@react-google-maps/api/src/components/heatmap/HeatmapLayer.md

React.js Google Maps API integration

# HeatmapLayer example

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

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

const center = {
  lat: 37.774546,
  lng: -122.433523
}

const onLoad = heatmapLayer => {
  console.log('HeatmapLayer onLoad heatmapLayer: ', heatmapLayer)
}

const onUnmount = heatmapLayer => {
  console.log('HeatmapLayer onUnmount heatmapLayer: ', heatmapLayer)
}

<ScriptLoaded>
  {() =>
  <GoogleMap
    // optional
    id="heatmap-layer-example"
    // required to set height and width either through mapContainerClassName, either through mapContainerStyle prop
    mapContainerStyle={mapContainerStyle}
    // required
    zoom={13}
    // required
    center={center}
  >
    <HeatmapLayer
      // optional
      onLoad={onLoad}
      // optional
      onUnmount={onUnmount}
      // required
      data={[
  new google.maps.LatLng(37.782, -122.447),
  new google.maps.LatLng(37.782, -122.445),
  new google.maps.LatLng(37.782, -122.443),
  new google.maps.LatLng(37.782, -122.441),
  new google.maps.LatLng(37.782, -122.439),
  new google.maps.LatLng(37.782, -122.437),
  new google.maps.LatLng(37.782, -122.435),
  new google.maps.LatLng(37.785, -122.447),
  new google.maps.LatLng(37.785, -122.445),
  new google.maps.LatLng(37.785, -122.443),
  new google.maps.LatLng(37.785, -122.441),
  new google.maps.LatLng(37.785, -122.439),
  new google.maps.LatLng(37.785, -122.437),
  new google.maps.LatLng(37.785, -122.435)
]}
    />
  </GoogleMap>
}
  </ScriptLoaded>
```