Make markers draggable

  • This example demonstrates creating a draggable marker on a Google Map using the Maps JavaScript API.

  • The marker's position updates and is displayed in an info window when the drag action ends.

  • The sample code utilizes the AdvancedMarkerElement and provides implementations in both JavaScript and TypeScript.

  • Users can interact with a live version of the map or clone the sample code to run it locally.

This example map shows a draggable marker that displays its updated position when dragging is finished (the gmp-dragend event is fired).

Read the documentation.

TypeScript

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

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

    const infoWindow = new InfoWindow();

    const draggableMarker = new AdvancedMarkerElement({
        position: { lat: 37.39094933041195, lng: -122.02503913145092 },
        gmpDraggable: true,
        title: 'This marker is draggable.',
    });
    mapElement.append(draggableMarker);

    draggableMarker.addEventListener('gmp-dragend', () => {
        const position = draggableMarker.position as google.maps.LatLngAltitude;
        infoWindow.close();
        infoWindow.setContent(
            `Pin dropped at: ${String(position.lat)}, ${String(position.lng)}`
        );
        infoWindow.open(draggableMarker.map, draggableMarker);
    });
}

void init();

JavaScript

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

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

    const infoWindow = new InfoWindow();

    const draggableMarker = new AdvancedMarkerElement({
        position: { lat: 37.39094933041195, lng: -122.02503913145092 },
        gmpDraggable: true,
        title: 'This marker is draggable.',
    });
    mapElement.append(draggableMarker);

    draggableMarker.addEventListener('gmp-dragend', () => {
        const position = draggableMarker.position;
        infoWindow.close();
        infoWindow.setContent(
            `Pin dropped at: ${String(position.lat)}, ${String(position.lng)}`
        );
        infoWindow.open(draggableMarker.map, draggableMarker);
    });
}

void init();

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
gmp-map {
    height: 100%;
}

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

HTML

<html>
    <head>
        <title>Draggable Advanced Marker</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>
        <gmp-map
            center="37.39094933041195,-122.02503913145092"
            zoom="14"
            map-id="4504f8b37365c3d0"></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/advanced-markers-draggable
  npm start