Synchronous Loading

In this example, the Maps API is loaded synchronously. We omitted the defer attribute from the script tag that loads the API, and we also omitted the callback parameter.

<!DOCTYPE html>
<html>
  <head>
    <title>Synchronous Loading</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
  </head>
  <body>
    <div id="map"></div>
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&v=weekly"></script>
    <script src="./index.js"></script>
  </body>
</html>sample.html

When the API is loaded synchronously, subsequent script tags will not execute until the API is fully loaded. Because of this, the final script tag can call new google.maps.Map and assume that google.maps.Map has been defined.

Read the documentation.

TypeScript

const map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
  center: { lat: -34.397, lng: 150.644 },
  zoom: 8,
});index.ts

JavaScript

const map = new google.maps.Map(document.getElementById("map"), {
  center: { lat: -34.397, lng: 150.644 },
  zoom: 8,
});
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

<!DOCTYPE html>
<html>
  <head>
    <title>Synchronous Loading</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
  </head>
  <body>
    <div id="map"></div>
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&v=weekly"></script>
    <script src="./index.js"></script>
  </body>
</html>sample.html

All

<!DOCTYPE html>
<html>
  <head>
    <title>Synchronous Loading</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <style type="text/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>
  </head>
  <body>
    <div id="map"></div>
    <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&v=weekly"></script>
    <script>
      const map = new google.maps.Map(document.getElementById("map"), {
        center: { lat: -34.397, lng: 150.644 },
        zoom: 8,
      });
    </script>
  </body>
</html>
inline.html

const map = new google.maps.Map(document.getElementById("map"), { center: { lat: -34.397, lng: 150.644 }, zoom: 8, });

/* 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; }

<!DOCTYPE html> <html> <head> <title>Synchronous Loading</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>  </head> <body> <div id="map"></div> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&v=weekly"></script> <script src="./index.js" data-inline></script> </body> </html>

Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM.

npx @googlemaps/js-samples init map-sync DESTINATION_FOLDER

Run in Google Cloud Shell

Google Cloud Shell is an interactive shell environment for Google Cloud Platform that makes it easy for you to learn and experiment with GCP and manage your projects and resources from your web browser.

Run in Cloud Shell