What is ReactJs and Why to use it? | Introduction with ReactJs For Beginners

React is an open source JavaScript library for building user interfaces.

Why is ReactJs popular?

Let's start with the fact that React is a project created and maintained by Facebook.

when a company like Facebook uses React in its own products and invests money and resources to keep the project alive you can be rest assured it is not going to die down anytime soon.
React has a component based architecture.

This lets you break down your application into small encapsulated parts which can then be composed to make more complex UIs.

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