What are controlled vs uncontrolled components?

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Controlled Components

  • A controlled component is one where React controls the form input value using state.

  • The input field’s value is tied to a React state variable, and any change triggers onChange to update state.

  • This ensures React has full control over the data, making it easy to validate, manipulate, or reset.

Uncontrolled Components

  • In uncontrolled components, the DOM itself manages the input value instead of React.

  • You use ref to directly access the input’s current value when needed.

  • These behave more like traditional HTML form elements.


Key Differences

  • Controlled: React state is the “single source of truth.” Easier validation, predictable behavior.

  • Uncontrolled: Faster to set up, less code, but harder to manage/validate for large forms.

✅ In short:

  • Use controlled components for complex forms where validation and synchronization matter.

  • Use uncontrolled components for simple, quick inputs where React state management isn’t necessary.

Read More:


What is conditional rendering?

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