What is the difference between useEffect and componentDidMount in React?

What is the difference between useEffect and componentDidMount in React?

useEffect is a hook that runs after every render, while componentDidMount runs only once after the component mounts.

Can you give me an example of when to use useEffect instead of componentDidMount?

Sure! Use useEffect for data fetching that needs to happen on updates, while componentDidMount is great for one-time setup.

Are there any performance implications of using useEffect?

Yes, if not managed properly, useEffect can lead to performance issues due to unnecessary re-renders.

How can I optimize useEffect to avoid performance issues?

You can optimize useEffect by specifying dependencies in the dependency array to control when it runs.