Viewing all the timouts/intervals in javascript?

Question

I'm writing an application that utilizes Javascript timouts and intervals to update the page, is there a way to see how many intervals are setup? I want to make sure that I'm not accidentally going to kill the browser by having hundreds of intervals setup.

is this even an issue?

Answer 1

I don't think there is a way to enumerate active timers, but you could override window.setTimeout and window.clearTimeout and replace them with your own implementations which do some tracking and then call the originals.

window.originalSetTimeout=window.setTimeout;
window.originalClearTimeout=window.cleartTimeout;
window.activeTimers=0;

window.setTimeout=function(func,delay)
{
    window.activeTimers++;
    return window.originalSetTimeout(func,delay);
};

window.clearTimeout=function(timerID)
{
    window.activeTimers--;
    window.originalClearTimeout(timerID);
};

Of course, you might not always call clearTimeout, but this would at least give you some way to track what is happening at runtime.