Solved

jQuery: Animate height to auto

Posted on 2010-09-21
1
1,255 Views
Last Modified: 2012-05-10
Using jQuery, how can I animate the height to auto?

This does not work:
.animate({height: 'auto'}, 900);
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Demo</title>

<style type="text/css">
#leadForm1 {height: 0; overflow: hidden; width: 700px;}
</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script>

<script type="text/javascript">
/* <![CDATA[ */

function CreateText($min,max)
{
 var l= l = ('Lorem ipsum ');
 var validchars = "eir mod tem por invidunt ut lab ore dol ore magna aliqu yam erat sed diam voluptu ";
  var minsize, maxsize, count, actualsize;
  minsize = Math.floor(Math.random()*100);
  maxsize = Math.floor(Math.random()*9000);
  if (maxsize<(Math.ceil(maxsize * 1.5)))
  var str = (Math.ceil(maxsize * 1.5));
  actualsize = Math.floor(Math.random() * (maxsize - minsize + 1)) + minsize;
    for (count = 1; count<actualsize; count++)
    l=l+validchars.charAt(Math.floor(Math.random()* validchars.length));
  return l;
}

$(document).ready(function(){

$('#rq1').click(function() {
  $('#leadForm1').html(CreateText());
  $('#leadForm1').animate({height: '650px'}, 900);
  $(this).css( {visibility: "hidden"})
  return false;
});

});

/* ]]> */ 
</script> 

</head>
<body>

<p><a href="#" id="rq1">Click Here</a></p>

<div id="leadForm1"></div>
<hr />
<h1>Hello World</h1>
</body>
</html>

Open in new window

0
Comment
Question by:hankknight
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 2

Accepted Solution

by:
amischol earned 500 total points
ID: 33730060
The animate jQuery extension works by pixels or relative size, but "auto" is not a pixel size.

First of all you must know what's the original height of the element.

window.originalHeight = $('#leadForm1').height();

$('#leadForm1').animate({height: '650px'}, 900);

$('#leadForm1').animate({height: window.originalHeight}, 900);
0

Featured Post

Get HTML5 Certified

Want to be a web developer? You'll need to know HTML. Prepare for HTML5 certification by enrolling in July's Course of the Month! It's free for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Chart.js, used properly, can visually add a difference to your charting applications. It engages your visitors and allows them to interact with data they otherwise wouldn't be able to without expensive and complicated systems. For this…
How to build a simple, quick and effective accordion menu using just 15 lines of jQuery and 2 css classes
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…
Suggested Courses

632 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question