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POSpeed Up Facebook / Twitter / G+ Buttons By Defining Classes to Look In
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  1. POSpeed Up Facebook / Twitter / G+ Buttons By Defining Classes to Look In
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    copied!<p>It's taking forever for my social sharing links to load on my page (it's in my sandbox still, so I can't provide access). Looking through all three of the main players, they're all using <code>getElementsByTagName</code> and are searching through all the elements of the page. </p> <p>Since I'm already assigning classes to all social instances, couldn't I just tweak the function to only look through elements with the right classes? </p> <p>Maybe this isn't going to see massive speed improvements, but I'd like to squeeze out every millisecond of performance I can.</p> <p><strong>Facebook async JavaScript:</strong></p> <pre><code>&lt;script&gt; (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&amp;appId=356176301083466"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk'));&lt;/script&gt; &lt;/script&gt; </code></pre> <p><strong>Twitter async JavaScript:</strong></p> <pre><code>&lt;script&gt; !function(d,s,id){ var js,fjs=d.getElementsByTagName(s)[0]; if(!d.getElementById(id)){ js=d.createElement(s); js.id=id;js.src="//platform.twitter.com/widgets.js"; fjs.parentNode.insertBefore(js,fjs); } }(document,"script","twitter-wjs"); &lt;/script&gt; </code></pre> <p><strong>Google+ async JavaScript:</strong></p> <pre><code>&lt;script type="text/javascript"&gt; (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })(); &lt;/script&gt;` </code></pre>
 

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