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Last updated 2022-07-27 UTC.
[null,null,["Last updated 2022-07-27 UTC."],[],[],null,["# ControlParams | JavaScript SDK\n\n- [firebase](/docs/reference/js/v8/firebase).\n- [analytics](/docs/reference/js/v8/firebase.analytics).\n- ControlParams\n======================================================================================================================\n\nStandard gtag.js control parameters.\nFor more information, see\n[the gtag.js documentation on parameters](https://developers.google.com/gtagjs/reference/parameter).\n\nIndex\n-----\n\n### Properties\n\n- [event_callback](/docs/reference/js/v8/firebase.analytics.ControlParams#event_callback)\n- [event_timeout](/docs/reference/js/v8/firebase.analytics.ControlParams#event_timeout)\n- [groups](/docs/reference/js/v8/firebase.analytics.ControlParams#groups)\n- [send_to](/docs/reference/js/v8/firebase.analytics.ControlParams#send_to)\n\nProperties\n----------\n\n### Optional event_callback\n\nevent_callback: () =\\\u003e void \n\n#### Type declaration\n\n-\n - (): void\n\n \u003c!-- --\u003e\n\n -\n\n #### Returns void\n\n### Optional event_timeout\n\nevent_timeout: number\n\n### Optional groups\n\ngroups: string \\| string\\[\\]\n\n### Optional send_to\n\nsend_to: string \\| string\\[\\]"]]
Standard gtag.js control parameters. For more information, see the gtag.js documentation on parameters.