An event that triggers when a checkout is completed. This happens either when an order is created from a checkout, or after using markCheckoutAsCompleted().
The onCheckoutCompleted() event handler runs when a checkout is completed. The received CheckoutCompleted object contains information about the checkout that was completed and event metadata.
Note: Backend events don't work when previewing your site.
Information about the checkout that was completed and event metadata.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.