[Home](./index.md) > [@firebase/analytics](./analytics.md) > [EventParams](./analytics.eventparams.md) ## EventParams interface Standard gtag.js event parameters. For more information, see [the gtag.js documentation on parameters](https://developers.google.com/gtagjs/reference/parameter). Signature: ```typescript export interface EventParams ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [affiliation](./analytics.eventparams.affiliation.md) | string | | | [checkout\_option](./analytics.eventparams.checkout_option.md) | string | | | [checkout\_step](./analytics.eventparams.checkout_step.md) | number | | | [content\_id](./analytics.eventparams.content_id.md) | string | | | [content\_type](./analytics.eventparams.content_type.md) | string | | | [coupon](./analytics.eventparams.coupon.md) | string | | | [currency](./analytics.eventparams.currency.md) | string | | | [description](./analytics.eventparams.description.md) | string | | | [event\_category](./analytics.eventparams.event_category.md) | string | | | [event\_label](./analytics.eventparams.event_label.md) | string | | | [fatal](./analytics.eventparams.fatal.md) | boolean | | | [item\_list\_id](./analytics.eventparams.item_list_id.md) | string | | | [item\_list\_name](./analytics.eventparams.item_list_name.md) | string | | | [items](./analytics.eventparams.items.md) | [Item](./analytics.item.md)\[\] | | | [method](./analytics.eventparams.method.md) | string | | | [number](./analytics.eventparams.number.md) | string | | | [page\_location](./analytics.eventparams.page_location.md) | string | | | [page\_path](./analytics.eventparams.page_path.md) | string | | | [page\_title](./analytics.eventparams.page_title.md) | string | | | [payment\_type](./analytics.eventparams.payment_type.md) | string | | | [promotion\_id](./analytics.eventparams.promotion_id.md) | string | | | [promotion\_name](./analytics.eventparams.promotion_name.md) | string | | | [promotions](./analytics.eventparams.promotions.md) | [Promotion](./analytics.promotion.md)\[\] | | | [screen\_name](./analytics.eventparams.screen_name.md) | string | | | [search\_term](./analytics.eventparams.search_term.md) | string | | | [shipping\_tier](./analytics.eventparams.shipping_tier.md) | string | | | [shipping](./analytics.eventparams.shipping.md) | [Currency](./analytics.currency.md) | | | [tax](./analytics.eventparams.tax.md) | [Currency](./analytics.currency.md) | | | [transaction\_id](./analytics.eventparams.transaction_id.md) | string | | | [value](./analytics.eventparams.value.md) | number | |