Changing the interval of SetInterval while it's running

Question

I have written a javascript function that uses setInterval to manipulate a string every tenth of a second for a certain number of iterations.

function timer(         


        

Answer 1

Simple answer is you can't update an interval of already created timer. (There is only two functions setInterval/setTimer and clearInterval/clearTimer, so having a timerId you can only deactivate it.) But you can made some workarounds. Take a look at this github repo.

Answer 2

I like this question - inspired a little timer object in me:

window.setVariableInterval = function(callbackFunc, timing) {
  var variableInterval = {
    interval: timing,
    callback: callbackFunc,
    stopped: false,
    runLoop: function() {
      if (variableInterval.stopped) return;
      var result = variableInterval.callback.call(variableInterval);
      if (typeof result == 'number')
      {
        if (result === 0) return;
        variableInterval.interval = result;
      }
      variableInterval.loop();
    },
    stop: function() {
      this.stopped = true;
      window.clearTimeout(this.timeout);
    },
    start: function() {
      this.stopped = false;
      return this.loop();
    },
    loop: function() {
      this.timeout = window.setTimeout(this.runLoop, this.interval);
      return this;
    }
  };

  return variableInterval.start();
};

Example use

var vi = setVariableInterval(function() {
  // this is the variableInterval - so we can change/get the interval here:
  var interval = this.interval;

  // print it for the hell of it
  console.log(interval);

  // we can stop ourselves.
  if (interval>4000) this.stop();

  // we could return a new interval after doing something
  return interval + 100;
}, 100);  

// we can change the interval down here too
setTimeout(function() {
  vi.interval = 3500;
}, 1000);

// or tell it to start back up in a minute
setTimeout(function() {
  vi.interval = 100;
  vi.start();
}, 60000);

Answer 3

You can use a variable and change the variable instead.

````setInterval([the function], [the variable])```

Answer 4

Make new function:

// set Time interval
$("3000,18000").Multitimeout();

jQuery.fn.extend({
    Multitimeout: function () {
        var res = this.selector.split(",");
        $.each(res, function (index, val) { setTimeout(function () { 
            //...Call function
            temp();
        }, val); });
        return true;
    }
});

function temp()
{
    alert();
}