Elm

Introduction

While we recommend using IHP without any frontend frameworks, it may sometimes be useful to have a frontend framework for highly interactive parts of a webapp.

We think that Elm can be a great fit for this, and have therefor made getting started with Elm in a new ihp app as simple as possible

Credits to Lars Lillo Ulvestad, who wrote a series of excellent articles about the setup, which our implementation is based off of.

Getting Started with IHP and Elm

It’s as simple as passing the --elm option to ihp-new:

ihp-new --elm my-ihp-elm-project

This will generate a ready-to-go IHP app with Elm set up. To check that everything is working as expected, simply run ./start as usual. The welcome page should say both “It’s working” and “Elm is working!”, which tells you that the setup works as expected.

Troubleshooting

If you don’t see “Elm is working!” right away, try refreshing after a couple of seconds - the first time the Elm code might take just those few seconds more to compile.

Where everything is

You can find all Elm related code in ./elm. Use index.js to instantiate your Elm widgets. The file also loads Main.elm, which can be your entry-point into your Elm app.

Where to go from here

We recommend reading Lars’ series of blog articles to see how to take this setup further and when to use it. The setup you currently get is mostly equivalent to part 1 of his series.