This example demonstrates the use of the DirectionsService
object
to fetch directions between draggable markers.
Read the documentation.
TypeScript
function initMap(): void { const map = new google.maps.Map( document.getElementById("map") as HTMLElement, { zoom: 4, center: { lat: -24.345, lng: 134.46 }, // Australia. } ); const directionsService = new google.maps.DirectionsService(); const directionsRenderer = new google.maps.DirectionsRenderer({ draggable: true, map, panel: document.getElementById("panel") as HTMLElement, }); directionsRenderer.addListener("directions_changed", () => { const directions = directionsRenderer.getDirections(); if (directions) { computeTotalDistance(directions); } }); displayRoute( "Perth, WA", "Sydney, NSW", directionsService, directionsRenderer ); } function displayRoute( origin: string, destination: string, service: google.maps.DirectionsService, display: google.maps.DirectionsRenderer ) { service .route({ origin: origin, destination: destination, waypoints: [ { location: "Adelaide, SA" }, { location: "Broken Hill, NSW" }, ], travelMode: google.maps.TravelMode.DRIVING, avoidTolls: true, }) .then((result: google.maps.DirectionsResult) => { display.setDirections(result); }) .catch((e) => { alert("Could not display directions due to: " + e); }); } function computeTotalDistance(result: google.maps.DirectionsResult) { let total = 0; const myroute = result.routes[0]; if (!myroute) { return; } for (let i = 0; i < myroute.legs.length; i++) { total += myroute.legs[i]!.distance!.value; } total = total / 1000; (document.getElementById("total") as HTMLElement).innerHTML = total + " km"; } declare global { interface Window { initMap: () => void; } } window.initMap = initMap;
JavaScript
function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 4, center: { lat: -24.345, lng: 134.46 }, // Australia. }); const directionsService = new google.maps.DirectionsService(); const directionsRenderer = new google.maps.DirectionsRenderer({ draggable: true, map, panel: document.getElementById("panel"), }); directionsRenderer.addListener("directions_changed", () => { const directions = directionsRenderer.getDirections(); if (directions) { computeTotalDistance(directions); } }); displayRoute( "Perth, WA", "Sydney, NSW", directionsService, directionsRenderer, ); } function displayRoute(origin, destination, service, display) { service .route({ origin: origin, destination: destination, waypoints: [ { location: "Adelaide, SA" }, { location: "Broken Hill, NSW" }, ], travelMode: google.maps.TravelMode.DRIVING, avoidTolls: true, }) .then((result) => { display.setDirections(result); }) .catch((e) => { alert("Could not display directions due to: " + e); }); } function computeTotalDistance(result) { let total = 0; const myroute = result.routes[0]; if (!myroute) { return; } for (let i = 0; i < myroute.legs.length; i++) { total += myroute.legs[i].distance.value; } total = total / 1000; document.getElementById("total").innerHTML = total + " km"; } window.initMap = initMap;
CSS
/* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; } #container { height: 100%; display: flex; } #sidebar { flex-basis: 15rem; flex-grow: 1; padding: 1rem; max-width: 30rem; height: 100%; box-sizing: border-box; overflow: auto; } #map { flex-basis: 0; flex-grow: 4; height: 100%; }
HTML
<html> <head> <title>Draggable Directions</title> <link rel="stylesheet" type="text/css" href="./style.css" /> <script type="module" src="./index.js"></script> </head> <body> <div id="container"> <div id="map"></div> <div id="sidebar"> <p>Total Distance: <span id="total"></span></p> <div id="panel"></div> </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 these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
git clone -b sample-directions-draggable 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