React Hooks Explained for Beginners — useState & useEffect
Understand React hooks: useState for state, useEffect for side effects, and rules of hooks for functional components.
React hooksreact hooks explainedusestate useeffectreact hooks tutorial
useState and useEffect Explained
Hooks let functional React components use state and lifecycle features. useState and useEffect are the two you'll use daily.
Why React hooks Matters
Hooks are how modern React components manage state and side effects — class components are legacy in new codebases.
The dependency array in useEffect controls when effects re-run; omitting it causes infinite loops, over-specifying causes stale bugs.
React hooks — Key Ideas You Must Know
- useState returns [value, setter]
- State updates trigger re-renders
- useEffect runs after render
- Dependency array controls effect timing
- Only call hooks at top level
Practice React hooks with Free Lessons
Master JavaScript and DOM first on Sturdee, then explore React in a Next.js project.
Tip: Free interactive lesson: /tutorials/javascript — practice React hooks with runnable code on Sturdee.
React Hooks Explained for Beginners — FAQ
Frequently Asked Questions
Are class components dead?+
Most new code uses hooks. You may see classes in legacy apps.
Continue learning interactively
Free tutorial: /tutorials/javascript →