This example demonstrates the use of click event listeners on POIs (points of
interest). It listens for the click event on a POI icon and then
uses the placeId from the event data with a
directionsService.route request to calculate and display a route to
the clicked place. It also uses the placeId to get more details of
the place.
Read the documentation.
TypeScript
function initMap(): void {
const origin = { lat: -33.871, lng: 151.197 };
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 18,
center: origin,
}
);
new ClickEventHandler(map, origin);
}
function isIconMouseEvent(
e: google.maps.MapMouseEvent | google.maps.IconMouseEvent
): e is google.maps.IconMouseEvent {
return "placeId" in e;
}
class ClickEventHandler {
origin: google.maps.LatLngLiteral;
map: google.maps.Map;
directionsService: google.maps.DirectionsService;
directionsRenderer: google.maps.DirectionsRenderer;
placesService: google.maps.places.PlacesService;
infowindow: google.maps.InfoWindow;
infowindowContent: HTMLElement;
constructor(map: google.maps.Map, origin: google.maps.LatLngLiteral) {
this.origin = origin;
this.map = map;
this.directionsService = new google.maps.DirectionsService();
this.directionsRenderer = new google.maps.DirectionsRenderer();
this.directionsRenderer.setMap(map);
this.placesService = new google.maps.places.PlacesService(map);
this.infowindow = new google.maps.InfoWindow();
this.infowindowContent = document.getElementById(
"infowindow-content"
) as HTMLElement;
this.infowindow.setContent(this.infowindowContent);
// Listen for clicks on the map.
this.map.addListener("click", this.handleClick.bind(this));
}
handleClick(event: google.maps.MapMouseEvent | google.maps.IconMouseEvent) {
console.log("You clicked on: " + event.latLng);
// If the event has a placeId, use it.
if (isIconMouseEvent(event)) {
console.log("You clicked on place:" + event.placeId);
// Calling e.stop() on the event prevents the default info window from
// showing.
// If you call stop here when there is no placeId you will prevent some
// other map click event handlers from receiving the event.
event.stop();
if (event.placeId) {
this.calculateAndDisplayRoute(event.placeId);
this.getPlaceInformation(event.placeId);
}
}
}
calculateAndDisplayRoute(placeId: string) {
const me = this;
this.directionsService
.route({
origin: this.origin,
destination: { placeId: placeId },
travelMode: google.maps.TravelMode.WALKING,
})
.then((response) => {
me.directionsRenderer.setDirections(response);
})
.catch((e) => window.alert("Directions request failed due to " + status));
}
getPlaceInformation(placeId: string) {
const me = this;
this.placesService.getDetails(
{ placeId: placeId },
(
place: google.maps.places.PlaceResult | null,
status: google.maps.places.PlacesServiceStatus
) => {
if (
status === "OK" &&
place &&
place.geometry &&
place.geometry.location
) {
me.infowindow.close();
me.infowindow.setPosition(place.geometry.location);
(
me.infowindowContent.children["place-icon"] as HTMLImageElement
).src = place.icon as string;
(
me.infowindowContent.children["place-name"] as HTMLElement
).textContent = place.name!;
(
me.infowindowContent.children["place-id"] as HTMLElement
).textContent = place.place_id as string;
(
me.infowindowContent.children["place-address"] as HTMLElement
).textContent = place.formatted_address as string;
me.infowindow.open(me.map);
}
}
);
}
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
JavaScript
function initMap() {
const origin = { lat: -33.871, lng: 151.197 };
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 18,
center: origin,
});
new ClickEventHandler(map, origin);
}
function isIconMouseEvent(e) {
return "placeId" in e;
}
class ClickEventHandler {
origin;
map;
directionsService;
directionsRenderer;
placesService;
infowindow;
infowindowContent;
constructor(map, origin) {
this.origin = origin;
this.map = map;
this.directionsService = new google.maps.DirectionsService();
this.directionsRenderer = new google.maps.DirectionsRenderer();
this.directionsRenderer.setMap(map);
this.placesService = new google.maps.places.PlacesService(map);
this.infowindow = new google.maps.InfoWindow();
this.infowindowContent = document.getElementById("infowindow-content");
this.infowindow.setContent(this.infowindowContent);
// Listen for clicks on the map.
this.map.addListener("click", this.handleClick.bind(this));
}
handleClick(event) {
console.log("You clicked on: " + event.latLng);
// If the event has a placeId, use it.
if (isIconMouseEvent(event)) {
console.log("You clicked on place:" + event.placeId);
// Calling e.stop() on the event prevents the default info window from
// showing.
// If you call stop here when there is no placeId you will prevent some
// other map click event handlers from receiving the event.
event.stop();
if (event.placeId) {
this.calculateAndDisplayRoute(event.placeId);
this.getPlaceInformation(event.placeId);
}
}
}
calculateAndDisplayRoute(placeId) {
const me = this;
this.directionsService
.route({
origin: this.origin,
destination: { placeId: placeId },
travelMode: google.maps.TravelMode.WALKING,
})
.then((response) => {
me.directionsRenderer.setDirections(response);
})
.catch((e) => window.alert("Directions request failed due to " + status));
}
getPlaceInformation(placeId) {
const me = this;
this.placesService.getDetails({ placeId: placeId }, (place, status) => {
if (
status === "OK" &&
place &&
place.geometry &&
place.geometry.location
) {
me.infowindow.close();
me.infowindow.setPosition(place.geometry.location);
me.infowindowContent.children["place-icon"].src = place.icon;
me.infowindowContent.children["place-name"].textContent = place.name;
me.infowindowContent.children["place-id"].textContent = place.place_id;
me.infowindowContent.children["place-address"].textContent =
place.formatted_address;
me.infowindow.open(me.map);
}
});
}
}
window.initMap = initMap;
CSS
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
.title {
font-weight: bold;
}
#infowindow-content {
display: none;
}
#map #infowindow-content {
display: inline;
}
HTML
<html>
<head>
<title>POI Click Events</title>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<div id="infowindow-content">
<img id="place-icon" src="" height="16" width="16" />
<span id="place-name" class="title"></span><br />
Place ID <span id="place-id"></span><br />
<span id="place-address"></span>
</div>
<!--
The `defer` attribute causes the script to execute after the full HTML
document has been parsed. For non-blocking uses, avoiding race conditions,
and consistent behavior across browsers, consider loading using Promises. See
https://developers.google.com/maps/documentation/javascript/load-maps-js-api
for more information.
-->
<script
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&libraries=places&v=weekly"
defer
></script>
</body>
</html>
Try Sample
Clone Sample
Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
git clone -b sample-event-poi https://github.com/googlemaps/js-samples.gitcd js-samplesnpm inpm start
Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.
git checkout sample-SAMPLE_NAMEnpm inpm start