Question

jQuery Animated Tabs script has js error due to race condition with other js

Asked by: somnamblst

I have a very stimple jQuery Image Rollover script that does not use $(document).ready(function(){

Works great except when it is placed on a page that has another script, most of the time I get a staus bar error of jQuery undefined in IE, never in FF. The error does not effect functionality.

I tried adding $(document).ready(function(){ but it breaks the function and throws this error in Firebug

tab_change is not defined
onclick(click clientX=0, clientY=0)

Here is the tute I started with
http://peps.ca/blog/animated-javascript-tabs-in-1-line-of-code/

The author has several jQuery entries on his blog, I am starting to wonder if there is a reason why he didn't begin with $(document).ready(function(){ in this example.

Here is my nonworking demo that errors with $(document).ready(function(){ added

http://xsotek.com/demo10/testTabs.html

Or is some sort of timer a better solution?



      

<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   <title>Tabbed Test</title>
    
 
 
   <script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script>
    <style type="text/css">	
	.wrapp {
		position: relative;
		width: 300px;
		margin: 10px;
		text-align: left;
		
	}
	.boxx {
		display: block;
		width: 300px;
		height: 228px;
		border: 1px solid #282B79;
		background-color: #ffffff;
		background-repeat: no-repeat;
	}
	.details {
		position:absolute;
		top:2px;
		margin: 0;
		left:120px;
		width: 180px;
		padding: 4px 1px 4px 1px;
		line-height: 12px;
		color: #ffffff;
	}
	
 
	
	.tabber {
		width: 100%;
		display: block;
		position: absolute;
		margin: 0;
		padding: 0;
		list-style: none;
		float: left;
		font-size: 12px;
		font-family: Arial,Helvetica,sans-serif;
		text-align: center;
		line-height: 10px;
		color: #990000;
		word-spacing: 0.1em;
		font-weight: bold;
	}
	.tabber .tabs{
		display: block;
		position: absolute;
		top: -29px;
		margin: 0;
		padding: 0;
		width: 100%;
		list-style: none;
		float: left;
	}
	.tabber .tabs li a {
		background-color: #f4f4f4;
		padding: 4px;
		border: 1px solid #e1e1e1;
		border-bottom: none;
		float: left;
	}
	.tabber .tabs li {
		float: left;
	}
	.tabber .tabbox {
		float: left;
		width: 100%;
		cursor: hand;
	}
	
	.hide {
		display: none;
	}
	.show {
		display: block;
	}
</style>
 
 <script type="text/javascript" charset="utf-8">
  jQuery.noConflict();
 jQuery(document).ready(function(){
	function tab_change( parent, elm ) {
 		 jQuery('#'+parent+' .show')
			.slideUp('fast', function() {
				 jQuery('#'+elm).slideDown('normal').addClass('show');
			})
			.removeClass('show')
			.addClass('hide');
	}
});
  
 </script>
 
</head>
<body>
 
 <div class="wrapp">
 <div class="tabber">
  
  <ul class="tabs">
   <li>&nbsp; <a  onclick="tab_change('images', 'first')" class="roll">one</a></li>
 
   <li>&nbsp;<a  onclick="tab_change('images', 'second')" class="roll">two</a></li>
   <li>&nbsp;<a  onclick="tab_change('images', 'third')" class="roll">three</a></li>
 
   
  </ul>
<div class="boxx">
  <div class="tabbox" id="images">
   
   <div id="first" class="show">
<img src="one.jpg" width="300" height="228" alt="" border="0">
    <div class="details"><strong>one</strong><br />
 
</div>
   </div>
   
   <div id="second" class="hide">
<img src="two.jpg" width="300" height="228" alt="" border="0">
        <div class="details"><strong>two</strong>
 
</div>
   </div>
   
   <div id="third" class="hide">
<img src="three.jpg" width="300" height="228" alt="" border="0">
        <div class="details"><strong>three</strong><br />
 
</div>
   </div>
   
   </div>
  </div>
  
   </div>
   
  </div>
 
 
</body>
</html>

                                  
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Asked On
2008-05-22 at 19:16:18ID23426447
Topic

JavaScript

Participating Experts
1
Points
500
Comments
8

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Answers

 

by: hieloPosted on 2008-05-22 at 21:30:42ID: 21629432

You are defining function tab_change WITHIN the function that is executed as soon as the document is ready for DOM manipulation. Basically tab_change is "trapped" within the anonymous function executed by the ready event and as soon as that is done executing, tab_change is no longer visible. You need to define tab_change "outside/indepent of" the anonymous function that is being executed by the ready event.

In case you are wondering what that anonymous function is, basically you are executing this:
jQuery(document).ready(   function(){...}   );

the function(){...}   IS the anonymous function, and in what you currently have you are defining  tab_change where the ... are. It does NOT exist outside of that function. That's why when you click on the tabs the function is not found (Hence the reason for the "Object expected" error in IE.

 <script type="text/javascript" charset="utf-8">
  jQuery.noConflict();
 
 
	function tab_change( parent, elm ) {
 		 jQuery('#'+parent+' .show')
			.slideUp('fast', function() {
				 jQuery('#'+elm).slideDown('normal').addClass('show');
			})
			.removeClass('show')
			.addClass('hide');
	}
  
 </script>

                                              
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by: somnamblstPosted on 2008-05-23 at 07:07:49ID: 21632236

Thanks for the explanation. Are you saying I can't use

$(document).ready(function() {
    // put all your jQuery goodness in here.
});

with this particular function?

If not does could I perhaps use a timer event to prevent the jQuery undefined error in IE that is being caused by other script(s) that are higher on the page taking so long to load?

Because when I attempt to use the following function I get an object expected error and the lines being referenced are each of the <a onclick="tab_change('images', ''*')" class="roll">



  <script type="text/javascript" charset="utf-8">
  jQuery.noConflict();
 jQuery(document).ready(function() {
 
	function tab_change( parent, elm ) {
 		 jQuery('#'+parent+' .show')
			.slideUp('fast', function() {
				 jQuery('#'+elm).slideDown('normal').addClass('show');
			})
			.removeClass('show')
			.addClass('hide');
	}
	}); 
  
 </script>

                                              
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by: hieloPosted on 2008-05-23 at 07:48:00ID: 21632597

>>Are you saying I can't use ...with this particular function?
I am NOT saying that in "General terms". But for your specific example, yes, you CANNOT because  tab_change exists only WITHIN the anonymous function that the ready() event  executes.

 

by: somnamblstPosted on 2008-05-23 at 08:27:54ID: 21633015

OK I had a feeling that was why the function I started with did not have $(document).ready(function() {

I am not a programmer so I have to find working examples & attempt to modify to suit my uses. In another show hide function I use  a

setTimeout(function()
{
 jQuery('#slidebar').slideUp(1000);
}, 5000);

Could I use a timer to delay the jQuery function long enough for the other js scripts on the page to load?

function pageLoad()
{
setCurrent();

 

by: hieloPosted on 2008-05-23 at 08:39:58ID: 21633119

I really don't understand what the issue is. I already gave you the answer on the first post. I tried the code below (save it as test.html) and it works fine.

<!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">
<head>
<base href="http://xsotek.com/demo10/testTabs.html"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   <title>Tabbed Test</title>
    
 
 
   <script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script>
    <style type="text/css">	
	.wrapp {
		position: relative;
		width: 300px;
		margin: 10px;
		text-align: left;
		
	}
	.boxx {
		display: block;
		width: 300px;
		height: 228px;
		border: 1px solid #282B79;
		background-color: #ffffff;
		background-repeat: no-repeat;
	}
	.details {
		position:absolute;
		top:2px;
		margin: 0;
		left:120px;
		width: 180px;
		padding: 4px 1px 4px 1px;
		line-height: 12px;
		color: #ffffff;
	}
	
 
	
	.tabber {
		width: 100%;
		display: block;
		position: absolute;
		margin: 0;
		padding: 0;
		list-style: none;
		float: left;
		font-size: 12px;
		font-family: Arial,Helvetica,sans-serif;
		text-align: center;
		line-height: 10px;
		color: #990000;
		word-spacing: 0.1em;
		font-weight: bold;
	}
	.tabber .tabs{
		display: block;
		position: absolute;
		top: -29px;
		margin: 0;
		padding: 0;
		width: 100%;
		list-style: none;
		float: left;
	}
	.tabber .tabs li a {
		background-color: #f4f4f4;
		padding: 4px;
		border: 1px solid #e1e1e1;
		border-bottom: none;
		float: left;
	}
	.tabber .tabs li {
		float: left;
	}
	.tabber .tabbox {
		float: left;
		width: 100%;
		cursor: hand;
	}
 
	
	.hide {
		display: none;
	}
	.show {
		display: block;
	}
</style>
 
 <script type="text/javascript" charset="utf-8">
  jQuery.noConflict();
 jQuery(document).ready(function(){});
	function tab_change( parent, elm ) {
 		 jQuery('#'+parent+' .show')
			.slideUp('fast', function() {
				 jQuery('#'+elm).slideDown('normal').addClass('show');
			})
			.removeClass('show')
			.addClass('hide');
	}
 
  
 </script>
 
</head>
<body>
 
 
 <div class="wrapp">
 <div class="tabber">
  
  <ul class="tabs">
   <li>&nbsp; <a  onclick="tab_change('images', 'first')" class="roll">one</a></li>
 
   <li>&nbsp;<a  onclick="tab_change('images', 'second')" class="roll">two</a></li>
   <li>&nbsp;<a  onclick="tab_change('images', 'third')" class="roll">three</a></li>
 
   
  </ul>
<div class="boxx">
  <div class="tabbox" id="images">
   
   <div id="first" class="show">
<img src="one.jpg" width="300" height="228" alt="" border="0">
    <div class="details"><strong>one 
 
 
 
</strong><br />
 
</div>
   </div>
   
   <div id="second" class="hide">
<img src="two.jpg" width="300" height="228" alt="" border="0">
        <div class="details"><strong>two
 
</strong>
 
</div>
   </div>
   
   <div id="third" class="hide">
<img src="three.jpg" width="300" height="228" alt="" border="0">
        <div class="details"><strong>three
 
</strong><br />
 
 
 
</div>
   </div>
   
      
   
 
 
 </div>
  </div>
  
   </div>
   
  </div>
 
 
 
 
 
 
 
 
</body>
</html>
                                              
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by: somnamblstPosted on 2008-05-23 at 09:11:44ID: 21633417

My problem is that when this widget is implemented on a page that has multiple js files called before it that it causes a js error in the status bar of jQuery is undefined. I believe the error is due to the other scripts loading before jQuery is fully loaded, thus triggering the error. Since I am the cause of the error I am trying to come up with a solution. That is why I was seeking either a correct implemenation of  
jQuery(document).ready(function() {

or some sort of timer to delay the function from accessing jQuery.js

I am sorry if I was not clear enough as to what error I was trying to get rid of.

 

by: hieloPosted on 2008-05-23 at 09:21:51ID: 21633503

>>My problem is that when this widget is implemented on a page that has multiple js files called before it that it causes a js error in the status bar of jQuery is undefined. I believe the error is due to the other scripts loading before jQuery is fully loaded

If that is the case then you need to load you jQuery file FIRST.

 

by: somnamblstPosted on 2008-05-23 at 11:15:12ID: 21634395

Thanks! I just checked with one of the developers that controils the templates that my jQuery Tabs widget gets inserted into via a 3rd party include for tracking purposes and he said that should work & he will implement.

20120131-EE-VQP-002

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