Cacher is the code snippet organizer for pro developers

<?php
/**
 * MT - TEC PRO - Modify Map View's Tooltips Data
 * 
 * from https://gist.github.com/cliffordp/0a7381fb1dfadd8e68644ce40ba9cc50
 * as-is screenshot: https://cl.ly/2h3E3k1r3R1r
 * 
 * Would need to add custom JavaScript, possibly via tribe_ev.map_add_marker() and others from /wp-content/plugins/events-calendar-pro/src/resources/js/tribe-events-ajax-maps.js in order to ADD additional lines of output instead of just MODIFYING one of the existing lines.
 *
 * for https://theeventscalendar.com/support/forums/topic/map-view-tooltip-customization/
 *
 * @param array $response
 * 
 * @return array
 */
function cliff_tec_pro_map_marker_info( $response ) {
	if ( ! is_array( $response ) || 'map' !== $response['view'] ) {
		return $response;
	}

	foreach ( $response['markers'] as $key => $value ) {
		$response['markers'][ $key ]['address'] .= ' -- My Custom Text Here.';
	}

	return $response;
}

add_filter( 'tribe_events_ajax_response', 'cliff_tec_pro_map_marker_info' );