om-js-events-ga-impression.js

// OptinMonster Javascript Event for Google Analytics Impression Event

document.addEventListener( 'om.GoogleAnalytics.preImpressionEvent', function( event ) {

	var ga = event.detail.GoogleAnalytics;

	var campaign = event.detail.Campaign;

	var gaEvent = event.detail.gaEvent;

	if ( 'YOUR_CAMPAIGN_ID' !== campaign.id ) {

		return;

	}

	// custom code goes here

	gaEvent.name = 'my_custom_impression_event_name';

	gaEvent.params.my_custom_param = 'my_custom_value';

} );