** NOTE ** version 2.0.0 works with elm 0.18 only. If you want it to work with elm 0.17, please install version v0.8.2

elm-instant

atom package link - https://atom.io/packages/elm-instant

elm-instant is an atom package inspired by haskell for mac. It provides both a visual REPL to try your elm code as well as a preview pane to immediately see the output of calling functions you have in your elm files.

With elm-instant, you can start typing expressions and immediately see results in the output panel without any glue code. Plus, it works for ui stuff too!

Features

• Immediate feedback
• Quick way for someone new to the language to try it out
• Mix of ui views + normal expressions
• Has around 38 packages built in (the list is below). E.g. Just do import Http and it will work.
• Can load files from the disk and the dependencies will be resolved automatically
• Can try multiple expressions for the same function. i like how clojurescript devcards describes themselves - visual REPL.

elm-instant was inspired by haskell for mac. The primary idea is to have a playground panel where users can type out code expressions and see the result instantaneously without any setup. There is a similar thing currently for elm (elm-lang.org/try) but it has limited functionality and doesn't work without having the ui layer (model, view, update, main etc.).

Setup

npm install elm -g -- in case you don't have elm installed already
apm install elm-instant

Note To test out your views just copy whatever you would assign to main. E.g. if your code has -

main =
  Html.program
    { init = init
    , view = view
    , update = update
    , subscriptions = subscriptions
    }

copy this to the playground -

Html.program
  { init = init
  , view = view
  , update = update
  , subscriptions = subscriptions
  }

To test the UI part of a view without having the whole triplet, use $view -

-- In your code
ball =
  div [] [text "assume it's a ball"]

-- In the playground
$view ball

Dev setup

npm install elm -g -- in case you don't have elm installed already
git clone https://github.com/mukeshsoni/elm-instant
cd elm-instant
npm install
npm run install-elm-packages
apm link

Packages included by default

• elm-lang/animation-frame
• elm-lang/core
• elm-lang/dom
• elm-lang/geolocation
• elm-lang/html
• elm-lang/keyboard
• elm-lang/lazy
• elm-lang/mouse
• elm-lang/navigation
• elm-lang/page-visibility
• elm-lang/svg
• elm-lang/trampoline
• elm-lang/websocket
• elm-lang/window
• evancz/elm-http
• evancz/elm-markdown
• elm-community/undo-redo
• elm-community/easing-functions
• elm-community/elm-lazy-list
• elm-community/elm-linear-algebra
• elm-community/elm-material-icons
• elm-community/elm-webgl
• elm-community/graph
• elm-community/intdict
• elm-community/list-split
• elm-community/html-extra
• elm-community/json-extra
• elm-community/maybe-extra
• elm-community/random-extra
• elm-community/result-extra
• elm-community/string-extra
• elm-community/svg-extra
• elm-community/array-extra
• elm-community/basics-extra
• elm-community/dict-extra

Maintainers

• Mukesh Soni

License

MIT © Mukesh Soni