How to dynamically create markers on Google Maps API from array after processing by GeoCoder?

B

Berkutman2020-02-23 17:51:33

JavaScript

Berkutman, 2020-02-23 17:51:33

The task is to dynamically add markers on the map after processing the array by the geocoder at the address, in the future, instead of the array, I will take data from the database. Tell me how to implement it, while from the Google documentation I figured out how to do the following, but even everything is bad.

<!DOCTYPE html>
<html>
  <head>
    <title>Geocoding service</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <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 geocoder;
      var map;
    var address = new Array ('Moscow', 'Kurgan');
    
      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
    center: new google.maps.LatLng(61.52401, 105.31875600000001),
    zoom: 3
        });
        geocoder = new google.maps.Geocoder();
        codeAddress(geocoder, map);
      }

for (i=0; i<adress.length; i++) {


      function codeAddress(geocoder, map) {
        geocoder.geocode({'address': adress[i]}, function(results, status) {
          if (status === 'OK') {
            var marker = new google.maps.Marker({
              map: map,
              position: results[0].geometry.location
            });
          } else {
            alert('Geocode was not successful for the following reason: ' + status);
          }
        });
      }
    };
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=API-KEY&callback=initMap">
    </script>
  </body>
</html>

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1 answer(s)

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0xD34F, 2020-02-23
@Berkutman

CodeAddress function declaration - remove the loop; pass the address as a parameter to the function itself:

function codeAddress(address, geocoder, map) {
  geocoder.geocode({ address }, function(results, status) {
    if (status === 'OK') {
      new google.maps.Marker({
        map: map,
        position: results[0].geometry.location,
      });
    } else {
      alert('Geocode was not successful for the following reason: ' + status);
    }
  });
}

In initMap iterate over the array of addresses, call codeAddress for each:

address.forEach(n => codeAddress(n, geocoder, map));