Lat/Lng Object Literal

This example demonstrates using a LatLng object literal instead of a google.maps.LatLng object, to center the map and add a marker. LatLng object literals are a convenient way to add a LatLng coordinate and, in most cases, can be used in place of a google.maps.LatLng object.

Read the documentation.

TypeScript

// In this example, we center the map, and add a marker, using a LatLng object
// literal instead of a google.maps.LatLng object. LatLng object literals are
// a convenient way to add a LatLng coordinate and, in most cases, can be used
// in place of a google.maps.LatLng object.

let map: google.maps.Map;

function initMap(): void {
  const mapOptions = {
    zoom: 8,
    center: { lat: -34.397, lng: 150.644 },
  };

  map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    mapOptions
  );

  const marker = new google.maps.Marker({
    // The below line is equivalent to writing:
    // position: new google.maps.LatLng(-34.397, 150.644)
    position: { lat: -34.397, lng: 150.644 },
    map: map,
  });

  // You can use a LatLng literal in place of a google.maps.LatLng object when
  // creating the Marker object. Once the Marker object is instantiated, its
  // position will be available as a google.maps.LatLng object. In this case,
  // we retrieve the marker's position using the
  // google.maps.LatLng.getPosition() method.
  const infowindow = new google.maps.InfoWindow({
    content: "<p>Marker Location:" + marker.getPosition() + "</p>",
  });

  google.maps.event.addListener(marker, "click", () => {
    infowindow.open(map, marker);
  });
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;
index.ts

JavaScript

// In this example, we center the map, and add a marker, using a LatLng object
// literal instead of a google.maps.LatLng object. LatLng object literals are
// a convenient way to add a LatLng coordinate and, in most cases, can be used
// in place of a google.maps.LatLng object.
let map;

function initMap() {
  const mapOptions = {
    zoom: 8,
    center: { lat: -34.397, lng: 150.644 },
  };

  map = new google.maps.Map(document.getElementById("map"), mapOptions);

  const marker = new google.maps.Marker({
    // The below line is equivalent to writing:
    // position: new google.maps.LatLng(-34.397, 150.644)
    position: { lat: -34.397, lng: 150.644 },
    map: map,
  });
  // You can use a LatLng literal in place of a google.maps.LatLng object when
  // creating the Marker object. Once the Marker object is instantiated, its
  // position will be available as a google.maps.LatLng object. In this case,
  // we retrieve the marker's position using the
  // google.maps.LatLng.getPosition() method.
  const infowindow = new google.maps.InfoWindow({
    content: "<p>Marker Location:" + marker.getPosition() + "</p>",
  });

  google.maps.event.addListener(marker, "click", () => {
    infowindow.open(map, marker);
  });
}

window.initMap = initMap;
index.js

CSS

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

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

style.css

HTML

<html>
  <head>
    <title>Lat/Lng Object Literal</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>

    <!-- 
      The `defer` attribute causes the script to execute after the full HTML
      document has been parsed. For non-blocking uses, avoiding race conditions,
      and consistent behavior across browsers, consider loading using Promises. See
      https://developers.google.com/maps/documentation/javascript/load-maps-js-api
      for more information.
      -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly"
      defer
    ></script>
  </body>
</html>
index.html

Try Sample

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application. 

  git clone -b sample-map-latlng-literal https://github.com/googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME. 

  git checkout sample-SAMPLE_NAME
  npm i
  npm start