Transit Layer
Page Summary
This example demonstrates how to display the public transit network of London using the Google Maps JavaScript API.
It uses the
TransitLayerclass 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.
This example creates a map that displays the public transit network of London,UK.
Read thedocumentation.
TypeScript
functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:13,center:{lat:51.501904,lng:-0.115871},});consttransitLayer=newgoogle.maps.TransitLayer();transitLayer.setMap(map);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{zoom:13,center:{lat:51.501904,lng:-0.115871},});consttransitLayer=newgoogle.maps.TransitLayer();transitLayer.setMap(map);}window.initMap=initMap;
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></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 theseinstructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
gitclone-bsample-layer-transithttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart
Other samples can be tried by switching to any branch beginning withsample-SAMPLE_NAME.
gitcheckoutsample-SAMPLE_NAMEnpminpmstart
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Last updated 2025-12-18 UTC.