Replace Default Controls

Read the documentation.

TypeScript

const mapElement = document.querySelector('gmp-map')!;
let innerMap: google.maps.Map;

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: google.maps.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: google.maps.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: google.maps.MapElement) {
    const fullScreenIcon = document.querySelector<HTMLElement>(
        '#fullscreen-button .material-icons'
    )!;

    try {
        if (!document.fullscreenElement) {
            void element.requestFullscreen();
            fullScreenIcon.innerText = 'fullscreen_exit';
        } else {
            void document.exitFullscreen();
            fullScreenIcon.innerText = 'fullscreen';
        }
    } catch (error) {
        console.error('Error toggling fullscreen:', error);
    }
}

void init();

JavaScript

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 (!document.fullscreenElement) {
            void element.requestFullscreen();
            fullScreenIcon.innerText = 'fullscreen_exit';
        } else {
            void document.exitFullscreen();
            fullScreenIcon.innerText = 'fullscreen';
        }
    } catch (error) {
        console.error('Error toggling fullscreen:', error);
    }
}

void init();

CSS

/* 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;
}

HTML

<html>
    <head>
        <title>Replacing Default Controls</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <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))})({
                key: "GOOGLE_MAPS_API_KEY"
            });
        </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>

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/control-replacement
  npm start