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jQuery expand/collapse

xill2678 asked
Medium Priority
Last Modified: 2012-05-06
i have a code snippet i picked up from somewhere (i can't remember where now) but i'd like to add a simple fading effect to it. this snippet uses jQuery's slideToggle function to simply expand & contract a div. I'd like to also add jQuery's fading function to this, but i havent been able to figure out how (i'm new to this stuff). I'd like the div to fade in when expanding, and fade out when contracting. can anyone give me any pointers on this? thanks
<script type="text/javascript" src="scripts/jquery.js"></script>
<script type="text/javascript">
$("#trigger").click(function(event) {event.preventDefault();$("#hidden").slideToggle();});
<a href="# id="trigger">expand/contract div below</a>
<div id="hidden" style="display:none;">
     content to fade here

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Analyst developer
Using toggle will re(set) opacity to the element.
It also (re)sets the width and height of the element.

So you could use toggle optionally with a certain speed ("fast", "slow" or "normal" or with a defined number of milliseconds.

However, if you don't want the width being (re)set, you can use animate.

You could see the difference in bahaviours with an element with 'lots' of content.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
	<script type='text/javascript' src='http://jqueryjs.googlecode.com/files/jquery-1.3.1.min.js'></script>
	<script type='text/javascript'>
		$(function() {
			$("#trigger").click(function(event) {
				event.preventDefault(); $("#hidden").toggle("slow");
			$("#trigger2").click(function(event) {
				event.preventDefault(); $("#hidden").animate({ "height": "toggle", "opacity": "toggle" });
<a href="#" id="trigger">expand/contract using toggle</a>
<a href="#" id="trigger2">expand/contract using animate</a>
<div id="hidden" style="display:none;">
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Curabitur tempor hendrerit est. Pellentesque pulvinar pharetra purus. Pellentesque id metus nec enim rhoncus lacinia. Quisque massa lectus, adipiscing vitae, tristique sit amet, adipiscing a, mauris. Proin tortor nunc, volutpat non, facilisis et, suscipit a, tortor. Etiam tempus. In hac habitasse platea dictumst. Aenean eget sapien. Vestibulum ut est a erat pretium tincidunt. Fusce ac purus nec elit bibendum condimentum. Phasellus commodo commodo justo. Proin purus sem, volutpat a, facilisis vitae, malesuada vitae, eros. Aliquam porttitor, felis at molestie tempus, lacus orci vestibulum dolor, vel tincidunt purus dui in metus. Aliquam nunc sem, rutrum nec, adipiscing gravida, ultricies id, erat. Suspendisse potenti. Curabitur fringilla. Morbi sit amet est et tellus tristique molestie. Duis luctus. Ut elit. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae;

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im still learning jquery and everything it has built in, but the animate function you provided is exactly what i was looking for! funnily enough other plugins i ran across took 50+ lines of code even with jquery as a base. this is sweet and simple and does just what i need it to without all the fluff or useless options. thank you so much! :)
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