[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [ExternalTaggingService](./x-components.externaltaggingservice.md) > [trackAddToCart](./x-components.externaltaggingservice.trackaddtocart.md) ## ExternalTaggingService.trackAddToCart property Checks if the session storage contains a result information for a given id or the current url. If exists, it tracks the add to cart and saves the add to cart information into session storage. **Signature:** ```typescript trackAddToCart: (id?: string) => void; ```