Użyj setState w komponencie funkcji
const App = () => {
const [state, setState] = React.useState({ first: "hello", second: "world" });
return (
<div>
<input type="text" value={state.first} onChange={(ev) => setState({...state, first: ev.target.value})} />
<input type="text" value={state.second} onChange={(ev) => setState({...state, second: ev.target.value})} />
</div>
)
}
ReactDOM.render(<App />, document.getElementById('app'))
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