Code: // Enqueue custom JavaScript for the coupon apply functionality function enqueue_custom_coupon_script() { // Enqueue the custom inline JavaScript for handling the coupon code ?> <script type="text/javascript"> jQuery(document).ready(function($) { $('.e-apply-coupon').on('click', function(event) { event.preventDefault(); // Prevent default form submission let couponCode = $('#coupon_code').val(); // Get the entered coupon code if (couponCode) { // AJAX call to apply the coupon $.ajax({ ...