Backend Engineering, Frontend Engineering
Senior
programming
In React, what is the purpose of the useEffect hook?
A) To handle side effects in functional components.
B) To manage component state.
C) To optimize performance.
D) To pass props to child components.
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## Approach
The useEffect hook is specifically designed for handling side effects in functional components, allowing developers to perform operations such as data fetching, subscriptions, or manually changing the DOM.
## Complexity
**Time:** O(...) (depends on the operations inside useEffect)
**Space:** O(...) (depends on what you store in the component)
## Trade-offs
- Allows cleaner code with functional components but requires understanding of cleanup functions and dependencies.
```
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