routes-compute-routes

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 routes</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <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))})({
                key: "GOOGLE_MAPS_API_KEY" 
            });
        </script>
    </head>

    <body>
        <div class="main-content">
            <div class="alert" id="alert">
                <p>error</p>
                <button class="button-secondary close">&times;</button>
            </div>
            <div class="control-panel">
                <form id="compute-routes-form">
                    <section>
                        <h2>Input locations</h2>
                        <div class="row">
                            <div class="location-input-wrapper">
                                <label class="text">Origin*</label>
                                <div id="origin-input"></div>
                            </div>
                            <div class="heading-wrapper">
                                <label for="heading_org" class="text"
                                    >Heading</label
                                >
           ...

CSS

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

html,
body {
    height: 100%;
    font-size: 100%;
    font-family: 'Google Sans', sans-serif;
    margin: 0;
    background-color: #fff;
}

* {
    box-sizing: border-box;
}

h2,
h3 {
    color: #222;
    font-style: normal;
    font-weight: normal;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    margin-top: 0.2rem;
}

h2 {
    font-weight: bold;
    font-size: 1rem;
}

h3 {
    font-size: 0.8rem;
}

p {
    font-size: 0.8rem;
    margin: 0 0 0.6rem 0;
}

label {
    color: #4d4d4d;
    display: inline-block;
    margin: 0;
    position: relative;
    z-index: 2;
    font-size: 0.875rem;
}

input[type='text'] {
    height: 50px;
    width: 100%;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #ccc;
}

ul {
    list-style: none;
    padding-inline-start: 0.25rem;
}

select {
    appearance: none;
    background-image: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZlcnNpb249IjEuMSIgeD0iMTJweCIgeT0iMHB4IiB3aWR0aD0iMjRweCIgaGVpZ2h0PSIzcHgiIHZpZXdCb3g9IjAgMCA2IDMiIGVuYWJsZS1iYWNrZ3JvdW5kPSJuZXcgMCAwIDYgMyIgeG1sOnNwYWNlPSJwcmVzZXJ2ZSI+PHBvbHlnb24gcG9pbnRzPSI1Ljk5MiwwIDIuOTkyLDMgLTAuMDA4LDAgIi8+PC9zdmc+);
    background-position: 100% center;
    background-repeat: no-repeat;
    padding-right: 1.5rem;

    &:disabled {
        background-color: #ddd;
        cursor: default;
    }

    &[multiple] {
        height: auto;
    }
}

select,
input[type='datetime-local'] {
    height: 2.3125rem;
    width: 100%;
    border-style: solid;
    border-width: 1px;
    border-color: #ccc;
    border-radius: 4px;
    padding: 0.3rem;
    font-family: inherit;
    font-size: 0.8rem;
}

button {
    min-height: 3rem;
    min-width: 3rem;
    cursor: pointer;
    font-family: inherit;
    font-weight: normal;
    font-size: 0.875rem;
    line-height: normal;
    padding: 0 1.5rem;
    position: relative;
   ...

JavaScript

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

let markers = [];
let polylines = [];

const originAutocompleteSelection = {
    predictionText: null,
    location: null,
};
const destinationAutocompleteSelection = {
    predictionText: null,
    location: null,
};

async function init() {
    const [
        { InfoWindow },
        { AdvancedMarkerElement },
        { PlaceAutocompleteElement },
        { ComputeRoutesExtraComputation, ReferenceRoute, Route, RouteLabel },
    ] = await Promise.all([
        google.maps.importLibrary('maps'),
        google.maps.importLibrary('marker'),
        google.maps.importLibrary('places'),
        google.maps.importLibrary('routes'),
    ]);

    const map = document.getElementById('map');

    attachSubmitListener();
    initializeLocationInputs();
    attachMapClickListener();
    attachTravelModeListener();
    attachAlertWindowListener();
    attachDepartureTimeListener();

    function attachSubmitListener() {
        const computeRoutesForm = document.getElementById(
            'compute-routes-form'
        );

        computeRoutesForm.addEventListener('submit', (event) => {
            event.preventDefault();
            void sendRequest(new FormData(computeRoutesForm));
        });
    }

    async function sendRequest(formData) {
        clearMap();

        try {
            const { routes } = await Route.computeRoutes(
                buildComputeRoutesJsRequest(formData)
            );

            if (!routes) {
                console.log('No routes returned.');
                return;
            }

            console.log('Routes:');
            routes.forEach((route) => {
                console.log(route.toJSON());
            });

            await Promise.all(
                routes.map((route) =>
                    drawRoute(
                        route,
                       ...