React bits, often called React components, are small, reusable pieces of code that make up a user interface (UI) in a React application. Think of them like LEGO blocks: each block (or component) has a specific role, like displaying a button, a navigation bar, or a product card. By combining these blocks, you build a complete website or app. React bits are written in JavaScript (or JSX), making it easy to create dynamic, interactive UIs.

Each component is independent, meaning it can manage its own data (state) and behavior. For example, a “Like” button component can track how many likes it has and update itself when clicked, without affecting other parts of the page. This modularity makes React apps easier to build, maintain, and scale.

In real-world scenarios, React bits shine. Imagine an e-commerce site: one component displays a product image, another shows the price, and a third handles the “Add to Cart” button. These components work together but can be reused across different pages, saving time and effort. Developers love React because it’s fast, flexible, and works well with other tools.

React bits also support props (short for properties), which let you pass data to components, making them customizable. For instance, a product card component can display different products based on the data passed to it.

Steps to Run a Simple React Component

Here’s how to create and run a basic React component with practical, beginner-friendly steps. We’ll build a simple “Greeting” component that displays a user’s name.

Step 1: Set Up Your Environment

1. Install Node.js: Download and install Node.js from nodejs.org. This gives you npm, a tool to manage React projects.
2. Create a React App: Open your terminal (Command Prompt on Windows, Terminal on Mac) and run:npx create-react-app my-app cd my-app This sets up a new React project called my-app.

Step 2: Create a Component

1. Open the Project: Use a code editor like VS Code and open the my-app folder.
2. Edit App.js: In the src folder, find App.js and replace its content with this simple component:

 import React from 'react';

function Greeting(props) { return

Hello, {props.name}!

; }



function App() { return (

); }



export default App;

 import React from 'react';

function Greeting(props) { return

Hello, {props.name}!

; }



function App() { return (

); }



export default App;