routes-get-directions

Sample code supporting Google Maps Platform JavaScript API documentation. author(s): Geo Developer IX Documentation Team

HTML

<!doctype html>
<!--
 @license
 Copyright 2025 Google LLC. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0
-->

<html>
  <head>
    <title>Get directions</title>

    <script>
      // prettier-ignore
      (g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})({
            });
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

CSS

/*
 * @license
 * Copyright 2025 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

/*
 * 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;
}

JavaScript

'use strict';
/*
 * @license
 * Copyright 2025 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

// Initialize and add the map.
let map;
let mapPolylines = [];
const center = { lat: 37.447646, lng: -122.113878 }; // Palo Alto, CA

// Initialize and add the map.
async function init() {
  //  Request the needed libraries.
  const [{ Map }, { Place }, { Route }] = await Promise.all([
    google.maps.importLibrary('maps'),
    google.maps.importLibrary('places'),
    google.maps.importLibrary('routes'),
  ]);

  map = new Map(document.getElementById('map'), {
    zoom: 12,
    center,
    mapTypeControl: false,
    mapId: 'DEMO_MAP_ID',
  });

  // Use address strings in a directions request.
  const requestWithAddressStrings = {
    origin: '1600 Amphitheatre Parkway, Mountain View, CA',
    destination: '345 Spear Street, San Francisco, CA',
    fields: ['path'],
  };

  console.log({ requestWithAddressStrings });

  // Use Place IDs in a directions request.
  const originPlaceInstance = new Place({
    id: 'ChIJiQHsW0m3j4ARm69rRkrUF3w', // Mountain View, CA
  });

  const destinationPlaceInstance = new Place({
    id: 'ChIJIQBpAG2ahYAR_6128GcTUEo', // San Francisco, CA
  });

  const requestWithPlaceIds = {
    origin: originPlaceInstance,
    destination: destinationPlaceInstance,
    fields: ['path'], // Request fields needed to draw polylines.
  };

  console.log({ requestWithPlaceIds });

  // Use lat/lng in a directions request.
  // Mountain View, CA
  const originLatLng = { lat: 37.422, lng: -122.084058 };
  // San Francisco, CA
  const destinationLatLng = { lat: 37.774929, lng: -122.419415 };

  // Define a computeRoutes request.
  const requestWithLatLngs = {
    origin: originLatLng,
    destination: destinationLatLng,
    fields: ['path'],
  };

  console.log({ requestWithLatLngs });

  // Use Plus Codes in a directions request.
  const requestWithPlusCodes = {
    origin: '849VCWC8+R9', // Mountain View, CA
    destination:...