How to clearInterval with unknown ID?

Question

Say someone (evil) has set us a timer with setInterval, but we don\'t know its ID (we don\'t have the reference to the object, that setInterval is returning, no

Answer 1

I tried the approach suggested by #Shadow Wizard and it worked in clearing the interval. However, this approach had side effects afterwards. In my particular case, I was unable use jquery.fadeTo() after clearing all of the intervals.

The approach that I settled on is a cleaner solution, which is to redefine the setInterval method and save the interval ids in the re-defined methods. As shown here, I put the the ids into an array and then clear all of them. With a little more refinement of the structure to store the arrays, you could label them and clear them selectively.

var intervalTracking = new Array();
var intervalCount=0;

window.oldSetInterval = window.setInterval;
window.setInterval = ( function(func, interval) {
    var interval = oldSetInterval(func, interval);
    intervalTracking[++intervalCount]=interval;
    return interval;
});

function clearAllIntervals() {
    for (var i = 0 ; i <= intervalCount ; i++) {
    window.clearInterval( intervalTracking[i] );
    }
}

This seems to work!