diff --git a/.gitignore b/.gitignore
index a5cc7d6..2fb26d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ input.txt
greek.csv
node_modules
target
+_build
diff --git a/ocaml/README.md b/ocaml/README.md
new file mode 100644
index 0000000..db6493e
--- /dev/null
+++ b/ocaml/README.md
@@ -0,0 +1,3 @@
+_Climbing on the camel's back._ 🐫
+
+Experiments with OCaml, inspired by [Bobkonf](https://bobkonf.de) 2026.
diff --git a/ocaml/dune b/ocaml/dune
new file mode 100644
index 0000000..09870ad
--- /dev/null
+++ b/ocaml/dune
@@ -0,0 +1,5 @@
+(executable
+ (name main)
+ (modes js)
+ (libraries js_of_ocaml)
+ (preprocess (pps js_of_ocaml-ppx)))
diff --git a/ocaml/dune-project b/ocaml/dune-project
new file mode 100644
index 0000000..0f0bb91
--- /dev/null
+++ b/ocaml/dune-project
@@ -0,0 +1,2 @@
+(lang dune 3.10)
+(name ocaml_js_demo)
diff --git a/ocaml/flake.lock b/ocaml/flake.lock
new file mode 100644
index 0000000..88ab73f
--- /dev/null
+++ b/ocaml/flake.lock
@@ -0,0 +1,27 @@
+{
+ "nodes": {
+ "nixpkgs": {
+ "locked": {
+ "lastModified": 1773282481,
+ "narHash": "sha256-b/GV2ysM8mKHhinse2wz+uP37epUrSE+sAKXy/xvBY4=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "fe416aaedd397cacb33a610b33d60ff2b431b127",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixos-unstable",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "root": {
+ "inputs": {
+ "nixpkgs": "nixpkgs"
+ }
+ }
+ },
+ "root": "root",
+ "version": 7
+}
diff --git a/ocaml/flake.nix b/ocaml/flake.nix
new file mode 100644
index 0000000..cbae36a
--- /dev/null
+++ b/ocaml/flake.nix
@@ -0,0 +1,73 @@
+{
+ description = "OCaml -> JavaScript demo using js_of_ocaml";
+
+ inputs = {
+ nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+ };
+
+ outputs =
+ { self, nixpkgs }:
+ let
+ system = "x86_64-linux";
+ pkgs = import nixpkgs { inherit system; };
+ in
+ {
+ devShells.${system}.default = pkgs.mkShell {
+ packages = with pkgs; [
+ ocaml
+ dune_3
+ ocamlPackages.js_of_ocaml
+ ocamlPackages.js_of_ocaml-compiler
+ nodejs
+ tmux
+ ocamlPackages.ocaml-lsp
+ ocamlPackages.ocamlformat
+ (pkgs.writeShellApplication {
+ name = "dev";
+ runtimeInputs = [ dune nodejs tmux ];
+ text = ''
+ SESSION=ocaml-js
+
+ tmux new-session -d -s "$SESSION"
+
+ tmux new-window -t "$SESSION" -n build
+ tmux send-keys -t "$SESSION:0" "dune build main.bc.js --watch" C-m
+
+ tmux new-window -t "$SESSION" -n server
+ tmux send-keys -t "$SESSION:1" "npx live-server result" C-m
+
+ tmux attach -t "$SESSION"
+ '';
+ })
+ ];
+ shellHook = ''
+ echo "Run 'dev' to start tmux dev environment."
+ '';
+ };
+
+ packages.${system}.default = pkgs.stdenv.mkDerivation {
+ pname = "ocaml-js-demo";
+ version = "0.1";
+
+ src = ./.;
+
+ nativeBuildInputs = with pkgs; [
+ ocaml
+ dune_3
+ ocamlPackages.js_of_ocaml
+ ocamlPackages.js_of_ocaml-compiler
+ ocamlPackages.js_of_ocaml-ppx
+ ];
+
+ buildPhase = ''
+ dune build main.bc.js
+ '';
+
+ installPhase = ''
+ mkdir -p $out
+ cp _build/default/main.bc.js $out/
+ cp index.html $out/
+ '';
+ };
+ };
+}
diff --git a/ocaml/index.html b/ocaml/index.html
new file mode 100644
index 0000000..aa90baa
--- /dev/null
+++ b/ocaml/index.html
@@ -0,0 +1,15 @@
+
+
+
+
+ OCaml DOM demo
+
+
+
+OCaml DOM Demo
+
+
+
+
+
+
diff --git a/ocaml/main.ml b/ocaml/main.ml
new file mode 100644
index 0000000..f739e7a
--- /dev/null
+++ b/ocaml/main.ml
@@ -0,0 +1,23 @@
+open Js_of_ocaml
+(* open Js_of_ocaml.Dom_html *)
+
+let document = Dom_html.document
+
+let by_id id =
+ Js.Opt.get
+ (document##getElementById (Js.string id))
+ (fun () -> failwith ("Missing element: " ^ id))
+
+let () =
+ let button = by_id "btn" in
+ let output = by_id "output" in
+
+ let clicks = ref 0 in
+
+ button##.onclick :=
+ Dom_html.handler (fun _ ->
+ incr clicks;
+ output##.textContent :=
+ Js.some (Js.string ("Clicked " ^ string_of_int !clicks ^ " times"));
+ Js._false
+ )