react-use/docs/useScrollbarWidth.md

# `useScrollbarWidth`

Hook that will return current browser's scrollbar width.  
In case hook been called before DOM ready, it will return `undefined` and will cause re-render on first available RAF.
> **_NOTE:_** it does not work (return 0) for mobile devices, because their scrollbar width can not be determined.

## Usage

```jsx
const Demo = () => {
  const sbw = useScrollbarWidth();

  return (
    <div>
      {sbw === undefined ? `DOM is not ready yet, SBW detection delayed` : `Browser's scrollbar width is ${sbw}px`}
    </div>
  );
};
```

## Reference

```typescript
const sbw: number | undefined = useScrollbarWidth();
```