← ⚛️ React Foundations24 / 25
Lesson 24 — useInterval hook
Safe timers in hooks
A custom hook wraps setInterval with proper cleanup so it never leaks.
Why it matters: timers done wrong cause stale-closure bugs.
Task
Tick a counter every second with the hook.
Keep going with React Foundations
Ready for more? These paid resources pick up where this lesson leaves off.
UdemyBestsellers
Top-rated React Foundations courses
Project-based React Foundations video courses — the perfect paid next step after these free lessons.
Browse on Udemy →AmazonReader picks
Best React Foundations books
Hand-picked React Foundations books to master the fundamentals offline.
See on Amazon →Some links on this page are affiliate links: we may earn a commission at no extra cost to you. We only recommend tools we believe are genuinely useful.