POI Click Events

This example demonstrates the use of click event listeners on POIs (points of interest). It listens for the click event on the basemap, and shows an info window if a place ID is present in the event. The click event listener uses event.stop() to prevent the default POI info window from showing.

Read the documentation.

TypeScript

let innerMap: google.maps.Map;

async function init() {
    //  Request the needed libraries.
    void google.maps.importLibrary('core'); // preload
    const { InfoWindow } = await google.maps.importLibrary('maps');

    // Retrieve the map element.
    const mapElement = document.querySelector('gmp-map')!;

    // Get the inner map from the map element.
    innerMap = mapElement.innerMap;

    // Create the initial info window.
    const infoWindow = new InfoWindow();

    // Add a listener for click events on the map.
    innerMap.addListener(
        'click',
        (event: google.maps.MapMouseEvent | google.maps.IconMouseEvent) => {
            // Prevent the default POI info window from showing.
            event.stop();

            // If the event has a placeId, show the info window.
            if (isIconMouseEvent(event) && event.placeId) {
                void showInfoWindow(event, infoWindow);
            } else {
                // Close the info window if there is no placeId.
                infoWindow.close();
            }
        }
    );
}

// Helper function to show the info window.
async function showInfoWindow(
    event: google.maps.IconMouseEvent,
    infoWindow: google.maps.InfoWindow
) {
    if (!event.placeId) return;

    const { Size } = await google.maps.importLibrary('core');

    // Retrieve the place details for the selected POI.
    const place = await getPlaceDetails(event.placeId);

    // Assemble the info window content.
    const content = document.createElement('div');
    const address = document.createElement('div');
    const placeId = document.createElement('div');
    address.textContent = place.formattedAddress || '';
    placeId.textContent = place.id || '';
    content.append(address, placeId);

    // Create an element to use the place name as header content.
    const name = document.createElement('div');
    name.style.fontWeight = 'bold';
    name.style.fontSize = 'medium';
    name.textContent = place.displayName || '';

    // Update info window options.
    infoWindow.setOptions({
        position: event.latLng,
        pixelOffset: new Size(0, -30),
        headerContent: name,
        content,
    });

    innerMap.panTo(event.latLng!);
    infoWindow.open(innerMap);
}

// Helper function to get place details.
async function getPlaceDetails(placeId: string) {
    // Import the Places library.
    const { Place } = await google.maps.importLibrary('places');

    // Create a Place instance with the place id and fetch the details.
    const place = new Place({ id: placeId });
    await place.fetchFields({
        fields: ['displayName', 'formattedAddress'],
    });

    // Return the place details.
    return place;
}

// Helper type guard to determine if the event is an IconMouseEvent.
function isIconMouseEvent(
    e: google.maps.MapMouseEvent | google.maps.IconMouseEvent
): e is google.maps.IconMouseEvent {
    return 'placeId' in e;
}

void init();

JavaScript

let innerMap;

async function init() {
    //  Request the needed libraries.
    void google.maps.importLibrary('core'); // preload
    const { InfoWindow } = await google.maps.importLibrary('maps');

    // Retrieve the map element.
    const mapElement = document.querySelector('gmp-map');

    // Get the inner map from the map element.
    innerMap = mapElement.innerMap;

    // Create the initial info window.
    const infoWindow = new InfoWindow();

    // Add a listener for click events on the map.
    innerMap.addListener('click', (event) => {
        // Prevent the default POI info window from showing.
        event.stop();

        // If the event has a placeId, show the info window.
        if (isIconMouseEvent(event) && event.placeId) {
            void showInfoWindow(event, infoWindow);
        } else {
            // Close the info window if there is no placeId.
            infoWindow.close();
        }
    });
}

// Helper function to show the info window.
async function showInfoWindow(event, infoWindow) {
    if (!event.placeId) return;

    const { Size } = await google.maps.importLibrary('core');

    // Retrieve the place details for the selected POI.
    const place = await getPlaceDetails(event.placeId);

    // Assemble the info window content.
    const content = document.createElement('div');
    const address = document.createElement('div');
    const placeId = document.createElement('div');
    address.textContent = place.formattedAddress || '';
    placeId.textContent = place.id || '';
    content.append(address, placeId);

    // Create an element to use the place name as header content.
    const name = document.createElement('div');
    name.style.fontWeight = 'bold';
    name.style.fontSize = 'medium';
    name.textContent = place.displayName || '';

    // Update info window options.
    infoWindow.setOptions({
        position: event.latLng,
        pixelOffset: new Size(0, -30),
        headerContent: name,
        content,
    });

    innerMap.panTo(event.latLng);
    infoWindow.open(innerMap);
}

// Helper function to get place details.
async function getPlaceDetails(placeId) {
    // Import the Places library.
    const { Place } = await google.maps.importLibrary('places');

    // Create a Place instance with the place id and fetch the details.
    const place = new Place({ id: placeId });
    await place.fetchFields({
        fields: ['displayName', 'formattedAddress'],
    });

    // Return the place details.
    return place;
}

// Helper type guard to determine if the event is an IconMouseEvent.
function isIconMouseEvent(e) {
    return 'placeId' in e;
}

void init();

CSS

/* Optional: Makes the sample page fill the window. */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

.title {
    font-weight: bold;
}

HTML

<html>
    <head>
        <title>POI Click Events</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <script>
            // prettier-ignore
            (g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})({
                key: "GOOGLE_MAPS_API_KEY"
            });
        </script>
    </head>
    <body>
        <gmp-map center="-33.871, 151.197" zoom="18"> </gmp-map>
    </body>
</html>

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. You will also need a Google Maps API key.

The following commands clone the repository, install dependencies, and copy the environment file. 

  git clone https://github.com/googlemaps-samples/js-api-samples.git
  cd js-api-samples
  npm i
  cp .env.template .env

Once you copy the environment file, make sure to open the .env file and replace <Insert your own development API key here> with your actual API key before starting the sample. 

  cd samples/event-poi
  npm start