geocoding-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>Geocoding Service</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="-34.397, 150.644" zoom="10" map-id="DEMO_MAP_ID">
      <div id="floating-panel" slot="control-block-start-inline-start">
        <input
          type="text"
          id="address"
          placeholder="Enter an address or click the map to reverse geocode." />
        <br />
        <input type="button" id="submit" value="Geocode" />
        <input type="button" id="clear" value="Clear Results" />
        <br />
      </div>
      <pre id="response-container" slot="control-block-start-inline-end">
                <code id="response"></code>
            </pre>
    </gmp-map>
  </body>
</html>

CSS

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

gmp-map {
  height: 100%;
  width: 100%;
}

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

#floating-panel {
  background-color: #fff;
  border-radius: 5px;
  box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
  margin: 10px;
  padding: 5px;
  font:
    400 18px Roboto,
    Arial,
    sans-serif;
  width: 350px;
  height: 100px;
}

#response-container {
  background-color: #fff;
  border: 0;
  border-radius: 5px;
  box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
  padding: 5px;
  margin: 10px;
  font-size: small;
  width: 400px;
  background-color: rgba(255, 255, 255, 0.95);
  max-height: 70vh;
  overflow-x: auto;
  display: none;
}

#address {
  width: 100%;
  padding: 10px;
  margin: 5px 0;
  box-sizing: border-box;
}

#submit,
#clear {
  background-color: #fff;
  border: 0;
  border-radius: 2px;
  box-shadow: 0 1px 4px -1px rgba(0, 0, 0, 0.3);
  height: 40px;
  cursor: pointer;
}

#clear:hover {
  background: rgb(235, 235, 235);
}

#submit {
  background-color: #1a73e8;
  color: white;
}

#submit:hover {
  background-color: #1765cc;
}

JavaScript

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

let geocoder;
let mapElement;
let innerMap;
let marker;
let responseDiv;
let responsePre;

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

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

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

  // Set map options.
  innerMap.setOptions({
    mapTypeControl: false,
    fullscreenControl: false,
    cameraControlOptions: {
      position: ControlPosition.INLINE_START_BLOCK_END,
    },
    draggableCursor: 'crosshair',
  });

  geocoder = new Geocoder();

  const inputText = document.getElementById('address');
  const submitButton = document.getElementById('submit');
  const clearButton = document.getElementById('clear');
  responseDiv = document.getElementById('response-container');
  responsePre = document.getElementById('response');

  marker = new AdvancedMarkerElement();

  innerMap.addListener('click', (e) => {
    void geocode({ location: e.latLng });
  });

  submitButton.addEventListener('click', () => {
    void geocode({ address: inputText.value });
  });

  clearButton.addEventListener('click', () => {
    clear();
  });

  clear();
}

function clear() {
  marker.map = null;
  responseDiv.style.display = 'none';
}

async function geocode(request) {
  clear();
  const { LatLng } = await google.maps.importLibrary('core');

  try {
    const response = await geocoder.geocode(request);
    const { results } = response;

    innerMap.setCenter(results[0].geometry.location);
    marker.position = new LatLng(results[0].geometry.location);
    mapElement.append(marker);
...