How do you avoid stale closures in hooks?
PICTURE THIS: ARRAY IN MEMORY
Index starts at 0. Scan once for max — O(n).
Simple meaning
Effects and callbacks capture the props and state from the render that created them.
WHY — React instead of guessing?
Why interviewers care about React:
question about React.
trade-offs, and what you would actually do on a Full Stack project - not buzzwords.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1Effects and callbacks capture
the props and state from the render that created them.
- 2Missing dependencies or an
empty array with used values is the usual bug.
- 3Functional state updates and
refs for the latest callback are the standard fixes.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
Effects and callbacks capture the props and state from the render that created them. Missing dependencies or an empty array with used values is the usual bug.