diff --git a/src/layer.ml b/src/layer.ml
index b1e8977..beef402 100644
--- a/src/layer.ml
+++ b/src/layer.ml
@@ -6,6 +6,12 @@ type _ t =
   | Marker : Jv.t -> [> `Marker ] t
   | Tile : Jv.t -> [> `Tile ] t
 
+type _ sub =
+  | Basic : [> `Basic ] sub
+  | Geojson : [> `Geojson ] sub
+  | Marker : [> `Marker ] sub
+  | Tile : [> `Tile ] sub
+
 (** Basic layers *)
 
 let add_to : type kind. Map.t -> kind t -> unit =
@@ -25,10 +31,10 @@ let remove_from : type kind. Map.t -> kind t -> unit =
     let (_ : Jv.t) = Jv.call l "removeFrom" [| Map.to_jv map |] in
     ()
 
-let bind_popup : type kind. Brr.El.t -> kind t -> unit =
- fun el -> function
+let bind_popup : type kind. Brr.El.t -> ?options:Jv.t -> kind t -> unit =
+ fun el ?(options = Jv.null) -> function
   | Basic l | Geojson l | Marker l | Tile l ->
-    let (_ : Jv.t) = Jv.call l "bindPopup" [| Brr.El.to_jv el |] in
+    let (_ : Jv.t) = Jv.call l "bindPopup" [| Brr.El.to_jv el; options |] in
     ()
 
 let unbind_popup : type kind. kind t -> unit = function
@@ -53,6 +59,23 @@ let get_popup : type kind. kind t -> Popup.t = function
 let to_jv : type kind. kind t -> Jv.t = function
   | Basic l | Geojson l | Marker l | Tile l -> l
 
+let of_jv : type kind. kind sub -> Jv.t -> kind t =
+ fun tag l ->
+  match tag with
+  | Basic -> Basic l
+  | Geojson -> Geojson l
+  | Marker -> Marker l
+  | Tile -> Tile l
+
+let on : type kind. kind Event.sub -> (kind Event.t -> 'b) -> 'c t -> unit =
+ fun event handler layer ->
+  let name = Event.sub_to_string event in
+  let handler v = handler @@ Event.of_jv event v in
+  let (_ : Jv.t) =
+    Jv.call (to_jv layer) "on" [| Jv.of_string name; Jv.repr handler |]
+  in
+  ()
+
 (** Geojson layers *)
 
 let create_geojson : ?options:Jv.t -> Jv.t -> [ `Geojson ] t =
diff --git a/src/layer.mli b/src/layer.mli
index d049182..309d1f5 100644
--- a/src/layer.mli
+++ b/src/layer.mli
@@ -6,6 +6,12 @@ type _ t =
   | Marker : Jv.t -> [> `Marker ] t
   | Tile : Jv.t -> [> `Tile ] t
 
+type _ sub =
+  | Basic : [> `Basic ] sub
+  | Geojson : [> `Geojson ] sub
+  | Marker : [> `Marker ] sub
+  | Tile : [> `Tile ] sub
+
 (** Basic layers *)
 
 (** [add_to map layer] adds [layer] to [map] *)
@@ -18,7 +24,7 @@ val remove : _ t -> unit
 val remove_from : Map.t -> _ t -> unit
 
 (** [bind_popup popup layer] binds [popup] to [layer] *)
-val bind_popup : Brr.El.t -> _ t -> unit
+val bind_popup : Brr.El.t -> ?options:Jv.t -> _ t -> unit
 
 (** [unbind_popup layer] unbinds the popup bound to [layer] *)
 val unbind_popup : _ t -> unit
@@ -35,6 +41,13 @@ val get_popup : _ t -> Popup.t
 (** [to_jv o] is [o] as a {!Jv.t} *)
 val to_jv : _ t -> Jv.t
 
+(** [of_jv tag o] is [o] as a [tag t] *)
+val of_jv : 'a sub -> Jv.t -> 'a t
+
+(** [on event handler layer] add an event listener on [layer] for event [event]
+    with handler [handler] *)
+val on : 'a Event.sub -> ('a Event.t -> 'b) -> 'c t -> unit
+
 (** Geojson layers *)
 
 (** [create_geojson geojson] is a new geojson layer *)