advanced-markers-accessibility

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

HTML

<!doctype html>
<!--
 @license
 Copyright 2019 Google LLC. All Rights Reserved.
 SPDX-License-Identifier: Apache-2.0
-->

<html>
    <head>
        <title>Advanced Marker Accessibility</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>
        <gmp-map
            zoom="12"
            center="34.84555,-111.8035"
            map-id="4504f8b37365c3d0"></gmp-map>
    </body>
</html>

CSS

/**
 * @license
 * Copyright 2019 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 2019 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */

const mapElement = document.querySelector('gmp-map');

async function init() {
    // Request needed libraries.
    const [{ InfoWindow }, { AdvancedMarkerElement, PinElement }] =
        await Promise.all([
            google.maps.importLibrary('maps'),
            google.maps.importLibrary('marker'),
        ]);

    // Set LatLng and title text for the markers. The first marker (Boynton Pass)
    // receives the initial focus when tab is pressed. Use arrow keys to move
    // between markers; press tab again to cycle through the map controls.
    const tourStops = [
        {
            position: { lat: 34.8791806, lng: -111.8265049 },
            title: 'Boynton Pass',
        },
        {
            position: { lat: 34.8559195, lng: -111.7988186 },
            title: 'Airport Mesa',
        },
        {
            position: { lat: 34.832149, lng: -111.7695277 },
            title: 'Chapel of the Holy Cross',
        },
        {
            position: { lat: 34.823736, lng: -111.8001857 },
            title: 'Red Rock Crossing',
        },
        {
            position: { lat: 34.800326, lng: -111.7665047 },
            title: 'Bell Rock',
        },
    ];

    // Create an info window to share between markers.
    const infoWindow = new InfoWindow();

    // Create the markers.
    tourStops.forEach(({ position, title }, i) => {
        const pin = new PinElement({
            glyphText: `${i + 1}`,
            scale: 1.5,
        });
        const marker = new AdvancedMarkerElement({
            position,
            title: `${i + 1}. ${title}`,
            gmpClickable: true,
        });
        marker.append(pin);
        mapElement.append(marker);

        // Add a click listener for each marker, and set up the info window.
        marker.addEventListener('gmp-click', () => {
            infoWindow.close();
           ...