QWhat is AngularJS?

AngularJS is an open-source front-end JavaScript framework primarily maintained by Google and a community of individuals and corporations. It was designed to address the challenges of developing single-page applications (SPAs) by extending HTML's syntax to better express your application's components. At its core, AngularJS aims to simplify both the development and testing of web applications by providing a structured framework for building client-side applications. It implements the Model-View-Controller (MVC) or Model-View-ViewModel (MVVM) architectural pattern, allowing developers to separate application logic from the user interface. Key features include two-way data binding, which automatically synchronizes data between the model and the view; dependency injection, which helps manage and provide dependencies to components; directives, which extend HTML with new attributes and elements; and services, which are singletons that carry out specific tasks. While it uses JavaScript, AngularJS itself is not a programming language; rather, it is a collection of pre-written JavaScript code that provides a structure and tools to build applications more efficiently. It is also not a database, which is used for storing data, nor is it a server, which hosts applications and serves them to clients. Instead, it provides the tools and structure for building the client-side part of a web application that runs in a user's web browser.