The main agenda of Angular JS is to expand the application which is based on a browser with the help of Model-View-Controller (MVC). It reduces the amount of JavaScript amount which are required to make the functions of web applications. These kinds of applications are also termed as Single-Page Applications.

1. What are Controllers in Angular JS?
Overview of Angular JS
Angular JS is a JavaScript framework which is used to enlarge the applications based on the browser
usingModel ViewController(MVC).Since AngularJSisa free frameworkallowingthe usersto use HTML
as a template language that creates rich applications of the internet and it give developers client-side
applications.
Trending features of Angular JS
Listed below are some of the trendiest features of Angular JS.
Routing
Dependency Injection
Productivity
Directives
Deep Linking
Speed & Performance
Codeless
Architecture
Data Binding
Not Browser Specific
What are the advantages of Angular JS?

2. The code of Angular JS is unit testable and components offered by Angular JS are completely
reusable.
In orderto make the use of separationconcernsAngularJStake the help of dependency injections.
It also gives the data binding capability to HTML and is capable of developing the Single Page
Application (SPA) in a very tidy way which is easy to maintain.
Angular JS- Controllers

3. Controllers are nothing but objects of JavaScript containing the application logic and if compared
then controllers of Angular JS are considered special.
Applicationlogiciswritteninthe formof JavaScriptwhichistermedas‘Controllers’and most of the
time it is available in the form of ‘Angular Module’.
AngularJSis responsible forsendinganytype of datato its viewers andthisisdone whenAngular JS
attached itself with the DOMelement by using the attribute of ‘NG-Controllers’.
Any attribute starting with ‘NG’ is known as ‘Directive’ and to perform in a better way every
controller needs to start with ‘Instantiated’.
Wheninstantiationis done the data which is the ‘Model’ is exposed which has been consumed by
the ‘Views’.
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