@react-google-maps/api/src/components/addons/MarkerClusterer.md

React.js Google Maps API integration

# MarkerClusterer example

```jsx
const { GoogleMap, LoadScript, MarkerClusterer, Marker } = require('../../');
const ScriptLoaded = require('../../docs/ScriptLoaded').default;

const mapContainerStyle = {
  height: '400px',
  width: '800px'
};

const center = { lat: -28.024, lng: 140.887 };

const locations = [
  { lat: -31.56391, lng: 147.154312 },
  { lat: -33.718234, lng: 150.363181 },
  { lat: -33.727111, lng: 150.371124 },
  { lat: -33.848588, lng: 151.209834 },
  { lat: -33.851702, lng: 151.216968 },
  { lat: -34.671264, lng: 150.863657 },
  { lat: -35.304724, lng: 148.662905 },
  { lat: -36.817685, lng: 175.699196 },
  { lat: -36.828611, lng: 175.790222 },
  { lat: -37.75, lng: 145.116667 },
  { lat: -37.759859, lng: 145.128708 },
  { lat: -37.765015, lng: 145.133858 },
  { lat: -37.770104, lng: 145.143299 },
  { lat: -37.7737, lng: 145.145187 },
  { lat: -37.774785, lng: 145.137978 },
  { lat: -37.819616, lng: 144.968119 },
  { lat: -38.330766, lng: 144.695692 },
  { lat: -39.927193, lng: 175.053218 },
  { lat: -41.330162, lng: 174.865694 },
  { lat: -42.734358, lng: 147.439506 },
  { lat: -42.734358, lng: 147.501315 },
  { lat: -42.735258, lng: 147.438 },
  { lat: -43.999792, lng: 170.463352 }
];

const options = {
  imagePath: "https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m"
};

function createKey(location) {
  return location.lat + location.lng
};

<ScriptLoaded>
  <GoogleMap id='marker-example' mapContainerStyle={mapContainerStyle} zoom={3} center={center}>
    <MarkerClusterer options={options}>
      {clusterer =>
        locations.map(location => (
          <Marker key={createKey(location)} position={location} clusterer={clusterer} />
        ))
      }
    </MarkerClusterer>
  </GoogleMap>
</ScriptLoaded>
```