├── .gitignore
├── CONTRIBUTING.md
├── LICENSE
├── README.md
├── index.html
├── main.css
├── manifest.json
├── manifest.webapp
├── package.json
└── scripts
    ├── main.es6_FINAL.js
    └── main.js


/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | 


--------------------------------------------------------------------------------
/CONTRIBUTING.md:
--------------------------------------------------------------------------------
  1 | # Contributing to this Codelab
  2 | 
  3 | We'd love for you to contribute to our source code and to make this codelab even better than it is today! Here are the guidelines we'd like you to follow:
  4 | 
  5 |  - [Code of Conduct](#coc)
  6 |  - [Question or Problem?](#question)
  7 |  - [Issues and Bugs](#issue)
  8 |  - [Feature Requests](#feature)
  9 |  - [Submission Guidelines](#submit)
 10 |  - [Coding Rules](#rules)
 11 |  - [Signing the CLA](#cla)
 12 | 
 13 | ## <a name="coc"></a> Code of Conduct
 14 | 
 15 | As contributors and maintainers of the Codelab projects, we pledge to respect everyone who contributes by posting issues, updating documentation, submitting pull requests, providing feedback in comments, and any other activities.
 16 | 
 17 | Communication through any of Google Developers's channels (GitHub, StackOverflow, Google+, Twitter, etc.) must be constructive and never resort to personal attacks, trolling, public or private harassment, insults, or other unprofessional conduct.
 18 | 
 19 | We promise to extend courtesy and respect to everyone involved in this project regardless of gender, gender identity, sexual orientation, disability, age, race, ethnicity, religion, or level of experience. We expect anyone contributing to the project to do the same.
 20 | 
 21 | If any member of the community violates this code of conduct, the maintainers of the Codelab projects may take action, removing issues, comments, and PRs or blocking accounts as deemed appropriate.
 22 | 
 23 | If you are subject to or witness unacceptable behavior, or have any other concerns, please drop us a line at nivco@google.com.
 24 | 
 25 | ## <a name="question"></a> Got a Question or Problem?
 26 | 
 27 | If you have questions about how to use this codelab, please do so on GitHub issues.
 28 | 
 29 | If you feel that we're missing an important bit of documentation, feel free to
 30 | file an issue so we can help. Here's an example to get you started:
 31 | 
 32 | ```
 33 | What are you trying to do or find out more about?
 34 | 
 35 | Where have you looked?
 36 | 
 37 | Where did you expect to find this information?
 38 | ```
 39 | 
 40 | ## <a name="issue"></a> Found an Issue?
 41 | If you find a bug in the source code or a mistake in the documentation, you can help us by
 42 | submitting an issue to our [GitHub Repository][github]. Even better you can submit a Pull Request
 43 | with a fix.
 44 | 
 45 | See [below](#submit) for some guidelines.
 46 | 
 47 | ## <a name="submit"></a> Submission Guidelines
 48 | 
 49 | ### Submitting an Issue
 50 | Before you submit your issue search the archive, maybe your question was already answered.
 51 | 
 52 | If your issue appears to be a bug, and hasn't been reported, open a new issue.
 53 | Help us to maximize the effort we can spend fixing issues and adding new
 54 | features, by not reporting duplicate issues.  Providing the following information will increase the
 55 | chances of your issue being dealt with quickly:
 56 | 
 57 | * **Overview of the Issue** - if an error is being thrown a non-minified stack trace helps
 58 | * **Motivation for or Use Case** - explain why this is a bug for you
 59 | * **Browsers and Operating System** - is this a problem with all browsers or only IE9?
 60 | * **Reproduce the Error** - provide a live example (using JSBin) or a unambiguous set of steps.
 61 | * **Related Issues** - has a similar issue been reported before?
 62 | * **Suggest a Fix** - if you can't fix the bug yourself, perhaps you can point to what might be
 63 |   causing the problem (line of code or commit)
 64 | 
 65 | **If you get help, help others. Good karma rulez!**
 66 | 
 67 | Here's a template to get you started:
 68 | 
 69 | ```
 70 | Browser:
 71 | Browser version:
 72 | Operating system:
 73 | Operating system version:
 74 | 
 75 | What steps will reproduce the problem:
 76 | 1.
 77 | 2.
 78 | 3.
 79 | 
 80 | What is the expected result?
 81 | 
 82 | What happens instead of that?
 83 | 
 84 | Please provide any other information below, and attach a screenshot if possible.
 85 | ```
 86 | 
 87 | ### Submitting a Pull Request
 88 | Before you submit your pull request consider the following guidelines:
 89 | 
 90 | * Search [GitHub](https://github.com/googlecodelab/chrome-es2015/pulls) for an open or closed Pull Request
 91 |   that relates to your submission. You don't want to duplicate effort.
 92 | * Please sign our [Contributor License Agreement (CLA)](#cla) before sending pull
 93 |   requests. We cannot accept code without this.
 94 | * Make your changes in a new git branch:
 95 | 
 96 |      ```shell
 97 |      git checkout -b my-fix-branch master
 98 |      ```
 99 | 
100 | * Create your patch, **including appropriate test cases**.
101 | * Follow our [Coding Rules](#rules).
102 | * Avoid checking in files that shouldn't be tracked (e.g `node_modules`, `gulp-cache`, `.tmp`, `.idea`). We recommend using a [global](#global-gitignore) gitignore for this.
103 | * Make sure **not** to include a recompiled version of the files found in `/css` and `/js` as part of your PR. We will generate these automatically.
104 | * Commit your changes using a descriptive commit message.
105 | 
106 |      ```shell
107 |      git commit -a
108 |      ```
109 |   Note: the optional commit `-a` command line option will automatically "add" and "rm" edited files.
110 | 
111 | * Build your changes locally to ensure all the tests pass:
112 | 
113 |     ```shell
114 |    gulp
115 |     ```
116 | 
117 | * Push your branch to GitHub:
118 | 
119 |     ```shell
120 |     git push origin my-fix-branch
121 |     ```
122 | 
123 | * In GitHub, send a pull request to `chrome-es2015:master`.
124 | * If we suggest changes then:
125 |   * Make the required updates.
126 |   * Rebase your branch and force push to your GitHub repository (this will update your Pull Request):
127 | 
128 |     ```shell
129 |     git rebase master -i
130 |     git push origin my-fix-branch -f
131 |     ```
132 | 
133 | That's it! Thank you for your contribution!
134 | 
135 | #### After your pull request is merged
136 | 
137 | After your pull request is merged, you can safely delete your branch and pull the changes
138 | from the main (upstream) repository:
139 | 
140 | * Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:
141 | 
142 |     ```shell
143 |     git push origin --delete my-fix-branch
144 |     ```
145 | 
146 | * Check out the master branch:
147 | 
148 |     ```shell
149 |     git checkout master -f
150 |     ```
151 | 
152 | * Delete the local branch:
153 | 
154 |     ```shell
155 |     git branch -D my-fix-branch
156 |     ```
157 | 
158 | * Update your master with the latest upstream version:
159 | 
160 |     ```shell
161 |     git pull --ff upstream master
162 |     ```
163 | 
164 | ## <a name="rules"></a> Coding Rules
165 | 
166 | We generally follow the [Google JavaScript style guide][js-style-guide].
167 | 
168 | ## <a name="cla"></a> Signing the CLA
169 | 
170 | Please sign our [Contributor License Agreement][google-cla] (CLA) before sending pull requests. For any code
171 | changes to be accepted, the CLA must be signed. It's a quick process, we promise!
172 | 
173 | *This guide was inspired by the [AngularJS contribution guidelines](https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md).*
174 | 
175 | [github]: https://github.com/googlecodelabs/chrome-es2015
176 | [google-cla]: https://cla.developers.google.com
177 | [js-style-guide]: http://google.github.io/styleguide/javascriptguide.xml
178 | [py-style-guide]: http://google.github.io/styleguide/pyguide.html
179 | [jsbin]: http://jsbin.com/
180 | [global-gitignore]: https://help.github.com/articles/ignoring-files/#create-a-global-gitignore
181 | 


--------------------------------------------------------------------------------
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/README.md:
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1 | ![](https://cloud.githubusercontent.com/assets/110953/7877439/6a69d03e-0590-11e5-9fac-c614246606de.png)
2 | ## Codelab: Building your first ES2015 app
3 | 
4 | This repo contains the initial and final code for the [Building your first ES2015 app](http://www.code-labs.io/codelabs/chrome-es2015) codelab. (Not published yet! Working on it!)
5 | 
6 | 


--------------------------------------------------------------------------------
/index.html:
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 1 | <!doctype html>
 2 | <!--
 3 |   Copyright 2015 Google Inc. All rights reserved.
 4 |   Licensed under the Apache License, Version 2.0 (the "License");
 5 |   you may not use this file except in compliance with the License.
 6 |   You may obtain a copy of the License at
 7 |       https://www.apache.org/licenses/LICENSE-2.0
 8 |   Unless required by applicable law or agreed to in writing, software
 9 |   distributed under the License is distributed on an "AS IS" BASIS,
10 |   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 |   See the License for the specific language governing permissions and
12 |   limitations under the License
13 | -->
14 | <html lang="en">
15 | <head>
16 |   <meta charset="utf-8">
17 |   <meta http-equiv="X-UA-Compatible" content="IE=edge">
18 |   <meta name="description" content="Simple Sticky Notes app">
19 |   <meta name="viewport" content="width=device-width, initial-scale=1.0">
20 |   <title>Simple Sticky Notes</title>
21 | 
22 |   <!-- Disable tap highlight on IE -->
23 |   <meta name="msapplication-tap-highlight" content="no">
24 | 
25 |   <!-- Web Application Manifest -->
26 |   <link rel="manifest" href="manifest.json">
27 | 
28 |   <!-- Add to homescreen for Chrome on Android -->
29 |   <meta name="mobile-web-app-capable" content="yes">
30 |   <meta name="application-name" content="Simple Sticky Notes">
31 |   <meta name="theme-color" content="#303F9F">
32 | 
33 |   <!-- Add to homescreen for Safari on iOS -->
34 |   <meta name="apple-mobile-web-app-capable" content="yes">
35 |   <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
36 |   <meta name="apple-mobile-web-app-title" content="Simple Sticky Notes">
37 |   <meta name="apple-mobile-web-app-status-bar-style" content="#303F9F">
38 | 
39 |   <!-- Tile icon for Win8 -->
40 |   <meta name="msapplication-TileImage" content="images/touch/touch-icon-144x144.png">
41 |   <meta name="msapplication-TileColor" content="#3372DF">
42 |   <meta name="msapplication-navbutton-color" content="#303F9F">
43 | 
44 |   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:regular,bold,italic,thin,light,bolditalic,black,medium&amp;lang=en">
45 |   <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
46 |   <link rel="stylesheet" href="https://storage.googleapis.com/code.getmdl.io/1.0.6/material.blue_grey-orange.min.css">
47 |   <link rel="stylesheet" href="main.css">
48 | </head>
49 | <body>
50 | <div class="demo-layout mdl-layout mdl-js-layout mdl-layout--fixed-header">
51 | 
52 |   <!-- Header section containing logo -->
53 |   <header class="mdl-layout__header mdl-color-text--white mdl-color--primary">
54 |     <div class="mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-grid">
55 |       <div class="mdl-layout__header-row mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-cell--12-col-desktop">
56 |         <h3><i class="material-icons">chrome_reader_mode</i> Simple Sticky Notes</h3>
57 |       </div>
58 |     </div>
59 |   </header>
60 | 
61 |   <main class="mdl-layout__content mdl-color--grey-100">
62 |     <div id="notes-container" class="mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-grid">
63 | 
64 |       <!-- Card containing the inputs to add a new sticky note -->
65 |       <div class="mdl-card mdl-shadow--2dp mdl-cell">
66 |         <div class="mdl-card__title mdl-color--blue-grey-200">
67 |           <h2 class="mdl-card__title-text">Add new note</h2>
68 |         </div>
69 |         <div class="mdl-card__supporting-text mdl-color-text--grey-600">
70 |             <div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label">
71 |               <textarea class="mdl-textfield__input" rows= "3" id="message"></textarea>
72 |               <label class="mdl-textfield__label" for="message">Message text...</label>
73 |             </div>
74 |             <button id="save" disabled class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect mdl-button--color">
75 |               Add
76 |             </button>
77 |         </div>
78 |       </div>
79 | 
80 |       <!-- Section separator for the sticky notes -->
81 |       <div id="notes-section-title" class="mdl-card mdl-shadow--2dp mdl-cell mdl-cell--12-col mdl-cell--12-col-tablet mdl-cell--12-col-desktop">
82 |         <div class="mdl-card__title mdl-color--blue-grey-200">
83 |           <h2 class="mdl-card__title-text">Your sticky notes</h2>
84 |         </div>
85 |       </div>
86 |     </div>
87 |   </main>
88 | </div>
89 | 
90 | <script src="https://storage.googleapis.com/code.getmdl.io/1.0.6/material.min.js"></script>
91 | <script src="scripts/main.js"></script>
92 | </body>
93 | </html>
94 | 


--------------------------------------------------------------------------------
/main.css:
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 1 | /**
 2 |  * Copyright 2015 Google Inc. All Rights Reserved.
 3 |  *
 4 |  * Licensed under the Apache License, Version 2.0 (the "License");
 5 |  * you may not use this file except in compliance with the License.
 6 |  * You may obtain a copy of the License at
 7 |  *
 8 |  *      http://www.apache.org/licenses/LICENSE-2.0
 9 |  *
10 |  * Unless required by applicable law or agreed to in writing, software
11 |  * distributed under the License is distributed on an "AS IS" BASIS,
12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 |  * See the License for the specific language governing permissions and
14 |  * limitations under the License.
15 |  */
16 | 
17 | html, body {
18 |   font-family: 'Roboto', 'Helvetica', sans-serif;
19 | }
20 | .mdl-grid {
21 |   max-width: 1024px;
22 |   margin: 20px auto;
23 | }
24 | .material-icons {
25 |   font-size: 36px;
26 |   top: 5px;
27 |   position: relative;
28 | }
29 | .mdl-layout__header-row {
30 |   padding: 0;
31 |   margin: 0;
32 | }
33 | #save {
34 |   width: 100%;
35 | }
36 | #notes-container {
37 |   padding: 0;
38 |   width: 100%;
39 | }
40 | .mdl-card {
41 |   min-height: 0;
42 | }
43 | .message {
44 |   font-size: 28px;
45 |   line-height: 32px;
46 |   font-weight: 200;
47 |   padding-bottom: 30px;
48 | }
49 | .delete {
50 |   position: absolute;
51 |   bottom: 0;
52 |   right: 0;
53 |   color: #BBB;
54 |   font-size: 10px;
55 |   height: 25px;
56 |   line-height: 25px;
57 | }
58 | .delete:HOVER {
59 |   color: inherit;
60 | }
61 | .date {
62 |   position: absolute;
63 |   padding: 5px 15px;
64 |   bottom: 0;
65 |   left: 0;
66 |   font-style: italic;
67 |   font-size: 12px;
68 |   color: #BBB;
69 | }
70 | #notes-section-title {
71 |   margin-top: 20px;
72 | }
73 | .mdl-card__supporting-text {
74 |   background: linear-gradient(white, #f9f9f9);
75 | }
76 | .sticky-note {
77 |   background: linear-gradient(#FFF93A, #FFFC9E);
78 |   min-height:250px;
79 | }
80 | 


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/manifest.json:
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1 | {
2 |   "name": "Simple Sticky Notes",
3 |   "short_name": "Sticky Notes",
4 |   "start_url": "/index.html",
5 |   "display": "standalone",
6 |   "orientation": "portrait"
7 | }
8 | 


--------------------------------------------------------------------------------
/manifest.webapp:
--------------------------------------------------------------------------------
 1 | {
 2 |   "version": "1.0.0",
 3 |   "name": "Simple Sticky Notes",
 4 |   "launch_path": "/index.html",
 5 |   "description": "Simple Sticky Notes app",
 6 |   "developer": {
 7 |     "name": "",
 8 |     "url": ""
 9 |   },
10 |   "installs_allowed_from": [
11 |     "*"
12 |   ],
13 |   "default_locale": "en",
14 |   "permissions": {
15 |   },
16 |   "locales": {
17 |     "en": {
18 |       "name": "Simple Sticky Notes",
19 |       "description": "Simple Sticky Notes app"
20 |     }
21 |   }
22 | }
23 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "chrome-es2015-codelab",
 3 |   "description": "ES2015 Codelab",
 4 |   "license": "Apache-2.0",
 5 |   "author": "Google",
 6 |   "repository": "googlecodelabs/chrome-es2015",
 7 |   "devDependencies": {
 8 |     "serve": "^1.4.0"
 9 |   },
10 |   "scripts": {
11 |     "start": "serve --port 52587"
12 |   }
13 | }
14 | 


--------------------------------------------------------------------------------
/scripts/main.es6_FINAL.js:
--------------------------------------------------------------------------------
  1 | /**
  2 |  * Copyright 2015 Google Inc. All Rights Reserved.
  3 |  *
  4 |  * Licensed under the Apache License, Version 2.0 (the "License");
  5 |  * you may not use this file except in compliance with the License.
  6 |  * You may obtain a copy of the License at
  7 |  *
  8 |  *      http://www.apache.org/licenses/LICENSE-2.0
  9 |  *
 10 |  * Unless required by applicable law or agreed to in writing, software
 11 |  * distributed under the License is distributed on an "AS IS" BASIS,
 12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13 |  * See the License for the specific language governing permissions and
 14 |  * limitations under the License.
 15 |  */
 16 | 'use strict';
 17 | 
 18 | // A Sticky Notes app.
 19 | class StickyNotesApp {
 20 | 
 21 |   // Initializes the Sticky Notes app.
 22 |   constructor() {
 23 |     // Shortcuts to DOM Elements.
 24 |     this.notesContainer = document.getElementById('notes-container');
 25 |     this.noteMessageInput = document.getElementById('message');
 26 |     this.addNoteButton = document.getElementById('save');
 27 |     this.notesSectionTitle = document.getElementById('notes-section-title');
 28 | 
 29 |     // Saves notes on button click.
 30 |     this.addNoteButton.addEventListener('click', () => this.saveNote());
 31 | 
 32 |     // Toggle for the button.
 33 |     this.noteMessageInput.addEventListener('keyup', () => this.toggleButton());
 34 | 
 35 |     // Loads all the notes.
 36 |     for (let key in localStorage) {
 37 |       this.displayNote(key, localStorage[key]);
 38 |     }
 39 |     // Listen for updates to notes from other windows.
 40 |     window.addEventListener('storage', e => this.displayNote(e.key, e.newValue));
 41 |   }
 42 | 
 43 |   // Saves a new sticky note on localStorage.
 44 |   saveNote() {
 45 |     if (this.noteMessageInput.value) {
 46 |       let key = Date.now().toString();
 47 |       localStorage.setItem(key, this.noteMessageInput.value);
 48 |       this.displayNote(key, this.noteMessageInput.value);
 49 |       StickyNotesApp.resetMaterialTextfield(this.noteMessageInput);
 50 |       this.toggleButton();
 51 |     }
 52 |   }
 53 | 
 54 |   // Resets the given MaterialTextField.
 55 |   static resetMaterialTextfield(element) {
 56 |     element.value = '';
 57 |     element.parentNode.MaterialTextfield.boundUpdateClassesHandler();
 58 |     element.blur();
 59 |   }
 60 | 
 61 |   // Creates/updates/deletes a note in the UI.
 62 |   displayNote(key, message) {
 63 |     let note = document.getElementById(key);
 64 |     // If no element with the given key exists we create a new note.
 65 |     if (!note) {
 66 |       note = document.createElement('sticky-note');
 67 |       note.id = key;
 68 |       this.notesContainer.insertBefore(note, this.notesSectionTitle.nextSibling);
 69 |     }
 70 |     // If the message is null we delete the note.
 71 |     if (!message) {
 72 |       return note.deleteNote();
 73 |     }
 74 |     note.setMessage(message);
 75 |   }
 76 | 
 77 |   // Enables or disables the submit button depending on the values of the input field.
 78 |   toggleButton() {
 79 |     if (this.noteMessageInput.value) {
 80 |       this.addNoteButton.removeAttribute('disabled');
 81 |     } else {
 82 |       this.addNoteButton.setAttribute('disabled', 'true');
 83 |     }
 84 |   }
 85 | }
 86 | 
 87 | // On load start the app.
 88 | window.addEventListener('load', () => new StickyNotesApp());
 89 | 
 90 | // This is a Sticky Note custom element.
 91 | class StickyNote extends HTMLElement {
 92 | 
 93 |   // Fires when an instance of the element is created.
 94 |   createdCallback() {
 95 |     this.classList.add(...StickyNote.CLASSES);
 96 |     this.innerHTML = StickyNote.TEMPLATE;
 97 |     this.messageElement = this.querySelector('.message');
 98 |     this.dateElement = this.querySelector('.date');
 99 |     this.deleteButton = this.querySelector('.delete');
100 |     this.deleteButton.addEventListener('click', () => this.deleteNote());
101 |   }
102 | 
103 |   // Fires when an attribute of the element is added/deleted/modified.
104 |   attributeChangedCallback(attributeName) {
105 |     // We display/update the created date message if the id changes.
106 |     if (attributeName == 'id') {
107 |       let date;
108 |       if (this.id) {
109 |         date = new Date(parseInt(this.id));
110 |       } else {
111 |         date = new Date();
112 |       }
113 | 
114 |       // Format the date
115 |       let dateFormatterOptions = {day: 'numeric', month: 'short'};
116 |       let shortDate = new Intl.DateTimeFormat("en-US", dateFormatterOptions).format(date);
117 | 
118 |       this.dateElement.textContent = `Created on ${shortDate}`;
119 |     }
120 |   }
121 | 
122 |   // Sets the message of the note.
123 |   setMessage(message) {
124 |     this.messageElement.textContent = message;
125 |     // Replace all line breaks by <br>.
126 |     this.messageElement.innerHTML = this.messageElement.innerHTML.replace(/\n/g, '<br>');
127 |   }
128 | 
129 |   // Deletes the note by removing the element from the DOM and the data from localStorage.
130 |   deleteNote() {
131 |     localStorage.removeItem(this.id);
132 |     this.parentNode.removeChild(this);
133 |   }
134 | }
135 | 
136 | // Initial content of the element.
137 | StickyNote.TEMPLATE = `
138 |     <div class="message"></div>
139 |     <div class="date"></div>
140 |     <button class="delete mdl-button mdl-js-button mdl-js-ripple-effect">
141 |       Delete
142 |     </button>`;
143 | 
144 | // StickyNote elements top level style classes.
145 | StickyNote.CLASSES = ['mdl-cell--4-col-desktop', 'mdl-card__supporting-text', 'mdl-cell--12-col',
146 |   'mdl-shadow--2dp', 'mdl-cell--4-col-tablet', 'mdl-card', 'mdl-cell', 'sticky-note'];
147 | 
148 | customElements.define('sticky-note', StickyNote);
149 | 


--------------------------------------------------------------------------------
/scripts/main.js:
--------------------------------------------------------------------------------
  1 | /**
  2 |  * Copyright 2015 Google Inc. All Rights Reserved.
  3 |  *
  4 |  * Licensed under the Apache License, Version 2.0 (the "License");
  5 |  * you may not use this file except in compliance with the License.
  6 |  * You may obtain a copy of the License at
  7 |  *
  8 |  *      http://www.apache.org/licenses/LICENSE-2.0
  9 |  *
 10 |  * Unless required by applicable law or agreed to in writing, software
 11 |  * distributed under the License is distributed on an "AS IS" BASIS,
 12 |  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13 |  * See the License for the specific language governing permissions and
 14 |  * limitations under the License.
 15 |  */
 16 | 'use strict';
 17 | 
 18 | // Initializes the Sticky Notes app.
 19 | function StickyNotesApp() {
 20 |   // Shortcuts to DOM Elements.
 21 |   this.notesContainer = document.getElementById('notes-container');
 22 |   this.noteMessageInput = document.getElementById('message');
 23 |   this.addNoteButton = document.getElementById('save');
 24 |   this.notesSectionTitle = document.getElementById('notes-section-title');
 25 | 
 26 |   // Saves notes on button click.
 27 |   this.addNoteButton.addEventListener('click', this.saveNote.bind(this));
 28 | 
 29 |   // Toggle for the button.
 30 |   this.noteMessageInput.addEventListener('keyup', this.toggleButton.bind(this));
 31 | 
 32 |   // Loads all the notes.
 33 |   for (var key in localStorage) {
 34 |     this.displayNote(key, localStorage[key]);
 35 |   }
 36 | 
 37 |   // Listen for updates to notes from other windows.
 38 |   window.addEventListener('storage', function(e) {
 39 |     this.displayNote(e.key, e.newValue);
 40 |   }.bind(this));
 41 | }
 42 | 
 43 | // Saves a new sticky note on localStorage.
 44 | StickyNotesApp.prototype.saveNote = function() {
 45 |   if (this.noteMessageInput.value) {
 46 |     var key = Date.now().toString();
 47 |     localStorage.setItem(key, this.noteMessageInput.value);
 48 |     this.displayNote(key, this.noteMessageInput.value);
 49 |     StickyNotesApp.resetMaterialTextfield(this.noteMessageInput);
 50 |     this.toggleButton();
 51 |   }
 52 | };
 53 | 
 54 | // Resets the given MaterialTextField.
 55 | StickyNotesApp.resetMaterialTextfield = function(element) {
 56 |   element.value = '';
 57 |   element.parentNode.MaterialTextfield.boundUpdateClassesHandler();
 58 |   element.blur();
 59 | };
 60 | 
 61 | // Creates/updates/deletes a note in the UI.
 62 | StickyNotesApp.prototype.displayNote = function(key, message) {
 63 |   var note = document.getElementById(key);
 64 |   // If no element with the given key exists we create a new note.
 65 |   if (!note) {
 66 |     note = document.createElement('sticky-note');
 67 |     note.id = key;
 68 |     this.notesContainer.insertBefore(note, this.notesSectionTitle.nextSibling);
 69 |   }
 70 |   // If the message is null we delete the note.
 71 |   if (!message) {
 72 |     return note.deleteNote();
 73 |   }
 74 |   note.setMessage(message);
 75 | };
 76 | 
 77 | // Enables or disables the submit button depending on the values of the input field.
 78 | StickyNotesApp.prototype.toggleButton = function() {
 79 |   if (this.noteMessageInput.value) {
 80 |     this.addNoteButton.removeAttribute('disabled');
 81 |   } else {
 82 |     this.addNoteButton.setAttribute('disabled', 'true');
 83 |   }
 84 | };
 85 | 
 86 | // On load start the app.
 87 | window.addEventListener('load', function() {
 88 |   new StickyNotesApp();
 89 | });
 90 | 
 91 | // A Sticky Note custom element that extends HTMLElement.
 92 | var StickyNote = Object.create(HTMLElement.prototype);
 93 | 
 94 | // Initial content of the element.
 95 | StickyNote.TEMPLATE =
 96 |   '<div class="message"></div>' +
 97 |   '<div class="date"></div>' +
 98 |   '<button class="delete mdl-button mdl-js-button mdl-js-ripple-effect">' +
 99 |     'Delete' +
100 |   '</button>';
101 | 
102 | // StickyNote elements top level style classes.
103 | StickyNote.CLASSES = ['mdl-cell--4-col-desktop', 'mdl-card__supporting-text', 'mdl-cell--12-col',
104 |   'mdl-shadow--2dp', 'mdl-cell--4-col-tablet', 'mdl-card', 'mdl-cell', 'sticky-note'];
105 | 
106 | // List of shortened month names.
107 | StickyNote.MONTHS = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'Jul', 'Aug', 'Sept', 'Oct', 'Nov',
108 |                      'Dec'];
109 | 
110 | // Fires when an instance of the element is created.
111 | StickyNote.createdCallback = function() {
112 |   StickyNote.CLASSES.forEach(function(klass) {
113 |     this.classList.add(klass);
114 |   }.bind(this));
115 |   this.innerHTML = StickyNote.TEMPLATE;
116 |   this.messageElement = this.querySelector('.message');
117 |   this.dateElement = this.querySelector('.date');
118 |   this.deleteButton = this.querySelector('.delete');
119 |   this.deleteButton.addEventListener('click', this.deleteNote.bind(this));
120 | };
121 | 
122 | // Fires when an attribute of the element is added/deleted/modified.
123 | StickyNote.attributeChangedCallback = function(attributeName) {
124 |   // We display/update the created date message if the id changes.
125 |   if (attributeName == 'id') {
126 |     if (this.id) {
127 |       var date = new Date(parseInt(this.id));
128 |     } else {
129 |       var date = new Date();
130 |     }
131 |     var month = StickyNote.MONTHS[date.getMonth()];
132 |     this.dateElement.textContent = 'Created on ' + month + ' ' + date.getDate();
133 |   }
134 | };
135 | 
136 | // Sets the message of the note.
137 | StickyNote.setMessage = function(message) {
138 |   this.messageElement.textContent = message;
139 |   // Replace all line breaks by <br>.
140 |   this.messageElement.innerHTML = this.messageElement.innerHTML.replace(/\n/g, '<br>');
141 | };
142 | 
143 | // Deletes the note by removing the element from the DOM and the data from localStorage.
144 | StickyNote.deleteNote = function() {
145 |   localStorage.removeItem(this.id);
146 |   this.parentNode.removeChild(this);
147 | };
148 | 
149 | customElements.define('sticky-note', {
150 |   prototype: StickyNote
151 | });
152 | 


--------------------------------------------------------------------------------