React Hooks companion: useState vs useEffect without the confusion
Read this after lesson two, before building your first data-fetching component.
CodeHub India · 31 May 20266 min read
TL;DR
useState stores UI memory; useEffect synchronizes with the outside world (fetch, timers, subscriptions). If you are storing fetched data, you usually need both.
Open the matchinginteractive tutorialand keep this article beside you — alternate reading and typing.
Minimal pattern students should memorize
Can I skip useEffect with React Query?
Later yes — master the manual pattern first so libraries make sense.
Strict Mode double invoke — is it a bug?
No in development; it exposes unsafe side effects early.