useEffect & Side Effects — Roadmap Step & Resources
Data fetching, subscriptions, cleanup functions and the dependency array
- Level: intermediate
- Estimated time: 2 days
- Roadmap: Next.js Full Stack
Before this step
Interview questions
- What is the dependency array in useEffect for?
Study resources
- Everything You Need To Know About useEffect (Article) — Web Dev Simplified's much-referenced deep-dive article on useEffect, dependency arrays and cleanup functions.
- React useEffect Hook Simplified with Examples (Video) — A practical, example-driven walkthrough of useEffect's dependency array and cleanup behavior.
- Synchronizing with Effects (Article) — The official React documentation's canonical guide to useEffect, lifecycles, and effect cleanup.
- Learn useEffect In 13 Minutes (Video) — Web Dev Simplified visualizes mount/unmount stages, dependency triggers, and cleanup listeners.
Part of
- React Fundamentals — section
- Next.js Full Stack roadmap — the full learning path