以上で完了です。

開発を始めるには、デベロッパー ドキュメント をご覧下さい。

Google Maps JavaScript API をアクティベートする

まず初めに Google Developers Console で次の作業を行います。

  1. プロジェクトを作成または選択する
  2. Google Maps JavaScript API と関連サービスをアクティベートする
  3. 適切なキーを作成する
続ける

Info window with maxWidth

Read the documentation or view this example full screen.

// This example displays a marker at the center of Australia.
// When the user clicks the marker, an info window opens.
// The maximum width of the info window is set to 200 pixels.

function initMap() {
  var uluru = {lat: -25.363, lng: 131.044};
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 4,
    center: uluru
  });

  var contentString = '<div id="content">'+
      '<div id="siteNotice">'+
      '</div>'+
      '<h1 id="firstHeading" class="firstHeading">Uluru</h1>'+
      '<div id="bodyContent">'+
      '<p><b>Uluru</b>, also referred to as <b>Ayers Rock</b>, is a large ' +
      'sandstone rock formation in the southern part of the '+
      'Northern Territory, central Australia. It lies 335&#160;km (208&#160;mi) '+
      'south west of the nearest large town, Alice Springs; 450&#160;km '+
      '(280&#160;mi) by road. Kata Tjuta and Uluru are the two major '+
      'features of the Uluru - Kata Tjuta National Park. Uluru is '+
      'sacred to the Pitjantjatjara and Yankunytjatjara, the '+
      'Aboriginal people of the area. It has many springs, waterholes, '+
      'rock caves and ancient paintings. Uluru is listed as a World '+
      'Heritage Site.</p>'+
      '<p>Attribution: Uluru, <a href="https://en.wikipedia.org/w/index.php?title=Uluru&oldid=297882194">'+
      'https://en.wikipedia.org/w/index.php?title=Uluru</a> '+
      '(last visited June 22, 2009).</p>'+
      '</div>'+
      '</div>';

  var infowindow = new google.maps.InfoWindow({
    content: contentString,
    maxWidth: 200
  });

  var marker = new google.maps.Marker({
    position: uluru,
    map: map,
    title: 'Uluru (Ayers Rock)'
  });
  marker.addListener('click', function() {
    infowindow.open(map, marker);
  });
}
<div id="map"></div>
/* 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;
}
 <!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>

実際に試す

コードブロックの右上にカーソルを合わせて、コードをコピーするか、コードを JSFiddl で開きます。

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Info window with <code>maxWidth</code></title>
    <style>
      /* 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;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>

      // This example displays a marker at the center of Australia.
      // When the user clicks the marker, an info window opens.
      // The maximum width of the info window is set to 200 pixels.

      function initMap() {
        var uluru = {lat: -25.363, lng: 131.044};
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 4,
          center: uluru
        });

        var contentString = '<div id="content">'+
            '<div id="siteNotice">'+
            '</div>'+
            '<h1 id="firstHeading" class="firstHeading">Uluru</h1>'+
            '<div id="bodyContent">'+
            '<p><b>Uluru</b>, also referred to as <b>Ayers Rock</b>, is a large ' +
            'sandstone rock formation in the southern part of the '+
            'Northern Territory, central Australia. It lies 335&#160;km (208&#160;mi) '+
            'south west of the nearest large town, Alice Springs; 450&#160;km '+
            '(280&#160;mi) by road. Kata Tjuta and Uluru are the two major '+
            'features of the Uluru - Kata Tjuta National Park. Uluru is '+
            'sacred to the Pitjantjatjara and Yankunytjatjara, the '+
            'Aboriginal people of the area. It has many springs, waterholes, '+
            'rock caves and ancient paintings. Uluru is listed as a World '+
            'Heritage Site.</p>'+
            '<p>Attribution: Uluru, <a href="https://en.wikipedia.org/w/index.php?title=Uluru&oldid=297882194">'+
            'https://en.wikipedia.org/w/index.php?title=Uluru</a> '+
            '(last visited June 22, 2009).</p>'+
            '</div>'+
            '</div>';

        var infowindow = new google.maps.InfoWindow({
          content: contentString,
          maxWidth: 200
        });

        var marker = new google.maps.Marker({
          position: uluru,
          map: map,
          title: 'Uluru (Ayers Rock)'
        });
        marker.addListener('click', function() {
          infowindow.open(map, marker);
        });
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>

フィードバックを送信...

Google Maps JavaScript API
Google Maps JavaScript API
ご不明な点がありましたら、Google のサポートページをご覧ください。