juniorReact Hooks
What is a custom hook in React?
Updated May 6, 2026
Short answer
A custom hook is a reusable function that encapsulates logic using built-in hooks.
Deep explanation
Custom hooks start with 'use' and allow sharing logic across components.
Real-world example
Reusable form handling or API logic.
Common mistakes
- Not following naming convention 'use*'.
Follow-up questions
- Can custom hooks call other hooks?
- Do custom hooks share state?