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JavaScript Perfromance Tip- Don’t Test Against obj.length. Test Against a Local Variable.
I saw it yesterday in some code I was debugging and I realized I’ve become hyper sensitive to this common pattern: var anchors = document.getElementsByTagName(‘a’); if (anchors.length > 0){ for (var i=0; i < anchors.length; i++) { addEvent( anchors[i], 'click', trackLinks ); }; }; Why am I sensitive to it? Well, what are some of…
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JavaScript Library Showdown. Video of my CDIA Presentation is Live. Check It Out!
Thanks to Jason Duclos, my presentation from a couple of weeks ago is live. In it I compare standard JavaScript DOM methods to YUI, jQuery, Dojo and Prototype/Scriptaculous. JavaScript Library Showdown from rob larsen on Vimeo. Here’s the deck. Jason is the man for putting this together, by the way.
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Presentation Done. Thanks to all Who Attended.
My presentation went well, I think. It started a little later than I would have liked, and I didn’t have any water (insane? yes.) but overall it was a lot of fun. People seemed interested, which is the important part. The really interesting news is that the presentation was recorded, so I should be able…
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getElementsByTagNameNS. Now I Know. And Knowing is Half the Battle.
Yesterday I was wondering why obj.getElementsByTagName wasn’t working in Safari/WebKit on a tag with a namespace prefix. I wondered, aloud, whether or not it was just something I was ignorant of. It turns out that was the case. Dom Level 2 added new namespace specific methods to search through documents or document fragments for tags…
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getElementsByTagName Namespace Prefix Strangeness in Safari/Chrome/WebKit
Is It Me or the Browser? I had a Safari bug on a project I’m rushing to get out the door. We’re using a Flickr feed to populate a div with link+thumbnail to some flickr images. In Firefox/Internet Explorer I simply did the following to build the links: flickr : function(obj) { //get the full…
