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# `useFirstMountState`
Returns `true` if component is just mounted (on first render) and `false` otherwise.
## Usage
```typescript jsx
import * as React from 'react';
import { useFirstMountState } from 'react-use';
const Demo = () => {
const isFirstMount = useFirstMountState();
const update = useUpdate();
return (
<div>
<span>This component is just mounted: {isFirstMount ? 'YES' : 'NO'}</span>
<br />
<button onClick={update}>re-render</button>
</div>
);
};
```
## Reference
```typescript
const isFirstMount: boolean = useFirstMountState();
```
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