Typeerror: $ Is Not a Function Wordpress

Uncaught TypeError: $ is not a function in WordPress

There are two solution for this:

#1

Repalce all $ to jQuery in your code.

#2

Or a Simple way.

just assign jQuery to $ as a global variable like following on the top of your .js file and all your code will work fine.

var $ = jQuery;

I hope this works for you.

$ is not a function after wordpress 5.3 update

It might be because of this:
https://core.trac.wordpress.org/ticket/48568

If so, then wrapping your code, like in the answer linked by Spencer Stewart might help.

<script> 
jQuery(function($) {

YOUR CODE GOES HERE

});
</script>

WordPress page: Uncaught TypeError: $ is not a function

load does not return a reference to jQuery like ready() does. It is the event object which is not a function.

(function($){
  jQuery(window).load(function() {
    console.log($);
  });
})(jQuery);

FIXED: Wordpress site Uncaught TypeError: jQuery(...).live is not a function causing images with JS to not show

Wordpress 5.5 stopped using jQuery migrate. This change has been causing problems with old plugins and themes. If you are noticing issues after upgrading to Wordpress 5.5, installing this plugin might fix it: https://wordpress.org/plugins/enable-jquery-migrate-helper/

Though, ultimately a better solution would be to either upgrade your current plugins and themes to versions that do not rely on jQuery migrate. Or, if that is not possible, try to move away from those plugins to ones that do not require jQuery migrate. If you don't, you will likely run into compatibility issues in the future or, even worse, security vulnerabilities from these outdated plugins/themes.

UPDATE: Sep 18, 2020

I looked at the source code for the Enable jQuery Migrate Helper plugin and it has this condition for running:

if ( version_compare( $GLOBALS['wp_version'], '5.6-alpha', '<' ) && ! class_exists( 'jQuery_Migrate_Helper' ) ) {
    include_once __DIR__ . '/class-jquery-migrate-helper.php';
    add_action( 'plugins_loaded', array( 'jQuery_Migrate_Helper', 'init_actions' ) );
}

So, the plugin will only work up to, and including, Wordpress 5.5. Once Wordpress hits version 5.6-alpha, it will stop working.

UPDATE: Feb 15, 2021

The plugin code has been updated to work past Wordpress 5.6. However, at and after version 5.6, it will include jquery-migrate-3.3.2 instead of jquery-migrate-1.4.1 and it includes a lot fewer files (mostly jquery-ui scripts). If you want to continue using the older version of jquery, there are a couple options.

Option A. You could copy the jquery migrate plugin to a new folder (basically make it your own plugin), rename it, edit the class-jquery-migrate-helper.php file, find this line in the replace_scripts function:

if ( version_compare( $GLOBALS['wp_version'], '5.6-alpha', '<' ) || 'yes' === get_option( '_jquery_migrate_downgrade_version', 'no' ) ) {

And replace it with:

if(true) {

This will cause the plugin to always install the old version of jquery.

Option B. Create a new plugin that just includes the old jquery files by doing the following:

1. Create a new plugin.
2. Copy all of the enable-jquery-migrate-helper/js files from the jquery migrate plugin to the js/ folder in your new plugin.
3. Add this code to your plugin file:

add_action('wp_default_scripts', function ($scripts) {
    $setScripts = function($scripts, $handle, $src, $deps = [], $ver = false, $in_footer = false) {
        $script = $scripts->query( $handle, 'registered' );

        if ( $script ) {
            // If already added
            $script->src  = $src;
            $script->deps = $deps;
            $script->ver  = $ver;
            $script->args = $in_footer;

            unset( $script->extra['group'] );

            if ( $in_footer ) {
                $script->add_data( 'group', 1 );
            }
        } else {
            // Add the script
            if ( $in_footer ) {
                $scripts->add( $handle, $src, $deps, $ver, 1 );
            } else {
                $scripts->add( $handle, $src, $deps, $ver );
            }
        }
    };

    $assets_url = $assets_url = plugins_url( 'js/', __FILE__  );

    $setScripts( $scripts, 'jquery-migrate', $assets_url . 'jquery-migrate/jquery-migrate-1.4.1-wp.js', array(), '1.4.1-wp' );
    $setScripts( $scripts, 'jquery-core', $assets_url . 'jquery/jquery-1.12.4-wp.js', array(), '1.12.4-wp' );
    $setScripts( $scripts, 'jquery', false, array( 'jquery-core', 'jquery-migrate' ), '1.12.4-wp' );
    $setScripts( $scripts, 'jquery-ui-core', $assets_url . 'jquery-ui/core.min.js', array( 'jquery' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-core', $assets_url . 'jquery-ui/effect.min.js', array( 'jquery' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-blind', $assets_url . 'jquery-ui/effect-blind.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-bounce', $assets_url . 'jquery-ui/effect-bounce.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-clip', $assets_url . 'jquery-ui/effect-clip.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-drop', $assets_url . 'jquery-ui/effect-drop.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-explode', $assets_url . 'jquery-ui/effect-explode.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-fade', $assets_url . 'jquery-ui/effect-fade.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-fold', $assets_url . 'jquery-ui/effect-fold.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-highlight', $assets_url . 'jquery-ui/effect-highlight.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-puff', $assets_url . 'jquery-ui/effect-puff.min.js', array( 'jquery-effects-core', 'jquery-effects-scale' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-pulsate', $assets_url . 'jquery-ui/effect-pulsate.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-scale', $assets_url . 'jquery-ui/effect-scale.min.js', array( 'jquery-effects-core', 'jquery-effects-size' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-shake', $assets_url . 'jquery-ui/effect-shake.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-size', $assets_url . 'jquery-ui/effect-size.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-slide', $assets_url . 'jquery-ui/effect-slide.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-effects-transfer', $assets_url . 'jquery-ui/effect-transfer.min.js', array( 'jquery-effects-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-accordion', $assets_url . 'jquery-ui/accordion.min.js', array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-autocomplete', $assets_url . 'jquery-ui/autocomplete.min.js', array( 'jquery-ui-menu', 'wp-a11y' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-button', $assets_url . 'jquery-ui/button.min.js', array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-datepicker', $assets_url . 'jquery-ui/datepicker.min.js', array( 'jquery-ui-core' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-dialog', $assets_url . 'jquery-ui/dialog.min.js', array( 'jquery-ui-resizable', 'jquery-ui-draggable', 'jquery-ui-button', 'jquery-ui-position' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-draggable', $assets_url . 'jquery-ui/draggable.min.js', array( 'jquery-ui-mouse' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-droppable', $assets_url . 'jquery-ui/droppable.min.js', array( 'jquery-ui-draggable' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-menu', $assets_url . 'jquery-ui/menu.min.js', array( 'jquery-ui-core', 'jquery-ui-widget', 'jquery-ui-position' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-mouse', $assets_url . 'jquery-ui/mouse.min.js', array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-position', $assets_url . 'jquery-ui/position.min.js', array( 'jquery' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-progressbar', $assets_url . 'jquery-ui/progressbar.min.js', array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-resizable', $assets_url . 'jquery-ui/resizable.min.js', array( 'jquery-ui-mouse' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-selectable', $assets_url . 'jquery-ui/selectable.min.js', array( 'jquery-ui-mouse' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-selectmenu', $assets_url . 'jquery-ui/selectmenu.min.js', array( 'jquery-ui-menu' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-slider', $assets_url . 'jquery-ui/slider.min.js', array( 'jquery-ui-mouse' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-sortable', $assets_url . 'jquery-ui/sortable.min.js', array( 'jquery-ui-mouse' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-spinner', $assets_url . 'jquery-ui/spinner.min.js', array( 'jquery-ui-button' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-tabs', $assets_url . 'jquery-ui/tabs.min.js', array( 'jquery-ui-core', 'jquery-ui-widget' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-tooltip', $assets_url . 'jquery-ui/tooltip.min.js', array( 'jquery-ui-core', 'jquery-ui-widget', 'jquery-ui-position' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-ui-widget', $assets_url . 'jquery-ui/widget.min.js', array( 'jquery' ), '1.11.4-wp', 1 );
    $setScripts( $scripts, 'jquery-touch-punch', false, array( 'jquery-ui-widget', 'jquery-ui-mouse' ), '0.2.2', 1 );
}, -10);

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