It is easy to install and use as it works with an existing installation of OCaml, with no need to recompile any library.
It comes with bindings for a large part of the browser APIs.
According to our benchmarks, the generated programs runs typically faster than with the OCaml bytecode interpreter.
We believe this compiler will prove much easier to maintain than a retargeted OCaml compiler, as the bytecode provides a very stable API.
Js_of_ocaml is composed of multiple packages:
js_of_ocaml-compiler, the compiler.
js_of_ocaml-ppx, a ppx syntax extension.
js_of_ocaml, the base library.
js_of_ocaml-lwt, lwt support.
js_of_ocaml-tyxml, tyxml support.
See opam file for version constraints.
ocp-indent: needed to support indentation in the toplevel
higlo: needed to support Syntax highlighting in the toplevel
cohttp: needed to build the toplevel webserver
opam install js_of_ocaml js_of_ocaml-compiler js_of_ocaml-ppx
Your program must first be compiled using the OCaml bytecode compiler
js_of_ocaml package. The syntax extension is provided by
ocamlfind ocamlc -package js_of_ocaml -package js_of_ocaml-ppx -linkpkg -o cubes.byte cubes.ml
Then, run the
Most of the OCaml standard library is supported. However,
Most of the Sys module is not supported.
Extra libraries distributed with OCaml (such as Thread) are not supported in general. However,
Bigarray: bigarrays are supported using Typed Arrays
Graphics: partially supported using canvas (see js_of_ocaml-lwt.graphics)
Unix: time related functions are supported
Tail call is not optimized in general. However, mutually recursive functions are optimized:
self recursive functions (when the tail calls are the function itself) are compiled using a loop.
trampolines are used otherwise. More about tail call optimization.
Effect handlers are supported with the
marshalling of floats is not supported (unmarshalling works);
the polymorphic hash function will not give the same results on datastructures containing floats;
these functions may be more prone to stack overflow.
|int||number (32bit int)|
|int32||number (32bit int)|
|nativeint||number (32bit int)|
|string||string or object (MlBytes)|
|"immediate" (e.g. true, false, None, ())||number (32bit int)|
|"block"||array with tag as first element (e.g.
|array||block with tag 0 (e.g.
|tuple||block with tag 0 (e.g.
|constructor with arguments||block (e.g.
|exception and extensible variant||block or immediate|
OCaml 4.04.2 includes Base, Core_kernel, Async_kernel, Async_js
OCaml 4.04.0+BER see http://okmij.org/ftp/ML/MetaOCaml.html
OCaml 4.05.0 includes Base, Core_kernel, Async_kernel, Async_js
OCaml 4.06.0 includes Base, Core_kernel, Async_kernel, Async_js
Contents of the distribution
|LICENSE||license and copyright notice|
|ppx/||ppx syntax extensions|
|toplevel/||web-based OCaml toplevel|