https://www.onsip.com/blog/avoiding-javascript-settimeout-and-setinterval-problems

Scheduler.js

var Scheduler = (function () {
    var tasks = [];
    var minimum = 10;
    var timeoutVar = null;
    var output = {
      add: function (func, context, timer, once) {
        var iTimer = parseInt(timer);
        context = context && typeof context === 'object' ? context : null;
        if(typeof func === 'function' && !isNaN(iTimer) && iTimer > 0) {
          tasks.push([func, context, iTimer, iTimer * minimum, once]);
        }
      },
      remove: function (func, context) {
        for(var i=0, l=tasks.length; i<l; i++) {
          if(tasks[i][0] === func && (tasks[i][1] === context || tasks[i][1] == null)) {
            tasks.splice(i, 1);
            return;
          }
        }
      },
      halt: function () {
        if(timeoutVar) {
          clearInterval(timeoutVar);
        }
      }
    };
    var schedule = function () {
      for(var i=0, l=tasks.length; i<l; i++) {
        if(tasks[i] instanceof Array) {
          tasks[i][3] -= minimum;
          if(tasks[i][3] < 0) {
            tasks[i][3] = tasks[i][2] * minimum;
            tasks[i][0].apply(tasks[i][1]);
            if(tasks[i][4]) {
              tasks.splice(i, 1);
            }
          }
        }
      }
    };
    timeoutVar = setInterval(schedule, minimum);
    return output;
  })();