Optimizing Cart Management in Sylius 1.10: Handling Multiple Forms and Ensuring Secure AJAX Item Deletion

Managing cart interactions effectively is vital for a smooth e-commerce experience. When working with Sylius 1.10.14 on Symfony 5.4, developers often face challenges integrating multiple forms—such as quantity updates, promotional codes, and item deletions—especially when leveraging AJAX for seamless user interactions. This article explores common issues and actionable strategies to implement multiple independent forms securely and efficiently within your Sylius storefront.

Understanding the Challenges

In a typical Sylius cart setup, the main form handles operations like updating item quantities and applying promo codes. However, adding AJAX-based removal buttons for individual items introduces complexity, primarily around CSRF protection and event handling. Developers frequently observe silent failures or CSRF errors during asynchronous deletions, leading to a poor user experience.

Case Study Overview

Consider a custom cart page with the following structure:

• Main form: Manages quantity adjustments and promo code submissions (functional)
• Per-item remove buttons: Implemented with AJAX outside the main form, each containing a CSRF token

Sample Twig template snippet for item removal button:

twig
<button type="button"
class="sylius-cart-remove-button"
data-action="delete"
data-url="{{ path('sylius_shop_cart_item_remove', {'id': item.id}) }}"
data-token="{{ csrf_token('sylius_shop_cart_item_remove' ~ item.id) }}">
<i class="remove icon"></i>
</button>

JavaScript handling AJAX deletion:

“`js
document.addEventListener(‘DOMContentLoaded’, () => {
document.querySelectorAll(‘.sylius-cart-remove-button’).forEach(button => {
button.addEventListener(‘click’, () => {
const url = button.dataset.url;
const csrfToken = button.dataset.token;
const row = button.closest(‘tr’);

        fetch(url, {
            method: 'POST',
            headers: {
                'X-Requested-With': 'XMLHttpRequest',
                'Content-Type': 'application/x-www-form-urlencoded'
            },
            body: '_csrf_token=' + encodeURIComponent(csrfToken)
        }).then(response => {
            if (response.ok) {
                row.remove();
                // update cart summary
            } else {
                alert('An error occurred during deletion. Please try again.');
            }
        });
    });
});

});
“`

The Core Issue