Utility function to create a setInterval with its running status available

trackableSetInterval.js

/**
 * problem:: there is no way to know if a setInterval is  cleared or still running.
 * with the following utility function you can create a trackable setInterval.
 * http://jsbin.com/dakewamihi/edit?js,console
 */

/* definition */
function setTrackableSetInterval(logicFn, delay, trackerObj) {
  var trackerIndex = 0;

  trackerObj.status = true;
  
  var trackerTimerId = setInterval(function() {
    if (!trackerIndex || trackerObj.status) {
      trackerObj.status = false;
      trackerIndex++;
    } else {
      clearInterval(trackerTimerId);
    }
  }, delay);
  
  trackerObj.timerId = setInterval(function() {
    trackerObj.status = true;
    logicFn();
  }, delay);
}

/* usage */
var tracker = {};

// Invocation
setTrackableSetInterval(function() {
  // do something;
}, 1000, tracker);

// clearing Interval;
setTimeout(function() {
  clearInterval(tracker.timerId);
}, 5000);

// get status setTrackableSetInterval;
var loggerTimerId = setInterval(function(){
  console.log("Interval " + (tracker.status ? "running" : "stopped"));
}, 500);

setTimeout(function() {
  clearInterval(loggerTimerId);
}, 6000);