Last active
August 15, 2019 14:15
-
-
Save dlidstrom/1600ff82de53d0507b6dcbb1b377246a to your computer and use it in GitHub Desktop.
Elm counter sample with flags
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title>Counter App</title> | |
| <script src="app.js"></script> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| <script> | |
| var app = Elm.Main.init({ | |
| node: document.getElementById('app'), | |
| flags: { | |
| counter: 10 | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import Browser | |
| import Html exposing (Html, button, div, text) | |
| import Html.Events exposing (onClick) | |
| type alias Flags = | |
| { counter : Int } | |
| type Msg = Increment | Decrement | |
| type Model = Model Int | |
| init : Flags -> (Model, Cmd Msg) | |
| init flags = | |
| (Model flags.counter, Cmd.none) | |
| update : Msg -> Model -> (Model, Cmd Msg) | |
| update msg (Model counter) = | |
| case msg of | |
| Increment -> (Model (counter + 1), Cmd.none) | |
| Decrement -> (Model (counter - 1), Cmd.none) | |
| view : Model -> Html Msg | |
| view (Model counter) = | |
| div | |
| [] | |
| [ button [ onClick Decrement ] [ text "-" ] | |
| , div [] [ text (String.fromInt counter) ] | |
| , button [ onClick Increment ] [ text "+" ] ] | |
| main = | |
| Browser.element | |
| { init = init | |
| , update = update | |
| , subscriptions = \_ -> Sub.none | |
| , view = view } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment