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>

    <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>
    <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();
      infoWindow.setContent(marker.title);
      infoWindow.open(marker.map, marker);
    });
  });
}

void init();