Google map with custom style

google-map.config.html

<script src="https://maps.googleapis.com/maps/api/js?key=API_KEY_HERE&libraries=places&callback=initMap" async defer></script>
<script type="text/javascript">
		// grey style
		var styles = [{"featureType":"all","elementType":"all","stylers":[{"saturation":-100},{"gamma":0.5}]},{"featureType":"administrative.locality","elementType":"geometry","stylers":[{"visibility":"off"}]},{"featureType":"administrative.locality","elementType":"labels.text","stylers":[{"visibility":"on"}]},{"featureType":"administrative.locality","elementType":"labels.text.fill","stylers":[{"visibility":"on"}]},{"featureType":"administrative.locality","elementType":"labels.text.stroke","stylers":[{"visibility":"on"}]},{"featureType":"administrative.locality","elementType":"labels.icon","stylers":[{"visibility":"on"}]},{"featureType":"administrative.neighborhood","elementType":"geometry.fill","stylers":[{"visibility":"on"}]},{"featureType":"landscape.man_made","elementType":"geometry","stylers":[{"visibility":"on"}]},{"featureType":"landscape.natural","elementType":"geometry","stylers":[{"visibility":"on"}]},{"featureType":"landscape.natural.landcover","elementType":"geometry","stylers":[{"visibility":"on"}]},{"featureType":"landscape.natural.terrain","elementType":"geometry","stylers":[{"visibility":"on"}]},{"featureType":"poi.attraction","elementType":"geometry","stylers":[{"visibility":"on"}]},{"featureType":"transit.station.rail","elementType":"geometry","stylers":[{"visibility":"on"},{"hue":"#ff3900"},{"saturation":"0"}]},{"featureType":"transit.station.rail","elementType":"geometry.fill","stylers":[{"visibility":"on"}]},{"featureType":"transit.station.rail","elementType":"geometry.stroke","stylers":[{"visibility":"off"}]}];

		var map;
		function initMap() {
			map = new google.maps.Map(document.getElementById('company-address-map'), {
				center: {lat: 1.333644, lng: 103.838822},
				zoom: 16,
				streetViewControl: false,
				mapTypeControlOptions: {
					mapTypeIds: [google.maps.MapTypeId.ROADMAP, google.maps.MapTypeId.HYBRID]
				},
			});

			map.setOptions({styles: styles});

			var infowindow = new google.maps.InfoWindow();
			var service = new google.maps.places.PlacesService(map);

			service.getDetails({
				placeId: 'ChIJheH9f20Z2jER1GssO_cvbDA'
			}, function(place, status) {
				if (status === google.maps.places.PlacesServiceStatus.OK) {
					var marker = new google.maps.Marker({
						map: map,
						position: place.geometry.location,
					});
					google.maps.event.addListener(marker, 'click', function() {
						infowindow.setContent('<div class="poi-info-window gm-style map-marker-address"><span class="title">' + place.name + '</span>' +
							place.formatted_address + '<br> <a class="directions" href="https://www.google.com/maps/dir//510+11-00+SLF+Building+Singapore,+Thomson+Rd,+Immortal+The+Design+Station+Pte+Ltd,+Singapore+298135/@1.3332919,103.8370268,17z/" target="_blank">Get directions here</a>' + '</div>');
						infowindow.open(map, this);
					});
				}
			});

		}
</script>