AL-Mut'az Bellah SalahatSenior Software Engineer

TechTalkAmma/Jordan 

v1.3

I play JavaScript Everywhere

You can find me here :@msalahathttp://github.com/msalahathttp://fb.me/msalahat

Agenda• Why we need a modern JS Framework ?

• What is SPA ( Single Page Application )

• What is AngularJS?

• Why Angular is Awesome?

• 2 way data binding

• directives

• Filters

• Views

• Providers

• Routing

Examples of this presentation can be found here :

http://bit.ly/angularjs-tutorial

Why we need a modern JS Framework

• Build more complex web apps

• Enhance User Experience

• Make apps faster.

• Make JS code well structured and maintainable.

• Create SPA.

What is SPA ( Single Page Application ) ?

It's a web application or web site that fits on a single web page with the goal of providing a more fluid user experience akin to a desktop application.

SPA Challenges

• Navigation and back button

• Google analytics

• HTML templates

• Code structure

• JavaScript and HTML interaction

What is AngularJS ?

• It's an MVC [or MVW as the creators like to name it ] JS Framework that let's you build a super awesome singe page applications with minimum effort, solving all challenges mentioned before.

• You can use angular without any 3rd Party libs.

• Easy to learn.

• Let you built loosely coupled components.

AngularJS App Structure

Why Angular is Awesome?

Two way data binding

Regular Way

Angular Way

• AngularJS expressions are written inside double braces: {{ expression }}.

• AngularJS expressions binds data to HTML.

• AngularJS will "output" data exactly where the expression is written.

• AngularJS expressions are much like JavaScript expressions: They can contain literals, operators, and variables.

Expressions

• Let’s build a character / word counter tool

They are one of the most powerful feature of AngularJS. They allow you to extend HTML to answer the needs of web applications. Directives let you specify how your page should be structured for the data available in a given scope.

Directives

ng-show

ng-class

ng-repeat

Filters• Filters are used to manipulate, transform or format data to be

viewed

• Filters can be used inside expressions or directives using a pipe.

• Angular has built in list of filters :

• uppercase

• lowercase

• currency

• orderBy

• filter

Controller

• In AngularJS, the controller is where the behavior of your application is located.

• DOM manipulation should not be done inside a controller.

$scope

• $scope is used to link the controllers and the views to which they are binded. A controller can add data and function in its scope and then they will be accessible in the view.

$rootScope

• Its the parent of all $scope(s), its models are accessible by all controllers,

• Any controller can get/set them.

• $scope models overrides $rootScope modes.

Provider

• It is a the piece of code you want to separate of controllers and want o re use it into another controllers , you can create a provider using 3 recipes:

• Factory

• Service

• Provider

Dependency Injection

Dependency Injection is a software design pattern in which an object is given its dependencies, rather than the object creating them itself. It is about removing the hard-coded dependencies and making it possible to change them whenever needed.

3 ways to specify dependences

3 ways to specify dependences

$routesProvider

• Using the route provider, we can configure the routes [ paths ] available in our application.

• When using the router provider you do not need to define controllers inside html using ng-controller.

• You only need to specify the element that Angular will display templates in using ng-view.

• Each controller is assigned to a template.

• Each controller has a specific path after the # sting in the URL