You mean ports and flags? It's described right in the tutorial : https://guide.elm-lang.org/interop/ports.html https://guide.elm-lang.org/interop/ports.html. I

You mean ports and flags? It's described right in the tutorial : https://guide.elm-lang.org/interop/ports.html https://guide.elm-lang.org/interop/ports.html. I wouldn't call it not possible. It is necessary to have the cool stuff of Elm, unfortunately (or not). It's not rocket science tough, and it allows for clean interfaces. I wrote about it just a couple ago ago : https://lengrand.fr/a-short-introduction-to-ports-and-flags-in-elm/ https://lengrand.fr/a-short-introduction-to-ports-and-flags-...