(f) runs f few times with zero-delay, and afterwards with 4+ ms delay. The 4+ ms obligatory delay between invocations comes into play. If (start + 100 < Date.now()) alert(times) // show the delays after 100msĮlse setTimeout(run) // else re-schedule Times.push(Date.now() - start) // remember delay from the previous call

Set a timer for 2 minutes and 50 seconds