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# `useDefault`
React state hook that returns the default value when state is null or undefined.
## Usage
```jsx
import {useDefault} from 'react-use';
const Demo = () => {
const initialUser = { name: 'Marshall' }
const defaultUser = { name: 'Mathers' }
const [user, setUser] = useDefault(defaultUser, initialUser);
return (
<div>
<div>User: {user.name}</div>
<input onChange={e => setUser({ name: e.target.value })} />
<button onClick={() => setUser(null)}>set to null</button>
</div>
);
};
```
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