Angular is the popular enterprise framework that many developers are using to build and maintain complex web applications. Angular’s popularity is immense, and companies using it are as diverse as Domino’s Pizza, Ryanair, iTunes Connect, PayPal Checkout, Google. Angular is an open source framework supported by Google. Angular describes itself as an extension to HTML for building complex web apps. Also if you’re familiar with TypeScript, that’s how Angular 2 was written.