What does `custom hooks` do and when should you use it?

Summary

Custom hooks extract reusable stateful logic into functions that call React hooks.

Longer Answer

A custom hook is just a function whose name starts with use and that follows the Rules of Hooks. It can encapsulate subscriptions, forms, data fetching orchestration, local storage, media queries, keyboard shortcuts, or feature-specific state machines.

Use custom hooks when multiple components need the same logic or when a component is becoming hard to read. Do not extract too early if it hides important component behavior or creates a vague generic API.

Key Points

• A custom hook is just a function whose name starts with use and that follows the Rules of Hooks
• It can encapsulate subscriptions, forms, data fetching orchestration, local storage, media queries, keyboard shortcuts, or feature-specific state machines
• Use custom hooks when multiple components need the same logic or when a component is becoming hard to read
• For 'What does custom hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs.

Use custom hooks when multiple components need the same logic or when a component is becoming hard to read. Do not extract too early if it hides important component behavior or creates a vague generic API

Comparison / Tradeoffs

Use custom hooks when multiple components need the same logic or when a component is becoming hard to read. Do not extract too early if it hides important component behavior or creates a vague generic API. |

Summary

Custom hooks extract reusable stateful logic into functions that call React hooks.

Longer Answer

For 'What does custom hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs.

Use custom hooks when multiple components need the same logic or when a component is becoming hard to read. Do not extract too early if it hides important component behavior or creates a vague generic API.

Key Points

• For 'What does custom hooks do and when should you use it?', the key is to explain what problem the concept solves, where it fits in React's rendering model, and what mistake causes production bugs
• Use custom hooks when multiple components need the same logic or when a component is becoming hard to read
• Do not extract too early if it hides important component behavior or creates a vague generic API
• Use the answer to connect the concept back to a realistic production or interview scenario for 'What does custom hooks do and when should you use it?'

Comparison / Tradeoffs