What are React components, and what are the two types of components?

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What are React Components?

React components are the building blocks of a React application. They are independent, reusable pieces of UI that define how a certain part of the interface should look and behave.

• Think of them like LEGO blocks — you can build complex UIs by combining smaller, reusable components.

• Each component can have its own logic, state, and rendering, making applications modular and easier to manage.

Two Main Types of React Components

1. Class Components (Traditional)

• Defined using ES6 classes.

• Can manage their own state and have access to lifecycle methods (componentDidMount, componentDidUpdate, componentWillUnmount, etc.).

• More verbose and were widely used before React Hooks were introduced.

• Example: Good for complex logic and lifecycle handling.

2. Functional Components (Modern & Recommended)

• Defined as JavaScript functions that return JSX.

• Initially “stateless,” but with the introduction of React Hooks (useState, useEffect, useContext, etc.), they can now handle state and side effects.

• Simpler, cleaner, and more widely used in modern React development.

• Preferred in most new projects for better readability and performance.

✅ In summary:

• Class Components → Older, use classes, lifecycle methods, more verbose.

• Functional Components → Modern, lightweight, use hooks for state and side effects, now the standard choice in React.

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