Summary
Throughout this final chapter, we have familiarized ourselves with the Shopify Ajax API and learned about different types of use cases. First, we learned how to upgrade the current purchase flow using the /cart/add.js endpoint, through which we can add any number of products, quantities, and line item customizations, whether they are public or private, directly to the current cart session.
By learning how to handle the /cart/change.js endpoint, we gained the necessary knowledge to create a feature that includes a specific product and quantity, such as an automatic gift or upsells feature. Using /cart/update.js in combination with the /cart.js endpoint, we learned how to update the cart's content dynamically and retrieve it. We can then use this to create a cart drawer feature.
Additionally, we learned how to use the /products/{product-handle}.js endpoint to retrieve an automatic list of recommended products and render their content into a section of our choice.
