Custom Hooks

Summary

Your own reusable functions (prefixed `use...`) that extract and share stateful logic between components — commonly used to wrap API calls, forms, or auth logic cleanly.

• 1Extract a repeated data-fetching pattern into a `useFetch` or similar custom hook.
• 2Build a `useAuth` hook wrapping your auth context for easy access anywhere.
• 3Learn that custom hooks are just functions — they don't share state between usages.