React UseEffect Hook vs ComponentDidMount

What's the difference between the useEffect hook and ComponentDidMount in React?

The useEffect hook is a more versatile way to handle side effects in functional components, while ComponentDidMount is a lifecycle method used in class components to run code after the component mounts.

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

Sure! Use useEffect when you need to perform side effects based on state or prop changes, not just on mount. For example, fetching data when a prop changes.

Are there any performance implications when using useEffect?

Yes, if not managed properly, useEffect can lead to performance issues, especially if it triggers unnecessary re-renders. It's important to specify dependencies correctly.

Is it possible to replicate ComponentDidMount behavior using useEffect?

Absolutely! You can replicate ComponentDidMount by using useEffect with an empty dependency array, which runs the effect only once after the initial render.