Repeating setTimeout

Question

I am trying to repeat setTimeout every 10 seconds. I know that setTimeout by default only waits and then performs an action one time. How can I repeat the process?

setTimeout(function() {
  setTimeout(function() {
    console.log("10 seconds");
  }, 10000);
}, 10000);

Answer 1

Maybe you should use setInterval()

Answer 2

setInterval() is probably what you're looking for, but if you want to do get the same effect with setTimeout():

function doSomething() {
    console.log("10 seconds");
    setTimeout(doSomething, 10000);
}

setTimeout(doSomething, 10000);

Or if you don't want to declare a separate function and want to stick with a function expression you need to make it a named function expression:

setTimeout(function doSomething() {
    console.log("10 seconds");
    setTimeout(doSomething, 10000);
}, 10000);

(Or use arguments.callee if you don't mind using deprecated language features.)

Answer 3

according to me setInterval() is the best way in your case.
here is some code :

 setInterval(function() {

//your code

}, 10000); 
// you can change your delay by changing this value "10000".

Answer 4

Unlike the answers provided by @nnnnnn and @uzyn I discourage you from making use of setInterval for reasons elaborated in the following answer. Instead make use of the following Delta Timing script:

function DeltaTimer(render, interval) {
    var timeout;
    var lastTime;

    this.start = start;
    this.stop = stop;

    function start() {
        timeout = setTimeout(loop, 0);
        lastTime = + new Date;
        return lastTime;
    }

    function stop() {
        clearTimeout(timeout);
        return lastTime;
    }

    function loop() {
        var thisTime = + new Date;
        var deltaTime = thisTime - lastTime;
        var delay = Math.max(interval - deltaTime, 0);
        timeout = setTimeout(loop, delay);
        lastTime = thisTime + delay;
        render(thisTime);
    }
}

The above script runs the given render function as close as possible to the specified interval, and to answer your question it makes use of setTimeout to repeat a process. In your case you may do something as follows:

var timer = new DeltaTimer(function (time) {
    console.log("10 seconds");
}, 10000);

var start = timer.start();

Answer 5

const myFunction = () => {
        setTimeout(() => {
            document.getElementById('demo').innerHTML = Date();
            myFunction();
        }, 10000);
    }

Easiest, but not efficient way!

Answer 6

Here is a function using setTimeout that tried to call itself as close as it can to a regular interval. If you watch the output, you can see the time drifting and being reset.

<script type="text/javascript">

function Timer(fn, interval) {
  this.fn = fn;
  this.interval = interval;
}

Timer.prototype.run = function() {

    var timer = this;
    var timeDiff = this.interval;
    var now = new Date();  // Date.now is not supported by IE 8
    var newInterval;

    // Only run if all is good
    if (typeof timer.interval != 'undefined' && timer.fn) {

      // Don't do this on the first run
      if (timer.lastTime) {
        timeDiff = now - timer.lastTime;
      }
      timer.lastTime = now;

      // Adjust the interval
      newInterval = 2 * timer.interval - timeDiff;

      // Do it
      timer.fn();

      // Call function again, setting its this correctly
      timer.timeout = setTimeout(function(){timer.run()}, newInterval);
  }
}


var t = new Timer(function() {
  var d = new Date();
  document.getElementById('msg').innerHTML = d + ' : ' + d.getMilliseconds();
}, 1000);


window.onload = function() {
  t.run();
};
</script>

<span id="msg"></span>

Answer 7

Using jQuery, this is what you could do:

function updatePage() {

var interval = setTimeout(updatePage, 10000); // 10' Seconds

    $('a[href]').click(function() {
      $(this).data('clicked', true);
      clearInterval(interval); // Clears Upon Clicking any href Link
      console.log('Interval Cleared!');
    });
   // REPLACE 'YOUR_FUNCTION_NAME' function you would like to execute
    setTimeout(YOUR_FUNCTION_NAME, 500);

} // Function updatePage close syntax

updatePage(); // call the function again.