How to add a class to submenu items when they are clicked https://wpsites.net/?p=114703

custom-script.js

jQuery(document).ready(function($) {
    // Add click event to submenu items
    $('.sub-menu li').on('click', function() {
        // Remove 'active' class from all submenu items
        $('.sub-menu li').removeClass('active');
        
        // Add 'active' class to the clicked submenu item
        $(this).addClass('active');
    });
});