juniorReact Hooks
What is controlled component using useState?
Updated May 6, 2026
Short answer
A controlled component is one where form state is managed by React.
Deep explanation
Input value is tied to state and updated via onChange handler.
Real-world example
Login forms and validation systems.
Common mistakes
- Not updating state on input change.
Follow-up questions
- What is uncontrolled component?
- Why use controlled components?