POI Click Events

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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;
index.ts

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;
index.js

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;
}

style.css

HTML

<html>
  <head>
    <title>POI Click Events</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>

    <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 callback 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
      with https://www.npmjs.com/package/@googlemaps/js-api-loader.
      -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&libraries=places&v=weekly"
      defer
    ></script>
  </body>
</html>
index.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.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME. 

  git checkout sample-SAMPLE_NAME
  npm i
  npm start