Geocoding Component Restrictions

This example creates a request to the geocoding service that restricts the results to a particular postal area within Sydney, Australia.

Read the documentation.

TypeScript

function initMap(): void {
  const geocoder = new google.maps.Geocoder();
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 8,
      center: { lat: -33.865, lng: 151.209 },
    }
  );

  (document.getElementById("submit") as HTMLElement).addEventListener(
    "click",
    () => {
      geocodeAddress(geocoder, map);
    }
  );
}

function geocodeAddress(geocoder: google.maps.Geocoder, map: google.maps.Map) {
  geocoder.geocode(
    {
      componentRestrictions: {
        country: "AU",
        postalCode: "2000",
      },
    },
    (
      results: google.maps.GeocoderResult[],
      status: google.maps.GeocoderStatus
    ) => {
      if (status === "OK") {
        map.setCenter(results[0].geometry.location);
        new google.maps.Marker({
          map,
          position: results[0].geometry.location,
        });
      } else {
        window.alert(
          "Geocode was not successful for the following reason: " + status
        );
      }
    }
  );
}
index.ts

JavaScript

function initMap() {
  const geocoder = new google.maps.Geocoder();
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 8,
    center: { lat: -33.865, lng: 151.209 },
  });
  document.getElementById("submit").addEventListener("click", () => {
    geocodeAddress(geocoder, map);
  });
}

function geocodeAddress(geocoder, map) {
  geocoder.geocode(
    {
      componentRestrictions: {
        country: "AU",
        postalCode: "2000",
      },
    },
    (results, status) => {
      if (status === "OK") {
        map.setCenter(results[0].geometry.location);
        new google.maps.Marker({
          map,
          position: results[0].geometry.location,
        });
      } else {
        window.alert(
          "Geocode was not successful for the following reason: " + status
        );
      }
    }
  );
}

index.js

CSS

/* 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;
}

#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: "Roboto", "sans-serif";
  line-height: 30px;
  padding-left: 10px;
}

style.css

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Geocoding Component Restriction</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./index.js"></script>
  </head>
  <body>
    <div id="floating-panel">
      <pre>componentRestrictions: {country: "AU", postalCode: "2000"}</pre>
      <button id="submit">Geocode</button>
    </div>
    <div id="map"></div>
  </body>
</html>
sample.html

All

<!DOCTYPE html>
<html>
  <head>
    <title>Geocoding Component Restriction</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <style type="text/css">
      /* 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;
      }

      #floating-panel {
        position: absolute;
        top: 10px;
        left: 25%;
        z-index: 5;
        background-color: #fff;
        padding: 5px;
        border: 1px solid #999;
        text-align: center;
        font-family: "Roboto", "sans-serif";
        line-height: 30px;
        padding-left: 10px;
      }
    </style>
    <script>
      function initMap() {
        const geocoder = new google.maps.Geocoder();
        const map = new google.maps.Map(document.getElementById("map"), {
          zoom: 8,
          center: { lat: -33.865, lng: 151.209 },
        });
        document.getElementById("submit").addEventListener("click", () => {
          geocodeAddress(geocoder, map);
        });
      }

      function geocodeAddress(geocoder, map) {
        geocoder.geocode(
          {
            componentRestrictions: {
              country: "AU",
              postalCode: "2000",
            },
          },
          (results, status) => {
            if (status === "OK") {
              map.setCenter(results[0].geometry.location);
              new google.maps.Marker({
                map,
                position: results[0].geometry.location,
              });
            } else {
              window.alert(
                "Geocode was not successful for the following reason: " + status
              );
            }
          }
        );
      }
    </script>
  </head>
  <body>
    <div id="floating-panel">
      <pre>componentRestrictions: {country: "AU", postalCode: "2000"}</pre>
      <button id="submit">Geocode</button>
    </div>
    <div id="map"></div>
  </body>
</html>

inline.html
function initMap() { const geocoder = new google.maps.Geocoder(); const map = new google.maps.Map(document.getElementById("map"), { zoom: 8, center: { lat: -33.865, lng: 151.209 }, }); document.getElementById("submit").addEventListener("click", () => { geocodeAddress(geocoder, map); }); } function geocodeAddress(geocoder, map) { geocoder.geocode( { componentRestrictions: { country: "AU", postalCode: "2000", }, }, (results, status) => { if (status === "OK") { map.setCenter(results[0].geometry.location); new google.maps.Marker({ map, position: results[0].geometry.location, }); } else { window.alert( "Geocode was not successful for the following reason: " + status ); } } ); }
/* 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; } #floating-panel { position: absolute; top: 10px; left: 25%; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; text-align: center; font-family: "Roboto", "sans-serif"; line-height: 30px; padding-left: 10px; }
<!DOCTYPE html> <html> <head> <title>Geocoding Component Restriction</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly" defer ></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="floating-panel"> <pre>componentRestrictions: {country: "AU", postalCode: "2000"}</pre> <button id="submit">Geocode</button> </div> <div id="map"></div> </body> </html>

Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM. 

npx @googlemaps/js-samples init geocoding-component-restriction DESTINATION_FOLDER

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