Learning jQuery

A few weeks ago I wrote about how to use jQuery and a couple modules from the Interface plugin suite to automatically have same-page links scroll to their target location when clicked (Animated Scrolling for Same-Page Links). Well, now that jQuery 1.2 is out, and I’ve successfully upgraded this site to it without a hitch, we can do the same thing with jQuery core alone.

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It’s been so long since I last posted a tutorial here that I’m afraid everyone might have forgotten about the place. For the past few months, there has been a little “Page Contents” menu at the top-right corner of some of the pages on this site — actually, any page that has more than one <h2> elements in the main content area. In this entry, I’d like to demonstrate how to create an automatic page contents list using jQuery.

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A few weeks ago I wrote about two ways we can achieve the “accordion menu” effect, and I promised to describe a third option. Well, this is it, Option 3. But first, here is a list of my other show-hide-toggle entries, as well as Jörn Zaefferer’s accordion menu plug-in:

• More Showing, More Hiding
• Slicker Show and Hide
• Basic Show and Hide
• Accordion Menu Plugin

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We’ve received a number of comments recently from people looking for variations on the showing and hiding theme. For the basics, you can take a look at two earlier entries, Basic Show and Hide and Slicker Show and Hide.

For a full-blown plugin solution with lots of options, look no further than Jörn Zaefferer’s Accordion Menu. But if you want to try some showing and hiding on your own, read on.

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Here is a quick trick for getting an effect to delay without using setTimeout.

Let’s say, for example, that I want to show an alert message on the page every time a user clicks on a certain button. But I don’t want it to stay there forever; I want it to go away a few seconds later. You know, like the way they do in all of those crazy Web 2.0 sites.

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A couple weeks ago someone on the jQuery discussion list asked if someone could reproduce a rotating headline box in which the headlines, in succession, scroll up into the box, pause, and then scroll up out of the box. Since I already had some code for rotating images on a page, I decided to recycle it and take the challenge.

Here is the finished product. (Please note that if you are looking at this in a feed reader, you won’t be able to see the effect. )

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