Features of React

Create a Simple React Component

Write a functional React component named 'Welcome' that accepts a 'user' prop and displays 'Welcome, [user]!' using JSX.

Expected output: A rendered greeting message showing the user's name.

Hint: Use a function that returns JSX with a dynamic expression inside curly braces.

Explain Virtual DOM Benefits

Write a short paragraph explaining how the virtual DOM improves React app performance.

Expected output: A clear explanation of virtual DOM's role in efficient rendering.

Hint: Focus on how React minimizes direct DOM updates.

The virtual DOM is a lightweight copy of the real DOM that React uses to optimize UI updates. It allows React to batch and minimize direct DOM manipulations, improving performance and user experience.

Unidirectional data flow means data flows in one direction, from parent to child components via props. This makes state management predictable and easier to debug.

JSX is a syntax extension that lets you write HTML-like code inside JavaScript. React uses JSX to describe UI components in a declarative and readable way.