Change the zoom if a particular marker is present

ts_maps_zoom_marker.js

/*
* This snippet will change the map zoom if a particular marker is present.
* Used here: https://wp-types.com/forums/topic/change-what-a-map-shows-when-there-are-no-search-results/#post-374619
*/

jQuery( document ).on( 'js_event_wpv_addon_maps_init_map_started', function( event, data ) {
    if (WPViews.view_addon_maps.maps_data[0].markers[0].marker == 'marker-123'){
        data.map_options.single_zoom = 1;
    }  
});