CODEWITHSUNDEEP
elm
Mark Karavan
Mark Karavan

Reputation: 2674

HTTP request without request in Elm 0.18

I want to do something very un-functional and make an HTTP request in elm without processing any kind of response. Basically something like this:

testView : Html Msg
testView =
  div [] [
    button [onClick TestAction] [text "Test Action"]
  ]

update : Msg -> Model -> ( Model, Cmd Msg )
update msg model =
    case msg of
      ...
        TestAction ->
          ( model, testActionCmd )
      ...

import Http
import HttpBuilder exposing (..)
...
testActionCmd : Cmd Msg
testActionCmd =
  ( "http://localhost:4000/fakeurl" )
    |> get  -- this is a side effect; unrelated to the Msg below
  Cmd.none  -- this is what I want to return

Is there a way to do something like this in Elm?

Upvotes: 0

Views: 119

Answers (1)

Emmanuel Rosa
Emmanuel Rosa

Reputation: 9885

In short, no, you won't be able to do that (not without writing your own effect manager or using ports).

The "problem" is that the Http module allows you to create a Task which you then need to convert into a Cmd to perform the task. But to go from a Task to a Cmd you need to provide a Msg. See http://package.elm-lang.org/packages/elm-lang/core/5.1.1/Task

So what you'll need to do is create one of those Noop messages.

Upvotes: 5

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