[Resolved] Deregister Jquery on Specific Page

[Zach]

Trying to deregister wp-includes jquery and jquery-migrate on specific pages to load a different jquery library. Searched all over but couldn’t figure it out so I thought I’d ask you.

What handles should I use to deregister wordpress’ jquery scripts? ‘jquery-ui-core’ doesnt work and ‘jquery’ deregisters all jquery libraries including the ones im trying to add.

Are the handles my issue or maybe i am not properly reregistering the scripts after deregistering ‘jquery’

Here is my code: (feel free to laugh if it is terrible, I’m new to PHP)

// Loads necessary CCH javascript to CCH content pages

function wpdocs_dequeue_script() {
	if (is_page('tools')) 
   wp_deregister_script( 'jquery');
}
add_action( 'wp_print_scripts', 'wpdocs_dequeue_script', 100);

function load_scripts() {
    global $post;

    if( is_page() || is_single() )
    {
        switch($post->post_name) // post_name is the post slug which is more consistent for matching to here
        {
            case 'calendar':
				wp_register_script('jquery1.4', 'http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js', array('jquery'), '', true);
                wp_enqueue_script('jquery1.4');
				wp_register_script('jqueryui', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-ui.min.js', array('jquery'), '', true);
                wp_enqueue_script('jqueryui');
				wp_register_script('cch_econtent', '/cch_js/cch_econtent_js.js', array('jquery'), '', true);
                wp_enqueue_script('cch_econtent');
                wp_register_script('jMonthCalendar', '/cch_js/jMonthCalendar.js', array('jquery'), '', true);
                wp_enqueue_script('jMonthCalendar');
                wp_register_script('cluetip', '/cch_js/jquery.cluetip.js',  array('jquery'), '', true);
                wp_enqueue_script('cluetip');
                wp_register_script('bigiframe', '/cch_js/jqpopup/jquery.bgiframe.min.js', array('jquery'), '', true);
                wp_enqueue_script('bigiframe');
                wp_register_script('popupdnr', '/cch_js/jqpopup/jqDnR.min.js',  array('jquery'), '', true);
                wp_enqueue_script('popupdnr');
                wp_register_script('jqpopup', '/cch_js/jqpopup/jquery.jqpopup.min.js',  array('jquery'), '', true);
                wp_enqueue_script('jqpopup');
                break;
            case 'tools':
                wp_register_script('jquery1.4', 'http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js', array('jquery'), '', false);
                wp_enqueue_script('jquery1.4');
				wp_register_script('jqueryui', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-ui.min.js', array('jquery'), '', false);
                wp_enqueue_script('jqueryui');
				wp_register_script('cch_econtent', 'http://zjtmedia.com/cch_js/cch_econtent_js.js', array('jquery'), '', false);
                wp_enqueue_script('cch_econtent');
                break;
            case 'news-alerts':
                wp_register_script('jquery1.4', 'http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js', array('jquery'), '', false);
                wp_enqueue_script('jquery1.4');
				wp_register_script('jqueryui', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-ui.min.js', array('jquery'), '', false);
                wp_enqueue_script('jqueryui');
				wp_register_script('cch_econtent', '/cch_js/cch_econtent_js.js', array('jquery'), '', false);
                wp_enqueue_script('cch_econtent');
                break;
        }
    } 
}

add_action('wp_enqueue_scripts', 'load_scripts', 92);

[Tom]

It looks like everything is working except for removing jQuery.

Have you tried adding wp_deregister_script( 'jquery'); into the second function along with enqueuing the other jQuery versions?

Also, changing the jQuery version like this usually isn’t a great idea – it could cause conflicts with your plugins.

[Zach]

Ah I thought wp_deregister_script needed to be a separate function. I will try it as a single function.

And yes I know changing jquery version is a bad idea. Elementor is disabled on all pages ive tried this on. But client paid a ton for this suite of java plugins and content for his accounting firm and insists it integrates with his current wordpress site

[Zach]

Figured it out! Thanks to your help. Deregistering in the same function worked and made the code a lot cleaner. My problem was I deregistered ‘jquery’ then registered ‘jquery1.4’ but my other scripts dependencies were array(‘jquery’).

Here’s what worked:

function load_scripts() {
    global $post;

    if( is_page() || is_single() )
    {
        switch($post->post_name) // post_name is the post slug which is more consistent for matching to here
        {
case 'tools':
				wp_deregister_script('jquery');

				wp_register_script('jquery',  'http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js', array(), '', false);
				wp_register_script('jqueryui', 'http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/jquery-ui.min.js', array('jquery'), '', false);
				wp_register_script('cch_econtent', 'http://zjtmedia.com/cch_js/cch_econtent_js.js', array('jquery'), '', false);
				
				wp_enqueue_script('jquery');
				wp_enqueue_script('jqueryui');
				wp_enqueue_script('cch_econtent');
                break;

[Tom]

Glad you got it working! 🙂

[Author]

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