[jQuery] Blocking for javascript include

[jQuery] Blocking for javascript include


I'm writing a snippet of code to be put on any third party website and have
NO idea what environment it will be dropped into. My end goal is for the
badge to be
<script src="http://example.com/js/badge.js"></script>
I would like to use jQuery in my badge code to make my life easier, but I
don't want to require another include on the client side (getting anything
updated on the client is a pain).
This is the best I could come up with. I don't want anything before or after
my script to be affected with any leftover variables or weird collisions.
Does anyone see any issues? Any better solutions? The main one I see is the
time between the start of the anonymous function, and the end of checkLibs
is not going to block other scripts which might rely on window.jQuery being
available. Can you block other scripts in javascript?
// Namespace
if (typeof yourock == "undefined") yourock = {};
// Api function
yourock.popup = function(id) {
// Library isn't done loading
if (typeof(yourock.jQuery) == "undefined" || yourock.jQuery("*") ===
null) {
setTimeout(yourock.popup, 100);
return;
}
// Shorthand
var $ = yourock.jQuery;
// Do stuff
}
// Load libraries
(function() {
// If jQuery exists, save it and delete it to know when mine is loaded
var old_jQuery = null;
if (typeof(jQuery) != "undefined") {
if (typeof(jQuery.noConflict) == "function") {
old_jQuery = jQuery;
delete jQuery;
}
}
var addLibs = function() {
var head = document.getElementsByTagName("head");
if (head.length == 0) {
setTimeout(addLibs, 100);
return;
}
var node = document.createElement("script");
node.src =
"http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js";
head[0].appendChild(node);
checkLibs();
}
var checkLibs = function() {
// Library isn't done loading
if (typeof(jQuery) == "undefined" || jQuery("*") === null) {
setTimeout(checkLibs, 100);
return;
}
yourock.jQuery = jQuery.noConflict(true);
jQuery = old_jQuery;
}
addLibs();
})();