React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.

Declarative views make your code more predictable and easier to debug.
React is a frontend library, which runs in the browser. Since React and Angular are purely client-side libraries made up of JavaScript files, any old HTTP server can send them to users – PHP inside Apache, PHP inside Nginx, plain Apache/Nginx, Java Tomcat, Rails inside Passenger, and yes, Node. js.

React JS is an open-source, component-based Javascript library, which is used to build UI specifically for single-page applications. Javascript is a programming language used to create dynamic elements on the website or web app. ... Almost all modern browsers support Javascript.

Today, there are over 220,000 live websites using React. Not only that, but industry giants like Apple, Netflix, Paypal, and many others have also already started using React JS in their software productions.

With so many companies using React JS including some of the top brands in the whole world, React must be offering some extraordinary benefits, right?

Of course, it does.

The better question is…

What are the key benefits of React JS that encouraged so many businesses and popular brands to use it?