AngularJS

What is Angular ?

AngularJS is a JavaScript library which is used for Single Page Application. It is a open source and cost free, It extends HTML with new attributes.

Note:-

• 1) AngularJS is an open source web application framework.
• 2) latest version is 1.3.14.
• 3) Originally developed in 2009 by Misko Hevery and Adam Abrons.
• 4) Now maintained by Google.
• 5) Its provides options to write client side application in MVC way.
• 6) It is licensed under the Apache License version 2.0.

Below are important core features of AngularJS:

Scope : These are object that refer to model. they are work like GLUE between controller and view,

Data-binding : It automatically synchronizes AngularJS expressions with AngularJS data.

Controller: All AngularJS applications are controlled by controllers. These are Javascript functions that are bound to a particular scope.
ng-controller directive defines the application controller.

Filters : These select a subset of items from an array and returns a new array. It can be added to expressions and directives using a pipe character.
Example:-
Filter -> Description
currency -> Format a number to a currency format.
filter -> Select a subset of items from an array.
lowercase -> Format a string to lowercase.
orderBy -> Orders an array by an expression.
uppercase -> Format a string to upper case.

Directives : It is an important part of angularJS. Directives are extended HTML attributes with the prefix ng-.

• ng-app - initializes an AngularJS application. It can be only one in an app.
• ng-init - initializes application data.
• ng-model - Its work like a variable. Its binds the value of HTML controls (input, select, textarea) to application data.

Expression :

• 1) Expression are used to bind application data to HTML.
• 2) Expression are written inside duble curly braces {{Expression}}.,
• 3) Angular JS Expression are pure JS exprission & Output the data where they are used