├── client ├── js │ ├── main.js │ ├── plugins.js │ └── vendor │ │ ├── modernizr-2.8.3.min.js │ │ └── jquery-1.12.0.min.js ├── img │ ├── ex1.gif │ ├── b-1.jpeg │ ├── b-2.jpeg │ ├── b-3.jpeg │ ├── b-4.jpeg │ ├── b-5.jpeg │ ├── f-1.jpeg │ ├── f-2.jpeg │ ├── f-3.jpeg │ ├── p-1.jpeg │ ├── s-1.jpeg │ ├── s-2.jpeg │ ├── s-3.jpeg │ ├── s-4.jpeg │ ├── t-1.jpeg │ ├── t-2.jpeg │ ├── t-3.jpeg │ ├── t-4.jpeg │ ├── t-5.jpeg │ ├── tr-1.jpeg │ ├── tr-2.jpeg │ ├── tr-3.jpeg │ └── tr-4.jpeg ├── apple-touch-icon.png ├── index.html └── css │ └── main.css ├── package.json ├── server ├── server.js ├── routers │ └── events-router.js └── data │ └── events-data.js ├── README.md └── .gitignore /client/js/main.js: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /client/img/ex1.gif: -------------------------------------------------------------------------------- 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-------------------------------------------------------------------------------- /client/js/plugins.js: -------------------------------------------------------------------------------- 1 | // Avoid `console` errors in browsers that lack a console. 2 | (function() { 3 | var method; 4 | var noop = function () {}; 5 | var methods = [ 6 | 'assert', 'clear', 'count', 'debug', 'dir', 'dirxml', 'error', 7 | 'exception', 'group', 'groupCollapsed', 'groupEnd', 'info', 'log', 8 | 'markTimeline', 'profile', 'profileEnd', 'table', 'time', 'timeEnd', 9 | 'timeline', 'timelineEnd', 'timeStamp', 'trace', 'warn' 10 | ]; 11 | var length = methods.length; 12 | var console = (window.console = window.console || {}); 13 | 14 | while (length--) { 15 | method = methods[length]; 16 | 17 | // Only stub undefined methods. 18 | if (!console[method]) { 19 | console[method] = noop; 20 | } 21 | } 22 | }()); 23 | 24 | // Place any jQuery/helper plugins in here. 25 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "node-js-rest-api", 3 | "version": "1.0.0", 4 | "description": "A Nodejs demo for IBM Connect 2016", 5 | "main": "gulpfile.js", 6 | "scripts": { 7 | "start": "node server/server.js", 8 | "test": "echo \"Error: no test specified\" && exit 1" 9 | }, 10 | "repository": { 11 | "type": "git", 12 | "url": "git+https://github.com/alex-arriaga/node-js-rest-api.git" 13 | }, 14 | "keywords": [ 15 | "nodejs", 16 | "restful", 17 | "api", 18 | "expressjs" 19 | ], 20 | "author": "Alex Arriaga", 21 | "license": "UNLICENSED", 22 | "private": true, 23 | "bugs": { 24 | "url": "https://github.com/alex-arriaga/node-js-rest-api/issues" 25 | }, 26 | "homepage": "https://github.com/alex-arriaga/node-js-rest-api#readme", 27 | "devDependencies": { 28 | "body-parser": "^1.14.2", 29 | "express": "^4.13.4", 30 | "gulp": "^3.9.0", 31 | "lodash": "^4.0.1", 32 | "morgan": "^1.6.1" 33 | } 34 | } 35 | -------------------------------------------------------------------------------- /server/server.js: -------------------------------------------------------------------------------- 1 | var express = require('express'); 2 | var bodyParser = require('body-parser'); 3 | var morgan = require('morgan'); 4 | var eventsRouter = require('./routers/events-router'); 5 | 6 | var app = express(); 7 | var port = 3000; 8 | 9 | app.use(morgan('dev')); 10 | app.use(express.static('client')); 11 | 12 | 13 | // Enable CORS on ExpressJS to avoid cross-origin errors when calling this server using AJAX 14 | // We are authorizing all domains to be able to manage information via AJAX (this is just for development) 15 | app.use((req, res, next) => { 16 | res.header("Access-Control-Allow-Origin", "*"); 17 | res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept,recording-session"); 18 | next(); 19 | }); 20 | 21 | app.use(bodyParser.urlencoded({extended: true})); 22 | app.use(bodyParser.json()); 23 | 24 | app.use('/events', eventsRouter); 25 | 26 | app.listen(port); 27 | console.log("Running app on port port. Visit: http://localhost:" + port + "/"); 28 | 29 | -------------------------------------------------------------------------------- /server/routers/events-router.js: -------------------------------------------------------------------------------- 1 | var eventsRouter = require('express').Router(); 2 | var eventsData = require('../data/events-data'); 3 | var _ = require('lodash'); 4 | 5 | var events = eventsData; 6 | var id = 12; 7 | 8 | var updateId = function (req, res, next) { 9 | console.log(req.body); 10 | if (!req.body.id) { 11 | id++; 12 | req.body.id = id + ''; 13 | } 14 | next(); 15 | }; 16 | 17 | eventsRouter.param('id', function (req, res, next, id) { 18 | var event = _.find(events, {id: id}); 19 | if (event) { 20 | req.event = event; 21 | next(); 22 | } else { 23 | res.json({"error": "Id not found"}); 24 | } 25 | }); 26 | 27 | eventsRouter.get('/', function (req, res) { 28 | res.json(events); 29 | }); 30 | 31 | eventsRouter.get('/:id', function (req, res) { 32 | var event = req.event; 33 | res.json(event || {}); 34 | }); 35 | 36 | eventsRouter.post('/', updateId, function (req, res) { 37 | var event = req.body; 38 | 39 | events.push(event); 40 | res.status(201).json(event || {}); 41 | }); 42 | 43 | eventsRouter.put('/:id', function (req, res) { 44 | var update = req.body; 45 | 46 | if (update.id) { 47 | delete update.id; 48 | } 49 | 50 | var event = _.findIndex(events, {id: req.params.id}); 51 | 52 | if (!events[event]) { 53 | res.send(); 54 | } else { 55 | var updatedEvent = _.assign(events[event], update); 56 | res.json(updatedEvent); 57 | } 58 | }); 59 | 60 | eventsRouter.delete('/:id', function (req, res) { 61 | var event = _.findIndex(events, {id: req.params.id}); 62 | events.splice(event, 1); 63 | 64 | res.json(req.event); 65 | }); 66 | 67 | // Error handler 68 | eventsRouter.use(function (err, req, res, next) { 69 | 70 | if (err) { 71 | res.status(500).send(err); 72 | } 73 | 74 | }); 75 | 76 | module.exports = eventsRouter; -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Node.js RESTful API Example 2 | 3 | An example about how to create a RESTful API using Express.js. 4 | The four CRUD operations are provided: create, read, update and delete records. 5 | This server keeps an array of JSON objects in memory and runs the CRUD operations on it. 6 | If the server is restarted everything returns to the initial configuration (12 event objects). 7 | 8 | 9 | ## Installation 10 | 11 | 1. Install Dependencies 12 | 13 | * [Node.js (version 6.x is recommended)](https://nodejs.org/en/) 14 | 15 | 3. Go to the project's root directory **cd /my/path/to/directory** 16 | 4. Run **npm install** 17 | 5. Start using it! **npm start** 18 | 19 | ## Available end-points 20 | 21 | ### GET /events 22 | 23 | Gets all the available events (12 sample events). 24 | 25 | ### GET /events/:id 26 | 27 | Obtains an event given its id. 28 | 29 | ### POST /events 30 | 31 | Creates an event (be sure you are sending the headers via your library). 32 | 33 | **Headers** 34 | 35 | Content-Type : application/json 36 | 37 | **Request body (raw)** 38 | 39 | ``` 40 | { 41 | "topics": "", 42 | "thumbnail": "/img/tr-3.jpeg", 43 | "url": "index.html", 44 | "overrideURL": "", 45 | "linkType": "", 46 | "title": "Created by Postman", 47 | "summary": "Lorem ipsum dolor sit amet" 48 | } 49 | ``` 50 | 51 | ### PUT /events/:id 52 | 53 | Updates an existing event. The JSON object must be passed in the request body as raw. It returns an error in case the event doesn't exist. 54 | 55 | **Headers** 56 | 57 | Content-Type : application/json 58 | 59 | **Request body (raw)** 60 | 61 | ``` 62 | { 63 | "id": "1", 64 | "topics": "", 65 | "thumbnail": "/img/tr-3.jpeg", 66 | "url": "index.html", 67 | "overrideURL": "", 68 | "linkType": "", 69 | "title": "Updated by Postman", 70 | "summary": "Lorem ipsum dolor sit amet" 71 | } 72 | ``` 73 | 74 | ### DELETE /events/:id 75 | 76 | Removes an event given its id. 77 | 78 | 79 | 80 | 81 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Read about how to use .gitignore: https://help.github.com/articles/ignoring-files 2 | # Improved by Alex Arriaga (@alex_arriaga_m) - http://www.alex-arriaga.com 3 | 4 | # Include your project-specific ignores in this section 5 | # ----- Project ignores 6 | 7 | bower_components 8 | node_modules 9 | .idea 10 | wcm 11 | client/tpl 12 | 13 | # ----- Operating Systems 14 | # OS X 15 | # https://github.com/github/gitignore/blob/master/Global/OSX.gitignore 16 | .DS_Store 17 | .AppleDouble 18 | .LSOverride 19 | # Icon must ends with two \r. 20 | Icon 21 | 22 | # Thumbnails 23 | ._* 24 | # Files that might appear on external disk 25 | .Spotlight-V100 26 | .Trashes 27 | 28 | 29 | # GNU/Linux 30 | # https://github.com/github/gitignore/blob/master/Global/Linux.gitignore 31 | *~ 32 | !.gitignore 33 | #*~ 34 | 35 | # KDE directory preferences 36 | .directory 37 | 38 | 39 | # Windows 40 | # https://github.com/github/gitignore/blob/master/Global/Windows.gitignore 41 | # Windows image file caches 42 | Thumbs.db 43 | ehthumbs.db 44 | 45 | # Folder config file 46 | Desktop.ini 47 | 48 | # Recycle Bin used on file shares 49 | $RECYCLE.BIN/ 50 | 51 | # Windows Installer files 52 | *.cab 53 | *.msi 54 | *.msm 55 | *.msp 56 | 57 | 58 | 59 | 60 | 61 | # ----- Other Control Version Systems 62 | # SVN 63 | # https://github.com/github/gitignore/blob/master/Global/SVN.gitignore 64 | .svn/ 65 | 66 | # CVS 67 | # https://github.com/github/gitignore/blob/master/Global/CVS.gitignore 68 | /CVS/* 69 | */CVS/* 70 | .cvsignore 71 | */.cvsignore 72 | 73 | 74 | 75 | 76 | # ----- IDEs and editors 77 | # VIM 78 | # https://github.com/github/gitignore/blob/master/Global/vim.gitignore 79 | [._]*.s[a-w][a-z] 80 | [._]s[a-w][a-z] 81 | *.un~ 82 | Session.vim 83 | .netrwhist 84 | # *~ 85 | 86 | 87 | # Sublime Text 88 | # https://github.com/github/gitignore/blob/master/Global/SublimeText.gitignore 89 | # workspace files are user-specific 90 | *.sublime-workspace 91 | 92 | # project files should be checked into the repository, unless a significant 93 | # proportion of contributors will probably not be using SublimeText 94 | # *.sublime-project 95 | 96 | 97 | # Notepad++ 98 | # https://github.com/github/gitignore/blob/master/Global/NotepadPP.gitignore 99 | # Notepad++ backups # 100 | *.bak 101 | 102 | 103 | # Eclipse 104 | # https://github.com/github/gitignore/blob/master/Global/Eclipse.gitignore 105 | *.pydevproject 106 | .metadata 107 | .gradle 108 | bin/ 109 | tmp/ 110 | *.tmp 111 | #*.bak 112 | *.swp 113 | *~.nib 114 | local.properties 115 | .settings/ 116 | .loadpath 117 | 118 | # External tool builders 119 | .externalToolBuilders/ 120 | 121 | # Locally stored "Eclipse launch configurations" 122 | *.launch 123 | 124 | # CDT-specific 125 | .cproject 126 | 127 | # PDT-specific 128 | .buildpath 129 | 130 | # sbteclipse plugin 131 | .target 132 | 133 | # TeXlipse plugin 134 | .texlipse 135 | 136 | 137 | # Netbeans 138 | # https://github.com/github/gitignore/blob/master/Global/NetBeans.gitignore 139 | nbproject/private/ 140 | build/ 141 | nbbuild/ 142 | dist/ 143 | nbdist/ 144 | nbactions.xml 145 | nb-configuration.xml 146 | 147 | 148 | # Xcode 149 | # https://github.com/github/gitignore/blob/master/Global/Xcode.gitignore 150 | # build/ 151 | *.pbxuser 152 | !default.pbxuser 153 | *.mode1v3 154 | !default.mode1v3 155 | *.mode2v3 156 | !default.mode2v3 157 | *.perspectivev3 158 | !default.perspectivev3 159 | xcuserdata 160 | *.xccheckout 161 | profile 162 | *.moved-aside 163 | DerivedData 164 | *.hmap 165 | *.ipa 166 | 167 | # IDEA 168 | .idea -------------------------------------------------------------------------------- /server/data/events-data.js: -------------------------------------------------------------------------------- 1 | var events = [{ 2 | "id": "1", 3 | "topics": "sports", 4 | "thumbnail": "/img/s-1.jpeg", 5 | "url": "index.html", 6 | "overrideURL": "", 7 | "linkType": "", 8 | "title": "College Basketball: Georgetown at Butler", 9 | "summary": "Georgetown at Butler. Georgetown's D'Vauntes Smith-Rivera squares off with Butler's Kellen Dunham in a battle of senior guards. The Hoyas took two of three meetings with the Bulldogs last season." 10 | }, { 11 | "id": "2", 12 | "topics": "", 13 | "thumbnail": "/img/b-2.jpeg", 14 | "url": "index.html", 15 | "overrideURL": "", 16 | "linkType": "", 17 | "title": "IBM Connect 2016", 18 | "summary": "Hear from executives and clients who will share their insights and experiences. Learn how to capitalize on the disruptive, fast-moving transformations like cloud, mobile, cognitive and analytics that are changing how we connect and collaborate." 19 | }, { 20 | "id": "3", 21 | "topics": "business", 22 | "thumbnail": "/img/b-1.jpeg", 23 | "url": "index.html", 24 | "overrideURL": "http://base22.com", 25 | "linkType": "external", 26 | "title": "WIRED Business Conference 2016", 27 | "summary": "On June 16, the WIRED Business Conference 2016 will take you beyond the usual tech-conference suspects. Our event is designed to introduce you to the true doers in the modern business universe. " 28 | }, { 29 | "id": "4", 30 | "topics": "sports", 31 | "thumbnail": "/img/s-2.jpeg", 32 | "url": "index.html", 33 | "overrideURL": "", 34 | "linkType": "", 35 | "title": "BASE Jumping", 36 | "summary": "is very extreme activity that includes a parachute (can be used both parachute and wingsuit) to jump from fixed objects, with unopened parachute like skydiving. The acronym “B.A.S.E.” stands for: Building, Antenna, Span, Earth – four categories of objects from which B.A.S.E. jumper can jump." 37 | }, { 38 | "id": "5", 39 | "topics": "", 40 | "thumbnail": "/img/tr-3.jpeg", 41 | "url": "index.html", 42 | "overrideURL": "", 43 | "linkType": "", 44 | "title": "Transport 1", 45 | "summary": "Lorem ipsum dolor sit amet" 46 | }, { 47 | "id": "6", 48 | "topics": "sports", 49 | "thumbnail": "/img/s-3.jpeg", 50 | "url": "index.html", 51 | "overrideURL": "", 52 | "linkType": "", 53 | "title": "2016 Olympic Trials", 54 | "summary": "Qualifying time standards for the 2016 Olympic Trials were announced Thursday, September 18, at 2 p.m. EDT, via a live webcast from the United States Aquatic Sports Convention in Jacksonville, Florida. It can be viewed via usaswimming.org/trials." 55 | }, { 56 | "id": "7", 57 | "topics": "business", 58 | "thumbnail": "/img/b-4.jpeg", 59 | "url": "index.html", 60 | "overrideURL": "", 61 | "linkType": "", 62 | "title": "Business 3", 63 | "summary": "Lorem ipsum dolor sit amet" 64 | }, { 65 | "id": "8", 66 | "topics": "technics", 67 | "thumbnail": "/img/t-5.jpeg", 68 | "url": "index.html", 69 | "overrideURL": "", 70 | "linkType": "", 71 | "title": "Tech 1", 72 | "summary": "Ut enim ad minim veniam" 73 | }, { 74 | "id": "9", 75 | "topics": "transport", 76 | "thumbnail": "/img/tr-1.jpeg", 77 | "url": "index.html", 78 | "overrideURL": "", 79 | "linkType": "", 80 | "title": "Autonomous Cars Silicon Valley 2016", 81 | "summary": "he Newest Tools, Technologies, and Techniques required for the Pursuit of the Autonomous Passenger Vehicle." 82 | }, { 83 | "id": "10", 84 | "topics": "technics", 85 | "thumbnail": "/img/t-2.jpeg", 86 | "url": "index.html", 87 | "overrideURL": "", 88 | "linkType": "", 89 | "title": "Tech 2", 90 | "summary": "Lorem ipsum dolor sit amet" 91 | }, { 92 | "id": "11", 93 | "topics": "fashion", 94 | "thumbnail": "/img/f-1.jpeg", 95 | "url": "index.html", 96 | "overrideURL": "", 97 | "linkType": "", 98 | "title": "Fashion Week 2016", 99 | "summary": "Fashion Week 2016 is coming 'round the bend!" 100 | }, { 101 | "id": "12", 102 | "topics": "transport", 103 | "thumbnail": "/img/tr-2.jpeg", 104 | "url": "index.html", 105 | "overrideURL": "", 106 | "linkType": "", 107 | "title": "Transport 3", 108 | "summary": "Lorem ipsum dolor sit amet" 109 | }]; 110 | 111 | module.exports = events; -------------------------------------------------------------------------------- /client/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | RESTful API Example with Node.js 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 22 | 23 |
24 |
25 |
26 | 27 |
28 | 29 |

Node.js RESTful API Example

30 |
31 |

An example about how to create a RESTful API using Express.js. 32 | The four CRUD operations are provided: create, read, update and delete records. This 33 | server keeps an array of JSON objects in memory and runs the CRUD operations on it. 34 | If the server is restarted everything returns to the initial configuration (12 event 35 | objects)

36 |
37 | 38 |

Installation

39 |
    40 |
  1. Install Dependencies
    2. 41 | 45 |
  2. Go to the project's root directory cd /my/path/to/directory
    3. 46 |
  3. Run npm install
    4. 47 |
  4. Start using it! npm start
    5. 48 |
49 | 50 |

Available end-points

51 |

GET /events

52 |

Gets all the available events (12 sample events). 53 |

54 |

Example: See the JSON result

55 | 56 |

GET /events/:id

57 |

Obtains an event given its id.

58 |

Example: See the JSON result

59 | 60 |

POST /events

61 |

Creates an event (be sure you are sending the headers via your library).

62 | 63 |

Headers

64 | 65 |

Content-Type : application/json

66 | 67 |

Request body (raw)

68 | 69 | 
{
 70 |     "topics": "",
 71 |     "thumbnail": "/img/tr-3.jpeg",
 72 |     "url": "index.html",
 73 |     "overrideURL": "",
 74 |     "linkType": "",
 75 |     "title": "Created by Postman",
 76 |     "summary": "Lorem ipsum dolor sit amet"
 77 | }
 78 |
79 | 80 |

PUT /events/:id

81 |

Updates an existing event. The JSON object must be passed in the request body as raw. It 82 | returns an error in case the event doesn't exist.

83 | 84 |

Headers

85 | 86 |

Content-Type : application/json

87 | 88 |

Request body (raw)

89 | 90 | 
{
 91 |     "id": "1",
 92 |     "topics": "",
 93 |     "thumbnail": "/img/tr-3.jpeg",
 94 |     "url": "index.html",
 95 |     "overrideURL": "",
 96 |     "linkType": "",
 97 |     "title": "Updated by Postman",
 98 |     "summary": "Lorem ipsum dolor sit amet"
 99 | }
100 |
101 | 102 |

DELETE /events/:id

103 |

Removes an event given its id.

104 |
105 | 106 |
107 |
108 |
109 | 110 | 111 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 138 | 139 | 140 | 141 | -------------------------------------------------------------------------------- /client/css/main.css: -------------------------------------------------------------------------------- 1 | /*! HTML5 Boilerplate v5.3.0 | MIT License | https://html5boilerplate.com/ */ 2 | 3 | /* 4 | * What follows is the result of much research on cross-browser styling. 5 | * Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal, 6 | * Kroc Camen, and the H5BP dev community and team. 7 | */ 8 | 9 | /* ========================================================================== 10 | Base styles: opinionated defaults 11 | ========================================================================== */ 12 | 13 | html { 14 | color: #222; 15 | font-size: 1em; 16 | line-height: 1.4; 17 | } 18 | 19 | /* 20 | * Remove text-shadow in selection highlight: 21 | * https://twitter.com/miketaylr/status/12228805301 22 | * 23 | * These selection rule sets have to be separate. 24 | * Customize the background color to match your design. 25 | */ 26 | 27 | ::-moz-selection { 28 | background: #b3d4fc; 29 | text-shadow: none; 30 | } 31 | 32 | ::selection { 33 | background: #b3d4fc; 34 | text-shadow: none; 35 | } 36 | 37 | /* 38 | * A better looking default horizontal rule 39 | */ 40 | 41 | hr { 42 | display: block; 43 | height: 1px; 44 | border: 0; 45 | border-top: 1px solid #ccc; 46 | margin: 1em 0; 47 | padding: 0; 48 | } 49 | 50 | /* 51 | * Remove the gap between audio, canvas, iframes, 52 | * images, videos and the bottom of their containers: 53 | * https://github.com/h5bp/html5-boilerplate/issues/440 54 | */ 55 | 56 | audio, 57 | canvas, 58 | iframe, 59 | img, 60 | svg, 61 | video { 62 | vertical-align: middle; 63 | } 64 | 65 | /* 66 | * Remove default fieldset styles. 67 | */ 68 | 69 | fieldset { 70 | border: 0; 71 | margin: 0; 72 | padding: 0; 73 | } 74 | 75 | /* 76 | * Allow only vertical resizing of textareas. 77 | */ 78 | 79 | textarea { 80 | resize: vertical; 81 | } 82 | 83 | /* ========================================================================== 84 | Browser Upgrade Prompt 85 | ========================================================================== */ 86 | 87 | .browserupgrade { 88 | margin: 0.2em 0; 89 | background: #ccc; 90 | color: #000; 91 | padding: 0.2em 0; 92 | } 93 | 94 | /* ========================================================================== 95 | Author's custom styles 96 | ========================================================================== */ 97 | 98 | 99 | 100 | .margin-top-lg { 101 | margin-top: 40px; 102 | } 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | /* ========================================================================== 117 | Helper classes 118 | ========================================================================== */ 119 | 120 | /* 121 | * Hide visually and from screen readers 122 | */ 123 | 124 | .hidden { 125 | display: none !important; 126 | } 127 | 128 | /* 129 | * Hide only visually, but have it available for screen readers: 130 | * http://snook.ca/archives/html_and_css/hiding-content-for-accessibility 131 | */ 132 | 133 | .visuallyhidden { 134 | border: 0; 135 | clip: rect(0 0 0 0); 136 | height: 1px; 137 | margin: -1px; 138 | overflow: hidden; 139 | padding: 0; 140 | position: absolute; 141 | width: 1px; 142 | } 143 | 144 | /* 145 | * Extends the .visuallyhidden class to allow the element 146 | * to be focusable when navigated to via the keyboard: 147 | * https://www.drupal.org/node/897638 148 | */ 149 | 150 | .visuallyhidden.focusable:active, 151 | .visuallyhidden.focusable:focus { 152 | clip: auto; 153 | height: auto; 154 | margin: 0; 155 | overflow: visible; 156 | position: static; 157 | width: auto; 158 | } 159 | 160 | /* 161 | * Hide visually and from screen readers, but maintain layout 162 | */ 163 | 164 | .invisible { 165 | visibility: hidden; 166 | } 167 | 168 | /* 169 | * Clearfix: contain floats 170 | * 171 | * For modern browsers 172 | * 1. The space content is one way to avoid an Opera bug when the 173 | * `contenteditable` attribute is included anywhere else in the document. 174 | * Otherwise it causes space to appear at the top and bottom of elements 175 | * that receive the `clearfix` class. 176 | * 2. 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