I try to make an ajax function in wordpress and I enqueued my script and declared my variables like this in functions.php:

function my_enqueue_scripts() {
        get_template_directory_uri() . '/js/load_post.js', 
        array( 'jquery' ), 
            'url' => admin_url( 'admin-ajax.php' ), 
            'nonce' => wp_create_nonce( 'ajax_nonce' )
add_action('wp_enqueue_scripts', 'my_enqueue_scripts');

load_post.js :

jQuery(document).ready(function($) { 

    jQuery('#next-container').click(function($) {

        var $container = jQuery('#isotope-container');
        var IDs = [];
        jQuery(".element").each(function($){ IDs.push(this.id); });


            type: 'POST',
            url: wp_ajax.url,
            dataType: 'html',
            data: {  action: 'load_post',  
                     ajax_nonce: wp_ajax.nonce,
                     post_ids: IDs,  
                  },  //{'post_ids[]': IDs },
            success: function(data) {
                    $container.isotope( 'insert', $(data)); 

However in my load_post.js I can't get wp_ajax variable. I don't see any variable added in the head section of my source code in google chrome or IE.

Where comes from my problem? Do I miss something?

  • Please add your javascript code to the question as well. – mrwweb Jul 10 '13 at 13:42

Your code looks correct.
alert(wp_ajax.nonce); should display the nonce.
You can also verify the existence of the wp_ajax object via console.log(wp_ajax) in your browser's Javascript console.

wp_localize_script adds the object(s) to the footer (a call to wp_footer() should be present in the theme's footer.php file).
It'll look like so:

<script type="text/javascript">
    /* <![CDATA[ */
    var wp_ajax = {"url":"http://example.com","nonce":"123XYZ"};
    /* ]]> */
  • Thanks a lot!! It's because I forget to add wp_footer() ! I was thinking it was in wp_head()! Now I see the variable in the footer in the source code! But I have a problem with my javascript... here $container.isotope( 'insert', $(data)) : Uncaught TypeError: object is not a function – freaky Jul 10 '13 at 13:55
  • 1. As a general note: That's a javascript error unrelated to WordPress and would hence be on-topic on Stack Overflow. | 2. $(data) is likely supposed to be a variable. Currently your passing data to the jQuery object ($). You likely want $data. Which, as an aside, goes to show why prefixing JS variables with a dollar sign is not a good practice, IMHO. | 3. isotope.metafizzy.co/docs/adding-items.html#insert_method – Johannes Pille Jul 10 '13 at 14:05
  • This script works great in my html template but know with wordpress it don't works... – freaky Jul 10 '13 at 14:07
  • With or without $ prefix I've got problem. I don't have any problem with this without wordpress. It seems to comes from wordpress and the way that jquery prefix is used... – freaky Jul 10 '13 at 15:01
  • Fair enuff, that's likely a correct guess. $ is not a "prefix" for jQuery, it's an alias. The name of the jQuery object is jQuery - use that instead, you'll be good. For more info: Refer to this answer. – Johannes Pille Jul 10 '13 at 15:40

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