Trivial example to calculate route distances from a fixed point to location(s) specified as user input, using HERE Location Services.

## hls-distances.html
<!DOCTYPE html>

<html>

<head>
  <meta charset="utf-8" />
  <script src="http://js.api.here.com/v3/3.0/mapsjs-core.js" type="text/javascript" charset="utf-8"></script>
  <script src="http://js.api.here.com/v3/3.0/mapsjs-service.js" type="text/javascript" charset="utf-8"></script>
</head>

<body>
  <form onsubmit="geocodeAndRoute(); return false">
    <input type="text" id="address"><input type="submit">
  </form>

  <table>
    <thead>
      <tr>
        <th>Location</th>
        <th>Distance to drive</th>
      </tr>
    </thead>
    <tbody id="resultsTable"></tbody>
  </table>

  <script>
    const sourceLocation = '52.5214,13.41555'

    const platform = new H.service.Platform({
      'app_id': 'YOUR_APP_ID_GOES_HERE',
      'app_code': 'YOUR_APP_CODE_GOES_HERE'
    })

    const geocoder = platform.getGeocodingService()
    const router = platform.getRoutingService()

    const onGeocodeResult = (result) => {
      const table = document.getElementById('resultsTable')
      table.innerHTML = ''

      if (result.Response.View.length) {
        const locations = result.Response.View[0].Result
        for (loc of locations) {
          const row = table.insertRow(-1)

          row.insertCell(-1).innerHTML = loc.Location.Address.Label
          const { Latitude, Longitude } = loc.Location.DisplayPosition

          const routeCell = row.insertCell(-1)
          const routingParameters = {
            'mode': 'fastest;car;traffic:disabled',
            'waypoint0': 'geo!' + sourceLocation,
            'waypoint1': 'geo!' + Latitude + ',' + Longitude,
            'representation': 'overview'
          }

          // calculate each route separately (alternatively, could use the Matrix Routing API)
          router.calculateRoute(routingParameters, routeResult => {
            if (routeResult.response) {
              const distKm = routeResult.response.route[0].summary.distance / 1000
              routeCell.innerHTML = distKm
            } else { // no route found
              routeCell.innerHTML = 'unknown'
            }
          }, (error) => alert(error.message))
        }
      } else {
        // no matching location found
      }
    }

    function geocodeAndRoute() {
      const address = document.getElementById('address').value
      const geoparams = { searchText: address }
      geocoder.geocode(geoparams, onGeocodeResult, (error) => alert(error.message))
    }

  </script>
</body>

</html>