How can I optimize performance using useEffect in React?

How can I optimize performance using useEffect in React?

You can optimize performance in React by using the dependency array in useEffect to control when the effect runs.

What should I include in the dependency array?

Include any state or props that your effect depends on. If you leave it empty, the effect runs only once after the initial render.

Are there any common pitfalls to avoid?

Yes, avoid including unnecessary dependencies that can cause the effect to run more often than needed, leading to performance issues.

Can you give an example of a performance optimization?

Sure! If you're fetching data, you can use a flag in the dependency array to prevent multiple fetches on re-renders.