Greensock TimelineMax Javascript Singleton Different in Firefox - javascript

I'm relatively new javascript, but I am comfortable in other languages. I'm trying to use the Greensock timeline to construct modular sequences to reduce code duplication. I'm trying to have a singleton timeline that is accessible by all my functions. I tried just using a global var and attaching to() methods to it. That worked in chrome and iexplorer, but not Firefox. I received a "this.timeline is null" error in the Firefox error console. Then I tried this:
var TL = (function() {
var tl = new TimelineMax();
function returnInstance() {
return tl;
}
return {
inst: function() {
return returnInstance();
}
}
})();
This made the singleton I want, but I get the same error only in FF. The code below works fine in both chrome and iexplorer:
dev.html:
<html>
<body>
<-- Page content... -->
<script type='text/javascript' src='js/jquery.js'></script>
<script type='text/javascript' src='js/TweenMax.min.js'></script>
<script type='text/javascript' src='js/foo.js'></script>
<script type='text/javascript'>
$(document).ready(function(){
init();
});
</script>
</body>
</html>
foo.js:
//...singleton code from above...
function init(){
do1();
do2(-2);
}
do1(delay){
delay = delay || 0;
var gTL = TL.inst();
gTL.to($("#bar"),2,{css:{autoAlpha:1}},delay);
}
do2(delay){
delay = delay || 0;
var gTL = TL.inst();
gTL.to($("#canv"),2,{css:{autoAlpha:1}},delay);
}
So, this will make #bar and #canv enter at the same time (if I call do2(0); then #canv will come in after #bar is done).
Do you have any insight into what I'm doing wrong or why FF is handling the code differently?
Thanks for your help.
EDIT1
Browser Versions:
Chrome(19.0.1084.56)
Internet Explorer(9.0.8112.16421)
Firefox(13.0)
EDIT2
The error generates from inside of the TweenMax.min.js file.
EDIT3
Before trying to use a global timeline and a singleton, I implemented the desired functionality by passing a TimelineMax reference to each function and returning the updated TimelineMax. So, my code looked a little like this:
foo.js
function init() {
var tl = new TimelineMax();
tl = do1(tl);
tl = do2(tl);
}
do1(TL){
TL.to(...);
return TL;
}
do2(TL){
TL.to(...);
return TL;
}
This seemed to work fine in Firefox, but it's a little more tedious to play hot potato with the timeline object. Is that the preferred method? Where can I find well formed coding standards and best practices for javascript?
EDIT4
Here is the full non-working code. It works as expected in both chrome and ie, but I receive an error in FF coming from the TweenMax.js library.
dev_page2.html:
<!DOCTYPE HTML>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" >
<link rel="stylesheet" type="text/css" href="css/dev.css">
<!--[if lt IE 7]>
<style media="screen" type="text/css">
#main {
height:100%;
}
</style>
<![endif]-->
</head>
<body class="whiteBG">
<header class="center">
<div id="bar" class="invisible">
<nav>
<!-- nav elements here... -->
</nav><!-- nav -->
</div><!-- bar -->
<canvas id="ani" class='invisible center' width='840' height='420'></canvas>
</header><!-- End header -->
<section id="main">
<div id="content" class="center">
<p>
</p><blockquote>
</blockquote><p class="signature">
</p><p class="float-left">
</p><p class="float-left">
</p>
</div> <!-- End content -->
</section>
<footer class="invisible center">
<div id="footerLeft">
</div>
<div id="footerCenter">
</div>
<div id="footerRight">
</div>
</footer><!-- End footer -->
<script type="text/javascript" src="js/Jquery.js">
</script>
<script type="text/javascript" src="js/TweenMax.js"></script>
<script type="text/javascript" src="js/dev2.js"></script>
<script type="text/javascript">
$(document).ready(function() {
init();
});
</script>
</body>
</html>
dev2.js:
// Copyright 2012 Gray Designs. All Rights Reserved.
/*
* #author rocky.grayjr#gmail.com (Rocky Gray)
* #date May 13, 2012
*/
function init()
{
enterNavBar();
drawCanvas();
enterCanvas(-2);
enterFooter(-1);
}
var TL = (function() {
var tl = new TimelineMax();
function returnInstance() {
return tl;
}
return {
inst: function() {
return returnInstance();
}
}
})();
function enterNavBar(delay)
{
delay = delay || 0;
var gTL = TL.inst();
//nav bar fade in
gTL.to($("#bar"),2,{css:{autoAlpha:1},ease:Quad.easeIn,onComplete:function(){
$("#bar").removeClass('invisible');
}},delay);
}
function enterCanvas(delay)
{
delay = delay || 0;
var gTL = TL.inst();
gTL.to($("#ani"),2,{css:{autoAlpha:1},ease:Quad.easeIn,onComplete:function(){
$("#ani").removeClass('invisible');
}},delay);
}
function enterFooter(delay)
{
delay = delay || 0;
var gTL = TL.inst();
//nav bar fade in
gTL.to($("footer"),2,{css:{autoAlpha:1},ease:Quad.easeIn,onComplete:function(){
$("footer").removeClass('invisible');
}},delay)
}
function drawCanvas()
{
//var canv = document.getElementById("ani");
var $canv = $('#ani');
var ctx = $canv[0].getContext("2d");
ctx.fillStyle="#000";
ctx.fillRect(0,0,840, 420,0);
}

It sounds like you might be using an outdated version of the GreenSock files. This sounds like an issue that was very rare and was fixed in a more recent version (my apologies for any hassles). Would you mind downloading the latest and trying again? http://www.greensock.com/v12/

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