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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Intro to AngularJS ~ Girl Develop It</title>
<meta name="description" content="Girl Develop It Intro to Angular Class. Alexandra Hoefinger (@ahoef) developed and taught this workshop for GDI Philly">
<meta name="author" content="Girl Develop It">
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<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<!-- Opening -->
<section>
<img src="img/circle-gdi-logo.png" alt="GDI Logo" class="noborder"/>
<h1>Intro to AngularJS</h1>
</section>
<!-- Welcome-->
<section class="hide-pdf">
<h3>Welcome!</h3>
<div class = "left-align">
<p>Girl Develop It is here to provide affordable and accessible programs to learn software through mentorship and hands-on instruction.</p>
<p class ="green">Some "rules"</p>
<ul>
<li>We are here for you!</li>
<li>Every question is important</li>
<li>Help each other</li>
<li>Have fun</li>
</ul>
</div>
</section>
<section>
<h3>Agenda — Day 1</h3>
<!-- <p>This class will be a combo of lecture + exercises. It is 4 hours long, split over 2 days</p> -->
<ul>
<li>Introductions</li>
<li>Overview of MVC patterns</li>
<li>Overview of a basic Angular app</li>
<li>Built-in Directives and Expressions</li>
</ul>
</section>
<section>
<h3>Agenda — Day 2</h3>
<ul>
<li>Controllers & $scope</li>
<li>Dependency Injection</li>
<li>Beyond the Basics</li>
<li>Angular 2.0</li>
</ul>
</section>
<section>
<h3>Introductions</h3>
<div class = "left-align">
<p>Tell us about yourself.</p>
<ul>
<li>Who are you?</li>
<li>What do you hope to get out of the class?</li>
<li>Which of your web projects are you most proud of?</li>
</ul>
</div>
</section>
<section>
<h3>What is AngularJS?</h3>
<ul>
<li>A client-side JavaScript framework for extending HTML in small → large apps</li>
<li>Initially released in 2009 by Google</li>
<li>Used in production by Google, Virgin America, HBO, msnbc, Nike, Urban Outfitters, & more</li>
<li>Known for data-binding, directives, dependency injection, & more</li>
<li>Falls within the family of MV* frameworks, and is often compared to Ember.js, Backbone.js, & React</li>
</ul>
</section>
<section>
<h3>What is a MV* framework?</h3>
<ul>
<li>A variation of an MVC (Model View Controller)</li>
<li>Model — a type of data to model, like a user, account, photo, or note</li>
<li>View — the markup & templates for the UI</li>
<li>Controller — handles input & updates state of model</li>
<li>MVC, MVVM, MVVMCS, ...</li>
</ul>
</section>
<section>
<h3>What is a MV* framework?</h3>
<img src="img/500px-MVC-Process.png" alt="Model updates view, user sees view, user uses controller, controller manipulates model">
<p><small>Image Credit: <a href="http://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/MVC-Process.svg/500px-MVC-Process.svg.png" target="_blank">Wikimedia</a></small></p>
</section>
<section>
<h3>What is a MV* framework?</h3>
<ul>
<li>Main features are some combination of routing, data binding, templates/views, models & data access</li>
<li>Can be client- or server-side, and not specific to JavaScript</li>
</ul>
</section>
<section>
<h3>What type of MV* is Angular?</h3>
<ul>
<li>There's much debate on what exactly Angular is</li>
<li>Angular has evolved since release, and developers implement it differently</li>
<li>Many agree that it is an MVW (Model View Whatever)</li>
</ul>
</section>
<section>
<h3>Why Use Angular?</h3>
<ul>
<li>Easy to get up and running</li>
<li>Code organization</li>
<li>Speedy websites</li>
<li>Unit testing</li>
<li>Many, many resources</li>
</ul>
</section>
<section>
<h3>An example Angular App</h3>
<p>A basic <a href="demo-files/completed-exercises/todo-list/todo-list.html" target="_blank">todo list app</a></p>
<p>The <a href="demo-files/completed-exercises/todo-list/todo-list.txt" target="_blank">app's markup</a></p>
<br />
<ul>
<li>You'll notice {{ }} and attributes beginning with ng-</li>
<li>Those are the key components of an Angular View!</li>
</ul>
</section>
<section>
<h3>Including Angular</h3>
<p><a href="https://angularjs.org/">Download</a> and serve local file</p>
<pre><code><script src="js/angular.min.js"><script></code></pre>
<p>OR</p>
<p>Use a content distribution network for a cached file</p>
<pre><code><script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular.min.js"></script></code></pre>
</section>
<section>
<h3>Built-In Directives</h3>
<p>The Angular library looks for these attribute in your markup to know it should render Angular code</p>
<pre><code><body ng-app>
<h1>Hello World!</h1>
</body>
</code></pre>
<p><a href="https://docs.angularjs.org/api/ng/directive/ngApp">ng-app</a> is a required directive used to identify the root element and determine scope</p>
<!-- <small>(We'll cover what this code does shortly!)</small> -->
</section>
<section>
<h3>Expressions</h3>
<p>A way to insert data into html via a JavaScript string, number, object, or array</p>
<pre><code><body ng-app>
<p>I have {{ 1 + 2 }} apples</p>
<p>My cat's name is {{ "Admiral " + "Snuggles" }}</p>
</body></code></pre>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li><a href="demofiles.zip">Download the demo files</a></li>
<li>Open exercises/hello-world/hello-world.html in your text editor</li>
<li>Import the Angular library</li>
<li>Assign your root element with ng-app</li>
<li>Include html with a few string & number expressions </li>
</ul>
</section>
<section>
<h3>Two-Way Data Binding</h3>
<p>The <a href="https://docs.angularjs.org/api/ng/directive/ngModel" target="_blank">ng-model</a> directive binds the value of an <code>input</code>, <code>select</code>, or <code>textarea</code> to an object that can be used in an expression</p>
<pre><code><body ng-app>
<label>Name:</label>
<input type="text" ng-model="yourName">
<hr>
<h1>Hello {{yourName}}!</h1>
</body>
</code></pre>
</section>
<section>
<h3>Two-Way Data Binding</h3>
<p>Expressions can be inserted as the value html attributes as well as text within html tags</p>
<pre><code><body ng-app>
<label>Name:</label>
<input type="text" ng-model="user.status">
<hr>
<h1 class="status-text-{{user.status}}">Your status is: {{user.status}}!</h1>
</body>
</code></pre>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li>In hello-world.html, within your ng-app, add the markup for a form input field</li>
<li>Also add the markup for a heading
<li>Bind the value of the input to text within your heading tags by using ng-model </li>
<li>Try to add a few more data-bindings with ng-model!</li>
</ul>
</section>
<section>
<h3>More Built-In Directives: <br />ng-repeat</h3>
<p>ng-repeat is Angular's way of looping</p>
<pre><code class="xml"><body ng-app>
<ul>
<li ng-repeat="item in ['Sal', 'Jo', 'Amir', 'Maria']">
{{item}} is my friend.
</li>
</ul>
</body>
</code></pre>
</section>
<section>
<h3>More Built-In Directives: <br />ng-if</h3>
<p>ng-if is Angular's <code>if</code> statement</p>
<pre><code class="xml"><body ng-app>
<p ng-if="'Sal' === 'Sal'">True!</p>
<p ng-if="'Sal' === 'Jo'">False!</p>
</body>
</code></pre>
</section>
<section>
<h3>More Built-In Directives: <br />ng-show/ng-hide</h3>
<p><code>ng-show</code> & <code>ng-hide</code> toggle an element's display based on value</p>
<pre><code class="xml"><body ng-app>
<p ng-show="5> 2">Five is greater than two.</p>
<p ng-show="2> 5">Two is greater than five.</p>
</body>
</code></pre>
<small>Note: if the value of <code>ng-show</code> evaluates to false, the element will still live in the DOM</small>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li>In hello-world.html, within your ng-app, use ng-repeat to loop through an array of your favorite TV shows, and display each one on the page</li>
<li>Use ng-show/ng-hide or ng-if to conditionally display an image of your favorite celebrity</li>
</ul>
</section>
<section>
<h3>More Built-In Directives: <br />ng-init</h3>
<p><code>ng-init</code> sets an initial value</p>
<pre><code class="xml"><head>
<!-- add icon font library -->
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
</head>
<body ng-app>
<nav ng-init="isOpen=false" class="mobile-nav">
<button><i class="fa fa-bars"></i></button>
<ul ng-show="isOpen">
<li>Home</li>
<li>About</li>
<li>Blog</li>
</ul>
</nav>
</body>
</code></pre>
</section>
<section>
<h3>More Built-In Directives: <br />ng-click</h3>
<p>Angular's click listener</p>
<pre><code class="xml"><body ng-app>
<nav ng-init="isOpen = false" class="mobile-nav">
<button ng-click="isOpen = !isOpen">
<i class="fa fa-bars"></i>
</button>
<ul ng-show="isOpen">
<li>Home</li>
<li>About</li>
<li>Blog</li>
</ul>
</nav>
</body>
</code></pre>
<p><small><strong>Bonus!</strong> Angular will make your <code>ng-click</code> elements work with the keyboard too.</small></p>
</section>
<section>
<h3>More Built-In Directives: <br />ng-class</h3>
<p><code>ng-class</code> conditionally adds a class based on value</p>
<pre><code class="xml"><body ng-app>
<nav ng-init="isOpen = false" class="mobile-nav">
<p ng-class="{'highlight': isOpen}">My Menu</p>
<button ng-click="isOpen = !isOpen">
<i class="fa fa-bars"></i>
</button>
<ul ng-show="isOpen">
<li>Home</li>
<li>About</li>
<li>Blog</li>
</ul>
</nav>
</body>
</code></pre>
</section>
<section>
<h3>More Built-In Directives: <br />ng-class</h3>
<p>Here's another example:</p>
<pre><code class="xml"><body ng-app>
<nav ng-init="isOpen = false" class="mobile-nav">
<button ng-click="isOpen = !isOpen">
<i class="fa" ng-class="{
'fa-caret-square-o-down': !isOpen,
'fa-caret-square-o-up': isOpen}">
</i>
</button>
<ul ng-show="isOpen">
<li>Home</li>
<li>About</li>
<li>Blog</li>
</ul>
</nav>
</body>
</code></pre>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li>In hello-world.html, within your ng-app, add a new <code>section</code> or <code>div</code> where you set a value to true or false with <code>ng-init</code></li>
<li>Within that section/div, add a button with an <code>ng-click</code> directive that toggles the <code>ng-init</code> value</li>
<li>Use <code>ng-show</code> or <code>ng-hide</code> to show/hide an image of your pet (or your favorite animal) on click of your button </li>
</ul>
</section>
<section>
<h3>Note!</h3>
<p>It's good to know how ng-init works, but usually you'll use a controller for that purpose</p>
<p class="fragment">Before we talk about controllers, let's talk about modules!</p>
</section>
<section>
<h3>Modules</h3>
<ul>
<li>Where we write pieces of the app and define dependencies</li>
<li>Module names are bound to <code>ng-app</code> directives</li>
</ul>
<pre><code>(function(){
angular.module('myApp', []);
})();
</code></pre>
<pre><code class="xml"><body ng-app="myApp">
<p>I have {{ 1 + 2 }} apples</p>
<p>Our President is {{ "Barack " + "Obama" }}</p>
</body>
</code></pre>
</section>
<section>
<h3>Controllers</h3>
<ul>
<li>They're where most of the app's functionality comes from</li>
<li>They control the data that passes through</li>
<li>They're regular JavaScript Objects</li>
<li>There can be more than one controller in an app</li>
</ul>
</section>
<section>
<h3>Controllers</h3>
<small>in app.js</small>
<pre><code class="js">(function(){
angular
.module('myApp', [])
.controller('MainController', function(){
this.cat = cat;
});
var cat = {
name: 'Ms. Whiskers',
age: 9,
eyes: 'blue'
};
})();
</code></pre>
</section>
<section>
<h3>Controllers</h3>
<small>in index.html</small>
<pre><code class="xml"><body ng-app="myApp">
<section ng-controller="MainController as mainCtrl">
<p>My cat's name is {{mainCtrl.cat.name}}</p>
<p>She has {{mainCtrl.cat.eyes}} eyes and she's
{{mainCtrl.cat.age}} years old.</p>
</section>
</body>
</code></pre>
<small>The scope of the controller is only within the <code>section</code> element!</small>
</section>
<section>
<h3>Exercise — Part 1</h3>
<ul>
<li>In recipe-app/app.js, within the closure, create a module called 'recipeApp', a controller called 'RecipeController', and a variable called 'recipe'</li>
<li>Set the recipe var as an object with a few different properties, like 'name', 'ingredients', 'prepTime', 'cookTime', and 'directions'
<ul><li> Try to set one of these properties (like 'ingredients') as an array</li>
<li>Add two or three new properties as booleans, like 'isVegan', 'isGlutenFree', or 'isPaleo'</li></ul></li>
<li>Set the recipe object as a property of the controller, using the 'this' keyword</li>
</ul>
</section>
<section>
<h3>Exercise — Part 2</h3>
<ul>
<li>In recipe-app/index.html, add an <code>ng-app</code> directive with the value of "recipeApp", and an <code>ng-controller</code> directive with the value of "RecipeController as recipeCtrl"</li>
<li>Include a few expressions referencing properties of the recipe object</li>
<li>Use <code>ng-repeat</code> to iterate over one of your array properties in the recipe object</li>
<li>Use <code>ng-if</code> or <code>ng-show</code> to conditionally display your boolean properties</li>
</ul>
</section>
<section>
<h3>Controllers</h3>
<p>Often your data will be stored in an array, rather than a single object like we've seen so far</p>
<pre><code class="js">(function(){
angular
.module('myApp', [])
.controller('MainController', function(){
this.cats = cats;
});
var cats = [
{
name: 'Ms. Whiskers',
age: 9,
eyes: 'blue'
},
{
name: 'Melvin',
age: 1,
eyes: 'green'
},
{
name: 'Tootsie',
age: 3,
eyes: 'grey'
}
];
})();
</code></pre>
</section>
<section>
<h3>Controllers</h3>
<p>If your data is stored in an array, you'll need to loop through it or access specific items by index number</p>
<pre><code class="xml"><body ng-app="myApp">
<section ng-controller="MainController as mainCtrl">
<article ng-repeat="cat in mainCtrl.cats">
<p>My cat's name is {{cat.name}}</p>
<p>She has {{cat.eyes}} eyes and she's
{{cat.age}} years old.</p>
</article>
</section>
</body>
</code></pre>
</section>
<section>
<h3>Exercise — Part 3</h3>
<ul>
<li>In recipe-app/app.js, change your recipe object to an array of multiple objects and update the var name from 'recipe' to 'recipes'</li>
<li>In recipe-app/index.html, use <code>ng-repeat</code> to loop through your recipes array and display each one on the page</li>
</ul>
</section>
<section>
<h3>Controllers</h3>
<p>Functions can also be stored as properties</p>
<pre><code class="js">//app.js
angular
.module('todoApp', [])
.controller('TodoListController', function() {
var todoList = this;
todoList.todos = [
{text:'learn angular', done:true},
{text:'build an angular app', done:false}
];
todoList.logArg = function(arg) {
console.log(arg);
};
});
</code></pre>
</section>
<section>
<h3>Controllers</h3>
<p>And they can be called by events!</p>
<pre><code class="xml"><!-- index.html -->
<body ng-app="todoApp">
<section ng-controller="TodoListController as todoListCtrl">
<button ng-click="todoListCtrl.logArg('hi!')">
Log me!
</button>
</section>
</body>
</code></pre>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li>Let's look at the todo-list/todo.js & todo-list/todo-list.html</li>
<li>What are the functions in todo.js doing?</li>
<li>Which new directive in todo-list.html haven't we seen yet?</li>
</ul>
</section>
<section>
<h3>Dependency Injection</h3>
<ul>
<li>Dependencies are standalone modules that can be pulled into your project for different uses</li>
<li>They can be included as external files in script tags, or if you're using grunt/gulp, usually they can be included as node modules</li>
<li><a href="http://gregpike.net/demos/angular-local-storage/demo/demo.html">Angular Local Storage</a> is a popular module that uses the browser's local storage to persist your data without saving it to a database</li>
</ul>
</section>
<section>
<h3>Dependency Injection</h3>
<!-- <pre><code><script src="js/angular.localstorage.js"><script></code></pre> -->
<pre><code class="js">angular.module('todoApp', ['LocalStorageModule'])
.controller('TodoListController', function(localStorageService) {
var todoList = this;
// todoList.todos = [
// {text:'learn angular', done:true},
// {text:'build an angular app', done:false}];
var todosInStore = localStorageService.get('myTodos');
todoList.todos = todosInStore || [];
todoList.addTodo = function() {
todoList.todos.push({text:todoList.todoText, done:false});
localStorageService.set('myTodos', todoList.todos);
todoList.todoText = '';
};
[...]
});
</code></pre>
</section>
<section>
<h3>Exercise</h3>
<ul>
<li>Include a script tag in todo-list/todo-list.html to reference localstorage.js</li>
<li>In todo-list/todo.js, include <code>'LocalStorageModule'</code> as a dependency and <code>localStorageService</code> as an argument in your controller callback function </li>
<li>Set a var called <code>todosInStore</code> with the value of <code>localStorageService.get('myTodos')</code></li>
</ul>
</section>
<section>
<h3>Exercise...continued</h3>
<ul>
<li>Comment out the array of <code>todoList.todos</code>, and set <code>todoList.todos</code> to: <code>todosInStore || []</code></li>
<li>Within your <code>addTodo</code> function, before the line that sets an empty string, add a function to set local storage with the array of todos as its updated (<code>localStorageService.set('myTodos', todoList.todos);</code>)</li>
</ul>
</section>
<section>
<h3>$scope</h3>
<ul>
<li><a href="https://docs.angularjs.org/guide/scope">Angular scope</a> is an object that refers to the application model</li>
<li>In this workshop so far, we've been avoiding using <code>$scope</code> in favor of using <code>this</code> in our controllers to reference the application model</li>
<li>That's mainly because the <code>$scope</code> object is being phased out of Angular, and using <code>this</code> with <a href="http://toddmotto.com/digging-into-angulars-controller-as-syntax/">'controller as' syntax</a> is now considered best practice</li>
</ul>
</section>
<section>
<h3>$scope</h3>
<ul>
<li>That said, at this point, we do still need to use the <code>$scope</code> object if we want to use some of the cool Angular features that come with it</li>
<li>For example, <code>$watch</code> is an API that watches/listens for changes in user input, and can run callback functions when changes occur</li>
<li>We can use <code>$scope.$watch</code> to save our checked off todo list items to local storage</li>
</ul>
</section>
<section>
<h3>$scope.$watch</h3>
<pre><code>angular.module('todoApp', ['LocalStorageModule'])
.controller('TodoListController', function($scope, localStorageService) {
var todoList = this;
var todosInStore = localStorageService.get('myTodos');
todoList.todos = todosInStore || [];
$scope.$watch('todoList.todos', function () {
localStorageService.set('myTodos', todoList.todos);
}, true);
todoList.addTodo = function() {
todoList.todos.push({text:todoList.todoText, done:false});
//localStorageService.set('myTodos', todoList.todos);
todoList.todoText = '';
};
[...]
});
</code></pre>
</section>
<section>
<h3>From here onward...</h3>
<p>There are many more things you can do with Angular!</p>
<ul>
<li>Set up <a href="http://www.ng-newsletter.com/posts/directives.html">custom directives</a></li>
<li>Connect to external API's via <a href="https://docs.angularjs.org/api/ng/service/$http">$http</a></li>
<li>Store data in a <a href="http://adrianmejia.com/blog/2014/09/28/angularjs-tutorial-for-beginners-with-nodejs-expressjs-and-mongodb/">database</a></li>
</ul>
</section>
<section>
<h3>Angular 2.0</h3>
<ul>
<li>Sometime in 2016, Angular 2.0 will be released</li>
<li>It will be a rewrite largely based on ES6</li>
<li>The global <code>$scope</code> object & jqLite will be removed</li>
<li>The implementation of directives and controllers will change</li>
<li>But don't worry! The fundamentals you've learned in this workshop will live on!</li>
<li><a href="https://www.airpair.com/angularjs/posts/preparing-for-the-future-of-angularjs">Preparing for the Future of AngularJS</a></li>
</ul>
</section>
<section>
<h3>Next Steps</h3>
<ul>
<li>Read Up!
<ul>
<li><a href="http://www.smashingmagazine.com/2012/07/27/journey-through-the-javascript-mvc-jungle/">Journey Through the JavaScript MVC Jungle</a></li>
<li><a href="http://todomvc.com/">todomvc.com</a></li>
<li><a href="https://www.ng-book.com/">ng-book: The Complete Book on AngularJS</a></li>
<li><a href="http://www.ng-newsletter.com/">ng-newsletter</a></li>
</ul>
</li>
<li>Practice!
<ul><li><a href="http://www.codecademy.com/learn/learn-angularjs">Codeacademy AngularJS Course</a></li>
<li><a href="http://teamtreehouse.com/library/angularjs">Treehouse AngularJS Course</a></li>
<li><a href="https://www.codeschool.com/paths/javascript">Beginner & Intermediate AngularJS Course on CodeSchool</a></li>
<li><a href="http://www.cheatography.com/proloser/cheat-sheets/angularjs/">AngularJS Cheatsheet</a></li></ul>
</li>
</ul>
</section>
<section>
<h3>Next Steps</h3>
<ul>
<li>Build Something!
<ul><li>FAQ list, gallery, quiz, calculator, or whatever else you can cook up!</li></ul>
</li>
</ul>
</section>
<section>
<h2>Questions?</h2>
<div style="font-size:1200%; height:100%; margin-top:30%">?
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