Archive for July, 2008

A Simple jQuery Slideshow

Simple jQuery Slideshow Tutorial

In the interest of following jQuery’s motto of “writing less and doing more,” let’s write a simple slideshow using jQuery, JavaScript and a bit of CSS.

For starters, our main goal should be keeping the markup as clean as possible: <div id=”slideshow”> <img src=”img/img1.jpg” alt=”" class=”active” /> <img src=”img/img2.jpg” alt=”" /> <img src=”img/img3.jpg” alt=”" /> </div> Now let’s use CSS to position the images on top of each other and bring the active image to the images on top of each other and bring the active image to the top level with z-index:

5 Performance Tuning Tricks for jQuery

5 Performance Tuning Tricks for jQuery

In a recent post, I wrote that developers should better optimize their JavaScript. Well, that’s easier said than done, so I’d like to get down to the nitty-gritty and talk specifically about optimizing jQuery. Please note that this is not about performance tuning of the jQuery library, rather it is about better engineering the code we use to interact with it. If you’re not a jQuery programmer, and you have no interest in joining the fad, don’t worry—most of the concepts here apply to JavaScript and general programming as well.

1. Beware of class-only selectors

A great part about using a JavaScript library like jQuery is its selectors. But before you use them all over the place, stop to think: what are the processing costs?

Basically, jQuery defines all the elements on a page as a huge JavaScript object, … Read more…