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# `useWindowSize`
React sensor hook that tracks dimensions of the browser window.
## Usage
```jsx
import {useWindowSize} from 'react-use';
const Demo = () => {
const {width, height} = useWindowSize();
return (
<div>
<div>width: {width}</div>
<div>height: {height}</div>
</div>
);
};
```
## Reference
```js
useWindowSize(options);
```
- `initialWidth` — Initial width value for non-browser environments.
- `initialHeight` — Initial height value for non-browser environments.
- `onChange` — Callback function triggered when the window size changes.
## Related hooks
- [useSize](./useSize.md)
- [useMeasure](./useMeasure.md) |