What is React?

React is a declarative, efficient, and flexible JavaScript library for building user interfaces. It lets you compose complex UIs from small and isolated pieces of code called "components".

Setting Up a React Project

To get started, you'll need Node.js installed. Use Create React App for a quick setup:

npx create-react-app my-app
  cd my-app
  npm start

Understanding Components

Components are the building blocks of React applications. They can be functional or class-based. Here's a simple example:

function Welcome(props) {
    return 
Hello, {props.name}!
;
  }

Props and State

Props allow you to pass data to components, while state manages data that can change over time. This separation makes your code more predictable and easier to debug.

In this guide, we've covered the fundamentals of React. As you build more complex applications, you'll appreciate React's component-based architecture and virtual DOM for efficient rendering.