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# `useSetState`
React state hook that creates `setState` method which works similar to how
`this.setState` works in class components—it merges object changes into
current state.
## Usage
```jsx
import {useSetState} from 'react-use';
const Demo = () => {
const [state, setState] = useSetState({});
return (
<div>
<pre>{JSON.stringify(state, null, 2)}</pre>
<button onClick={() => setState({hello: 'world'})}>hello</button>
<button onClick={() => setState({foo: 'bar'})}>foo</button>
<button
onClick={() => {
setState((prevState) => ({
count: (prevState.count || 0) + 1,
}))
}}
>
count
</button>
</div>
);
};
```
## Reference
```js
const [state, setState] = useSetState({cnt: 0});
setState({cnt: state.cnt + 1});
setState((prevState) => ({
cnt: prevState + 1,
}));
```
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