Как найти ближайшую метку и рассчитать расстояние до нее с помощью Google Maps API?

var coord = [
    {"id": 1, "coordlat": 47.2200, "coordlng": 39.6170},
    {"id": 2, "coordlat": 47.2882, "coordlng": 39.6643},
    {"id": 3, "coordlat": 47.2190, "coordlng": 39.7162},
    {"id": 4, "coordlat": 47.2502, "coordlng": 39.7930},
    {"id": 5, "coordlat": 47.2503, "coordlng": 39.5639},
    {"id": 6, "coordlat": 47.2612, "coordlng": 39.6854},
    {"id": 7, "coordlat": 47.2830, "coordlng": 39.6253},
    {"id": 8, "coordlat": 47.2799, "coordlng": 39.7486},
    {"id": 9, "coordlat": 47.1972, "coordlng": 39.6569},
];

var delAdress = $('input"]');
var markers = [];
var coords = [];
var map;

function initMap() {
    map = new google.maps.Map(document.getElementById('map'), {
        zoom: 11,
        center: {lat: 47.2381, lng: 39.7002}
    });
    var geocoder = new google.maps.Geocoder();
    for( i = 0; i < coord.length; i++ ) {
        var position = new google.maps.LatLng(coord[i].coordlat, coord[i].coordlng);
        marker = new google.maps.Marker({
            position: position,
            map: map,
        });
        coords.push(marker);
    };
    document.getElementById('btn').addEventListener('click', function() {
        if(delAdress.val()==''){
            return false;
        } else{
            geocodeAddress(geocoder, map);
        }
    });
    map.addListener('click', function(event) {
          addMarker(event.latLng);
    });
};

function addMarker(location){
    setMapOnAll(null);
    markers = [];
    var marker = new google.maps.Marker({
        position: location,
        map: map,
    });
    markers.push(marker);
};

function geocodeAddress(geocoder, resultsMap) {
    
    var address = document.getElementById('suggestions').value;
    
    geocoder.geocode({'address': address}, function(results, status) {
        if (status === 'OK') {
            setMapOnAll(null);
            markers = [];
            resultsMap.setCenter(results[0].geometry.location);
            var marker = new google.maps.Marker({
                map: map,
                position: results[0].geometry.location,
            });
            markers.push(marker);
        } else {
            console.log('Geocode was not successful for the following reason: ' + status);
        }
    });
};

function setMapOnAll(map) {
    for (var i = 0; i < markers.length; i++) {
        markers[i].setMap(map);
    }
}