Debounce Interview Questions

Learn how to control function execution rates using debouncing and throttling for performance optimization.

Learn how to create a custom debounce function that supports leading-edge, trailing-edge, or both firing modes.

Filter a list in real time by combining a controlled input with array filter(). Add debouncing for API search and useMemo for expensive client-side filtering.

Debouncing delays execution until a user pauses. Build a useDebounce hook with setTimeout and clearTimeout cleanup in useEffect. Use it for search inputs that fetch from an API. Do not debounce client-side filtering — use derived state instead.

Implement a fully working autocomplete component with debouncing, keyboard navigation, async suggestions, loading states, and accessibility.