Key Differences between Class Components and Functional Components in ReactJS

Class Components:

• Class components are ES6 classes that extend from React.Component and have their own lifecycle methods.
• They have a more complex syntax and involve the use of this keyword to access props and state.
• State management is handled differently in class components using setState method.
• Class components can have state, whereas functional components cannot have state until the introduction of hooks.

Functional Components:

• Functional components are simple functions that take props as input and return JSX.
• They do not have their own state or lifecycle methods, but can use hooks to manage state and side effects.
• Functional components are more lightweight and easier to read compared to class components.
• With the introduction of hooks, functional components can now have state and access to lifecycle methods.