javascript - Google maps api geocoder is not working - Stack Overflow

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I am trying to convert a zip code into lat and lng using geocoder. I looked at the Google Maps Api example and followed several tutorials, but for some reason for lat and lng it returns "". Here is my code.

(function(window, google, address) {
  var geocoder = new google.maps.Geocoder();
  var lat = "";
  var lng = "";
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    var test = results[0];
    lat = results[0].geometry.location.lat(); // lat is still equal to ""
    lng = results[0].geometry.location.lng(); // lng is still equal to ""
  });

  var options = {
      center: {
        lat: lat,
        lng: lng
      },
      zoom: 5
    },
    element = document.getElementById('map-canvas')
  var map = new google.maps.Map(element, options)
}(window, window.google, 98107));

html,
body,
#map-canvas {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

<script src=""></script>
<div id="map-canvas"></div>

I am trying to convert a zip code into lat and lng using geocoder. I looked at the Google Maps Api example and followed several tutorials, but for some reason for lat and lng it returns "". Here is my code.

(function(window, google, address) {
  var geocoder = new google.maps.Geocoder();
  var lat = "";
  var lng = "";
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    var test = results[0];
    lat = results[0].geometry.location.lat(); // lat is still equal to ""
    lng = results[0].geometry.location.lng(); // lng is still equal to ""
  });

  var options = {
      center: {
        lat: lat,
        lng: lng
      },
      zoom: 5
    },
    element = document.getElementById('map-canvas')
  var map = new google.maps.Map(element, options)
}(window, window.google, 98107));

html,
body,
#map-canvas {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

<script src="https://maps.googleapis./maps/api/js"></script>
<div id="map-canvas"></div>

• javascript
• google-maps

Share Improve this question Follow edited Jul 20, 2017 at 22:12 geocodezip 161k1414 gold badges226226 silver badges255255 bronze badges asked Jul 20, 2017 at 21:02 AaronAaron 4,4802121 gold badges9292 silver badges151151 bronze badges

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2 Answers 2

Sorted by: Reset to default 4

The geocoder is asynchronous. You need to use the data returned in the callback function when/where it exists.

(function(window, google, address) {
  var geocoder = new google.maps.Geocoder();
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    var options = {
        center: results[0].geometry.location,
        zoom: 5
      },
      element = document.getElementById('map-canvas')
    var map = new google.maps.Map(element, options)
  });
}(window, window.google, "98107"));

Another issue with the posted code is the address passed into the geocoder must be a string (so "98107", not 98107), if it isn't the API generates the error: InvalidValueError: in property address: not a string

(function(window, google, address) {
  var geocoder = new google.maps.Geocoder();
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    var options = {
        center: results[0].geometry.location,
        zoom: 5
      },
      element = document.getElementById('map-canvas')
    var map = new google.maps.Map(element, options)
  });

}(window, window.google, "98107"));

html,
body,
#map-canvas {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

<script src="https://maps.googleapis./maps/api/js"></script>
<div id="map-canvas"></div>

geocode() is an asynchronous function, and you need to wait for its callback to get the actual results.

In your code, you create the center object outside of the callback before the latitude and longitude values are even returned.

Try the following :

 geocoder.geocode({
     'address': address
 }, function(results, status) {
     var test = results[0];

     var options = {
         center: {
             lat: results[0].geometry.location.lat(),
             lng: results[0].geometry.location.lng()
         },
         zoom: 5
     }
 });

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