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Example Elm program that gets grants from the GitHub API on the click of a button
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| { | |
| "version": "1.0.0", | |
| "summary": "Tell the world about your project!", | |
| "repository": "https://github.com/user/project.git", | |
| "license": "BSD3", | |
| "source-directories": [ | |
| "." | |
| ], | |
| "exposed-modules": [], | |
| "dependencies": { | |
| "elm-lang/core": "5.1.1 <= v < 5.1.1", | |
| "elm-lang/html": "2.0.0 <= v < 2.0.0", | |
| "elm-lang/http": "1.0.0 <= v < 1.0.0" | |
| }, | |
| "elm-version": "0.18.0 <= v < 0.19.0" | |
| } |
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| <html> | |
| <head> | |
| <style> | |
| html { | |
| background: #F7F7F7; | |
| color: red; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var app = Elm.Main.fullscreen() | |
| </script> | |
| </body> | |
| </html> |
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| module Main exposing (..) | |
| import Html exposing (Html, text) | |
| import Html.Events exposing (onClick) | |
| import Json.Decode exposing (..) | |
| import Http | |
| main = | |
| Html.program { init = init, subscriptions = subscriptions, view = view, update = update } | |
| type alias Model = | |
| List Int | |
| init : ( Model, Cmd Msg ) | |
| init = | |
| ( [], Cmd.none ) | |
| type Msg | |
| = Click | |
| | GrantsArrived (Result Http.Error (List Int)) | |
| update : Msg -> Model -> ( Model, Cmd Msg ) | |
| update msg model = | |
| case msg of | |
| Click -> | |
| ( model, getGrants ) | |
| GrantsArrived (Ok grants) -> | |
| ( grants, Cmd.none ) | |
| GrantsArrived (Err _) -> | |
| ( model, Cmd.none ) | |
| getGrants : Cmd Msg | |
| getGrants = | |
| let | |
| url = | |
| "https://api.github.com/applications/grants" | |
| req = | |
| Http.request | |
| { method = "GET" | |
| , headers = [ Http.header "Authorization" "Basic ***" ] | |
| , url = url | |
| , body = Http.emptyBody | |
| , expect = Http.expectJson decodeGrants | |
| , timeout = Nothing | |
| , withCredentials = False | |
| } | |
| in | |
| Http.send GrantsArrived req | |
| decodeGrants : Decoder (List Int) | |
| decodeGrants = | |
| list (field "id" int) | |
| view : Model -> Html Msg | |
| view model = | |
| Html.div [] | |
| [ Html.button [ onClick Click ] | |
| [ text "Hello, World!" | |
| ] | |
| , text (String.join " " (List.map toString model)) | |
| ] | |
| subscriptions : Model -> Sub Msg | |
| subscriptions model = | |
| Sub.none |
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