Hi everyone in this article I’m explaining about AngularJs. What is angularjs and why we use angularjs.
What is Angularjs?
AngularJS is an open source web application framework. It was originally developed in 2009 by Misko Hevery and Adam Abrons. It is now maintained by Google. Its latest version is 1.3.14.
Angularjs is a structural framework for dynamic web application. It lets you use HTML as your template language and lets you extend HTML’s syntax to express your applications components clearly and succinctly. Angular’s data binding and dependency injection eliminate much of the code you currently have to write and it all happens within the browser, making it an ideal partner with any server technology.
Internet Application (RIA).
2. Angularjs provides developers options to write client side application (Using
3. Application written in angularjs is cross-browser compliant. Angularjs
4. Angularjs is open source, completely free and used by thousands of
developers around the world it is licensed under the apache license version 2.0.
Data-Binding: It is the automatic synchronization of data between model and view
Scope: These are object that refer to the model. They act as a glue between
controller and view.
Services: Angularjs come with several built-in services for example $http to make
an XMLHttpRequest. These are singleton object which are instantiated only once in
Filters: These select a subset of items from an array and returns a new array.
Directives: Directives are markers on DOM elements (such as elements, attributes,
css etc). These can be used to create Custom HTML tag that serve as new, custom
widgets. Angularjs has built-in directives (ngBind, ngModel…).
Templates: These are the rendered view with information from the controller and
model. These can be a single file (like index.html) or multiple views in one page
Routing: It is concept of switching views.
Model View Whatever: MVC is a design pattern for dividing an application into different parts (called Model, View and Controller), each with distinct responsibilities. AngularJS does not implement MVC in the traditional sense, but rather something closer to MVVM (Model-View-ViewModel). The Angular JS team refers it humorously as Model View Whatever.
Deep Linking: Deep linking allows you to encode the state of application in the URL so that it can be bookmarked. The application can then be restored from the URL to the same state.
Dependency Injection: Angularjs has built-in dependency injection subsystem that helps the developer by making the application easier to develop, understand and test.
Following diagram depicts some important parts of AngularJS which we will discuss in detail in the subsequent chapters.
Advantage of Angularjs:
1. Angularjs provides capability to create single page application in a very clean
and maintainable way.
2. Angularjs provide data binding capability to HTML thus giving user a rich and
3. Angularjs code is unit testable.
4. AngularJS uses dependency injection and make use of separation of concerns.
5. AngularJS provides reusable components.
6. With AngularJS, developer write less code and get more functionality.
do the business processing.
Disadvantages of AngulaJS:
Though AngularJS comes with lots of plus points but same time we should
consider the following points:
not safe. Server side authentication and authorization is must to keep an
the basic page and nothing more.
The AngularJS Components:
The AngularJS framework can be divided into following three major parts:
ng-app : This directive defines and links an AngularJS application to HTML.
ng-model : This directive binds the values of AngularJS application data to HTML input controls.
ng-bind : This directive bins the AngularJS Application data to HTML tags.