Elm Response

Response utilities in Elm Architecture. Like, build responses from tasks, pipe them, map over.

Usage

What's in a response?

type alias Response model action = (model, Effects action)

This package offers alternate ways to construct and transform responses:

• res and taskRes for inline constructs
• withEffects, withTask and withNone for piped (|>) constructs
• mapModel, mapEffects and mapBoth for transformations

Typical usage examples in update function:

update : Action -> Model -> Response Model Action
update action model =
  case action of
  
    Foo bar baz ->
      -- ({ model | foo = foo }, Effects.task (someTask bar))
      taskRes { model | foo = foo } (someTask bar)
      
    Taz ->
      -- ({model | taz = True}, Effects.none)
      { model | taz = True }
        |> withNone
        
    SubAction subAction ->
      -- let (newSub, newSubEffects) = subActionUpdate subAction model.sub
      -- in (\sub -> { model | sub = newSub }) (Effects.map SubAction newSubEffects)
      subActionUpdate subAction model.sub
        |> mapBoth (\sub -> { model | sub = sub }) SubAction