Angular is an event-driven JavasScript framework. AngularJS uses the concepts of the Model-View-Controller (MVC) pattern to develop single-page applications. AngularJS is a framework agnostic, which can be used in combination with another framework like Backbone or Knockout. AngularJS receives the model-view-controller (MVC) pattern. AngularJS also exposes a lightweight scope object that is injectable into any JavaScript constructor. AngularJS applications are primarily built with HTML (or HAML files) and CSS (or SASS files) and they are almost impossible to debug via the browser’s console. The application is built with the JavaScript files that are written in the TypeScript language. The event-driven programming model provided by AngularJS allows the developer to initialize, modify and run the code for any element in the HTML document.