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To start developing, please head over to our developer documentation.

Activate the Google Maps JavaScript API

To get you started we'll guide you through the Google Developers Console to do a few things first:

  1. Create or choose a project
  2. Activate the Google Maps JavaScript API and related services
  3. Create appropriate keys
Continue

POI Click Event

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 or view this example fullscreen.

function initMap() {
  var origin = {lat: -33.871, lng: 151.197};

  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 18,
    center: origin
  });
  var clickHandler = new ClickEventHandler(map, origin);
}

/**
 * @constructor
 */
var ClickEventHandler = function(map, origin) {
  this.origin = origin;
  this.map = map;
  this.directionsService = new google.maps.DirectionsService;
  this.directionsDisplay = new google.maps.DirectionsRenderer;
  this.directionsDisplay.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));
};

ClickEventHandler.prototype.handleClick = function(event) {
  console.log('You clicked on: ' + event.latLng);
  // If the event has a placeId, use it.
  if (event.placeId) {
    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();
    this.calculateAndDisplayRoute(event.placeId);
    this.getPlaceInformation(event.placeId);
  }
};

ClickEventHandler.prototype.calculateAndDisplayRoute = function(placeId) {
  var me = this;
  this.directionsService.route({
    origin: this.origin,
    destination: {placeId: placeId},
    travelMode: 'WALKING'
  }, function(response, status) {
    if (status === 'OK') {
      me.directionsDisplay.setDirections(response);
    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
};

ClickEventHandler.prototype.getPlaceInformation = function(placeId) {
  var me = this;
  this.placesService.getDetails({placeId: placeId}, function(place, status) {
    if (status === 'OK') {
      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);
    }
  });
};
<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>
/* 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;
}
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=places&callback=initMap">
</script>

Try it yourself

Hover at top right of the code block to copy the code or open it in JSFiddle.

<!DOCTYPE html>
<html>
  <head>
    <title>POI Click Event</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <style>
      /* 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>
  </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>
    <script>
      function initMap() {
        var origin = {lat: -33.871, lng: 151.197};

        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 18,
          center: origin
        });
        var clickHandler = new ClickEventHandler(map, origin);
      }

      /**
       * @constructor
       */
      var ClickEventHandler = function(map, origin) {
        this.origin = origin;
        this.map = map;
        this.directionsService = new google.maps.DirectionsService;
        this.directionsDisplay = new google.maps.DirectionsRenderer;
        this.directionsDisplay.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));
      };

      ClickEventHandler.prototype.handleClick = function(event) {
        console.log('You clicked on: ' + event.latLng);
        // If the event has a placeId, use it.
        if (event.placeId) {
          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();
          this.calculateAndDisplayRoute(event.placeId);
          this.getPlaceInformation(event.placeId);
        }
      };

      ClickEventHandler.prototype.calculateAndDisplayRoute = function(placeId) {
        var me = this;
        this.directionsService.route({
          origin: this.origin,
          destination: {placeId: placeId},
          travelMode: 'WALKING'
        }, function(response, status) {
          if (status === 'OK') {
            me.directionsDisplay.setDirections(response);
          } else {
            window.alert('Directions request failed due to ' + status);
          }
        });
      };

      ClickEventHandler.prototype.getPlaceInformation = function(placeId) {
        var me = this;
        this.placesService.getDetails({placeId: placeId}, function(place, status) {
          if (status === 'OK') {
            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);
          }
        });
      };
    </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places&callback=initMap"
        async defer></script>
  </body>
</html>

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