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Date: Sat, 2 Jan 2016 21:42:46 +0100
From: rixed@happyleptic.org
To: Philippe Veber <philippe.veber@gmail.com>
Cc: caml users <caml-list@inria.fr>
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Subject: Re: [Caml-list] js_of_ocaml and <svg>

Indeed TyXML can generate XHTML trees with svg elements.
But how to use that to update the DOM from JS generated by js_of_ocaml?

# echo > toto.ml <<EOF
let svg = Dom_svg.createSvg Dom_html.window##document
EOF
# ocamlfind ocamlc -syntax camlp4o -package "js_of_ocaml js_of_ocaml.syntax" -c toto.ml
Error: This expression has type Dom_html.document Js.t
       but an expression was expected of type Dom_svg.document Js.t
       Type
         Dom_html.document = (... yanked for sanity ...)
       is not compatible with type
         Dom_svg.document = (... yum yum ...)
       The second object type has no method anchors

Apparently that's a known issue of js_of_ocaml:
https://github.com/ocsigen/js_of_ocaml/issues/276

that I don't know how to work around nicely, may be because I have no idea how
js_of_ocaml interacts with tyxml. I guess you are the pveber of that discussion
so probably you can shed some light on this?