Project: /docs/reference/js/_project.yaml Book: /docs/reference/_book.yaml page_type: reference {% comment %} DO NOT EDIT THIS FILE! This is generated by the JS SDK team, and any local changes will be overwritten. Changes should be made in the source code at https://github.com/firebase/firebase-js-sdk {% endcomment %} # ControlParams interface Standard `gtag.js` control parameters. For more information, see [the GA4 reference documentation](https://developers.google.com/gtagjs/reference/ga4-events). Signature: ```typescript export interface ControlParams ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [event\_callback](./analytics.controlparams.md#controlparamsevent_callback) | () => void | | | [event\_timeout](./analytics.controlparams.md#controlparamsevent_timeout) | number | | | [groups](./analytics.controlparams.md#controlparamsgroups) | string \| string\[\] | | | [send\_to](./analytics.controlparams.md#controlparamssend_to) | string \| string\[\] | | ## ControlParams.event\_callback Signature: ```typescript event_callback?: () => void; ``` ## ControlParams.event\_timeout Signature: ```typescript event_timeout?: number; ``` ## ControlParams.groups Signature: ```typescript groups?: string | string[]; ``` ## ControlParams.send\_to Signature: ```typescript send_to?: string | string[]; ```