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.

Answer 1

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

var myTimer = setInterval(...);
clearInterval(myTimer);

Answer 2

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().

Answer 3

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.

Answer 4

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.