Implement useDebounce hook.

0-2 years experience

1. 1Can you walk me through how you'd implement a useDebounce hook that takes a value and a delay and returns the debounced value?
2. 2If the component using your hook unmounts before the timeout fires, what cleanup step is required?
3. 3What happens to the debounced output if the delay prop changes between renders?

2-5 years experience

1. 1You have a search input that triggers an API call on every keystroke. How would you integrate your useDebounce hook to reduce network traffic, and what edge cases would you watch for?
2. 2During a code review, a teammate notes that your hook's effect runs on every render. How would you modify the implementation to avoid unnecessary re‑executions?
3. 3If the API call fails, how do you ensure the debounced value still reflects the latest user input?

5-8 years experience

1. 1In a dashboard with dozens of widgets each using useDebounce, how would you assess the overall performance impact and mitigate any slowdown?
2. 2How would you adapt your hook to work correctly with server‑side rendering where setTimeout isn't available?
3. 3If you needed a single hook that could handle both debounce and throttle behavior, how would you design its API and internal logic?

8+ years experience

1. 1Your team is migrating legacy class components that implement manual debouncing to a shared functional library using useDebounce across many products. What architectural plan would you propose to ensure consistency and avoid regressions?
2. 2How would you version, document, and deprecate this custom hook in a company‑wide component library to support future changes without breaking downstream applications?
3. 3If the organization wants to enforce that all network requests are debounced, how would you embed useDebounce at an architectural level—perhaps via a higher‑order fetch wrapper—and what trade‑offs would you consider?