Angular js

Abdhesh [email protected]

Initial release 2009

1. What is AngularJs?

2. Key Points

3. Core Features of AngularJS

4. How is it works?

5. AngularJs Terminologies

6. AngularJs directives

7. How we start work on AngularJs?

8. AngularJs Tags

9. How we use Yeoman?

10. Advantages and Disadvantages

Agenda

What is Angular?

AngularJS is an open-source JavaScript framework,

maintained by Google, that assists with running single-page

applications. Its goal is to augment browser-based applications

with model–view–controller (MVC) capability, in an effort to

make both development and testing easier.

Key points of AngularJs1. AngularJS is a client-side JavaScript framework used tomake single-page web applications It means the browser only loads the page once, but then makes asynchronous calls to the server to fetch new information

2. It helps you build front-ends for web-based applications

3. Makes creating a user interface (UI) easier through data-binding

4. It helps organize and architect an application means it is prescribing a way for you to divide your application up into smaller parts.

5. It runs in the web browser.

Core Features of AngularJS

1. Two Way Data-binding

Core Features of AngularJS ...

2. Model View Controller MVC is a pattern for dividing an application into different parts (called Model, View,

and Controller), each with distinct responsibilities.


3 .HTML Templates Deep Linking

Static HTML Dynamic Data

Final HTML


4 .Deep Linking Deep linking allows you to encode the state of the application in the URL so that it can be bookmarked and the application can be restored from the URL to the same state.

5 .Dependency Injection Directives

How is it works?

How is it works? ...1. The browser loads the HTML and parses it into a DOM

2. The browser loads angular.js script

3. Angular waits for DOMContentLoaded event

4. Angular looks for ng-app directive, which designates the application boundary

5. The Module specified in ng-app (if any) is used to configure the $injector

6. The $injector is used to create the $compile service as well as $rootScope

7. The $compile service is used to compile the DOM and link it with $rootScope

8. The ng-init directive assigns World to the name property on the scope

9. The {{name}} interpolates the expression to Hello World!

AngularJs Terminologies

1. Controller 1.1 Controller is the code behind the view. 1.2 Construct the model and publish it to the view along with callback methods.

AngularJs Terminologies ...

2. Model The model is the data which is used merged with the template to produce the view.


3. View The view is what the users sees. The view begins its life as a template, it is merged with the model and finally rendered into the browser DOM.


4. Scope The scope is responsible for detecting changes to the model section and provides the execution context for expressions.

5. Directives A directive is a behavior or DOM transformation which is triggered by the presence of a custom attribute, element name, or a class name.

6. Filters Filters perform data transformation. Typically they are used in conjunction with the locale to format the data in locale specific output.

AngularJs directivesng-app Declares an element as a root element of the application allowing behavior to be modified through custom HTML tags.ng-bind Automatically changes the text of a HTML element to the value of a given expression.ng-model Similar to ng-bind, but allows two-way data binding between the view and the scope.ng-class Allows class attributes to be dynamically loaded.ng-controller Specifies a JavaScript controller class that evaluates HTML expressions.ng-repeat Instantiate an element once per item from a collection.ng-show & ng-hide Conditionally show or hide an element, depending on the value of a boolean expression.ng-switch Conditionally instantiate one template from a set of choices, depending on the value of a selection

expression.ng-view The base directive responsible for handling routes that resolve JSON before rendering templates driven by

specified controllers.ng-if Basic if statement directive which allow to show the following element if the conditions are true.

How to use AngularJs1. Include AngularJs Library<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.1/angular.min.js

"></script>

2. Create AngularJs Application<html ng-app></html>Or<html ng-app=”demoApp”></html>Or<div ng-app></div>Or<div ng-app=”demoApp”></div>

3. Define Controller: <div ng-controller="Ctrl"><input type="text" ng-model="message"></div>

4. Implementation of Controller Function Ctrl($scope){ $scope.message=”Hello.Please Enter your name”; }

https://ajax.googleapis.com/ajax/libs/angularjs/1.0.1/angular.min.js

AngularJs TagsBinding: 1. <span ng-bind="{expression}"></span> Ex.<span ng-bind="message"></span> 2. <p>{{message}}</p>

Looping: 1. <ul> <li ng-repeat="thing in awesomeThings">{{thing}}</li> </ul>

Include Template: <div ng-view=”_template.html”></div>

How we begin?We need a development setup e.g. - Server

Task Runner

Test Runner

CoffeeScript / SASS transpiler

Dependency Management

Yeoman Yo is used to generate things, from other generators to files and more.

Grunt is used for task management such as building, previewing and testing.

Bower: is used for dependency management, downloading and installing .js components.

How we use Yeoman?...Yeoman Yo : Scaffolding Tool

Grunt: Task Runner

Bower: Package Manager

Steps to create app1.Installing Yeoman

To install yo, grunt, and bower, execute the following command:

$ npm install -g yo grunt-cli bower

2.Installing Generators

$npm install -g generator-angular

3.Creating the project

$ mkdir knolx-angularjs && cd knolx-angularjs

Now we are ready to use the available generators to build our application:

angular:app, angular:controller, angular:directive,angular:filter,angular:route

angular:service,angular:view

4.Creating application structure

$ yo angular:app knolxAngularApp

Steps to create app..

Steps to create app..5.Running the project

To start the local web server run the following command:

$grunt server

6.Testing the project Grunt takes care of running all of your tests using Karma, so execute the following command:

$ grunt test

7.Building the Project

7.1 .Concatenates all your JS into one file.

7.2 Versions all your files.

7.3 Optimizes all images and HTML templates.

7.4 Concatenates all your CSS into one file.

7.5 Generates Application Cache manifest file.

7.6 Building your application is easy – just run the following command:

$ grunt build

AdvantagesSuper fast development

Makes developing SPA easy

Awesome performance

Make apps scalable

Data-binding and automatic DOM manipulation

XHR/JSONP

DisadvantagesGood for IO driven apps only (not games)

SEO?

References

http://docs.angularjs.org

Thank you

Angular js

Technology

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