├── .gitignore
├── README.md
├── elm-package.json
├── examples
    ├── article
    │   ├── .DS_Store
    │   ├── dist
    │   │   ├── favicon.ico
    │   │   ├── index.html
    │   │   ├── js
    │   │   │   └── main.2ee6e429.js
    │   │   └── static
    │   │   │   └── media
    │   │   │       └── panda.12f77371.jpg
    │   ├── elm-package.json
    │   └── src
    │   │   ├── .DS_Store
    │   │   ├── Main.elm
    │   │   ├── Ports.elm
    │   │   ├── favicon.ico
    │   │   ├── index.html
    │   │   ├── index.js
    │   │   ├── main.css
    │   │   └── panda.jpg
    └── document
    │   ├── .DS_Store
    │   ├── dist
    │       ├── favicon.ico
    │       ├── index.html
    │       ├── js
    │       │   └── main.eab5c38b.js
    │       └── static
    │       │   └── media
    │       │       └── panda.12f77371.jpg
    │   ├── elm-package.json
    │   └── src
    │       ├── .DS_Store
    │       ├── Main.elm
    │       ├── Ports.elm
    │       ├── favicon.ico
    │       ├── index.html
    │       ├── index.js
    │       ├── main.css
    │       └── panda.jpg
└── src
    └── ScrollProgress.elm


/.gitignore:
--------------------------------------------------------------------------------
1 | elm-stuff
2 | elm.js
3 | examples
4 | .DS_Store


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/README.md:
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  1 | # elm-scroll-progress
  2 | 
  3 | Add a scroll progress indicator and track the `scrollTop` position of your app or a specific element.
  4 | 
  5 | ```shell
  6 | elm package install chrisbuttery/elm-scroll-progress
  7 | ```
  8 | 
  9 | ### Examples
 10 | You can scope to a specific element (e.g. and article) or to the document.
 11 | 
 12 | [Article](http://chrisbuttery.github.io/elm-scroll-progress/examples/article/dist/index.html) | [Document](http://chrisbuttery.github.io/elm-scroll-progress/examples/document/dist/index.html)
 13 | 
 14 | ## Usage
 15 | 
 16 | 1. Import the module.  
 17 | 2. Create a new parent Msg type referencing the `ScrollProgress` `Msg`.  
 18 | 3. Subscribe to an incoming port, ensuring incoming data is passed back to `ScrollProgress.Progress`.  
 19 | 4. Cater for the ProgressMsg in your `update` function.  
 20 | 5. Map emitted messages from `ScrollProgress.view` to the type teh parent view expects (Msg).
 21 | 
 22 | 
 23 | ```elm
 24 | module Main exposing (..)
 25 | import ScrollProgress exposing (..)
 26 | 
 27 | -- MESSAGES
 28 | 
 29 | type Msg
 30 |     = ProgressMsg ScrollProgress.Msg
 31 | 
 32 | -- SUBSCRIPTIONS
 33 | 
 34 | subscriptions : Model -> Sub Msg
 35 | subscriptions model =
 36 |     Ports.onScroll (ProgressMsg << ScrollProgress.Progress)
 37 | 
 38 | -- UPDATE
 39 | 
 40 | update : Msg -> AppModel -> ( AppModel, Cmd Msg )
 41 | update message model =
 42 |     case message of
 43 |         ProgressMsg subMsg ->
 44 |             let
 45 |                 ( updatedProgessModel, progressCmd ) =
 46 |                     ScrollProgress.update subMsg model.progressModel
 47 |             in
 48 |                 ( { model | progressModel = updatedProgessModel }, Cmd.map ProgressMsg progressCmd )
 49 | 
 50 | --VIEW
 51 | 
 52 | view : AppModel -> Html Msg
 53 | view model =
 54 |     Html.div []
 55 |         [ Html.App.map ProgressMsg (ScrollProgress.view model.progressModel)
 56 |         , Html.h1 [] [ text "Read this " ]
 57 |         , Html.div [] [ text "Some article..." ]
 58 |         ]
 59 | ```
 60 | 
 61 | Define an incoming port in your `Ports.elm` so JavaScript can pass in scrolling attributes.
 62 | 
 63 | ```elm
 64 | port module Ports exposing (..)
 65 | import ProgressBar exposing (ScrollAttributes)
 66 | 
 67 | port onScroll : (ScrollAttributes -> msg) -> Sub msg
 68 | ```
 69 | 
 70 | In your JavaScript, add an eventListener to listen for the "scroll" event on the `window`.  
 71 | You can choose to target the document or a specifc element's `targetScrollHeight`.
 72 | 
 73 | ```js
 74 | var app = Elm.Main.embed(root);
 75 | 
 76 | var target = document.querySelector('.some-article');
 77 | // or target the full page height with:
 78 | // target = document.documentElement;
 79 | 
 80 | window.addEventListener('scroll', function() {
 81 |   app.ports.onScroll.send({
 82 |     scrollTop: document.documentElement.scrollTop || document.body.scrollTop,
 83 |     targetScrollHeight: target.scrollHeight,
 84 |     clientHeight: document.documentElement.clientHeight
 85 |   });
 86 | });
 87 | ```
 88 | Note: For this to work in Firefox, we need to check for `document.documentElement.scrollTop` otherwise fallback to `document.body.scrollTop`.
 89 | 
 90 | ## Overrides
 91 | 
 92 | All types for defining colors are `Maybe String`.  
 93 | By default, the color of the progress scale is defined as `Just #1684f6` however these `String` values can be whatever CSS colors you wish e.g: `"#336699"`, `"honeydew"`, `"rgba(0,0,0,0.5)"`, etc.
 94 | 
 95 | You can choose to overide this color or include a linear gradient.
 96 | 
 97 | To override the color of the element, define a new model for the Child inside of the Parent.
 98 | 
 99 | ```elm
100 | module Main exposing (..)
101 | import ScrollProgress exposing (..)
102 | 
103 | type alias AppModel =
104 |     { progressModel : ScrollProgress.Model
105 |     }
106 | 
107 | newChildModel : ScrollProgress.Model
108 | newChildModel =
109 |     { progress = 0
110 |     , color = Just "hotpink"
111 |     , from = Nothing
112 |     , to = Nothing
113 |     }
114 | 
115 | initialModel : AppModel
116 | initialModel =
117 |     { progressModel = newChildModel }
118 | ```
119 | 
120 | To replace a flat color for a linear gradient, populate the `from` and `to` properties.
121 | 
122 | ```elm
123 | newChildModel : ScrollProgress.Model
124 | newChildModel =
125 |     { progress = 0
126 |     , color = Nothing
127 |     , from = Just "lightseagreen"
128 |     , to = Just "lightsalmon"
129 |     }
130 | ```
131 | 
132 | # Building examples
133 | 
134 | Install [Create Elm App](https://github.com/halfzebra/create-elm-app) and run `elm-app build` or `elm-app start` inside of `examples/article` & `examples/body`.
135 | 
136 | Thanks goes to [Michael Troy](https://github.com/michaeltroy) for creating the examples.
137 | 
138 | > [chrisbuttery.com](http://chrisbuttery.com) &nbsp;&middot;&nbsp;
139 | > GitHub [@chrisbuttery](https://github.com/chrisbuttery) &nbsp;&middot;&nbsp;
140 | > Twitter [@buttahz](https://twitter.com/buttahz) &nbsp;&middot;&nbsp;
141 | > elm-lang slack [@butters](http://elmlang.herokuapp.com/)
142 | 


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/elm-package.json:
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 1 | {
 2 |     "version": "1.0.3",
 3 |     "summary": "A scroll progress indicator",
 4 |     "repository": "https://github.com/chrisbuttery/elm-scroll-progress.git",
 5 |     "license": "BSD3",
 6 |     "source-directories": [
 7 |         "src"
 8 |     ],
 9 |     "exposed-modules": [
10 |         "ScrollProgress"
11 |     ],
12 |     "dependencies": {
13 |         "elm-lang/core": "4.0.5 <= v < 5.0.0",
14 |         "elm-lang/html": "1.1.0 <= v < 2.0.0"
15 |     },
16 |     "elm-version": "0.17.1 <= v < 0.18.0"
17 | }
18 | 


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/examples/article/.DS_Store:
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https://raw.githubusercontent.com/chrisbuttery/elm-scroll-progress/3e4dd2c1812812f878ba4bf3435b2380b43c6c1c/examples/article/.DS_Store


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/examples/article/dist/favicon.ico:
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https://raw.githubusercontent.com/chrisbuttery/elm-scroll-progress/3e4dd2c1812812f878ba4bf3435b2380b43c6c1c/examples/article/dist/favicon.ico


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/examples/article/dist/index.html:
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1 | <!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="x-ua-compatible" content="ie=edge"><link href="https://fonts.googleapis.com/css?family=Libre+Baskerville|Open+Sans" rel="stylesheet"><title>Elm App</title><link rel="shortcut icon" href="favicon.ico"></head><body><div id="root"></div><div class="article"><h1>The Happy Panda</h1><div class="panda"></div><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p><p>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p><p>Story written by The Happy Panda</p></div><script type="text/javascript" src="js/main.2ee6e429.js"></script></body></html>


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/examples/article/dist/static/media/panda.12f77371.jpg:
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/examples/article/elm-package.json:
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 1 | {
 2 |     "version": "1.0.0",
 3 |     "summary": "helpful summary of your project, less than 80 characters",
 4 |     "repository": "https://github.com/user/project.git",
 5 |     "license": "BSD3",
 6 |     "source-directories": [
 7 |         "src",
 8 |         "../../src/"
 9 |     ],
10 |     "exposed-modules": [],
11 |     "dependencies": {
12 |         "elm-lang/core": "4.0.5 <= v < 5.0.0",
13 |         "elm-lang/html": "1.1.0 <= v < 2.0.0"
14 |     },
15 |     "elm-version": "0.17.1 <= v < 0.18.0"
16 | }
17 | 


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/examples/article/src/.DS_Store:
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/examples/article/src/Main.elm:
--------------------------------------------------------------------------------
 1 | module Main exposing (..)
 2 | 
 3 | import Html exposing (text, Html, div)
 4 | import Html.App
 5 | import ScrollProgress exposing (..)
 6 | import Ports
 7 | 
 8 | 
 9 | -- MODEL
10 | 
11 | 
12 | type alias AppModel =
13 |     { progressModel : ScrollProgress.Model
14 |     }
15 | 
16 | 
17 | childModel : ScrollProgress.Model
18 | childModel =
19 |     { progress = 0
20 |     , color = Nothing
21 |     , to = Just "lightsalmon"
22 |     , from = Just "lightseagreen"
23 |     }
24 | 
25 | 
26 | initialModel : AppModel
27 | initialModel =
28 |     { progressModel = childModel }
29 | 
30 | 
31 | init : ( AppModel, Cmd Msg )
32 | init =
33 |     ( initialModel, Cmd.none )
34 | 
35 | 
36 | 
37 | -- MESSAGES
38 | 
39 | 
40 | type Msg
41 |     = ProgressMsg ScrollProgress.Msg
42 | 
43 | 
44 | 
45 | -- VIEW
46 | 
47 | 
48 | view : AppModel -> Html Msg
49 | view model =
50 |     Html.div []
51 |         [ Html.App.map ProgressMsg (ScrollProgress.view model.progressModel) ]
52 | 
53 | 
54 | 
55 | -- UPDATE
56 | 
57 | 
58 | update : Msg -> AppModel -> ( AppModel, Cmd Msg )
59 | update message model =
60 |     case message of
61 |         ProgressMsg subMsg ->
62 |             let
63 |                 ( updatedProgessModel, progressCmd ) =
64 |                     ScrollProgress.update subMsg model.progressModel
65 |             in
66 |                 ( { model | progressModel = updatedProgessModel }, Cmd.map ProgressMsg progressCmd )
67 | 
68 | 
69 | 
70 | -- SUBSCIPTIONS
71 | 
72 | 
73 | subscriptions : AppModel -> Sub Msg
74 | subscriptions model =
75 |     Ports.onScroll (ProgressMsg << ScrollProgress.Progress)
76 | 
77 | 
78 | 
79 | -- APP
80 | 
81 | 
82 | main : Program Never
83 | main =
84 |     Html.App.program
85 |         { init = init
86 |         , view = view
87 |         , update = update
88 |         , subscriptions = subscriptions
89 |         }
90 | 


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/examples/article/src/Ports.elm:
--------------------------------------------------------------------------------
 1 | port module Ports exposing (..)
 2 | 
 3 | import ScrollProgress exposing (ScrollAttributes)
 4 | 
 5 | 
 6 | -- PORTS
 7 | 
 8 | 
 9 | port onScroll : (ScrollAttributes -> msg) -> Sub msg
10 | 


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/examples/article/src/favicon.ico:
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/examples/article/src/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta http-equiv="x-ua-compatible" content="ie=edge">
 6 |     <link href="https://fonts.googleapis.com/css?family=Libre+Baskerville|Open+Sans" rel="stylesheet">
 7 |     <title>Elm App</title>
 8 | </head>
 9 | <body>
10 |     <div id="root"></div>
11 |     <div class="article">
12 |       <h1>The Happy Panda</h1>
13 |       <div class="panda"></div>
14 |       <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
15 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
16 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
17 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
18 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
19 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
20 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
21 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
22 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
23 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
24 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
25 |       </p>
26 |       <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
27 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
28 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
29 |       consequat.</p>
30 |       <p>Duis aute irure dolor in reprehenderit in voluptate velit esse
31 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
32 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
33 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
34 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
35 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
36 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
37 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
38 |       </p>
39 |       <p>Story written by The Happy Panda</p>
40 |     </div>
41 | </body>
42 | </html>
43 | 


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/examples/article/src/index.js:
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 1 | require('./main.css');
 2 | 
 3 | const Elm = require('./Main.elm');
 4 | const root  = document.getElementById('root');
 5 | const app = Elm.Main.embed(root);
 6 | 
 7 | const target = document.querySelector('.article');
 8 | // ... or target the body
 9 | // const target = document.documentElement;
10 | 
11 | window.addEventListener('scroll', function() {
12 |   app.ports.onScroll.send({
13 |     scrollTop: document.documentElement.scrollTop || document.body.scrollTop,
14 |     targetScrollHeight: target.scrollHeight,
15 |     clientHeight: document.documentElement.clientHeight
16 |   });
17 | });


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/examples/article/src/main.css:
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  1 | body {
  2 |   background: #ccc;
  3 |   height: 2000px;
  4 |   margin: 0;
  5 |   position: relative;
  6 | }
  7 | 
  8 | #root {
  9 |   left: 0;
 10 |   position: fixed;
 11 |   top: 0;
 12 |   width: 100%;
 13 |   z-index: 20;
 14 | }
 15 | 
 16 | .scroll-progress {
 17 |   font-size: 12px;
 18 |   font: menu;
 19 |   height: 4px;
 20 | }
 21 | 
 22 | .article {
 23 |   background: white;
 24 |   border-radius: 2px;
 25 |   border-radius: 2px;
 26 |   border: 1px solid #c1c1c1;
 27 |   font: menu;
 28 |   margin: 60px auto;
 29 |   max-width: 800px;
 30 |   padding: 30px;
 31 |   position: relative;
 32 |   width: 80%;
 33 |   z-index: 10;
 34 | }
 35 | 
 36 | .article:after {
 37 |   background: #fff;
 38 |   box-shadow: 0 10px 10px #b2b2b2;
 39 |   content: "";
 40 |   height: 100%;
 41 |   left: 0;
 42 |   position: absolute;
 43 |   top: 0;
 44 |   width: 100%;
 45 |   z-index: -10;
 46 | }
 47 | 
 48 | h1 {
 49 |   color: rgba(0, 0, 0, 0.8);
 50 |   font-family: 'Libre Baskerville', serif;
 51 |   font-size: 3.3em;
 52 |   padding: 30px 0 50px 0;
 53 |   text-align: center;
 54 | }
 55 | 
 56 | p {
 57 |   color: rgba(0, 0, 0, 0.8);
 58 |   font-family: 'Open Sans', sans-serif;
 59 |   font-size: 21px;
 60 |   line-height: 1.58;
 61 |   margin: 0;
 62 |   text-indent: 30px;
 63 | }
 64 | 
 65 | p:first-of-type {
 66 |   text-indent: 0;
 67 | }
 68 | 
 69 | p:first-of-type:first-letter {
 70 |   background-color: #699933;
 71 |   border: 4px solid #577f2a;
 72 |   color: white;
 73 |   float: left;
 74 |   font-family: Georgia;
 75 |   font-size: 60px;
 76 |   line-height: 50px;
 77 |   margin: 10px 30px 10px 10px;
 78 |   padding: 20px;
 79 | }
 80 | 
 81 | p:nth-of-type(2) {
 82 |   border-left: 4px solid rgba(105, 153, 51, 0.15);
 83 |   color: #577f2a;
 84 |   font-family: 'Libre Baskerville', serif;
 85 |   margin: 30px 10px;
 86 |   padding: 0 20px 0 30px;
 87 |   text-indent: 0;
 88 | }
 89 | 
 90 | p:nth-of-type(4) {
 91 |   color: rgb(198, 198, 198);
 92 |   font-family: 'Libre Baskerville';
 93 |   font-size: 15px;
 94 |   margin-top: 20px;
 95 | }
 96 | 
 97 | .panda {
 98 |   background: url('./panda.jpg') no-repeat center;
 99 |   background-size: cover;
100 |   height: 400px;
101 |   margin: 20px 20px 40px 0;
102 |   width: 100%;
103 | }
104 | 


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1 | <!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="x-ua-compatible" content="ie=edge"><link href="https://fonts.googleapis.com/css?family=Libre+Baskerville|Open+Sans" rel="stylesheet"><title>Elm App</title><link rel="shortcut icon" href="favicon.ico"></head><body><div id="root"></div><div class="article"><h1>The Happy Panda</h1><div class="panda"></div><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p><p>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p><p>Story written by The Happy Panda</p></div><script type="text/javascript" src="js/main.eab5c38b.js"></script></body></html>


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f(rr,t,tr,r)}),Xt.style),nr=(Xt.attributeNS,Xt.attribute,Xt.property),or=Xt.map,ar=(Xt.text,Xt.node),ir=(r(function(t,r){return{stopPropagation:t,preventDefault:r}}),ar),ur=(ir("body"),ir("section"),ir("nav"),ir("article"),ir("aside"),ir("h1"),ir("h2"),ir("h3"),ir("h4"),ir("h5"),ir("h6"),ir("header"),ir("footer"),ir("address"),ir("main"),ir("p"),ir("hr"),ir("pre"),ir("blockquote"),ir("ol"),ir("ul"),ir("li"),ir("dl"),ir("dt"),ir("dd"),ir("figure"),ir("figcaption"),ir("div")),cr=(ir("a"),ir("em"),ir("strong"),ir("small"),ir("s"),ir("cite"),ir("q"),ir("dfn"),ir("abbr"),ir("time"),ir("code"),ir("var"),ir("samp"),ir("kbd"),ir("sub"),ir("sup"),ir("i"),ir("b"),ir("u"),ir("mark"),ir("ruby"),ir("rt"),ir("rp"),ir("bdi"),ir("bdo"),ir("span"),ir("br"),ir("wbr"),ir("ins"),ir("del"),ir("img"),ir("iframe"),ir("embed"),ir("object"),ir("param"),ir("video"),ir("audio"),ir("source"),ir("track"),ir("canvas"),ir("svg"),ir("math"),ir("table"),ir("caption"),ir("colgroup"),ir("col"),ir("tbody"),ir("thead"),ir("tfoot"),ir("tr"),ir("td"),ir("th"),ir("form"),ir("fieldset"),ir("legend"),ir("label"),ir("input"),ir("button"),ir("select"),ir("datalist"),ir("optgroup"),ir("option"),ir("textarea"),ir("keygen"),ir("output"),ir("progress"),ir("meter"),ir("details"),ir("summary"),ir("menuitem"),ir("menu"),Zt),lr=function(t){return cr(p.update(t,{init:function(r){return t.init}}))},fr=or,_r=nr,sr=r(function(t,r){return l(_r,t,Wt(r))}),dr=function(t){return l(sr,"className",t)},hr=(r(function(t,r){return l(_r,t,Qt(r))}),er),pr=function(t){var r=R.fromArray([{ctor:"_Tuple2",_0:"transition",_1:"0.1s width"},{ctor:"_Tuple2",_0:"width",_1:l(v["++"],m(t.progress),"%")}]),e=l(w,"",t.to),n=l(w,"",t.from),o=l(w,"",t.color),a=!p.eq(o,"")||p.eq(n,"")||p.eq(e,"")?p.eq(o,"")?R.fromArray([{ctor:"_Tuple2",_0:"background",_1:"red"}]):R.fromArray([{ctor:"_Tuple2",_0:"background",_1:o}]):R.fromArray([{ctor:"_Tuple2",_0:"background",_1:n},{ctor:"_Tuple2",_0:"background",_1:l(v["++"],"linear-gradient( to right, ",l(v["++"],n,l(v["++"],", ",l(v["++"],e," )"))))}]),i=l(P,a,r);return l(ur,R.fromArray([dr("scroll-progress"),hr(i)]),R.fromArray([]))},gr=function(t){var r=b(t.clientHeight),e=b(t.targetScrollHeight),n=b(t.scrollTop),o=y(n/(e-r)*100);return p.cmp(o,100)>0?100:p.cmp(o,0)<0?0:o},vr=r(function(t,r){var 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wr(mr(t))})},Nr={main:lr({init:Tr,view:Br,update:xr,subscriptions:Rr})},Ar={};if(Ar.Main=Ar.Main||{},K.addPublicModule(Ar.Main,"Main","undefined"==typeof Nr?null:Nr),"function"==typeof define&&define.amd)return void define([],function(){return Ar});if("object"==typeof t)return void(t.exports=Ar);var Er=this.Elm;if("undefined"==typeof Er)return void(this.Elm=Ar);for(var Or in Ar){if(Or in Er)throw new Error("There are two Elm modules called `"+Or+"` on this page! 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/examples/document/dist/static/media/panda.12f77371.jpg:
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/examples/document/elm-package.json:
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 1 | {
 2 |     "version": "1.0.0",
 3 |     "summary": "helpful summary of your project, less than 80 characters",
 4 |     "repository": "https://github.com/user/project.git",
 5 |     "license": "BSD3",
 6 |     "source-directories": [
 7 |         "src",
 8 |         "../../src/"
 9 |     ],
10 |     "exposed-modules": [],
11 |     "dependencies": {
12 |         "elm-lang/core": "4.0.5 <= v < 5.0.0",
13 |         "elm-lang/html": "1.1.0 <= v < 2.0.0"
14 |     },
15 |     "elm-version": "0.17.1 <= v < 0.18.0"
16 | }
17 | 


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/examples/document/src/.DS_Store:
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https://raw.githubusercontent.com/chrisbuttery/elm-scroll-progress/3e4dd2c1812812f878ba4bf3435b2380b43c6c1c/examples/document/src/.DS_Store


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/examples/document/src/Main.elm:
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 1 | module Main exposing (..)
 2 | 
 3 | import Html exposing (text, Html, div)
 4 | import Html.App
 5 | import ScrollProgress exposing (..)
 6 | import Ports
 7 | 
 8 | 
 9 | -- MODEL
10 | 
11 | 
12 | type alias AppModel =
13 |     { progressModel : ScrollProgress.Model
14 |     }
15 | 
16 | 
17 | childModel : ScrollProgress.Model
18 | childModel =
19 |     { progress = 0
20 |     , color = Nothing
21 |     , to = Just "lightsalmon"
22 |     , from = Just "lightseagreen"
23 |     }
24 | 
25 | 
26 | initialModel : AppModel
27 | initialModel =
28 |     { progressModel = childModel }
29 | 
30 | 
31 | init : ( AppModel, Cmd Msg )
32 | init =
33 |     ( initialModel, Cmd.none )
34 | 
35 | 
36 | 
37 | -- MESSAGES
38 | 
39 | 
40 | type Msg
41 |     = ProgressMsg ScrollProgress.Msg
42 | 
43 | 
44 | 
45 | -- VIEW
46 | 
47 | 
48 | view : AppModel -> Html Msg
49 | view model =
50 |     Html.div []
51 |         [ Html.App.map ProgressMsg (ScrollProgress.view model.progressModel) ]
52 | 
53 | 
54 | 
55 | -- UPDATE
56 | 
57 | 
58 | update : Msg -> AppModel -> ( AppModel, Cmd Msg )
59 | update message model =
60 |     case message of
61 |         ProgressMsg subMsg ->
62 |             let
63 |                 ( updatedProgessModel, progressCmd ) =
64 |                     ScrollProgress.update subMsg model.progressModel
65 |             in
66 |                 ( { model | progressModel = updatedProgessModel }, Cmd.map ProgressMsg progressCmd )
67 | 
68 | 
69 | 
70 | -- SUBSCIPTIONS
71 | 
72 | 
73 | subscriptions : AppModel -> Sub Msg
74 | subscriptions model =
75 |     Ports.onScroll (ProgressMsg << ScrollProgress.Progress)
76 | 
77 | 
78 | 
79 | -- APP
80 | 
81 | 
82 | main : Program Never
83 | main =
84 |     Html.App.program
85 |         { init = init
86 |         , view = view
87 |         , update = update
88 |         , subscriptions = subscriptions
89 |         }
90 | 


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/examples/document/src/Ports.elm:
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 1 | port module Ports exposing (..)
 2 | 
 3 | import ScrollProgress exposing (ScrollAttributes)
 4 | 
 5 | 
 6 | -- PORTS
 7 | 
 8 | 
 9 | port onScroll : (ScrollAttributes -> msg) -> Sub msg
10 | 


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/examples/document/src/favicon.ico:
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https://raw.githubusercontent.com/chrisbuttery/elm-scroll-progress/3e4dd2c1812812f878ba4bf3435b2380b43c6c1c/examples/document/src/favicon.ico


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/examples/document/src/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta http-equiv="x-ua-compatible" content="ie=edge">
 6 |     <link href="https://fonts.googleapis.com/css?family=Libre+Baskerville|Open+Sans" rel="stylesheet">
 7 |     <title>Elm App</title>
 8 | </head>
 9 | <body>
10 |     <div id="root"></div>
11 |     <div class="article">
12 |       <h1>The Happy Panda</h1>
13 |       <div class="panda"></div>
14 |       <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
15 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
16 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
17 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
18 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
19 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
20 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
21 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
22 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
23 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
24 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
25 |       </p>
26 |       <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
27 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
28 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
29 |       consequat.</p>
30 |       <p>Duis aute irure dolor in reprehenderit in voluptate velit esse
31 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
32 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
33 |       tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
34 |       quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
35 |       consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
36 |       cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
37 |       proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
38 |       </p>
39 |       <p>Story written by The Happy Panda</p>
40 |     </div>
41 | </body>
42 | </html>
43 | 


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/examples/document/src/index.js:
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 1 | require('./main.css');
 2 | 
 3 | const Elm = require('./Main.elm');
 4 | const root  = document.getElementById('root');
 5 | const app = Elm.Main.embed(root);
 6 | 
 7 | const target = document.documentElement;
 8 | // ... or target a specific element
 9 | // const target = document.querySelector('.article');
10 | 
11 | window.addEventListener('scroll', function() {
12 |   app.ports.onScroll.send({
13 |     scrollTop: document.documentElement.scrollTop || document.body.scrollTop,
14 |     targetScrollHeight: target.scrollHeight,
15 |     clientHeight: document.documentElement.clientHeight
16 |   });
17 | });


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/examples/document/src/main.css:
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  1 | body {
  2 |   background: #ccc;
  3 |   height: 2000px;
  4 |   margin: 0;
  5 |   position: relative;
  6 | }
  7 | 
  8 | #root {
  9 |   left: 0;
 10 |   position: fixed;
 11 |   top: 0;
 12 |   width: 100%;
 13 |   z-index: 20;
 14 | }
 15 | 
 16 | .scroll-progress {
 17 |   font-size: 12px;
 18 |   font: menu;
 19 |   height: 4px;
 20 | }
 21 | 
 22 | .article {
 23 |   background: white;
 24 |   border-radius: 2px;
 25 |   border-radius: 2px;
 26 |   border: 1px solid #c1c1c1;
 27 |   font: menu;
 28 |   margin: 60px auto;
 29 |   max-width: 800px;
 30 |   padding: 30px;
 31 |   position: relative;
 32 |   width: 80%;
 33 |   z-index: 10;
 34 | }
 35 | 
 36 | .article:after {
 37 |   background: #fff;
 38 |   box-shadow: 0 10px 10px #b2b2b2;
 39 |   content: "";
 40 |   height: 100%;
 41 |   left: 0;
 42 |   position: absolute;
 43 |   top: 0;
 44 |   width: 100%;
 45 |   z-index: -10;
 46 | }
 47 | 
 48 | h1 {
 49 |   color: rgba(0, 0, 0, 0.8);
 50 |   font-family: 'Libre Baskerville', serif;
 51 |   font-size: 3.3em;
 52 |   padding: 30px 0 50px 0;
 53 |   text-align: center;
 54 | }
 55 | 
 56 | p {
 57 |   color: rgba(0, 0, 0, 0.8);
 58 |   font-family: 'Open Sans', sans-serif;
 59 |   font-size: 21px;
 60 |   line-height: 1.58;
 61 |   margin: 0;
 62 |   text-indent: 30px;
 63 | }
 64 | 
 65 | p:first-of-type {
 66 |   text-indent: 0;
 67 | }
 68 | 
 69 | p:first-of-type:first-letter {
 70 |   background-color: #699933;
 71 |   border: 4px solid #577f2a;
 72 |   color: white;
 73 |   float: left;
 74 |   font-family: Georgia;
 75 |   font-size: 60px;
 76 |   line-height: 50px;
 77 |   margin: 10px 30px 10px 10px;
 78 |   padding: 20px;
 79 | }
 80 | 
 81 | p:nth-of-type(2) {
 82 |   border-left: 4px solid rgba(105, 153, 51, 0.15);
 83 |   color: #577f2a;
 84 |   font-family: 'Libre Baskerville', serif;
 85 |   margin: 30px 10px;
 86 |   padding: 0 20px 0 30px;
 87 |   text-indent: 0;
 88 | }
 89 | 
 90 | p:nth-of-type(4) {
 91 |   color: rgb(198, 198, 198);
 92 |   font-family: 'Libre Baskerville';
 93 |   font-size: 15px;
 94 |   margin-top: 20px;
 95 | }
 96 | 
 97 | .panda {
 98 |   background: url('./panda.jpg') no-repeat center;
 99 |   background-size: cover;
100 |   height: 400px;
101 |   margin: 20px 20px 40px 0;
102 |   width: 100%;
103 | }
104 | 


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/examples/document/src/panda.jpg:
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https://raw.githubusercontent.com/chrisbuttery/elm-scroll-progress/3e4dd2c1812812f878ba4bf3435b2380b43c6c1c/examples/document/src/panda.jpg


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/src/ScrollProgress.elm:
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  1 | module ScrollProgress exposing (..)
  2 | 
  3 | {-| ScrollProgress functions and Msg.
  4 | 
  5 | # Model
  6 | @docs Model, ScrollAttributes, initialModel
  7 | 
  8 | # Message
  9 | @docs Msg
 10 | 
 11 | # Update function
 12 | @docs update, calculateProgress
 13 | 
 14 | # View function
 15 | @docs view
 16 | 
 17 | -}
 18 | 
 19 | import Html exposing (Html, text, div)
 20 | import Html.App as App
 21 | import Html.Attributes exposing (style, class)
 22 | 
 23 | 
 24 | {-| A type representing a model.
 25 | -}
 26 | type alias Model =
 27 |     { progress : Int
 28 |     , color : Maybe String
 29 |     , from : Maybe String
 30 |     , to : Maybe String
 31 |     }
 32 | 
 33 | 
 34 | {-| A type representing the arrtibutes we're expecting 'on scroll'.
 35 | -}
 36 | type alias ScrollAttributes =
 37 |     { scrollTop : Int
 38 |     , targetScrollHeight : Int
 39 |     , clientHeight : Int
 40 |     }
 41 | 
 42 | 
 43 | {-| Initalize the model
 44 | -}
 45 | initialModel : Model
 46 | initialModel =
 47 |     { progress = 0
 48 |     , color = Just "#1684f6"
 49 |     , from = Nothing
 50 |     , to = Nothing
 51 |     }
 52 | 
 53 | 
 54 | {-| A union type representing The Elm Architect's `Msg`
 55 | -}
 56 | type Msg
 57 |     = Progress ScrollAttributes
 58 | 
 59 | 
 60 | {-| A function to calculate the percentage an element has been scrolled
 61 | -}
 62 | calculateProgress : ScrollAttributes -> Int
 63 | calculateProgress attributes =
 64 |     let
 65 |         scrollTop =
 66 |             toFloat attributes.scrollTop
 67 | 
 68 |         targetScrollHeight =
 69 |             toFloat attributes.targetScrollHeight
 70 | 
 71 |         clientHeight =
 72 |             toFloat attributes.clientHeight
 73 | 
 74 |         progress =
 75 |             scrollTop
 76 |                 / (targetScrollHeight - clientHeight)
 77 |                 * 100
 78 |                 |> ceiling
 79 |     in
 80 |         if progress > 100 then
 81 |             100
 82 |         else if progress < 0 then
 83 |             0
 84 |         else
 85 |             progress
 86 | 
 87 | 
 88 | {-| The Elm Architect's update function.
 89 | -}
 90 | update : Msg -> Model -> ( Model, Cmd Msg )
 91 | update msg model =
 92 |     case msg of
 93 |         Progress attributes ->
 94 |             ( { model | progress = calculateProgress attributes }, Cmd.none )
 95 | 
 96 | 
 97 | {-| A view function that will render the scroll progress ekement.
 98 | -}
 99 | view : Model -> Html Msg
100 | view model =
101 |     let
102 |         color =
103 |             Maybe.withDefault "" model.color
104 | 
105 |         from =
106 |             Maybe.withDefault "" model.from
107 | 
108 |         to =
109 |             Maybe.withDefault "" model.to
110 | 
111 |         background =
112 |             if color == "" && from /= "" && to /= "" then
113 |                 [ ( "background", from )
114 |                 , ( "background", "linear-gradient( to right, " ++ from ++ ", " ++ to ++ " )" )
115 |                 ]
116 |             else if color /= "" then
117 |                 [ ( "background", color ) ]
118 |             else
119 |                 [ ( "background", "red" ) ]
120 | 
121 |         transition =
122 |             [ ( "transition", "0.1s width" )
123 |             , ( "width", (toString model.progress) ++ "%" )
124 |             ]
125 | 
126 |         styles =
127 |             List.append background transition
128 |     in
129 |         div
130 |             [ class "scroll-progress"
131 |             , style styles
132 |             ]
133 |             []
134 | 


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