Toggle light and dark modes

This sample demonstrates how to change the appearance of the map using light and dark modes.

TypeScript

async function init() {
    const { Map3DElement } = await google.maps.importLibrary('maps3d');

    // By default, the map follows the system's light or dark mode setting.
    const map = new Map3DElement({
        center: {
            lat: 40.758,
            lng: -73.9855,
            altitude: 0,
        },
        range: 2000,
        tilt: 60,
        heading: 30,
        mode: 'ROADMAP',
    });

    document.body.append(map);

    const toggleButton = document.getElementById(
        'toggle-button'
    ) as HTMLButtonElement;

    // Start from the system setting so that the button matches the map.
    let isDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;
    updateButtonText();

    toggleButton.addEventListener('click', () => {
        isDarkMode = !isDarkMode;
        // Override the system setting by switching to light or dark mode.
        map.colorScheme = isDarkMode ? 'DARK' : 'LIGHT';
        updateButtonText();
    });

    function updateButtonText() {
        toggleButton.textContent = isDarkMode
            ? 'Switch to light mode'
            : 'Switch to dark mode';
    }
}

void init();

JavaScript

async function init() {
    const { Map3DElement } = await google.maps.importLibrary('maps3d');

    // By default, the map follows the system's light or dark mode setting.
    const map = new Map3DElement({
        center: {
            lat: 40.758,
            lng: -73.9855,
            altitude: 0,
        },
        range: 2000,
        tilt: 60,
        heading: 30,
        mode: 'ROADMAP',
    });

    document.body.append(map);

    const toggleButton = document.getElementById('toggle-button');

    // Start from the system setting so that the button matches the map.
    let isDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;
    updateButtonText();

    toggleButton.addEventListener('click', () => {
        isDarkMode = !isDarkMode;
        // Override the system setting by switching to light or dark mode.
        map.colorScheme = isDarkMode ? 'DARK' : 'LIGHT';
        updateButtonText();
    });

    function updateButtonText() {
        toggleButton.textContent = isDarkMode
            ? 'Switch to light mode'
            : 'Switch to dark mode';
    }
}

void init();

CSS

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'Roboto', 'Helvetica', 'Arial', sans-serif;
}

gmp-map-3d {
    height: 100%;
    width: 100%;
}

.toggle-button {
    background: rgb(235, 235, 235);
    color: black;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    position: fixed;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
}

.toggle-button:hover {
    background-color: #007bff;
    color: white;
}

HTML

<html>
    <head>
        <title>3d-map-light-dark-toggle</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <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>
        <button id="toggle-button" class="toggle-button" type="button">
            Switch to dark mode
        </button>
    </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/3d-map-light-dark-toggle
  npm start