control-replacement

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>Replacing Default Controls</title>

    <link
      href="https://fonts.googleapis.com/icon?family=Material+Icons"
      rel="stylesheet" />
    <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="8">
      <div class="controls zoom-control" slot="control-inline-end-block-end">
        <button class="zoom-control-in" title="Zoom In">+</button>
        <button class="zoom-control-out" title="Zoom Out">-</button>
      </div>
      <div
        class="controls maptype-control maptype-control-is-map"
        slot="control-block-start-inline-start">
        <button class="maptype-control-map" title="Show road map">Map</button>
        <button
          class="maptype-control-satellite"
          title="Show satellite imagery">
          Satellite
        </button>
      </div>
      <div
        class="controls fullscreen-control"
        slot="control-block-start-inline-end">
        <button id="fullscreen-button" title="Toggle Fullscreen">
          <span class="material-icons">fullscreen</span>
        </button>
      </div>
    </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;
}

.controls {
  margin: 10px;
  background-color: white;
  box-shadow: rgba(0, 0, 0, 0.3) 0px 1px 4px -1px;
  box-sizing: border-box;
  border-radius: 2px;
  display: flex;
  user-select: none;
  background-clip: padding-box;
  overflow: hidden; /* Keeps button backgrounds inside the rounded corners */
}

.controls button {
  border: 0;
  background-color: white;
  color: rgba(0, 0, 0, 0.6);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color 0.2s ease;
}

.controls button:hover {
  color: rgba(0, 0, 0, 0.9);
}

.controls.zoom-control {
  flex-direction: column;
  width: 40px;
}

.controls.zoom-control button {
  height: 40px;
  width: 40px;
  font-size: 24px;
}

.controls.maptype-control {
  flex-direction: row;
  height: 40px;
}

.controls.maptype-control button {
  padding: 0 12px;
  font-size: 14px;
  font-family: Roboto, Arial, sans-serif;
  text-transform: uppercase;
  height: 100%;
}

.controls.maptype-control.maptype-control-is-map .maptype-control-map {
  font-weight: 700;
}

.controls.maptype-control.maptype-control-is-satellite
  .maptype-control-satellite {
  font-weight: 700;
}

.controls.fullscreen-control {
  width: 40px;
  height: 40px;
}

.controls.fullscreen-control button {
  background: none;
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.controls.fullscreen-control {
  width: 40px;
  height: 40px;
}

#fullscreen-button .material-icons {
  font-size: 28px;
}

JavaScript

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

const mapElement = document.querySelector('gmp-map');
let innerMap;

async function init() {
  // Load the needed libraries.
  await google.maps.importLibrary('maps');

  innerMap = mapElement.innerMap;

  // Disable the default controls.
  innerMap.setOptions({
    disableDefaultUI: true,
  });

  initZoomControl(innerMap);
  initMapTypeControl(innerMap);
  initFullscreenControl();
}

function initZoomControl(map) {
  const zoomInButton = document.querySelector('.zoom-control-in');
  const zoomOutButton = document.querySelector('.zoom-control-out');

  zoomInButton.addEventListener('click', () => {
    map.setZoom((map.getZoom() || 0) + 1);
  });

  zoomOutButton.addEventListener('click', () => {
    map.setZoom((map.getZoom() || 0) - 1);
  });
}

function initMapTypeControl(map) {
  const mapTypeControlDiv = document.querySelector('.maptype-control');
  const btnMap = document.querySelector('.maptype-control-map');
  const btnSatellite = document.querySelector('.maptype-control-satellite');

  btnMap.addEventListener('click', () => {
    mapTypeControlDiv.classList.add('maptype-control-is-map');
    mapTypeControlDiv.classList.remove('maptype-control-is-satellite');
    map.setMapTypeId('roadmap');
  });

  btnSatellite.addEventListener('click', () => {
    mapTypeControlDiv.classList.add('maptype-control-is-satellite');
    mapTypeControlDiv.classList.remove('maptype-control-is-map');
    map.setMapTypeId('hybrid');
  });
}

function initFullscreenControl() {
  // Get the UI elements for the fullscreen control.
  const btnFullscreen = document.querySelector('#fullscreen-button');

  btnFullscreen.addEventListener('click', () => {
    toggleFullScreen(mapElement);
  });
}

function toggleFullScreen(element) {
  const fullScreenIcon = document.querySelector(
    '#fullscreen-button .material-icons'
  );

  try {
    if...