Elm

ELI5 — The Vibe Check

Elm is the language that promises zero runtime exceptions in your frontend code. It's a pure functional language that compiles to JavaScript and has the friendliest compiler errors you've ever seen. It's like Haskell went to customer service school.

Real Talk

A purely functional programming language for building web applications that compiles to JavaScript. Elm features a strong static type system, immutable data, managed side effects via The Elm Architecture (TEA), and famously produces zero runtime exceptions. Its architecture inspired React's Redux.

Show Me The Code

type Msg = Increment | Decrement

update : Msg -> Model -> Model
update msg model =
    case msg of
        Increment -> model + 1
        Decrement -> model - 1

view : Model -> Html Msg
view model =
    div []
        [ button [ onClick Decrement ] [ text "-" ]
        , text (String.fromInt model)
        , button [ onClick Increment ] [ text "+" ]
        ]

When You'll Hear This

"Elm's compiler is so good that if your code compiles, it almost certainly works." / "The Elm Architecture inspired Redux — model, update, view is the pattern everyone copies."