In ReactJS, Custom Hooks are reusable functions that encapsulate logic using built-in React hooks like useState, useEffect, useContext, etc. They allow you to extract and share stateful logic between components without rewriting code.

📌 Why Use Custom Hooks?

• Reusability: Share logic across multiple components.
• Clean Code: Avoid component bloat by moving logic to a separate hook.
• Separation of Concerns: Manage specific concerns like API calls, form handling, or authentication.
• Testability: Custom Hooks can be unit-tested independently.

🛠️ Creating a Custom Hook

A custom hook is essentially a function that starts with the prefix use. Here's a simple structure:

jsx
<div>      <input value={name} onChange={(e) => setName(e.target.value)} />      <p>Stored Name: {name}</p>    </div>  );}

🧑‍💻 Tips for Writing Custom Hooks

1. Start with use: Always use the use prefix to ensure React recognizes it as a hook.
2. Use Other Hooks Inside: You can combine multiple hooks inside a custom hook.
3. Return Values Smartly: Return only what's necessary (e.g., state, setters, or functions).
4. Encapsulate Reusable Logic: Think of scenarios like authentication, API calls, form management, or theme management.
5. Keep it Pure: Avoid side effects unless necessary.