How to group labels?

Question

JavaScript

how to group markers on the map? I am using react-google-maps
map code

const Map = compose(withScriptjs, withGoogleMap)((props) =>
  <GoogleMap
    defaultZoom={14}
    center={props.center}
  >
    {props.places.map(row => {
      return (
        <MarkerElement
          row={ row }
          placeToShow={ props.placeToShow }
          isOpen={ props.isOpen }
          onToggleOpen={ (placeToShow, isOpen) => props.onToggleOpen(placeToShow, isOpen) }
          places={ props.places }
          key={ row.id }
        />
      )
    })}
  </GoogleMap>

Answer 1

MarkerClusterer is here to help.
UPD. https://codesandbox.io/s/for-httpsqnahabrcomq56380...