Es kann losgehen!

Bevor Sie mit der Entwicklung beginnen, lesen Sie bitte unsere Entwicklerdokumentation.

Die Google Maps JavaScript API aktivieren

Zum Einstieg führen wir Sie durch die Google Developers Console, wo Sie vorab Folgendes tun müssen:

  1. Ein Projekt erstellen oder auswählen
  2. Die Google Maps JavaScript API und zugehörige Dienste aktivieren
  3. Zugehörige Schlüssel erstellen
Weiter

Data Layer: Dynamic Styling

Read the documentation or view this example full screen.

var map;
function initMap() {
  map = new google.maps.Map(document.getElementById('map'), {
    zoom: 4,
    center: {lat: -28, lng: 137}
  });

  // Load GeoJSON.
  map.data.loadGeoJson(
      'https://storage.googleapis.com/mapsdevsite/json/google.json');

  // Color each letter gray. Change the color when the isColorful property
  // is set to true.
  map.data.setStyle(function(feature) {
    var color = 'gray';
    if (feature.getProperty('isColorful')) {
      color = feature.getProperty('color');
    }
    return /** @type {google.maps.Data.StyleOptions} */({
      fillColor: color,
      strokeColor: color,
      strokeWeight: 2
    });
  });

  // When the user clicks, set 'isColorful', changing the color of the letters.
  map.data.addListener('click', function(event) {
    event.feature.setProperty('isColorful', true);
  });

  // When the user hovers, tempt them to click by outlining the letters.
  // Call revertStyle() to remove all overrides. This will use the style rules
  // defined in the function passed to setStyle()
  map.data.addListener('mouseover', function(event) {
    map.data.revertStyle();
    map.data.overrideStyle(event.feature, {strokeWeight: 8});
  });

  map.data.addListener('mouseout', function(event) {
    map.data.revertStyle();
  });
}
<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>


Probieren Sie es selbst aus

Bewegen Sie die Maus oben rechts über den Codeblock, um den Code zu kopieren, oder öffnen Sie ihn in JSFiddle.

<!DOCTYPE html>
<html>
  <head>
    <title>Data Layer: Dynamic Styling</title>
    <meta name="viewport" content="initial-scale=1.0">
    <meta charset="utf-8">
    <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>

      var map;
      function initMap() {
        map = new google.maps.Map(document.getElementById('map'), {
          zoom: 4,
          center: {lat: -28, lng: 137}
        });

        // Load GeoJSON.
        map.data.loadGeoJson(
            'https://storage.googleapis.com/mapsdevsite/json/google.json');

        // Color each letter gray. Change the color when the isColorful property
        // is set to true.
        map.data.setStyle(function(feature) {
          var color = 'gray';
          if (feature.getProperty('isColorful')) {
            color = feature.getProperty('color');
          }
          return /** @type {google.maps.Data.StyleOptions} */({
            fillColor: color,
            strokeColor: color,
            strokeWeight: 2
          });
        });

        // When the user clicks, set 'isColorful', changing the color of the letters.
        map.data.addListener('click', function(event) {
          event.feature.setProperty('isColorful', true);
        });

        // When the user hovers, tempt them to click by outlining the letters.
        // Call revertStyle() to remove all overrides. This will use the style rules
        // defined in the function passed to setStyle()
        map.data.addListener('mouseover', function(event) {
          map.data.revertStyle();
          map.data.overrideStyle(event.feature, {strokeWeight: 8});
        });

        map.data.addListener('mouseout', function(event) {
          map.data.revertStyle();
        });
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>

Feedback geben zu...

Google Maps JavaScript API
Google Maps JavaScript API