What is useEffect in React?

useEffect is a built-in React Hook that lets you run code after the component renders.

It’s commonly used for:

• Fetching data from APIs
• Setting up subscriptions
• Updating the DOM
• Cleaning up on unmount

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🧠 Basic Example

tsx
import { useEffect } from 'react';

useEffect(() => {
  console.log("Component mounted!");
}, []);