Lesson 05 · 11 min
A controlled input
You take the field's value from state and write it back in onChange. One source of truth.
A controlled input: value={title} and onChange={(e) => setTitle(e.target.value)}. React draws what's in state. Uncontrolled (defaultValue + ref) exists too, but for a form with validation and a "submit" button control is simpler: you always know what's on screen.
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