Many of us changed from class components to functional components while using Reactjs because functional components are more efficient to write as less number of lines are needed to achieve the same class component, Here will see how to implement the componentDidMount and componentWillUnmount using React functional component.

Here most of the lifecycle of React is achieved through a hook called useEffect, we are going to use the same to achieve our target.

Here whatever logic inside the useEffect but outside of the return statement will perform componentDidMount. Whatever the logic present inside the return will perform same way that the componentWillUnmount do.

In the same way, we can replace almost all the class component functionalities with the functional component.

Happy learning...