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PODynamically loading jQuery from hosted javascript file if not available on page
 

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    <p>The idea of what I'm trying to do is allow a client to add a script that I host onto their website. I want to be able to use jQuery in my script but can not say for sure that it will always be available. Here is what I have code wise. This is the full file of my hosted javascript page so far and I can not get it to work. The $('title').html part is just so I can see if it works</p> <p><strong>I want the script that I am hosting to take care of including jQuery on the clients website. I do not want the client to have to include jQuery in addition to my script</strong></p> <pre><code>window.onload = function () { if (typeof jQuery == 'undefined') { var jq = document.createElement('script'); jq.type = 'text/javascript'; jq.src = ('https:' == document.location.protocol ? 'https://' : 'http://') + 'ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js'; var sc = document.getElementsByTagName('script')[0]; sc.parentNode.insertBefore(jq, sc); } console.log($('title').html()); } </code></pre> <p>This javascript file is loacated on my server and my client would include this file in much of the same way that you would for google analytics.</p> <p>This is the only thing that I want my client to have to include. Pulled basically the same as google analytics</p> <pre><code>&lt;script type="text/javascript"&gt; var _waq = _gaq || []; _waq.push(['PARAM1', 'PARAM2']); (function() { var wa = document.createElement('script'); wa.type = 'text/javascript'; wa.async = true; wa.src = ('https:' == document.location.protocol ? 'https://' : 'http://') + 'PATH/TO/SCRIPT/wa.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(wa, s); })(); &lt;/script&gt; </code></pre> <p>When I run the page I get an error saying <code>Uncaught ReferenceError: $ is not defined</code> however if I then right after the page loads, i type in <code>$('title').html();</code> I get the title returned in the console.</p> <p>Im sure this has something to do with timing of when the console.log in the script is running and has not let jQuery fully load yet. My question is how am I able to create a javascript page that a client can add that dynamically loads jquery if it is not available, and have it loaded before any of the other stuff on the script runs? </p>
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