Key Differences Between React.js Class Components and Functional Components

React.js offers two main types of components: class components and functional components. Here are the key differences between them:

• State Management: Class components have access to state, while functional components do not. State management in functional components is achieved using hooks such as useState and useEffect.
• Lifecycle Methods: Class components have lifecycle methods such as componentDidMount, componentDidUpdate, and componentWillUnmount, while functional components use hooks like useEffect to perform similar tasks.
• Syntax: Class components use ES6 class syntax, while functional components are written as simple functions. Functional components are easier to read and maintain.
• Performance: In general, functional components are more lightweight and perform better than class components due to their simpler structure.

Understanding the differences between class components and functional components will help you choose the right type of component for your React.js applications.