Advertisement
Advertisement


Stop setInterval call in JavaScript


Question

I am using setInterval(fname, 10000); to call a function every 10 seconds in JavaScript. Is it possible to stop calling it on some event?

I want the user to be able to stop the repeated refresh of data.

2013/07/06
1
1424
7/6/2013 6:33:28 PM

Accepted Answer

setInterval() returns an interval ID, which you can pass to clearInterval():

var refreshIntervalId = setInterval(fname, 10000);

/* later */
clearInterval(refreshIntervalId);

See the docs for setInterval() and clearInterval().

2014/04/13
2204
4/13/2014 3:48:47 PM

If you set the return value of setInterval to a variable, you can use clearInterval to stop it.

var myTimer = setInterval(...);
clearInterval(myTimer);
2016/12/21

You can set a new variable and have it incremented by ++ (count up one) every time it runs, then I use a conditional statement to end it:

var intervalId = null;
var varCounter = 0;
var varName = function(){
     if(varCounter <= 10) {
          varCounter++;
          /* your code goes here */
     } else {
          clearInterval(intervalId);
     }
};

$(document).ready(function(){
     intervalId = setInterval(varName, 10000);
});

I hope that it helps and it is right.

2017/02/13

The answers above have already explained how setInterval returns a handle, and how this handle is used to cancel the Interval timer.

Some architectural considerations:

Please do not use "scope-less" variables. The safest way is to use the attribute of a DOM object. The easiest place would be "document". If the refresher is started by a start/stop button, you can use the button itself:

<a onclick="start(this);">Start</a>

<script>
function start(d){
    if (d.interval){
        clearInterval(d.interval);
        d.innerHTML='Start';
    } else {
        d.interval=setInterval(function(){
          //refresh here
        },10000);
        d.innerHTML='Stop';
    }
}
</script>

Since the function is defined inside the button click handler, you don't have to define it again. The timer can be resumed if the button is clicked on again.

2014/07/24

Already answered... But if you need a featured, re-usable timer that also supports multiple tasks on different intervals, you can use my TaskTimer (for Node and browser).

// Timer with 1000ms (1 second) base interval resolution.
const timer = new TaskTimer(1000);

// Add task(s) based on tick intervals.
timer.add({
    id: 'job1',         // unique id of the task
    tickInterval: 5,    // run every 5 ticks (5 x interval = 5000 ms)
    totalRuns: 10,      // run 10 times only. (omit for unlimited times)
    callback(task) {
        // code to be executed on each run
        console.log(task.name + ' task has run ' + task.currentRuns + ' times.');
        // stop the timer anytime you like
        if (someCondition()) timer.stop();
        // or simply remove this task if you have others
        if (someCondition()) timer.remove(task.id);
    }
});

// Start the timer
timer.start();

In your case, when users click for disturbing the data-refresh; you can also call timer.pause() then timer.resume() if they need to re-enable.

See more here.

2019/02/02

The clearInterval() method can be used to clear a timer set with the setInterval() method.

setInterval always returns a ID value. This value can be passed in clearInterval() to stop the timer. Here is an example of timer starting from 30 and stops when it becomes 0.

  let time = 30;
  const timeValue = setInterval((interval) => {
  time = this.time - 1;
  if (time <= 0) {
    clearInterval(timeValue);
  }
}, 1000);
2019/05/31

Source: https://stackoverflow.com/questions/109086
Licensed under: CC-BY-SA with attribution
Not affiliated with: Stack Overflow
Email: [email protected]