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This example creates a map that displays the public transit network of London, UK.
Read the documentation.
TypeScriptfunction initMap(): void {
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 13,
center: { lat: 51.501904, lng: -0.115871 },
}
);
const transitLayer = new google.maps.TransitLayer();
transitLayer.setMap(map);
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;Note: Read the guide on using TypeScript and Google Maps. JavaScript
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 13,
center: { lat: 51.501904, lng: -0.115871 },
});
const transitLayer = new google.maps.TransitLayer();
transitLayer.setMap(map);
}
window.initMap = initMap;Note: The JavaScript is compiled from the TypeScript snippet. 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;
}
HTML
<html>
<head>
<title>Transit Layer</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> 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-layer-transit https://github.com/googlemaps/js-samples.gitcd js-samplesnpm inpm start
Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.
git checkout sample-SAMPLE_NAMEnpm inpm start
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-07-09 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["This example demonstrates how to display the public transit network of London using the Google Maps JavaScript API."],["It uses the `TransitLayer` class to overlay transit data onto a basic map centered on London."],["The code provides implementations in both TypeScript and JavaScript, with the JavaScript version being compiled from TypeScript."],["The sample includes HTML, CSS, and JavaScript/TypeScript code to create a fully functional web page displaying the map."],["Users can interact with the sample via provided links to JSFiddle, Google Cloud Shell, or by cloning and running the code locally."]]],[]]
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