AngularJS is a JavaScript-based open-source front-end web application framework developed and maintained by Google. AngularJS is the front end part of the MEAN stack, consisting of MongoDB database, Express.js web application server framework.

AngularJS framework adapts and extends traditional HTML to present dynamic content through two-way data-binding that allows for the automatic synchronization of models and views. As a result, AngularJS de-emphasizes explicit DOM manipulation with the goal of improving testability and performance.