AngularJs Directives
A core feature of AngularJS, directives are attributes that allow you to invent new HTML syntax, specific to your application. They are essentially functions that execute when the Angular compiler finds them in the DOM. Some of the most commonly used directives are ng-app,ng-controller and ng-repeat.
The different types of directives are:
Element directives
Attribute directives
CSS class directives
Comment directives
