jQuery loading twice

Question

I am creating joomla templates and want to add a simple jquery script. The problem is that there are other joomla extensions like GCalendar which load their own jquery.

This means:

If I add <script src="http://code.jquery.co.... it will conflict with the jquery of other extensions
If I don't add that code, the new script will not work if other jquery loading extensions are not installed.

Any ideas?

Seth · Accepted Answer · 2012-01-19 19:21:37Z

1

If you are hosting the library yourself you could wrap the entire library with an

if ( !jQuery ) {
    // jQuery Library
}

Or you could look into a library like RequireJS to handle your dependencies.

answered Jan 19, 2012 at 19:21

Seth

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2 Comments

user1159265 Over a year ago

the if didn;t work or I don't know how to use it. How can I add something like "if jquery is loaded do nothing but if there is no jquery load jquery"

user1159265 Over a year ago

Currently my code looks like this: ` <script> if(!window.jQuery) { var script = document.createElement('script'); script.type = "text/javascript"; script.src = "code.jquery.com/jquery-latest.js"; document.getElementsByTagName('head')[0].appendChild(script); } </script> <script type="text/javascript">var $j = jQuery.noConflict();</script> <script type="text/javascript" src="<?php echo $this->baseurl ?>/templates/<?php echo $this->template ?>/css/myjqueryscript.js"></script>`

hunter · Accepted Answer · 2012-01-25 18:13:16Z

1

You can check if jQuery is defined in script and load it if it has not been loaded prior.

You may run into functionaliy issues if the previously loaded version of jQuery is not a version you are supporting

<script>window.jQuery || document.write(
        '<script src="/scripts/jquery-1.6.2.min.js"><\/script>')
</script>

edited Jan 25, 2012 at 18:13

answered Jan 19, 2012 at 19:22

hunter

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1 Comment

user1159265 Over a year ago

can you tell me exactly how to do this?

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