What is ReactJS and why it is used?

ReactJS, commonly referred to as React, is an open-source JavaScript library developed and maintained by Facebook. It is primarily used for building user interfaces, especially for single-page applications where dynamic content updates are frequent.
Here are some key reasons why React is widely used in web development:

• Component-Based Architecture:

•Declarative Syntax

• Virtual DOM (Document Object Model)

• Efficient Updates

• Unidirectional Data Flow

• JSX (JavaScript XML)

• React Hooks

• Community and Ecosystem

• Compatibility with Other Libraries and Frameworks