Install a package:

 elm install elm/json

Useful packages:

• elm/json, for json encoding and decoding.
• elm/http, for requests.

• https://github.com/rtfeldman/elm-spa-example
• elm-spa-example-master.zip

We will need two “main” modules. Then compile it like this:

elm make src/Main1.elm src/Main2.elm --output=main.js

After this you can call it like this:

<div id="elm-app1"></div>
<div id="elm-app2"></div>

<script src="main.js"></script>
<script>
  var app = Elm.Main1.init({
    node: document.getElementById("elm-app1")
  });
  var app2 = Elm.Main2.init({
    node: document.getElementById("elm-app2")
  });
</script>