What is the method to enable the Shopify Ajax API for theme interactions?

The method to enable the Shopify Ajax API for theme interactions is through AJAX requests in JavaScript. This approach is integral to working with the Shopify platform because it allows developers to make asynchronous HTTP requests from the JavaScript running on the client side of the theme.

Using AJAX requests, developers can interact with various store features without needing to refresh the entire page. This means you can update product information, modify the cart, and manage customer data dynamically, enhancing the user experience by making it more seamless and interactive.

The other options do not directly pertain to enabling the Ajax API for theme interactions. While Shopify Scripts are useful for backend customizations, they do not interact with the Ajax API in the same capacity that AJAX requests do. Configuring settings in the Shopify Admin typically pertains to store management rather than interacting with the Ajax API. Linking to external JS libraries can be beneficial for added functionality, but it is not a method for enabling the Ajax API itself. Therefore, utilizing AJAX requests in JavaScript is clearly the correct approach for implementing dynamic interactions within a Shopify theme.