如何在Google地图上绑定城市？

<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap" async defer></script>

function initMap() {
  var geocoder = new google.maps.Geocoder();
  geocoder.geocode({ 'address': 'YOUR_CITY_NAME' }, function(results, status) {
    if (status === 'OK') {
      var map = new google.maps.Map(document.getElementById('map'), {
        center: results[0].geometry.location,
        zoom: 12
      });
      var marker = new google.maps.Marker({
        map: map,
        position: results[0].geometry.location
      });
    } else {
      alert('Geocode was not successful for the following reason: ' + status);
    }
  });
}

<div id="map" style="width: 100%; height: 400px;"></div>