> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt # Method name: onCheckoutTemplateUsed(event: CheckoutTemplateUsedEvent) # Method package: wixEcomBackend # Method menu location: wixEcomBackend --> onCheckoutTemplateUsed # Method Link: https://dev.wix.com/docs/velo/events-service-plugins/e-commerce/events/on-checkout-template-used.md # Method Description: Triggered when a checkout template is used to create a checkout. The `onCheckoutTemplateUsed()` event handler runs when a checkout template is created. The received `CheckoutTemplateUsedEvent` object contains information about the checkout template that was used, the checkout that was created, and event metadata. >**Note:** Backend events don't work when previewing your site. # Method Code Examples: *** Note: do not assume any prop names or enum values other than the ones in the example. ## onCheckoutTemplateUsed example ```javascript export function wixEcom_onCheckoutTemplateUsed(event) { const eventId = event.metadata.id const entityId = event.data.checkoutTemplate._id; } ``` ---