event-simple

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>Simple 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="-25.363, 131.044" zoom="4" map-id="DEMO_MAP_ID"></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;
}

JavaScript

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

async function init() {
  // Request needed libraries.
  const [{ AdvancedMarkerElement }, { LatLng }] = await Promise.all([
    google.maps.importLibrary('marker'),
    google.maps.importLibrary('core'),
    google.maps.importLibrary('maps'),
  ]);

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

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

  const originalPosition = new LatLng(mapElement.center);

  const marker = new AdvancedMarkerElement({
    position: originalPosition,
    map: innerMap,
    title: 'Click to zoom',
    gmpClickable: true,
  });

  innerMap.addListener('center_changed', () => {
    // 3 seconds after the center of the map has changed,
    // pan back to the marker.
    window.setTimeout(() => {
      innerMap.panTo(originalPosition);
    }, 3000);
  });

  // Zoom in when the marker is clicked.
  marker.addEventListener('gmp-click', () => {
    innerMap.setZoom(8);
    innerMap.setCenter(originalPosition);
  });
}

void init();