What are the dependencies of the useEffect hook in React?

Can you explain how the dependencies array works in the useEffect hook?

Sure! The dependencies array in the useEffect hook determines when the effect runs. If you pass an empty array, the effect runs only once after the initial render.

What happens if I include variables in the dependencies array?

If you include variables, the effect will re-run whenever those variables change. This is useful for responding to state updates.

Can I use functions in the dependencies array?

Yes, but be cautious! If the function is recreated on every render, it can cause the effect to run more often than expected.

What are some common mistakes to avoid with useEffect dependencies?

Common mistakes include omitting dependencies that are used inside the effect or including unnecessary ones, which can lead to performance issues.