Support

October 22, 2013 at 12:43 pm

Usually, this is caused by the theme not loading jQuery correctly or not using the no-conflict wrapper. (http://codex.wordpress.org/Function_Reference/wp_enqueue_script#jQuery_noConflict_Wrappers) When EE then uses jQuery in the WP prescibed manner, it then creates a javascript error causing the JS slider or dropdowns to not work.

October 22, 2013 at 2:52 pm

If you use a tool like FireBug and view the page you’ll JavaScript errors on the page that will typically output something like:

$ is not defined

The link that Sidney posted has code examples that show how the scripts in the theme and plugins should be written. In a nutshell the difference is subtle, but it can make a big difference.

*Correct*

jQuery(document).ready(function($){
     $(#somefunction) ...
});

*Incorrect*

$(document).ready(function(){
     $(#somefunction) ...
});

Here is another guide that explains this a bit more in detail:

http://digwp.com/2011/09/using-instead-of-jquery-in-wordpress/

More resources here:

http://codex.wordpress.org/Function_Reference/wp_enqueue_script#Resources

If you post a link to the page where this is happening we can investigate further and if there are scripts that need no-conflict wrappers we’ll let you know which ones they are.

October 22, 2013 at 7:56 pm

Hi David,

It turns out that your theme is in real need of updating. It’s running a version of the jQuery library that is almost 4 years old (jQuery 1.4.2).

There are functions and methods that WordPress and Event Espresso use (like the .on() method) that aren’t available in the older versions of jQuery. The theme really should just use the version of jQuery that is included with WordPress (which is ~ version 1.ten now). Does the theme author have an update for this theme?

October 23, 2013 at 11:09 am

Hi David,

Event Espresso’s scripts depend on the version of jQuery that WP ships with.

What might work is to remove the theme’s version of jQuery and make the theme load up the version of the jQuery library that WordPress ships with. Then the scripts in the theme that depend on jQuery may need to be updated to be compatible with the current jQuery library if they have any deprecated functions.

Here is a list of deprecated functions from the jQuery library. If your theme’s scripts are using any of these they will also need to be updated to their newer versions:

http://api.jquery.com/category/deprecated/