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What is the purpose of the useEffect hook in React? a. To manage component state b. To create reusable logic in functional components c. To define the initial state of a component d. To handle side effects in functional components

Question

What is the purpose of the useEffect hook in React?

a. To manage component state

b. To create reusable logic in functional components

c. To define the initial state of a component

d. To handle side effects in functional components

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Solution

The purpose of the useEffect hook in React is:

d. To handle side effects in functional components

Explanation:

In React, a side effect could be data fetching, subscriptions, or manually changing the DOM from React components. These operations can be placed into a useEffect Hook to tell React that your component needs to do something after render. It's like saying "Hey React, please do this thing after you're done rendering."

So, the useEffect hook is not used to manage component state (option a), or to create reusable logic in functional components (option b), or to define the initial state of a component (option c). It's used to handle side effects in functional components (option d).

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