Schinckel.net

I’ve been using domFunction() to determine whether it’s safe to do all of my DOM modification code, but with some testing, I noticed that some pages were causing Firefox to eat up huge amounts of CPU time. I tracked the error down to the domFunction call, as it uses setInterval() to run a function every n seconds. This in itself is nice to know (I was looking for a similar feature a couple of days ago), but the nice part is that it has a stopping function: clearInterval(). You are supposed to use it like this:

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    timer = setInterval("Function();", interval);

This will then call the function Function every interval milliseconds. Neato. Except I only want a particular thing to happen once. So, as a part of my code, I was calling clearInterval(timer) inside a function called by Function.

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    function Startup(){
        Gravatars();
        .
        .
        .
        HumanTimePosts();
        
        clearInterval(timer);
    }
        
    //Code for all functions in here.
        
    timer = setInterval(function(){
        if (document.getElementById(\"footer\")){
            Startup();
        }
    }, 1000);

Which should work. Except for some reason, calls to clearInterval cannot come from inside functions called by setInterval. Or something like that. My next solution was to use:

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    function checkDOM(){
        if (getById("footer")||getById("credit")) Startup();
        else setTimeout("checkDOM();",100);
    }
    setTimeout("checkDOM();"

Which solves the problem, but it ugly. Finally, I came across this little number:

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    if (document.addEventListener) {
        document.addEventListener("DOMContentLoaded", Startup, null);
    }

This only works with Mozilla browsers, so for the time being I’ve combined the last two.