Shopify has expanded the Cart AJAX API's `/cart/update.js` endpoint to include native support for discount codes. Developers can now add or remove discounts directly through the discount parameter without building custom workarounds. This streamlines cart management and enables more flexible discount handling in custom storefronts and headless implementations.
Previously, applying discounts programmatically required additional API calls or custom solutions, adding complexity to cart workflows. With this update, developers can now manage discounts as part of standard cart operations, reducing code overhead and improving the customer experience. This is particularly valuable for custom checkout flows, cart recovery tools, and dynamic promotional experiences that need real-time discount application.
If you're building custom applications that interact with Shopify's Cart AJAX API, GetShopifyToken can help you manage secure API authentication and token handling. This ensures your discount implementations work reliably within a properly authenticated environment.