Introduction to React JS

ReactJS (or simply React) is an open-source JavaScript library that helps build user interfaces or UI components. React is just a library, unlike detailed frameworks such as Angular or Ember. This difference matters because React focuses on one thing helping you build component based user interfaces while letting you make other architectural choices.

Features of React JS

The features of the React JS include:

• JSX: A syntax extension for JavaScript that lets you write HTML-like code within React components.
• Component: A component in React is a reusable piece of UI that can be either a function or a class.
• React Hooks: Functions that let you use state and other React features in functional components.
• Props & State: Props are inputs passed to components, while state is managed within the component to handle dynamic data.
• Virtual DOM: It is a lightweight representation of the real DOM that React uses to efficiently update the UI.