object
method clearWatch : Geolocation.watchId -> unit Js.meth
method getCurrentPosition :
(Geolocation.position Js.t -> unit) Js.callback ->
(Geolocation.positionError Js.t -> unit) Js.callback ->
Geolocation.positionOptions Js.t -> unit Js.meth
method watchPosition :
(Geolocation.position Js.t -> unit) Js.callback ->
(Geolocation.positionError Js.t -> unit) Js.callback ->
Geolocation.positionOptions Js.t -> Geolocation.watchId Js.meth
end