Engineering2025-12-281 min read

Understanding React Hooks

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A deep dive into useState and useEffect with visual diagrams.

#react #hooks #frontend

React Hooks revolutionized how we write components. Let's explore the core hooks.

The State Hook: useState

The useState hook allows you to add state to function components.

tsx

import { useState } from 'react';

function Counter() {
  const [count, setCount] = useState(0);

  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

The Effect Hook: useEffect

useEffect handles side effects like data fetching or subscriptions.

Dependency Array Logic

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