Hi there,
I'm pretty new to elm and I'm facing an issue I can't resolve by myself...
I would like to display a text entered in a textbox by clicking on a
button. But elm detects an error with the definition of view. It says :
---------
Detected errors in 1 module.
-- TYPE MISMATCH
---------------------------------------------------------------
The type annotation for `view` does not match its definition.
26| view: String -> Html a
^^^^^^^^^^^^^^^^
The type annotation is saying:
String -> Html a
But I am inferring that the definition has this type:
String -> Html (String -> Msg)
Hint: A type annotation is too generic. You can probably just switch to the
type
I inferred. These issues can be subtle though, so read more about it.
<https://github.com/elm-lang/elm-compiler/blob/0.17.0/hints/type-annotations.md>
-----------
I really don't know what to do. If you can please explain how to resolve
this, because I can't find anything that helps... Thanks for your time!
Here is the code I wrote in http://elm-lang.org/try :
import Html exposing (..)
import Html.App as App
import Html.Attributes exposing (..)
import Html.Events exposing (..)
main =
App.beginnerProgram {
model = init "",
update = update,
view = view
}
init : String -> String
init str =
str
type Msg = UpdateModel String
update: Msg -> String -> String
update action model =
case action of
UpdateModel newModel ->
newModel
view: String -> Html a
view model =
div[]
[
input[type' "text", placeholder "Please enter a name..."][]
,button [onClick UpdateModel][text "Ajouter"]
,div[][text model]
]
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