Ajax Add to Cart Button for Single Products

// Enable AJAX add to cart for single product pages
add_filter( 'woocommerce_is_sold_individually', '__return_false' );
add_action( 'wp_footer', 'woocommerce_ajax_add_to_cart_script' );

function woocommerce_ajax_add_to_cart_script() {
    // Only on single product pages
    if ( ! is_product() ) {
        return;
    }
    ?>
    <script type="text/javascript">
    jQuery(document).ready(function($) {
        // Handle AJAX add to cart on single product page
        $('form.cart').on('submit', function(e) {
            e.preventDefault();
            
            var $form = $(this);
            var $button = $form.find('.single_add_to_cart_button');
            var formData = new FormData($form[0]);
            
            // Add action for AJAX
            formData.append('add-to-cart', $form.find('[name=add-to-cart]').val());
            
            // Disable button and show loading
            $button.removeClass('added').addClass('loading');
            $button.prop('disabled', true);
            
            // Store original button text
            var originalText = $button.text();
            $button.text('Adding...');
            
            $.ajax({
                type: 'POST',
                url: wc_add_to_cart_params.wc_ajax_url.toString().replace('%%endpoint%%', 'add_to_cart'),
                data: formData,
                processData: false,
                contentType: false,
                success: function(response) {
                    if (response.error && response.product_url) {
                        window.location = response.product_url;
                        return;
                    }
                    
                    // Success
                    $button.removeClass('loading').addClass('added');
                    $button.text('Added to cart');
                    
                    // Update cart fragments
                    if (response.fragments) {
                        $.each(response.fragments, function(key, value) {
                            $(key).replaceWith(value);
                        });
                    }
                    
                    // Trigger added to cart event
                    $(document.body).trigger('added_to_cart', [response.fragments, response.cart_hash, $button]);
                    
                    // Show success message
                    if (response.notices) {
                        $('.woocommerce-notices-wrapper').html(response.notices);
                    }
                    
                    // Reset button after 2 seconds
                    setTimeout(function() {
                        $button.removeClass('added');
                        $button.text(originalText);
                        $button.prop('disabled', false);
                    }, 2000);
                },
                error: function() {
                    // Error handling
                    $button.removeClass('loading');
                    $button.text(originalText);
                    $button.prop('disabled', false);
                    
                    // Show error message
                    alert('Something went wrong. Please try again.');
                }
            });
        });
        
        // Handle quantity changes
        $('.quantity input[type=number]').on('change', function() {
            var $button = $('.single_add_to_cart_button');
            $button.removeClass('added');
        });
    });
    </script>
    <?php
}