First off I know there are tons of other "jQuery is not defined" threads and I have gone through them all and can't seem to find a solution. Trying to add jQuery functionality to a custom made theme nav and I cannot seem to get around this problem. Code is working fine in jsfiddle https://jsfiddle.net/TonyTheOnly/h7xwcb8h/

But when I try to attempt this in my wordpress theme i get the error "jQuery is not defined"



<body <?php body_class( $awesome_classes ); ?>>
    <div class="topBar">
        <img src="<?php header_image();?>" height="120px;" width="100px;" alt=""/ class="siteLogo">
    <div class="topBarMiddle">
        <p>español | ENGLISH</p>
      <div class="topBarRight">  
        <a class="burger-nav"></a>
                <li><a href="#">Home</a></li>
                <li><a href="#">About</a></li>
                <li><a href="#">Services</a></li>
                <li><a href="#">Blog</a></li>
                <li><a href="#">Contact</a></li>



function paramo_script_enqueue() {

    wp_enqueue_style('customstyle', get_template_directory_uri() . '/css/paramo.css', array(), '1.0.0', 'all');
    wp_enqueue_script('customjs', get_template_directory_uri() . '/js/paramo.js', array('jQuery'), '1.0.0', true);

add_action('wp_enqueue_scripts', 'paramo_script_enqueue');
function paramo_theme_setup() {


    register_nav_menu('primary', 'Primary Header Navigation');
    register_nav_menu('secondary', 'Footer Navigation');

add_action('init', 'paramo_theme_setup');



/*global $, jQuery, alert*/

jQuery(function () {
    "use strict";

    $(".burger-nav").on("click", function () {

        $("nav ul").toggleClass("open");

Any help is greatly appreciated and thank you for your time!

  • Note that if you fix this there'll be a second issue where $ is undefined, it should be jQuery( "nav ul") not $( "nav ul" ). You've also setup your initial function incorrectly, look into jQuery(document).ready
    – Tom J Nowell
    Nov 3, 2017 at 1:34
  • I want to add that you should always use document ready to be safe and use an anonymous function where you pass in jQuery to be mapped to $ combined with document ready. Like so: jQuery(document).ready(function($) { // $ Works! You can test it with next line if you like // console.log($); }); Oct 24, 2018 at 16:56

2 Answers 2


The dependencies argument of wp_enqueue_script() is case sensetive:

wp_enqueue_script('customjs', get_template_directory_uri() . '/js/paramo.js', array('jQuery'), '1.0.0', true);

That array('jQuery') needs to be array( 'jquery' ).

You can see the handles for bundled scripts on the documentation page for wp_enqueue_script(): https://developer.wordpress.org/reference/functions/wp_enqueue_script/

  • 1
    There a few things similar to how a man feels when he realizes case sensitivity caused all of his anguish. haha Thank you! Also was doing the $(document).ready(function) and changed it to the wp shortcode jQuery(document).ready(function){ Nov 3, 2017 at 2:28

I can't comment quite yet but it's a good idea to move away from using the ready method to load your jQuery script. Start your WordPress scripts with jQuery(function(){code here}); jQuery 3.x deprecates the formerly acceptable jQuery(document).ready(function()..... More info here

  • Thanks, after about 30 minutes of searching I found this answer, which finally explains why my JQuery code wasn't working.
    – clayRay
    Apr 3, 2020 at 6:52
  • 1
    @clayRay Glad it helped!
    – jdp
    Apr 3, 2020 at 11:46

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