One of the most notable benefits of this framework is that it isn’t reliant upon a particular back end. It only accords with the API interface, so AngularJS operates as long as the API manages its data requests suitably. Developers can, consequently, improve an application’s backend quickly without changing the front end. This feature is particularly advantageous when creating a mobile app for an existing website.
Facebook released ReactJS in 2013 and already is in serious competition with AngularJS; however, ReactJS is a pretty much favorite choice of developers. For both Facebook and Instagram, ReactJS powers the UI, so the apps are large and dynamic. It acts as the View component of the MVC – model-view-controller architecture.
ReactJS enables the developers to create a virtual DOM – Document Object Module, providing the client and server sides to interact more promptly. This feature is most beneficial for applications that need a robust MVC View component without complicating Model and Controller parts. ReactJS is also useful for the apps that require a View component for another front-end framework. Further, the benefits of ReactJS resolves some serious issues of SEO – Search Engine Optimization.
Distributed under the MIT License, Express.js is open-source software, which usually means that it’s free to use and develop.