event-poi

Sample code supporting Google Maps Platform JavaScript API documentation. author(s): Geo Developer IX Documentation Team

HTML

<!doctype html>
<!--
 @license
 Copyright 2026 Google LLC. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0
-->

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

    <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))})({
            });
    </script>
  </head>
  <body>
    <gmp-map center="-33.871, 151.197" zoom="18"> </gmp-map>
  </body>
</html>

CSS

/**
 * @license
 * Copyright 2026 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

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

.title {
  font-weight: bold;
}

JavaScript

'use strict';
/**
 * @license
 * Copyright 2026 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

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,
...