AngularJS is a structural framework for dynamic web apps. It lets you use HTML as your template language and lets you extend HTML's syntax to express your application's components clearly and succinctly. AngularJS's data binding and dependency injection eliminate much of the code you would otherwise have to write. 

AngularJS is a client-side JavaScript MVC framework to develop a dynamic web application. AngularJS was originally started as a project in Google but now, it is an open-source framework. AngularJS is entirely based on HTML and JavaScript, so there is no need to learn another syntax or language.